\n
address_offset : 0x0 Bytes (0x0)
size : 0x1000 byte (0x0)
mem_usage : registers
protection :
GPDMA secure configuration register
address_offset : 0x0 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SEC0 : SEC0
bits : 0 - 0 (1 bit)
access : read-write
SEC1 : SEC1
bits : 1 - 1 (1 bit)
access : read-write
SEC2 : SEC2
bits : 2 - 2 (1 bit)
access : read-write
SEC3 : SEC3
bits : 3 - 3 (1 bit)
access : read-write
SEC4 : SEC4
bits : 4 - 4 (1 bit)
access : read-write
SEC5 : SEC5
bits : 5 - 5 (1 bit)
access : read-write
SEC6 : SEC6
bits : 6 - 6 (1 bit)
access : read-write
SEC7 : SEC7
bits : 7 - 7 (1 bit)
access : read-write
SEC8 : SEC8
bits : 8 - 8 (1 bit)
access : read-write
SEC9 : SEC9
bits : 9 - 9 (1 bit)
access : read-write
SEC10 : SEC10
bits : 10 - 10 (1 bit)
access : read-write
SEC11 : SEC11
bits : 11 - 11 (1 bit)
access : read-write
SEC12 : SEC12
bits : 12 - 12 (1 bit)
access : read-write
SEC13 : SEC13
bits : 13 - 13 (1 bit)
access : read-write
SEC14 : SEC14
bits : 14 - 14 (1 bit)
access : read-write
SEC15 : SEC15
bits : 15 - 15 (1 bit)
access : read-write
GPDMA secure masked interrupt status register
address_offset : 0x10 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
MIS0 : MIS0
bits : 0 - 0 (1 bit)
access : read-only
MIS1 : MIS1
bits : 1 - 1 (1 bit)
access : read-only
MIS2 : MIS2
bits : 2 - 2 (1 bit)
access : read-only
MIS3 : MIS3
bits : 3 - 3 (1 bit)
access : read-only
MIS4 : MIS4
bits : 4 - 4 (1 bit)
access : read-only
MIS5 : MIS5
bits : 5 - 5 (1 bit)
access : read-only
MIS6 : MIS6
bits : 6 - 6 (1 bit)
access : read-only
MIS7 : MIS7
bits : 7 - 7 (1 bit)
access : read-only
MIS8 : MIS8
bits : 8 - 8 (1 bit)
access : read-only
MIS9 : MIS9
bits : 9 - 9 (1 bit)
access : read-only
MIS10 : MIS10
bits : 10 - 10 (1 bit)
access : read-only
MIS11 : MIS11
bits : 11 - 11 (1 bit)
access : read-only
MIS12 : MIS12
bits : 12 - 12 (1 bit)
access : read-only
MIS13 : MIS13
bits : 13 - 13 (1 bit)
access : read-only
MIS14 : MIS14
bits : 14 - 14 (1 bit)
access : read-only
MIS15 : MIS15
bits : 15 - 15 (1 bit)
access : read-only
GPDMA channel 1 transfer register 1
address_offset : 0x110 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SDW_LOG2 : binary logarithm of the source data width of a burst in bytes Note: Setting a 8-byte data width causes a user setting error to be reported and no transfer is issued. A source block size must be a multiple of the source data width (GPDMA_CxBR1.BNDT[2:0] versus SDW_LOG2[1:0]). Otherwise, a user setting error is reported and no transfer is issued. A source single transfer must have an aligned address with its data width (start address GPDMA_CxSAR[2:0] versus SDW_LOG2[1:0]). Otherwise, a user setting error is reported and none transfer is issued.
bits : 0 - 1 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
byte
0x1 : B_0x1
half-word (2 bytes)
0x2 : B_0x2
word (4 bytes)
0x3 : B_0x3
user setting error reported and no transfer issued
End of enumeration elements list.
SINC : source incrementing burst The source address, pointed by GPDMA_CxSAR, is kept constant after a burst beat/single transfer or is incremented by the offset value corresponding to a contiguous data after a burst beat/single transfer.
bits : 3 - 3 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
fixed burst
0x1 : B_0x1
contiguously incremented burst
End of enumeration elements list.
SBL_1 : source burst length minus 1, between 0 and 63 The burst length unit is one data named beat within a burst. If SBL_1[5:0] =0 , the burst can be named as single. Each data/beat has a width defined by the destination data width SDW_LOG2[1:0]. Note: If a burst transfer crossed a 1-Kbyte address boundary on a AHB transfer, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the AHB protocol. If a burst transfer is of length greater than the FIFO size of the channel x, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the FIFO size. Transfer performance is lower, with GPDMA re-arbitration between effective and lower bursts/singles, but the data integrity is guaranteed.
bits : 4 - 9 (6 bit)
access : read-write
PAM : padding/alignment mode If DDW_LOG2[1:0] = SDW_LOG2[1:0]: if the data width of a burst destination transfer is equal to the data width of a burst source transfer, these bits are ignored. Else: - Case 1: If destination data width > source data width 1x: successive source data are FIFO queued and packed at the destination data width, in a left (LSB) to right (MSB) order (named little endian), before a destination transfer - Case 2: If destination data width < source data width 1x: source data is FIFO queued and unpacked at the destination data width, to be transferred in a left (LSB) to right (MSB) order (named little endian) to the destination Note:
bits : 11 - 12 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
source data is transferred as right aligned, left-truncated down to the destination data width
0x1 : B_0x1
source data is transferred as left-aligned, right-truncated down to the destination data width
0x0 : B_0x0
source data is transferred as right aligned, left-truncated down to the destination data width
0x1 : B_0x1
source data is transferred as left-aligned, right-truncated down to the destination data width
End of enumeration elements list.
SBX : source byte exchange within the unaligned half-word of each source word If the source data width is shorter than a word, this bit is ignored. If the source data width is a word:
bits : 13 - 13 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no byte-based exchange within the unaligned half-word of each source word
0x1 : B_0x1
the two consecutive bytes within the unaligned half-word of each source word are exchanged.
End of enumeration elements list.
SAP : source allocated port This bit is used to allocate the master port for the source transfer Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 14 - 14 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
SSEC : security attribute of the GPDMA transfer from the source If GPDMA_SECCFGR.SECx = 1 and the access is secure: This is a secure register bit. This bit can only be read by a secure software. This bit must be written by a secure software when GPDMA_SECCFGR.SECx =1 . A secure write is ignored when GPDMA_SECCFGR.SECx = 0. When GPDMA_SECCFGR.SECx is de-asserted, this SSEC bit is also de-asserted by hardware (on a secure reconfiguration of the channel as non-secure), and the GPDMA transfer from the source is non-secure.
bits : 15 - 15 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
GPDMA transfer non-secure
0x1 : B_0x1
GPDMA transfer secure
End of enumeration elements list.
DDW_LOG2 : binary logarithm of the destination data width of a burst, in bytes Note: Setting a 8-byte data width causes a user setting error to be reported and none transfer is issued. A destination burst transfer must have an aligned address with its data width (start address GPDMA_CxDAR[2:0] and address offset GPDMA_CxTR3.DAO[2:0], versus DDW_LOG2[1:0]). Otherwise a user setting error is reported and no transfer is issued.
bits : 16 - 17 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
byte
0x1 : B_0x1
half-word (2 bytes)
0x2 : B_0x2
word (4 bytes)
0x3 : B_0x3
user setting error reported and no transfer issued
End of enumeration elements list.
DINC : destination incrementing burst The destination address, pointed by GPDMA_CxDAR, is kept constant after a burst beat/single transfer, or is incremented by the offset value corresponding to a contiguous data after a burst beat/single transfer.
bits : 19 - 19 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
fixed burst
0x1 : B_0x1
contiguously incremented burst
End of enumeration elements list.
DBL_1 : destination burst length minus 1, between 0 and 63 The burst length unit is one data named beat within a burst. If DBL_1[5:0] =0 , the burst can be named as single. Each data/beat has a width defined by the destination data width DDW_LOG2[1:0]. Note: If a burst transfer crossed a 1-Kbyte address boundary on a AHB transfer, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the AHB protocol. If a burst transfer is of length greater than the FIFO size of the channel x, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the FIFO size. Transfer performance is lower, with GPDMA re-arbitration between effective and lower bursts/singles, but the data integrity is guaranteed.
bits : 20 - 25 (6 bit)
access : read-write
DBX : destination byte exchange If the destination data size is a byte, this bit is ignored. If the destination data size is not a byte:
bits : 26 - 26 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no byte-based exchange within half-word
0x1 : B_0x1
the two consecutive (post PAM) bytes are exchanged in each destination half-word.
End of enumeration elements list.
DHX : destination half-word exchange If the destination data size is shorter than a word, this bit is ignored. If the destination data size is a word:
bits : 27 - 27 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no halfword-based exchanged within word
0x1 : B_0x1
the two consecutive (post PAM) half-words are exchanged in each destination word.
End of enumeration elements list.
DAP : destination allocated port This bit is used to allocate the master port for the destination transfer Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
DSEC : security attribute of the GPDMA transfer to the destination If GPDMA_SECCFGR.SECx = 1 and the access is secure: This is a secure register bit. This bit can only be read by a secure software. This bit must be written by a secure software when GPDMA_SECCFGR.SECx = 1. A secure write is ignored when GPDMA_SECCFGR.SECx = 0. When GPDMA_SECCFGR.SECx is de-asserted, this DSEC bit is also de-asserted by hardware (on a secure reconfiguration of the channel as non-secure), and the GPDMA transfer to the destination is non-secure.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
GPDMA transfer non-secure
0x1 : B_0x1
GPDMA transfer secure
End of enumeration elements list.
GPDMA channel 1 transfer register 2
address_offset : 0x114 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
REQSEL : GPDMA hardware request selection These bits are ignored if channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer). Else, the selected hardware request is internally taken into account as per . The user must not assign a same input hardware request (same REQSEL[6:0] value) to different active GPDMA channels (GPDMA_CxCR.EN = 1 and GPDMA_CxTR2.SWREQ = 0 for these channels). GPDMA is not intended to hardware support the case of simultaneous enabled channels incorrectly configured with a same hardware peripheral request signal, and there is no user setting error reporting.
bits : 0 - 6 (7 bit)
access : read-write
SWREQ : software request This bit is internally taken into account when GPDMA_CxCR.EN is asserted.
bits : 9 - 9 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no software request. The selected hardware request REQSEL[6:0] is taken into account.
0x1 : B_0x1
software request for a memory-to-memory transfer. The default selected hardware request as per REQSEL[6:0] is ignored.
End of enumeration elements list.
DREQ : destination hardware request This bit is ignored if channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer). Else: Note:
bits : 10 - 10 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
selected hardware request driven by a source peripheral (request signal taken into account by the GPDMA transfer scheduler over the source/read port)
0x1 : B_0x1
selected hardware request driven by a destination peripheral (request signal taken into account by the GPDMA transfer scheduler over the destination/write port)
End of enumeration elements list.
BREQ : Block hardware request If the channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer), this bit is ignored. Else:
bits : 11 - 11 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
the selected hardware request is driven by a peripheral with a hardware request/acknowledge protocol at a burst level.
0x1 : B_0x1
the selected hardware request is driven by a peripheral with a hardware request/acknowledge protocol at a block level (see ).
End of enumeration elements list.
TRIGM : trigger mode These bits define the transfer granularity for its conditioning by the trigger. If the channel x is enabled (GPDMA_CxCR.EN asserted) with TRIGPOL[1:0] = 00 or 11, these TRIGM[1:0] bits are ignored. Else, a GPDMA transfer is conditioned by at least one trigger hit: first burst read of a 2D/repeated block transfer is conditioned by one hit trigger. – If the peripheral is programmed as a source (DREQ = 0) of the LLI data transfer, each programmed burst read is conditioned. – If the peripheral is programmed as a destination (DREQ = 1) of the LLI data transfer, each programmed burst write is conditioned. The first memory burst read of a (possibly 2D/repeated) block, also named as the first ready FIFO-based source burst, is gated by the occurrence of both the hardware request and the first trigger hit. The GPDMA monitoring of a trigger for channel x is started when the channel is enabled/loaded with a new active trigger configuration: rising or falling edge on a selected trigger (TRIGPOL[1:0] = 01 or respectively TRIGPOL[1:0] = 10). The monitoring of this trigger is kept active during the triggered and uncompleted (data or link) transfer and if a new trigger is detected then, this hit is internally memorized to grant the next transfer, as long as the defined rising or falling edge is not modified, and the TRIGSEL[5:0] is not modified, and the channel is enabled. Transferring a next LLIn+1 that updates the GPDMA_CxTR2 with a new value for any of TRIGSEL[5:0] or TRIGPOL[1:0], resets the monitoring, trashing the memorized hit of the formerly defined LLIn trigger. After a first new trigger hitn+1 is memorized, if another second trigger hitn+2 is detected and if the hitn triggered transfer is still not completed, hitn+2 is lost and not memorized.memorized. A trigger overrun flag is reported (GPDMA_CxSR.TOF =1 ), and an interrupt is generated if enabled (GPDMA_CxCR.TOIE = 1). The channel is not automatically disabled by hardware due to a trigger overrun. Note: When the source block size is not a multiple of the source burst size and is a multiple of the source data width, then the last programmed source burst is not completed and is internally shorten to match the block size. In this case, if TRIGM[1:0] = 11 and (SWREQ =1 or (SWREQ = 0 and DREQ =0 )), the shortened burst transfer (by singles or/and by bursts of lower length) is conditioned once by the trigger. When the programmed destination burst is internally shortened by singles or/and by bursts of lower length (versus FIFO size, versus block size, 1-Kbyte boundary address crossing): if the trigger is conditioning the programmed destination burst (if TRIGM[1:0] = 11 and SWREQ = 0 and DREQ = 1), this shortened destination burst transfer is conditioned once by the trigger.
bits : 14 - 15 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at block level: the first burst read of each block transfer is conditioned by one hit trigger (channel x = 12 to 15, for each block if a 2D/repeated block is configured with GPDMA_CxBR1.BRC[10:0] ≠ 0).
0x1 : B_0x1
channel x = 0 to 11, same as 00 channel x=12 to 15, at 2D/repeated block level, the
0x2 : B_0x2
at link level: a LLI link transfer is conditioned by one hit trigger. The LLI data transfer (if any) is not conditioned.
0x3 : B_0x3
at programmed burst level: If SWREQ = 1, each programmed burst read is conditioned by one hit trigger. If SWREQ = 0, each programmed burst that is requested by the selected peripheral, is conditioned by one hit trigger.
End of enumeration elements list.
TRIGSEL : trigger event input selection These bits select the trigger event input of the GPDMA transfer (as per ), with an active trigger event if TRIGPOL[1:0] ≠ 00.
bits : 16 - 21 (6 bit)
access : read-write
TRIGPOL : trigger event polarity These bits define the polarity of the selected trigger event input defined by TRIGSEL[5:0].
bits : 24 - 25 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no trigger (masked trigger event)
0x1 : B_0x1
trigger on the rising edge
0x2 : B_0x2
trigger on the falling edge
0x3 : B_0x3
same as 00
End of enumeration elements list.
TCEM : transfer complete event mode These bits define the transfer granularity for the transfer complete and half transfer complete events generation. Note: If the initial LLI0 data transfer is null/void (directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] = 0), then neither the complete transfer event nor the half transfer event is generated. Note: If the initial LLI0 data transfer is null/void (directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] = 0), then neither the complete transfer event nor the half transfer event is generated. Note: If the initial LLI0 data transfer is null/void (i.e. directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] =0 ), then the half transfer event is not generated, and the transfer complete event is generated when is completed the loading of the LLI1.
bits : 30 - 31 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at block level (when GPDMA_CxBR1.BNDT[15:0] = 0): the complete (and the half) transfer event is generated at the (respectively half of the) end of a block.
0x1 : B_0x1
channel x = 0 to 11, same as 00 channel x=12 to 15, at 2D/repeated block level (when GPDMA_CxBR1.BRC[10:0] = 0 and GPDMA_CxBR1.BNDT[15:0] = 0), the complete (and the half) transfer event is generated at the end (respectively half of the end) of the 2D/repeated block.
0x2 : B_0x2
at LLI level: the complete transfer event is generated at the end of the LLI transfer, including the update of the LLI if any. The half transfer event is generated at the half of the LLI data transfer (the LLI data transfer being a block transfer or a 2D/repeated block transfer for channel x = 12 to 15), if any data transfer.
0x3 : B_0x3
at channel level: the complete transfer event is generated at the end of the last LLI transfer. The half transfer event is generated at the half of the data transfer of the last LLI. The last LLI updates the link address GPDMA_CxLLR.LA[15:2] to zero and clears all the GPDMA_CxLLR update bits (UT1, UT2, UB1, USA, UDA and ULL, plus UT3 and UB2 if present). If the channel transfer is continuous/infinite, no event is generated.
End of enumeration elements list.
GPDMA channel 1 block register 1
address_offset : 0x118 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
BNDT : block number of data bytes to transfer from the source Block size transferred from the source. When the channel is enabled, this field becomes read-only and is decremented, indicating the remaining number of data items in the current source block to be transferred. BNDT[15:0] is programmed in number of bytes, maximum source block size is 64 Kbytes -1. Once the last data transfer is completed (BNDT[15:0] = 0): - if GPDMA_CxLLR.UB1 = 1, this field is updated by the LLI in the memory. - if GPDMA_CxLLR.UB1 = 0 and if there is at least one non null Uxx update bit, this field is internally restored to the programmed value. - if all GPDMA_CxLLR.Uxx = 0 and if GPDMA_CxLLR.LA[15:0] = 0, this field is internally restored to the programmed value (infinite/continuous last LLI). - if GPDMA_CxLLR = 0, this field is kept as zero following the last LLI data transfer. Note: A non-null source block size must be a multiple of the source data width (BNDT[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued. When configured in packing mode (GPDMA_CxTR1.PAM[1] = 1 and destination data width different from source data width), a non-null source block size must be a multiple of the destination data width (BNDT[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued.
bits : 0 - 15 (16 bit)
access : read-write
GPDMA channel 1 source address register
address_offset : 0x11C Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SA : source address This field is the pointer to the address from which the next data is read. During the channel activity, depending on the source addressing mode (GPDMA_CxTR1.SINC), this field is kept fixed or incremented by the data width (GPDMA_CxTR1.SDW_LOG2[1:0]) after each single source data, reflecting the next address from which data is read. During the channel activity, this address is updated after each completed source burst, consequently to: the programmed source burst either in fixed addressing mode or in contiguous-data incremented mode. If contiguously incremented (GPDMA_CxTR1.SINC = 1), then the additional address offset value is the programmed burst size, as defined by GPDMA_CxTR1.SBL_1[5:0] and GPDMA_CxTR1.SDW_LOG2[21:0] the additional source incremented/decremented offset value as programmed by GPDMA_CxBR1.SDEC and GPDMA_CxTR3.SAO[12:0] once/if completed source block transfer, for a channel x with 2D addressing capability (x = 12 to 15). additional block repeat source incremented/decremented offset value as programmed by GPDMA_CxBR1.BRSDEC and GPDMA_CxBR2.BRSAO[15:0] In linked-list mode, after a LLI data transfer is completed, this register is automatically updated by GPDMA from the memory, provided the LLI is set with GPDMA_CxLLR.USA = 1. Note: A source address must be aligned with the programmed data width of a source single (SA[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued. When the source block size is not a multiple of the source burst size and is a multiple of the source data width, the last programmed source burst is not completed and is internally shorten to match the block size. In this case, the additional GPDMA_CxTR3.SAO[12:0] is not applied.
bits : 0 - 31 (32 bit)
access : read-write
GPDMA channel 1 destination address register
address_offset : 0x120 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
DA : destination address This field is the pointer to the address from which the next data is written. During the channel activity, depending on the destination addressing mode (GPDMA_CxTR1.DINC), this field is kept fixed or incremented by the data width (GPDMA_CxTR1.DDW_LOG2[21:0]) after each single destination data, reflecting the next address from which data is written. During the channel activity, this address is updated after each completed destination burst, consequently to: the programmed destination burst either in fixed addressing mode or in contiguous-data incremented mode. If contiguously incremented (GPDMA_CxTR1.DINC = 1), then the additional address offset value is the programmed burst size, as defined by GPDMA_CxTR1.DBL_1[5:0] and GPDMA_CxTR1.DDW_LOG2[1:0] the additional destination incremented/decremented offset value as programmed by GPDMA_CxBR1.DDEC and GPDMA_CxTR3.DAO[12:0] once/if completed destination block transfer, for a channel x with 2D addressing capability (x = 12 to 15), the additional block repeat destination incremented/decremented offset value as programmed by GPDMA_CxBR1.BRDDEC and GPDMA_CxBR2.BRDAO[15:0] In linked-list mode, after a LLI data transfer is completed, this register is automatically updated by the GPDMA from the memory, provided the LLI is set with GPDMA_CxLLR.UDA = 1. Note: A destination address must be aligned with the programmed data width of a destination burst (DA[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued.
bits : 0 - 31 (32 bit)
access : read-write
GPDMA channel 1 linked-list address register
address_offset : 0x14C Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
LA : pointer (16-bit low-significant address) to the next linked-list data structure If UT1 = UT2 = UB1 = USA = UDA = ULL = 0 and if LA[15:20] = 0, the current LLI is the last one. The channel transfer is completed without any update of the linked-list GPDMA register file. Else, this field is the pointer to the memory address offset from which the next linked-list data structure is automatically fetched from, once the data transfer is completed, in order to conditionally update the linked-list GPDMA internal register file (GPDMA_CxCTR1, GPDMA_CxTR2, GPDMA_CxBR1, GPDMA_CxSAR, GPDMA_CxDAR and GPDMA_CxLLR). Note: The user must program the pointer to be 32-bit aligned. The two low-significant bits are write ignored.
bits : 2 - 15 (14 bit)
access : read-write
ULL : Update GPDMA_CxLLR register from memory This bit is used to control the update of GPDMA_CxLLR from the memory during the link transfer.
bits : 16 - 16 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxLLR update
0x1 : B_0x1
GPDMA_CxLLR update
End of enumeration elements list.
UDA : Update GPDMA_CxDAR register from memory This bit is used to control the update of GPDMA_CxDAR from the memory during the link transfer.
bits : 27 - 27 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxDAR update
0x1 : B_0x1
GPDMA_CxDAR update
End of enumeration elements list.
USA : update GPDMA_CxSAR from memory This bit controls the update of GPDMA_CxSAR from the memory during the link transfer.
bits : 28 - 28 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxSAR update
0x1 : B_0x1
GPDMA_CxSAR update
End of enumeration elements list.
UB1 : Update GPDMA_CxBR1 from memory This bit controls the update of GPDMA_CxBR1 from the memory during the link transfer. If UB1 = 0 and if GPDMA_CxLLR ≠ 0, the linked-list is not completed. GPDMA_CxBR1.BNDT[15:0] is then restored to the programmed value after data transfer is completed and before the link transfer.
bits : 29 - 29 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxBR1 update from memory (GPDMA_CxBR1.BNDT[15:0] restored if any link transfer)
0x1 : B_0x1
GPDMA_CxBR1 update
End of enumeration elements list.
UT2 : Update GPDMA_CxTR2 from memory This bit controls the update of GPDMA_CxTR2 from the memory during the link transfer.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR2 update
0x1 : B_0x1
GPDMA_CxTR2 update
End of enumeration elements list.
UT1 : Update GPDMA_CxTR1 from memory This bit controls the update of GPDMA_CxTR1 from the memory during the link transfer.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR1 update
0x1 : B_0x1
GPDMA_CxTR1 update
End of enumeration elements list.
GPDMA channel 2 linked-list base address register
address_offset : 0x150 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
LBA : linked-list base address of GPDMA channel x
bits : 16 - 31 (16 bit)
access : read-write
GPDMA channel 2 flag clear register
address_offset : 0x15C Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
TCF : transfer complete flag clear
bits : 8 - 8 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding TCF flag cleared
End of enumeration elements list.
HTF : half transfer flag clear
bits : 9 - 9 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding HTF flag cleared
End of enumeration elements list.
DTEF : data transfer error flag clear
bits : 10 - 10 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding DTEF flag cleared
End of enumeration elements list.
ULEF : update link transfer error flag clear
bits : 11 - 11 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding ULEF flag cleared
End of enumeration elements list.
USEF : user setting error flag clear
bits : 12 - 12 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding USEF flag cleared
End of enumeration elements list.
SUSPF : completed suspension flag clear
bits : 13 - 13 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding SUSPF flag cleared
End of enumeration elements list.
TOF : trigger overrun flag clear
bits : 14 - 14 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding TOF flag cleared
End of enumeration elements list.
GPDMA channel 2 status register
address_offset : 0x160 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
IDLEF : idle flag This idle flag is de-asserted by hardware when the channel is enabled (GPDMA_CxCR.EN = 1) with a valid channel configuration (no USEF to be immediately reported). This idle flag is asserted after hard reset or by hardware when the channel is back in idle state (in suspended or disabled state).
bits : 0 - 0 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
channel not in idle state
0x1 : B_0x1
channel in idle state
End of enumeration elements list.
TCF : transfer complete flag A transfer complete event is either a block transfer complete, a 2D/repeated block transfer complete, a LLI transfer complete including the upload of the next LLI if any, or the full linked-list completion, depending on the transfer complete event mode (GPDMA_CxTR2.TCEM[1:0]).
bits : 8 - 8 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no transfer complete event
0x1 : B_0x1
a transfer complete event occurred
End of enumeration elements list.
HTF : half transfer flag An half transfer event is either an half block transfer or an half 2D/repeated block transfer, depending on the transfer complete event mode (GPDMA_CxTR2.TCEM[1:0]). An half block transfer occurs when half of the bytes of the source block size (rounded up integer of GPDMA_CxBR1.BNDT[15:0]/2) has been transferred to the destination. An half 2D/repeated block transfer occurs when half of the repeated blocks (rounded up integer of (GPDMA_CxBR1.BRC[10:0]+1)/2)) has been transferred to the destination.
bits : 9 - 9 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no half transfer event
0x1 : B_0x1
an half transfer event occurred
End of enumeration elements list.
DTEF : data transfer error flag
bits : 10 - 10 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no data transfer error event
0x1 : B_0x1
a master bus error event occurred on a data transfer
End of enumeration elements list.
ULEF : update link transfer error flag
bits : 11 - 11 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no update link transfer error event
0x1 : B_0x1
a master bus error event occurred while updating a linked-list register from memory
End of enumeration elements list.
USEF : user setting error flag
bits : 12 - 12 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no user setting error event
0x1 : B_0x1
a user setting error event occurred
End of enumeration elements list.
SUSPF : completed suspension flag
bits : 13 - 13 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no completed suspension event
0x1 : B_0x1
a completed suspension event occurred
End of enumeration elements list.
TOF : trigger overrun flag
bits : 14 - 14 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no trigger overrun event
0x1 : B_0x1
a trigger overrun event occurred
End of enumeration elements list.
FIFOL : monitored FIFO level Number of available write beats in the FIFO, in units of the programmed destination data width (see GPDMA_CxTR1.DDW_LOG2[1:0], in units of bytes, half-words, or words). Note: After having suspended an active transfer, the user may need to read FIFOL[7:0], additionally to GPDMA_CxBR1.BDNT[15:0] and GPDMA_CxBR1.BRC[10:0], to know how many data have been transferred to the destination. Before reading, the user may wait for the transfer to be suspended (GPDMA_CxSR.SUSPF = 1).
bits : 16 - 23 (8 bit)
access : read-only
GPDMA channel 2 control register
address_offset : 0x164 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
EN : enable Writing 1 into the field RESET (bit 1) causes the hardware to de-assert this bit, whatever is written into this bit 0. Else: this bit is de-asserted by hardware when there is a transfer error (master bus error or user setting error) or when there is a channel transfer complete (channel ready to be configured, e.g. if LSM=1 at the end of a single execution of the LLI). Else, this bit can be asserted by software. Writing 0 into this EN bit is ignored.
bits : 0 - 0 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
write: ignored, read: channel disabled
0x1 : B_0x1
write: enable channel, read: channel enabled
End of enumeration elements list.
RESET : reset This bit is write only. Writing 0 has no impact. Writing 1 implies the reset of the following: the FIFO, the channel internal state, SUSP and EN bits (whatever is written receptively in bit 2 and bit 0). The reset is effective when the channel is in steady state, meaning one of the following: - active channel in suspended state (GPDMA_CxSR.SUSPF = 1 and GPDMA_CxSR.IDLEF = GPDMA_CxCR.EN = 1) - channel in disabled state (GPDMA_CxSR.IDLEF = 1 and GPDMA_CxCR.EN = 0). After writing a RESET, to continue using this channel, the user must explicitly reconfigure the channel including the hardware-modified configuration registers (GPDMA_CxBR1, GPDMA_CxSAR and GPDMA_CxDAR) before enabling again the channel (see the programming sequence in ).
bits : 1 - 1 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no channel reset
0x1 : B_0x1
channel reset
End of enumeration elements list.
SUSP : suspend Writing 1 into the field RESET (bit 1) causes the hardware to de-assert this bit, whatever is written into this bit 2. Else: Software must write 1 in order to suspend an active channel i.e. a channel with an on-going GPDMA transfer over its master ports. The software must write 0 in order to resume a suspended channel, following the programming sequence detailed in .
bits : 2 - 2 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
write: resume channel, read: channel not suspended
0x1 : B_0x1
write: suspend channel, read: channel suspended.
End of enumeration elements list.
TCIE : transfer complete interrupt enable
bits : 8 - 8 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
HTIE : half transfer complete interrupt enable
bits : 9 - 9 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
DTEIE : data transfer error interrupt enable
bits : 10 - 10 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
ULEIE : update link transfer error interrupt enable
bits : 11 - 11 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
USEIE : user setting error interrupt enable
bits : 12 - 12 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
SUSPIE : completed suspension interrupt enable
bits : 13 - 13 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
TOIE : trigger overrun interrupt enable
bits : 14 - 14 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
LSM : Link step mode First the (possible 1D/repeated) block transfer is executed as defined by the current internal register file until GPDMA_CxBR1.BNDT[15:0] = 0 and GPDMA_CxBR1.BRC[10:0] = 0 if present. Secondly the next linked-list data structure is conditionally uploaded from memory as defined by GPDMA_CxLLR. Then channel execution is completed. Note: This bit must be written when EN=0. This bit is read-only when EN=1.
bits : 16 - 16 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
channel executed for the full linked-list and completed at the end of the last LLI (GPDMA_CxLLR = 0). The 16 low-significant bits of the link address are null (LA[15:0] = 0) and all the update bits are null (UT1 =UB1 = UT2 = USA = UDA = ULL = 0 and UT3 = UB2 = 0 if present). Then GPDMA_CxBR1.BNDT[15:0] = 0 and GPDMA_CxBR1.BRC[10:0] = 0 if present.
0x1 : B_0x1
channel executed once for the current LLI
End of enumeration elements list.
LAP : linked-list allocated port This bit is used to allocate the master port for the update of the GPDMA linked-list registers from the memory. Note: This bit must be written when EN=0. This bit is read-only when EN=1.
bits : 17 - 17 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
PRIO : priority level of the channel x GPDMA transfer versus others Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 22 - 23 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
low priority, low weight
0x1 : B_0x1
low priority, mid weight
0x2 : B_0x2
low priority, high weight
0x3 : B_0x3
high priority
End of enumeration elements list.
GPDMA channel 2 transfer register 1
address_offset : 0x190 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SDW_LOG2 : binary logarithm of the source data width of a burst in bytes Note: Setting a 8-byte data width causes a user setting error to be reported and no transfer is issued. A source block size must be a multiple of the source data width (GPDMA_CxBR1.BNDT[2:0] versus SDW_LOG2[1:0]). Otherwise, a user setting error is reported and no transfer is issued. A source single transfer must have an aligned address with its data width (start address GPDMA_CxSAR[2:0] versus SDW_LOG2[1:0]). Otherwise, a user setting error is reported and none transfer is issued.
bits : 0 - 1 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
byte
0x1 : B_0x1
half-word (2 bytes)
0x2 : B_0x2
word (4 bytes)
0x3 : B_0x3
user setting error reported and no transfer issued
End of enumeration elements list.
SINC : source incrementing burst The source address, pointed by GPDMA_CxSAR, is kept constant after a burst beat/single transfer or is incremented by the offset value corresponding to a contiguous data after a burst beat/single transfer.
bits : 3 - 3 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
fixed burst
0x1 : B_0x1
contiguously incremented burst
End of enumeration elements list.
SBL_1 : source burst length minus 1, between 0 and 63 The burst length unit is one data named beat within a burst. If SBL_1[5:0] =0 , the burst can be named as single. Each data/beat has a width defined by the destination data width SDW_LOG2[1:0]. Note: If a burst transfer crossed a 1-Kbyte address boundary on a AHB transfer, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the AHB protocol. If a burst transfer is of length greater than the FIFO size of the channel x, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the FIFO size. Transfer performance is lower, with GPDMA re-arbitration between effective and lower bursts/singles, but the data integrity is guaranteed.
bits : 4 - 9 (6 bit)
access : read-write
PAM : padding/alignment mode If DDW_LOG2[1:0] = SDW_LOG2[1:0]: if the data width of a burst destination transfer is equal to the data width of a burst source transfer, these bits are ignored. Else: - Case 1: If destination data width > source data width 1x: successive source data are FIFO queued and packed at the destination data width, in a left (LSB) to right (MSB) order (named little endian), before a destination transfer - Case 2: If destination data width < source data width 1x: source data is FIFO queued and unpacked at the destination data width, to be transferred in a left (LSB) to right (MSB) order (named little endian) to the destination Note:
bits : 11 - 12 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
source data is transferred as right aligned, left-truncated down to the destination data width
0x1 : B_0x1
source data is transferred as left-aligned, right-truncated down to the destination data width
0x0 : B_0x0
source data is transferred as right aligned, left-truncated down to the destination data width
0x1 : B_0x1
source data is transferred as left-aligned, right-truncated down to the destination data width
End of enumeration elements list.
SBX : source byte exchange within the unaligned half-word of each source word If the source data width is shorter than a word, this bit is ignored. If the source data width is a word:
bits : 13 - 13 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no byte-based exchange within the unaligned half-word of each source word
0x1 : B_0x1
the two consecutive bytes within the unaligned half-word of each source word are exchanged.
End of enumeration elements list.
SAP : source allocated port This bit is used to allocate the master port for the source transfer Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 14 - 14 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
SSEC : security attribute of the GPDMA transfer from the source If GPDMA_SECCFGR.SECx = 1 and the access is secure: This is a secure register bit. This bit can only be read by a secure software. This bit must be written by a secure software when GPDMA_SECCFGR.SECx =1 . A secure write is ignored when GPDMA_SECCFGR.SECx = 0. When GPDMA_SECCFGR.SECx is de-asserted, this SSEC bit is also de-asserted by hardware (on a secure reconfiguration of the channel as non-secure), and the GPDMA transfer from the source is non-secure.
bits : 15 - 15 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
GPDMA transfer non-secure
0x1 : B_0x1
GPDMA transfer secure
End of enumeration elements list.
DDW_LOG2 : binary logarithm of the destination data width of a burst, in bytes Note: Setting a 8-byte data width causes a user setting error to be reported and none transfer is issued. A destination burst transfer must have an aligned address with its data width (start address GPDMA_CxDAR[2:0] and address offset GPDMA_CxTR3.DAO[2:0], versus DDW_LOG2[1:0]). Otherwise a user setting error is reported and no transfer is issued.
bits : 16 - 17 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
byte
0x1 : B_0x1
half-word (2 bytes)
0x2 : B_0x2
word (4 bytes)
0x3 : B_0x3
user setting error reported and no transfer issued
End of enumeration elements list.
DINC : destination incrementing burst The destination address, pointed by GPDMA_CxDAR, is kept constant after a burst beat/single transfer, or is incremented by the offset value corresponding to a contiguous data after a burst beat/single transfer.
bits : 19 - 19 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
fixed burst
0x1 : B_0x1
contiguously incremented burst
End of enumeration elements list.
DBL_1 : destination burst length minus 1, between 0 and 63 The burst length unit is one data named beat within a burst. If DBL_1[5:0] =0 , the burst can be named as single. Each data/beat has a width defined by the destination data width DDW_LOG2[1:0]. Note: If a burst transfer crossed a 1-Kbyte address boundary on a AHB transfer, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the AHB protocol. If a burst transfer is of length greater than the FIFO size of the channel x, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the FIFO size. Transfer performance is lower, with GPDMA re-arbitration between effective and lower bursts/singles, but the data integrity is guaranteed.
bits : 20 - 25 (6 bit)
access : read-write
DBX : destination byte exchange If the destination data size is a byte, this bit is ignored. If the destination data size is not a byte:
bits : 26 - 26 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no byte-based exchange within half-word
0x1 : B_0x1
the two consecutive (post PAM) bytes are exchanged in each destination half-word.
End of enumeration elements list.
DHX : destination half-word exchange If the destination data size is shorter than a word, this bit is ignored. If the destination data size is a word:
bits : 27 - 27 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no halfword-based exchanged within word
0x1 : B_0x1
the two consecutive (post PAM) half-words are exchanged in each destination word.
End of enumeration elements list.
DAP : destination allocated port This bit is used to allocate the master port for the destination transfer Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
DSEC : security attribute of the GPDMA transfer to the destination If GPDMA_SECCFGR.SECx = 1 and the access is secure: This is a secure register bit. This bit can only be read by a secure software. This bit must be written by a secure software when GPDMA_SECCFGR.SECx = 1. A secure write is ignored when GPDMA_SECCFGR.SECx = 0. When GPDMA_SECCFGR.SECx is de-asserted, this DSEC bit is also de-asserted by hardware (on a secure reconfiguration of the channel as non-secure), and the GPDMA transfer to the destination is non-secure.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
GPDMA transfer non-secure
0x1 : B_0x1
GPDMA transfer secure
End of enumeration elements list.
GPDMA channel 2 transfer register 2
address_offset : 0x194 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
REQSEL : GPDMA hardware request selection These bits are ignored if channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer). Else, the selected hardware request is internally taken into account as per . The user must not assign a same input hardware request (same REQSEL[6:0] value) to different active GPDMA channels (GPDMA_CxCR.EN = 1 and GPDMA_CxTR2.SWREQ = 0 for these channels). GPDMA is not intended to hardware support the case of simultaneous enabled channels incorrectly configured with a same hardware peripheral request signal, and there is no user setting error reporting.
bits : 0 - 6 (7 bit)
access : read-write
SWREQ : software request This bit is internally taken into account when GPDMA_CxCR.EN is asserted.
bits : 9 - 9 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no software request. The selected hardware request REQSEL[6:0] is taken into account.
0x1 : B_0x1
software request for a memory-to-memory transfer. The default selected hardware request as per REQSEL[6:0] is ignored.
End of enumeration elements list.
DREQ : destination hardware request This bit is ignored if channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer). Else: Note:
bits : 10 - 10 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
selected hardware request driven by a source peripheral (request signal taken into account by the GPDMA transfer scheduler over the source/read port)
0x1 : B_0x1
selected hardware request driven by a destination peripheral (request signal taken into account by the GPDMA transfer scheduler over the destination/write port)
End of enumeration elements list.
BREQ : Block hardware request If the channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer), this bit is ignored. Else:
bits : 11 - 11 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
the selected hardware request is driven by a peripheral with a hardware request/acknowledge protocol at a burst level.
0x1 : B_0x1
the selected hardware request is driven by a peripheral with a hardware request/acknowledge protocol at a block level (see ).
End of enumeration elements list.
TRIGM : trigger mode These bits define the transfer granularity for its conditioning by the trigger. If the channel x is enabled (GPDMA_CxCR.EN asserted) with TRIGPOL[1:0] = 00 or 11, these TRIGM[1:0] bits are ignored. Else, a GPDMA transfer is conditioned by at least one trigger hit: first burst read of a 2D/repeated block transfer is conditioned by one hit trigger. – If the peripheral is programmed as a source (DREQ = 0) of the LLI data transfer, each programmed burst read is conditioned. – If the peripheral is programmed as a destination (DREQ = 1) of the LLI data transfer, each programmed burst write is conditioned. The first memory burst read of a (possibly 2D/repeated) block, also named as the first ready FIFO-based source burst, is gated by the occurrence of both the hardware request and the first trigger hit. The GPDMA monitoring of a trigger for channel x is started when the channel is enabled/loaded with a new active trigger configuration: rising or falling edge on a selected trigger (TRIGPOL[1:0] = 01 or respectively TRIGPOL[1:0] = 10). The monitoring of this trigger is kept active during the triggered and uncompleted (data or link) transfer and if a new trigger is detected then, this hit is internally memorized to grant the next transfer, as long as the defined rising or falling edge is not modified, and the TRIGSEL[5:0] is not modified, and the channel is enabled. Transferring a next LLIn+1 that updates the GPDMA_CxTR2 with a new value for any of TRIGSEL[5:0] or TRIGPOL[1:0], resets the monitoring, trashing the memorized hit of the formerly defined LLIn trigger. After a first new trigger hitn+1 is memorized, if another second trigger hitn+2 is detected and if the hitn triggered transfer is still not completed, hitn+2 is lost and not memorized.memorized. A trigger overrun flag is reported (GPDMA_CxSR.TOF =1 ), and an interrupt is generated if enabled (GPDMA_CxCR.TOIE = 1). The channel is not automatically disabled by hardware due to a trigger overrun. Note: When the source block size is not a multiple of the source burst size and is a multiple of the source data width, then the last programmed source burst is not completed and is internally shorten to match the block size. In this case, if TRIGM[1:0] = 11 and (SWREQ =1 or (SWREQ = 0 and DREQ =0 )), the shortened burst transfer (by singles or/and by bursts of lower length) is conditioned once by the trigger. When the programmed destination burst is internally shortened by singles or/and by bursts of lower length (versus FIFO size, versus block size, 1-Kbyte boundary address crossing): if the trigger is conditioning the programmed destination burst (if TRIGM[1:0] = 11 and SWREQ = 0 and DREQ = 1), this shortened destination burst transfer is conditioned once by the trigger.
bits : 14 - 15 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at block level: the first burst read of each block transfer is conditioned by one hit trigger (channel x = 12 to 15, for each block if a 2D/repeated block is configured with GPDMA_CxBR1.BRC[10:0] ≠ 0).
0x1 : B_0x1
channel x = 0 to 11, same as 00 channel x=12 to 15, at 2D/repeated block level, the
0x2 : B_0x2
at link level: a LLI link transfer is conditioned by one hit trigger. The LLI data transfer (if any) is not conditioned.
0x3 : B_0x3
at programmed burst level: If SWREQ = 1, each programmed burst read is conditioned by one hit trigger. If SWREQ = 0, each programmed burst that is requested by the selected peripheral, is conditioned by one hit trigger.
End of enumeration elements list.
TRIGSEL : trigger event input selection These bits select the trigger event input of the GPDMA transfer (as per ), with an active trigger event if TRIGPOL[1:0] ≠ 00.
bits : 16 - 21 (6 bit)
access : read-write
TRIGPOL : trigger event polarity These bits define the polarity of the selected trigger event input defined by TRIGSEL[5:0].
bits : 24 - 25 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no trigger (masked trigger event)
0x1 : B_0x1
trigger on the rising edge
0x2 : B_0x2
trigger on the falling edge
0x3 : B_0x3
same as 00
End of enumeration elements list.
TCEM : transfer complete event mode These bits define the transfer granularity for the transfer complete and half transfer complete events generation. Note: If the initial LLI0 data transfer is null/void (directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] = 0), then neither the complete transfer event nor the half transfer event is generated. Note: If the initial LLI0 data transfer is null/void (directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] = 0), then neither the complete transfer event nor the half transfer event is generated. Note: If the initial LLI0 data transfer is null/void (i.e. directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] =0 ), then the half transfer event is not generated, and the transfer complete event is generated when is completed the loading of the LLI1.
bits : 30 - 31 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at block level (when GPDMA_CxBR1.BNDT[15:0] = 0): the complete (and the half) transfer event is generated at the (respectively half of the) end of a block.
0x1 : B_0x1
channel x = 0 to 11, same as 00 channel x=12 to 15, at 2D/repeated block level (when GPDMA_CxBR1.BRC[10:0] = 0 and GPDMA_CxBR1.BNDT[15:0] = 0), the complete (and the half) transfer event is generated at the end (respectively half of the end) of the 2D/repeated block.
0x2 : B_0x2
at LLI level: the complete transfer event is generated at the end of the LLI transfer, including the update of the LLI if any. The half transfer event is generated at the half of the LLI data transfer (the LLI data transfer being a block transfer or a 2D/repeated block transfer for channel x = 12 to 15), if any data transfer.
0x3 : B_0x3
at channel level: the complete transfer event is generated at the end of the last LLI transfer. The half transfer event is generated at the half of the data transfer of the last LLI. The last LLI updates the link address GPDMA_CxLLR.LA[15:2] to zero and clears all the GPDMA_CxLLR update bits (UT1, UT2, UB1, USA, UDA and ULL, plus UT3 and UB2 if present). If the channel transfer is continuous/infinite, no event is generated.
End of enumeration elements list.
GPDMA channel 2 block register 1
address_offset : 0x198 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
BNDT : block number of data bytes to transfer from the source Block size transferred from the source. When the channel is enabled, this field becomes read-only and is decremented, indicating the remaining number of data items in the current source block to be transferred. BNDT[15:0] is programmed in number of bytes, maximum source block size is 64 Kbytes -1. Once the last data transfer is completed (BNDT[15:0] = 0): - if GPDMA_CxLLR.UB1 = 1, this field is updated by the LLI in the memory. - if GPDMA_CxLLR.UB1 = 0 and if there is at least one non null Uxx update bit, this field is internally restored to the programmed value. - if all GPDMA_CxLLR.Uxx = 0 and if GPDMA_CxLLR.LA[15:0] = 0, this field is internally restored to the programmed value (infinite/continuous last LLI). - if GPDMA_CxLLR = 0, this field is kept as zero following the last LLI data transfer. Note: A non-null source block size must be a multiple of the source data width (BNDT[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued. When configured in packing mode (GPDMA_CxTR1.PAM[1] = 1 and destination data width different from source data width), a non-null source block size must be a multiple of the destination data width (BNDT[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued.
bits : 0 - 15 (16 bit)
access : read-write
GPDMA channel 2 source address register
address_offset : 0x19C Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SA : source address This field is the pointer to the address from which the next data is read. During the channel activity, depending on the source addressing mode (GPDMA_CxTR1.SINC), this field is kept fixed or incremented by the data width (GPDMA_CxTR1.SDW_LOG2[1:0]) after each single source data, reflecting the next address from which data is read. During the channel activity, this address is updated after each completed source burst, consequently to: the programmed source burst either in fixed addressing mode or in contiguous-data incremented mode. If contiguously incremented (GPDMA_CxTR1.SINC = 1), then the additional address offset value is the programmed burst size, as defined by GPDMA_CxTR1.SBL_1[5:0] and GPDMA_CxTR1.SDW_LOG2[21:0] the additional source incremented/decremented offset value as programmed by GPDMA_CxBR1.SDEC and GPDMA_CxTR3.SAO[12:0] once/if completed source block transfer, for a channel x with 2D addressing capability (x = 12 to 15). additional block repeat source incremented/decremented offset value as programmed by GPDMA_CxBR1.BRSDEC and GPDMA_CxBR2.BRSAO[15:0] In linked-list mode, after a LLI data transfer is completed, this register is automatically updated by GPDMA from the memory, provided the LLI is set with GPDMA_CxLLR.USA = 1. Note: A source address must be aligned with the programmed data width of a source single (SA[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued. When the source block size is not a multiple of the source burst size and is a multiple of the source data width, the last programmed source burst is not completed and is internally shorten to match the block size. In this case, the additional GPDMA_CxTR3.SAO[12:0] is not applied.
bits : 0 - 31 (32 bit)
access : read-write
GPDMA channel 2 destination address register
address_offset : 0x1A0 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
DA : destination address This field is the pointer to the address from which the next data is written. During the channel activity, depending on the destination addressing mode (GPDMA_CxTR1.DINC), this field is kept fixed or incremented by the data width (GPDMA_CxTR1.DDW_LOG2[21:0]) after each single destination data, reflecting the next address from which data is written. During the channel activity, this address is updated after each completed destination burst, consequently to: the programmed destination burst either in fixed addressing mode or in contiguous-data incremented mode. If contiguously incremented (GPDMA_CxTR1.DINC = 1), then the additional address offset value is the programmed burst size, as defined by GPDMA_CxTR1.DBL_1[5:0] and GPDMA_CxTR1.DDW_LOG2[1:0] the additional destination incremented/decremented offset value as programmed by GPDMA_CxBR1.DDEC and GPDMA_CxTR3.DAO[12:0] once/if completed destination block transfer, for a channel x with 2D addressing capability (x = 12 to 15), the additional block repeat destination incremented/decremented offset value as programmed by GPDMA_CxBR1.BRDDEC and GPDMA_CxBR2.BRDAO[15:0] In linked-list mode, after a LLI data transfer is completed, this register is automatically updated by the GPDMA from the memory, provided the LLI is set with GPDMA_CxLLR.UDA = 1. Note: A destination address must be aligned with the programmed data width of a destination burst (DA[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued.
bits : 0 - 31 (32 bit)
access : read-write
GPDMA channel 2 linked-list address register
address_offset : 0x1CC Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
LA : pointer (16-bit low-significant address) to the next linked-list data structure If UT1 = UT2 = UB1 = USA = UDA = ULL = 0 and if LA[15:20] = 0, the current LLI is the last one. The channel transfer is completed without any update of the linked-list GPDMA register file. Else, this field is the pointer to the memory address offset from which the next linked-list data structure is automatically fetched from, once the data transfer is completed, in order to conditionally update the linked-list GPDMA internal register file (GPDMA_CxCTR1, GPDMA_CxTR2, GPDMA_CxBR1, GPDMA_CxSAR, GPDMA_CxDAR and GPDMA_CxLLR). Note: The user must program the pointer to be 32-bit aligned. The two low-significant bits are write ignored.
bits : 2 - 15 (14 bit)
access : read-write
ULL : Update GPDMA_CxLLR register from memory This bit is used to control the update of GPDMA_CxLLR from the memory during the link transfer.
bits : 16 - 16 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxLLR update
0x1 : B_0x1
GPDMA_CxLLR update
End of enumeration elements list.
UDA : Update GPDMA_CxDAR register from memory This bit is used to control the update of GPDMA_CxDAR from the memory during the link transfer.
bits : 27 - 27 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxDAR update
0x1 : B_0x1
GPDMA_CxDAR update
End of enumeration elements list.
USA : update GPDMA_CxSAR from memory This bit controls the update of GPDMA_CxSAR from the memory during the link transfer.
bits : 28 - 28 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxSAR update
0x1 : B_0x1
GPDMA_CxSAR update
End of enumeration elements list.
UB1 : Update GPDMA_CxBR1 from memory This bit controls the update of GPDMA_CxBR1 from the memory during the link transfer. If UB1 = 0 and if GPDMA_CxLLR ≠ 0, the linked-list is not completed. GPDMA_CxBR1.BNDT[15:0] is then restored to the programmed value after data transfer is completed and before the link transfer.
bits : 29 - 29 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxBR1 update from memory (GPDMA_CxBR1.BNDT[15:0] restored if any link transfer)
0x1 : B_0x1
GPDMA_CxBR1 update
End of enumeration elements list.
UT2 : Update GPDMA_CxTR2 from memory This bit controls the update of GPDMA_CxTR2 from the memory during the link transfer.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR2 update
0x1 : B_0x1
GPDMA_CxTR2 update
End of enumeration elements list.
UT1 : Update GPDMA_CxTR1 from memory This bit controls the update of GPDMA_CxTR1 from the memory during the link transfer.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR1 update
0x1 : B_0x1
GPDMA_CxTR1 update
End of enumeration elements list.
GPDMA channel 3 linked-list base address register
address_offset : 0x1D0 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
LBA : linked-list base address of GPDMA channel x
bits : 16 - 31 (16 bit)
access : read-write
GPDMA channel 3 flag clear register
address_offset : 0x1DC Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
TCF : transfer complete flag clear
bits : 8 - 8 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding TCF flag cleared
End of enumeration elements list.
HTF : half transfer flag clear
bits : 9 - 9 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding HTF flag cleared
End of enumeration elements list.
DTEF : data transfer error flag clear
bits : 10 - 10 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding DTEF flag cleared
End of enumeration elements list.
ULEF : update link transfer error flag clear
bits : 11 - 11 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding ULEF flag cleared
End of enumeration elements list.
USEF : user setting error flag clear
bits : 12 - 12 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding USEF flag cleared
End of enumeration elements list.
SUSPF : completed suspension flag clear
bits : 13 - 13 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding SUSPF flag cleared
End of enumeration elements list.
TOF : trigger overrun flag clear
bits : 14 - 14 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding TOF flag cleared
End of enumeration elements list.
GPDMA channel 3 status register
address_offset : 0x1E0 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
IDLEF : idle flag This idle flag is de-asserted by hardware when the channel is enabled (GPDMA_CxCR.EN = 1) with a valid channel configuration (no USEF to be immediately reported). This idle flag is asserted after hard reset or by hardware when the channel is back in idle state (in suspended or disabled state).
bits : 0 - 0 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
channel not in idle state
0x1 : B_0x1
channel in idle state
End of enumeration elements list.
TCF : transfer complete flag A transfer complete event is either a block transfer complete, a 2D/repeated block transfer complete, a LLI transfer complete including the upload of the next LLI if any, or the full linked-list completion, depending on the transfer complete event mode (GPDMA_CxTR2.TCEM[1:0]).
bits : 8 - 8 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no transfer complete event
0x1 : B_0x1
a transfer complete event occurred
End of enumeration elements list.
HTF : half transfer flag An half transfer event is either an half block transfer or an half 2D/repeated block transfer, depending on the transfer complete event mode (GPDMA_CxTR2.TCEM[1:0]). An half block transfer occurs when half of the bytes of the source block size (rounded up integer of GPDMA_CxBR1.BNDT[15:0]/2) has been transferred to the destination. An half 2D/repeated block transfer occurs when half of the repeated blocks (rounded up integer of (GPDMA_CxBR1.BRC[10:0]+1)/2)) has been transferred to the destination.
bits : 9 - 9 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no half transfer event
0x1 : B_0x1
an half transfer event occurred
End of enumeration elements list.
DTEF : data transfer error flag
bits : 10 - 10 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no data transfer error event
0x1 : B_0x1
a master bus error event occurred on a data transfer
End of enumeration elements list.
ULEF : update link transfer error flag
bits : 11 - 11 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no update link transfer error event
0x1 : B_0x1
a master bus error event occurred while updating a linked-list register from memory
End of enumeration elements list.
USEF : user setting error flag
bits : 12 - 12 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no user setting error event
0x1 : B_0x1
a user setting error event occurred
End of enumeration elements list.
SUSPF : completed suspension flag
bits : 13 - 13 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no completed suspension event
0x1 : B_0x1
a completed suspension event occurred
End of enumeration elements list.
TOF : trigger overrun flag
bits : 14 - 14 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no trigger overrun event
0x1 : B_0x1
a trigger overrun event occurred
End of enumeration elements list.
FIFOL : monitored FIFO level Number of available write beats in the FIFO, in units of the programmed destination data width (see GPDMA_CxTR1.DDW_LOG2[1:0], in units of bytes, half-words, or words). Note: After having suspended an active transfer, the user may need to read FIFOL[7:0], additionally to GPDMA_CxBR1.BDNT[15:0] and GPDMA_CxBR1.BRC[10:0], to know how many data have been transferred to the destination. Before reading, the user may wait for the transfer to be suspended (GPDMA_CxSR.SUSPF = 1).
bits : 16 - 23 (8 bit)
access : read-only
GPDMA channel 3 control register
address_offset : 0x1E4 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
EN : enable Writing 1 into the field RESET (bit 1) causes the hardware to de-assert this bit, whatever is written into this bit 0. Else: this bit is de-asserted by hardware when there is a transfer error (master bus error or user setting error) or when there is a channel transfer complete (channel ready to be configured, e.g. if LSM=1 at the end of a single execution of the LLI). Else, this bit can be asserted by software. Writing 0 into this EN bit is ignored.
bits : 0 - 0 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
write: ignored, read: channel disabled
0x1 : B_0x1
write: enable channel, read: channel enabled
End of enumeration elements list.
RESET : reset This bit is write only. Writing 0 has no impact. Writing 1 implies the reset of the following: the FIFO, the channel internal state, SUSP and EN bits (whatever is written receptively in bit 2 and bit 0). The reset is effective when the channel is in steady state, meaning one of the following: - active channel in suspended state (GPDMA_CxSR.SUSPF = 1 and GPDMA_CxSR.IDLEF = GPDMA_CxCR.EN = 1) - channel in disabled state (GPDMA_CxSR.IDLEF = 1 and GPDMA_CxCR.EN = 0). After writing a RESET, to continue using this channel, the user must explicitly reconfigure the channel including the hardware-modified configuration registers (GPDMA_CxBR1, GPDMA_CxSAR and GPDMA_CxDAR) before enabling again the channel (see the programming sequence in ).
bits : 1 - 1 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no channel reset
0x1 : B_0x1
channel reset
End of enumeration elements list.
SUSP : suspend Writing 1 into the field RESET (bit 1) causes the hardware to de-assert this bit, whatever is written into this bit 2. Else: Software must write 1 in order to suspend an active channel i.e. a channel with an on-going GPDMA transfer over its master ports. The software must write 0 in order to resume a suspended channel, following the programming sequence detailed in .
bits : 2 - 2 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
write: resume channel, read: channel not suspended
0x1 : B_0x1
write: suspend channel, read: channel suspended.
End of enumeration elements list.
TCIE : transfer complete interrupt enable
bits : 8 - 8 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
HTIE : half transfer complete interrupt enable
bits : 9 - 9 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
DTEIE : data transfer error interrupt enable
bits : 10 - 10 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
ULEIE : update link transfer error interrupt enable
bits : 11 - 11 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
USEIE : user setting error interrupt enable
bits : 12 - 12 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
SUSPIE : completed suspension interrupt enable
bits : 13 - 13 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
TOIE : trigger overrun interrupt enable
bits : 14 - 14 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
LSM : Link step mode First the (possible 1D/repeated) block transfer is executed as defined by the current internal register file until GPDMA_CxBR1.BNDT[15:0] = 0 and GPDMA_CxBR1.BRC[10:0] = 0 if present. Secondly the next linked-list data structure is conditionally uploaded from memory as defined by GPDMA_CxLLR. Then channel execution is completed. Note: This bit must be written when EN=0. This bit is read-only when EN=1.
bits : 16 - 16 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
channel executed for the full linked-list and completed at the end of the last LLI (GPDMA_CxLLR = 0). The 16 low-significant bits of the link address are null (LA[15:0] = 0) and all the update bits are null (UT1 =UB1 = UT2 = USA = UDA = ULL = 0 and UT3 = UB2 = 0 if present). Then GPDMA_CxBR1.BNDT[15:0] = 0 and GPDMA_CxBR1.BRC[10:0] = 0 if present.
0x1 : B_0x1
channel executed once for the current LLI
End of enumeration elements list.
LAP : linked-list allocated port This bit is used to allocate the master port for the update of the GPDMA linked-list registers from the memory. Note: This bit must be written when EN=0. This bit is read-only when EN=1.
bits : 17 - 17 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
PRIO : priority level of the channel x GPDMA transfer versus others Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 22 - 23 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
low priority, low weight
0x1 : B_0x1
low priority, mid weight
0x2 : B_0x2
low priority, high weight
0x3 : B_0x3
high priority
End of enumeration elements list.
GPDMA channel 3 transfer register 1
address_offset : 0x210 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SDW_LOG2 : binary logarithm of the source data width of a burst in bytes Note: Setting a 8-byte data width causes a user setting error to be reported and no transfer is issued. A source block size must be a multiple of the source data width (GPDMA_CxBR1.BNDT[2:0] versus SDW_LOG2[1:0]). Otherwise, a user setting error is reported and no transfer is issued. A source single transfer must have an aligned address with its data width (start address GPDMA_CxSAR[2:0] versus SDW_LOG2[1:0]). Otherwise, a user setting error is reported and none transfer is issued.
bits : 0 - 1 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
byte
0x1 : B_0x1
half-word (2 bytes)
0x2 : B_0x2
word (4 bytes)
0x3 : B_0x3
user setting error reported and no transfer issued
End of enumeration elements list.
SINC : source incrementing burst The source address, pointed by GPDMA_CxSAR, is kept constant after a burst beat/single transfer or is incremented by the offset value corresponding to a contiguous data after a burst beat/single transfer.
bits : 3 - 3 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
fixed burst
0x1 : B_0x1
contiguously incremented burst
End of enumeration elements list.
SBL_1 : source burst length minus 1, between 0 and 63 The burst length unit is one data named beat within a burst. If SBL_1[5:0] =0 , the burst can be named as single. Each data/beat has a width defined by the destination data width SDW_LOG2[1:0]. Note: If a burst transfer crossed a 1-Kbyte address boundary on a AHB transfer, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the AHB protocol. If a burst transfer is of length greater than the FIFO size of the channel x, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the FIFO size. Transfer performance is lower, with GPDMA re-arbitration between effective and lower bursts/singles, but the data integrity is guaranteed.
bits : 4 - 9 (6 bit)
access : read-write
PAM : padding/alignment mode If DDW_LOG2[1:0] = SDW_LOG2[1:0]: if the data width of a burst destination transfer is equal to the data width of a burst source transfer, these bits are ignored. Else: - Case 1: If destination data width > source data width 1x: successive source data are FIFO queued and packed at the destination data width, in a left (LSB) to right (MSB) order (named little endian), before a destination transfer - Case 2: If destination data width < source data width 1x: source data is FIFO queued and unpacked at the destination data width, to be transferred in a left (LSB) to right (MSB) order (named little endian) to the destination Note:
bits : 11 - 12 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
source data is transferred as right aligned, left-truncated down to the destination data width
0x1 : B_0x1
source data is transferred as left-aligned, right-truncated down to the destination data width
0x0 : B_0x0
source data is transferred as right aligned, left-truncated down to the destination data width
0x1 : B_0x1
source data is transferred as left-aligned, right-truncated down to the destination data width
End of enumeration elements list.
SBX : source byte exchange within the unaligned half-word of each source word If the source data width is shorter than a word, this bit is ignored. If the source data width is a word:
bits : 13 - 13 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no byte-based exchange within the unaligned half-word of each source word
0x1 : B_0x1
the two consecutive bytes within the unaligned half-word of each source word are exchanged.
End of enumeration elements list.
SAP : source allocated port This bit is used to allocate the master port for the source transfer Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 14 - 14 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
SSEC : security attribute of the GPDMA transfer from the source If GPDMA_SECCFGR.SECx = 1 and the access is secure: This is a secure register bit. This bit can only be read by a secure software. This bit must be written by a secure software when GPDMA_SECCFGR.SECx =1 . A secure write is ignored when GPDMA_SECCFGR.SECx = 0. When GPDMA_SECCFGR.SECx is de-asserted, this SSEC bit is also de-asserted by hardware (on a secure reconfiguration of the channel as non-secure), and the GPDMA transfer from the source is non-secure.
bits : 15 - 15 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
GPDMA transfer non-secure
0x1 : B_0x1
GPDMA transfer secure
End of enumeration elements list.
DDW_LOG2 : binary logarithm of the destination data width of a burst, in bytes Note: Setting a 8-byte data width causes a user setting error to be reported and none transfer is issued. A destination burst transfer must have an aligned address with its data width (start address GPDMA_CxDAR[2:0] and address offset GPDMA_CxTR3.DAO[2:0], versus DDW_LOG2[1:0]). Otherwise a user setting error is reported and no transfer is issued.
bits : 16 - 17 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
byte
0x1 : B_0x1
half-word (2 bytes)
0x2 : B_0x2
word (4 bytes)
0x3 : B_0x3
user setting error reported and no transfer issued
End of enumeration elements list.
DINC : destination incrementing burst The destination address, pointed by GPDMA_CxDAR, is kept constant after a burst beat/single transfer, or is incremented by the offset value corresponding to a contiguous data after a burst beat/single transfer.
bits : 19 - 19 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
fixed burst
0x1 : B_0x1
contiguously incremented burst
End of enumeration elements list.
DBL_1 : destination burst length minus 1, between 0 and 63 The burst length unit is one data named beat within a burst. If DBL_1[5:0] =0 , the burst can be named as single. Each data/beat has a width defined by the destination data width DDW_LOG2[1:0]. Note: If a burst transfer crossed a 1-Kbyte address boundary on a AHB transfer, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the AHB protocol. If a burst transfer is of length greater than the FIFO size of the channel x, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the FIFO size. Transfer performance is lower, with GPDMA re-arbitration between effective and lower bursts/singles, but the data integrity is guaranteed.
bits : 20 - 25 (6 bit)
access : read-write
DBX : destination byte exchange If the destination data size is a byte, this bit is ignored. If the destination data size is not a byte:
bits : 26 - 26 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no byte-based exchange within half-word
0x1 : B_0x1
the two consecutive (post PAM) bytes are exchanged in each destination half-word.
End of enumeration elements list.
DHX : destination half-word exchange If the destination data size is shorter than a word, this bit is ignored. If the destination data size is a word:
bits : 27 - 27 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no halfword-based exchanged within word
0x1 : B_0x1
the two consecutive (post PAM) half-words are exchanged in each destination word.
End of enumeration elements list.
DAP : destination allocated port This bit is used to allocate the master port for the destination transfer Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
DSEC : security attribute of the GPDMA transfer to the destination If GPDMA_SECCFGR.SECx = 1 and the access is secure: This is a secure register bit. This bit can only be read by a secure software. This bit must be written by a secure software when GPDMA_SECCFGR.SECx = 1. A secure write is ignored when GPDMA_SECCFGR.SECx = 0. When GPDMA_SECCFGR.SECx is de-asserted, this DSEC bit is also de-asserted by hardware (on a secure reconfiguration of the channel as non-secure), and the GPDMA transfer to the destination is non-secure.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
GPDMA transfer non-secure
0x1 : B_0x1
GPDMA transfer secure
End of enumeration elements list.
GPDMA channel 3 transfer register 2
address_offset : 0x214 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
REQSEL : GPDMA hardware request selection These bits are ignored if channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer). Else, the selected hardware request is internally taken into account as per . The user must not assign a same input hardware request (same REQSEL[6:0] value) to different active GPDMA channels (GPDMA_CxCR.EN = 1 and GPDMA_CxTR2.SWREQ = 0 for these channels). GPDMA is not intended to hardware support the case of simultaneous enabled channels incorrectly configured with a same hardware peripheral request signal, and there is no user setting error reporting.
bits : 0 - 6 (7 bit)
access : read-write
SWREQ : software request This bit is internally taken into account when GPDMA_CxCR.EN is asserted.
bits : 9 - 9 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no software request. The selected hardware request REQSEL[6:0] is taken into account.
0x1 : B_0x1
software request for a memory-to-memory transfer. The default selected hardware request as per REQSEL[6:0] is ignored.
End of enumeration elements list.
DREQ : destination hardware request This bit is ignored if channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer). Else: Note:
bits : 10 - 10 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
selected hardware request driven by a source peripheral (request signal taken into account by the GPDMA transfer scheduler over the source/read port)
0x1 : B_0x1
selected hardware request driven by a destination peripheral (request signal taken into account by the GPDMA transfer scheduler over the destination/write port)
End of enumeration elements list.
BREQ : Block hardware request If the channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer), this bit is ignored. Else:
bits : 11 - 11 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
the selected hardware request is driven by a peripheral with a hardware request/acknowledge protocol at a burst level.
0x1 : B_0x1
the selected hardware request is driven by a peripheral with a hardware request/acknowledge protocol at a block level (see ).
End of enumeration elements list.
TRIGM : trigger mode These bits define the transfer granularity for its conditioning by the trigger. If the channel x is enabled (GPDMA_CxCR.EN asserted) with TRIGPOL[1:0] = 00 or 11, these TRIGM[1:0] bits are ignored. Else, a GPDMA transfer is conditioned by at least one trigger hit: first burst read of a 2D/repeated block transfer is conditioned by one hit trigger. – If the peripheral is programmed as a source (DREQ = 0) of the LLI data transfer, each programmed burst read is conditioned. – If the peripheral is programmed as a destination (DREQ = 1) of the LLI data transfer, each programmed burst write is conditioned. The first memory burst read of a (possibly 2D/repeated) block, also named as the first ready FIFO-based source burst, is gated by the occurrence of both the hardware request and the first trigger hit. The GPDMA monitoring of a trigger for channel x is started when the channel is enabled/loaded with a new active trigger configuration: rising or falling edge on a selected trigger (TRIGPOL[1:0] = 01 or respectively TRIGPOL[1:0] = 10). The monitoring of this trigger is kept active during the triggered and uncompleted (data or link) transfer and if a new trigger is detected then, this hit is internally memorized to grant the next transfer, as long as the defined rising or falling edge is not modified, and the TRIGSEL[5:0] is not modified, and the channel is enabled. Transferring a next LLIn+1 that updates the GPDMA_CxTR2 with a new value for any of TRIGSEL[5:0] or TRIGPOL[1:0], resets the monitoring, trashing the memorized hit of the formerly defined LLIn trigger. After a first new trigger hitn+1 is memorized, if another second trigger hitn+2 is detected and if the hitn triggered transfer is still not completed, hitn+2 is lost and not memorized.memorized. A trigger overrun flag is reported (GPDMA_CxSR.TOF =1 ), and an interrupt is generated if enabled (GPDMA_CxCR.TOIE = 1). The channel is not automatically disabled by hardware due to a trigger overrun. Note: When the source block size is not a multiple of the source burst size and is a multiple of the source data width, then the last programmed source burst is not completed and is internally shorten to match the block size. In this case, if TRIGM[1:0] = 11 and (SWREQ =1 or (SWREQ = 0 and DREQ =0 )), the shortened burst transfer (by singles or/and by bursts of lower length) is conditioned once by the trigger. When the programmed destination burst is internally shortened by singles or/and by bursts of lower length (versus FIFO size, versus block size, 1-Kbyte boundary address crossing): if the trigger is conditioning the programmed destination burst (if TRIGM[1:0] = 11 and SWREQ = 0 and DREQ = 1), this shortened destination burst transfer is conditioned once by the trigger.
bits : 14 - 15 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at block level: the first burst read of each block transfer is conditioned by one hit trigger (channel x = 12 to 15, for each block if a 2D/repeated block is configured with GPDMA_CxBR1.BRC[10:0] ≠ 0).
0x1 : B_0x1
channel x = 0 to 11, same as 00 channel x=12 to 15, at 2D/repeated block level, the
0x2 : B_0x2
at link level: a LLI link transfer is conditioned by one hit trigger. The LLI data transfer (if any) is not conditioned.
0x3 : B_0x3
at programmed burst level: If SWREQ = 1, each programmed burst read is conditioned by one hit trigger. If SWREQ = 0, each programmed burst that is requested by the selected peripheral, is conditioned by one hit trigger.
End of enumeration elements list.
TRIGSEL : trigger event input selection These bits select the trigger event input of the GPDMA transfer (as per ), with an active trigger event if TRIGPOL[1:0] ≠ 00.
bits : 16 - 21 (6 bit)
access : read-write
TRIGPOL : trigger event polarity These bits define the polarity of the selected trigger event input defined by TRIGSEL[5:0].
bits : 24 - 25 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no trigger (masked trigger event)
0x1 : B_0x1
trigger on the rising edge
0x2 : B_0x2
trigger on the falling edge
0x3 : B_0x3
same as 00
End of enumeration elements list.
TCEM : transfer complete event mode These bits define the transfer granularity for the transfer complete and half transfer complete events generation. Note: If the initial LLI0 data transfer is null/void (directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] = 0), then neither the complete transfer event nor the half transfer event is generated. Note: If the initial LLI0 data transfer is null/void (directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] = 0), then neither the complete transfer event nor the half transfer event is generated. Note: If the initial LLI0 data transfer is null/void (i.e. directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] =0 ), then the half transfer event is not generated, and the transfer complete event is generated when is completed the loading of the LLI1.
bits : 30 - 31 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at block level (when GPDMA_CxBR1.BNDT[15:0] = 0): the complete (and the half) transfer event is generated at the (respectively half of the) end of a block.
0x1 : B_0x1
channel x = 0 to 11, same as 00 channel x=12 to 15, at 2D/repeated block level (when GPDMA_CxBR1.BRC[10:0] = 0 and GPDMA_CxBR1.BNDT[15:0] = 0), the complete (and the half) transfer event is generated at the end (respectively half of the end) of the 2D/repeated block.
0x2 : B_0x2
at LLI level: the complete transfer event is generated at the end of the LLI transfer, including the update of the LLI if any. The half transfer event is generated at the half of the LLI data transfer (the LLI data transfer being a block transfer or a 2D/repeated block transfer for channel x = 12 to 15), if any data transfer.
0x3 : B_0x3
at channel level: the complete transfer event is generated at the end of the last LLI transfer. The half transfer event is generated at the half of the data transfer of the last LLI. The last LLI updates the link address GPDMA_CxLLR.LA[15:2] to zero and clears all the GPDMA_CxLLR update bits (UT1, UT2, UB1, USA, UDA and ULL, plus UT3 and UB2 if present). If the channel transfer is continuous/infinite, no event is generated.
End of enumeration elements list.
GPDMA channel 3 block register 1
address_offset : 0x218 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
BNDT : block number of data bytes to transfer from the source Block size transferred from the source. When the channel is enabled, this field becomes read-only and is decremented, indicating the remaining number of data items in the current source block to be transferred. BNDT[15:0] is programmed in number of bytes, maximum source block size is 64 Kbytes -1. Once the last data transfer is completed (BNDT[15:0] = 0): - if GPDMA_CxLLR.UB1 = 1, this field is updated by the LLI in the memory. - if GPDMA_CxLLR.UB1 = 0 and if there is at least one non null Uxx update bit, this field is internally restored to the programmed value. - if all GPDMA_CxLLR.Uxx = 0 and if GPDMA_CxLLR.LA[15:0] = 0, this field is internally restored to the programmed value (infinite/continuous last LLI). - if GPDMA_CxLLR = 0, this field is kept as zero following the last LLI data transfer. Note: A non-null source block size must be a multiple of the source data width (BNDT[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued. When configured in packing mode (GPDMA_CxTR1.PAM[1] = 1 and destination data width different from source data width), a non-null source block size must be a multiple of the destination data width (BNDT[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued.
bits : 0 - 15 (16 bit)
access : read-write
GPDMA channel 3 source address register
address_offset : 0x21C Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SA : source address This field is the pointer to the address from which the next data is read. During the channel activity, depending on the source addressing mode (GPDMA_CxTR1.SINC), this field is kept fixed or incremented by the data width (GPDMA_CxTR1.SDW_LOG2[1:0]) after each single source data, reflecting the next address from which data is read. During the channel activity, this address is updated after each completed source burst, consequently to: the programmed source burst either in fixed addressing mode or in contiguous-data incremented mode. If contiguously incremented (GPDMA_CxTR1.SINC = 1), then the additional address offset value is the programmed burst size, as defined by GPDMA_CxTR1.SBL_1[5:0] and GPDMA_CxTR1.SDW_LOG2[21:0] the additional source incremented/decremented offset value as programmed by GPDMA_CxBR1.SDEC and GPDMA_CxTR3.SAO[12:0] once/if completed source block transfer, for a channel x with 2D addressing capability (x = 12 to 15). additional block repeat source incremented/decremented offset value as programmed by GPDMA_CxBR1.BRSDEC and GPDMA_CxBR2.BRSAO[15:0] In linked-list mode, after a LLI data transfer is completed, this register is automatically updated by GPDMA from the memory, provided the LLI is set with GPDMA_CxLLR.USA = 1. Note: A source address must be aligned with the programmed data width of a source single (SA[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued. When the source block size is not a multiple of the source burst size and is a multiple of the source data width, the last programmed source burst is not completed and is internally shorten to match the block size. In this case, the additional GPDMA_CxTR3.SAO[12:0] is not applied.
bits : 0 - 31 (32 bit)
access : read-write
GPDMA channel 3 destination address register
address_offset : 0x220 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
DA : destination address This field is the pointer to the address from which the next data is written. During the channel activity, depending on the destination addressing mode (GPDMA_CxTR1.DINC), this field is kept fixed or incremented by the data width (GPDMA_CxTR1.DDW_LOG2[21:0]) after each single destination data, reflecting the next address from which data is written. During the channel activity, this address is updated after each completed destination burst, consequently to: the programmed destination burst either in fixed addressing mode or in contiguous-data incremented mode. If contiguously incremented (GPDMA_CxTR1.DINC = 1), then the additional address offset value is the programmed burst size, as defined by GPDMA_CxTR1.DBL_1[5:0] and GPDMA_CxTR1.DDW_LOG2[1:0] the additional destination incremented/decremented offset value as programmed by GPDMA_CxBR1.DDEC and GPDMA_CxTR3.DAO[12:0] once/if completed destination block transfer, for a channel x with 2D addressing capability (x = 12 to 15), the additional block repeat destination incremented/decremented offset value as programmed by GPDMA_CxBR1.BRDDEC and GPDMA_CxBR2.BRDAO[15:0] In linked-list mode, after a LLI data transfer is completed, this register is automatically updated by the GPDMA from the memory, provided the LLI is set with GPDMA_CxLLR.UDA = 1. Note: A destination address must be aligned with the programmed data width of a destination burst (DA[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued.
bits : 0 - 31 (32 bit)
access : read-write
GPDMA channel 3 linked-list address register
address_offset : 0x24C Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
LA : pointer (16-bit low-significant address) to the next linked-list data structure If UT1 = UT2 = UB1 = USA = UDA = ULL = 0 and if LA[15:20] = 0, the current LLI is the last one. The channel transfer is completed without any update of the linked-list GPDMA register file. Else, this field is the pointer to the memory address offset from which the next linked-list data structure is automatically fetched from, once the data transfer is completed, in order to conditionally update the linked-list GPDMA internal register file (GPDMA_CxCTR1, GPDMA_CxTR2, GPDMA_CxBR1, GPDMA_CxSAR, GPDMA_CxDAR and GPDMA_CxLLR). Note: The user must program the pointer to be 32-bit aligned. The two low-significant bits are write ignored.
bits : 2 - 15 (14 bit)
access : read-write
ULL : Update GPDMA_CxLLR register from memory This bit is used to control the update of GPDMA_CxLLR from the memory during the link transfer.
bits : 16 - 16 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxLLR update
0x1 : B_0x1
GPDMA_CxLLR update
End of enumeration elements list.
UDA : Update GPDMA_CxDAR register from memory This bit is used to control the update of GPDMA_CxDAR from the memory during the link transfer.
bits : 27 - 27 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxDAR update
0x1 : B_0x1
GPDMA_CxDAR update
End of enumeration elements list.
USA : update GPDMA_CxSAR from memory This bit controls the update of GPDMA_CxSAR from the memory during the link transfer.
bits : 28 - 28 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxSAR update
0x1 : B_0x1
GPDMA_CxSAR update
End of enumeration elements list.
UB1 : Update GPDMA_CxBR1 from memory This bit controls the update of GPDMA_CxBR1 from the memory during the link transfer. If UB1 = 0 and if GPDMA_CxLLR ≠ 0, the linked-list is not completed. GPDMA_CxBR1.BNDT[15:0] is then restored to the programmed value after data transfer is completed and before the link transfer.
bits : 29 - 29 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxBR1 update from memory (GPDMA_CxBR1.BNDT[15:0] restored if any link transfer)
0x1 : B_0x1
GPDMA_CxBR1 update
End of enumeration elements list.
UT2 : Update GPDMA_CxTR2 from memory This bit controls the update of GPDMA_CxTR2 from the memory during the link transfer.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR2 update
0x1 : B_0x1
GPDMA_CxTR2 update
End of enumeration elements list.
UT1 : Update GPDMA_CxTR1 from memory This bit controls the update of GPDMA_CxTR1 from the memory during the link transfer.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR1 update
0x1 : B_0x1
GPDMA_CxTR1 update
End of enumeration elements list.
GPDMA channel 4 linked-list base address register
address_offset : 0x250 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
LBA : linked-list base address of GPDMA channel x
bits : 16 - 31 (16 bit)
access : read-write
GPDMA channel 4 flag clear register
address_offset : 0x25C Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
TCF : transfer complete flag clear
bits : 8 - 8 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding TCF flag cleared
End of enumeration elements list.
HTF : half transfer flag clear
bits : 9 - 9 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding HTF flag cleared
End of enumeration elements list.
DTEF : data transfer error flag clear
bits : 10 - 10 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding DTEF flag cleared
End of enumeration elements list.
ULEF : update link transfer error flag clear
bits : 11 - 11 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding ULEF flag cleared
End of enumeration elements list.
USEF : user setting error flag clear
bits : 12 - 12 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding USEF flag cleared
End of enumeration elements list.
SUSPF : completed suspension flag clear
bits : 13 - 13 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding SUSPF flag cleared
End of enumeration elements list.
TOF : trigger overrun flag clear
bits : 14 - 14 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding TOF flag cleared
End of enumeration elements list.
GPDMA channel 4 status register
address_offset : 0x260 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
IDLEF : idle flag This idle flag is de-asserted by hardware when the channel is enabled (GPDMA_CxCR.EN = 1) with a valid channel configuration (no USEF to be immediately reported). This idle flag is asserted after hard reset or by hardware when the channel is back in idle state (in suspended or disabled state).
bits : 0 - 0 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
channel not in idle state
0x1 : B_0x1
channel in idle state
End of enumeration elements list.
TCF : transfer complete flag A transfer complete event is either a block transfer complete, a 2D/repeated block transfer complete, a LLI transfer complete including the upload of the next LLI if any, or the full linked-list completion, depending on the transfer complete event mode (GPDMA_CxTR2.TCEM[1:0]).
bits : 8 - 8 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no transfer complete event
0x1 : B_0x1
a transfer complete event occurred
End of enumeration elements list.
HTF : half transfer flag An half transfer event is either an half block transfer or an half 2D/repeated block transfer, depending on the transfer complete event mode (GPDMA_CxTR2.TCEM[1:0]). An half block transfer occurs when half of the bytes of the source block size (rounded up integer of GPDMA_CxBR1.BNDT[15:0]/2) has been transferred to the destination. An half 2D/repeated block transfer occurs when half of the repeated blocks (rounded up integer of (GPDMA_CxBR1.BRC[10:0]+1)/2)) has been transferred to the destination.
bits : 9 - 9 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no half transfer event
0x1 : B_0x1
an half transfer event occurred
End of enumeration elements list.
DTEF : data transfer error flag
bits : 10 - 10 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no data transfer error event
0x1 : B_0x1
a master bus error event occurred on a data transfer
End of enumeration elements list.
ULEF : update link transfer error flag
bits : 11 - 11 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no update link transfer error event
0x1 : B_0x1
a master bus error event occurred while updating a linked-list register from memory
End of enumeration elements list.
USEF : user setting error flag
bits : 12 - 12 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no user setting error event
0x1 : B_0x1
a user setting error event occurred
End of enumeration elements list.
SUSPF : completed suspension flag
bits : 13 - 13 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no completed suspension event
0x1 : B_0x1
a completed suspension event occurred
End of enumeration elements list.
TOF : trigger overrun flag
bits : 14 - 14 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no trigger overrun event
0x1 : B_0x1
a trigger overrun event occurred
End of enumeration elements list.
FIFOL : monitored FIFO level Number of available write beats in the FIFO, in units of the programmed destination data width (see GPDMA_CxTR1.DDW_LOG2[1:0], in units of bytes, half-words, or words). Note: After having suspended an active transfer, the user may need to read FIFOL[7:0], additionally to GPDMA_CxBR1.BDNT[15:0] and GPDMA_CxBR1.BRC[10:0], to know how many data have been transferred to the destination. Before reading, the user may wait for the transfer to be suspended (GPDMA_CxSR.SUSPF = 1).
bits : 16 - 23 (8 bit)
access : read-only
GPDMA channel 4 control register
address_offset : 0x264 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
EN : enable Writing 1 into the field RESET (bit 1) causes the hardware to de-assert this bit, whatever is written into this bit 0. Else: this bit is de-asserted by hardware when there is a transfer error (master bus error or user setting error) or when there is a channel transfer complete (channel ready to be configured, e.g. if LSM=1 at the end of a single execution of the LLI). Else, this bit can be asserted by software. Writing 0 into this EN bit is ignored.
bits : 0 - 0 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
write: ignored, read: channel disabled
0x1 : B_0x1
write: enable channel, read: channel enabled
End of enumeration elements list.
RESET : reset This bit is write only. Writing 0 has no impact. Writing 1 implies the reset of the following: the FIFO, the channel internal state, SUSP and EN bits (whatever is written receptively in bit 2 and bit 0). The reset is effective when the channel is in steady state, meaning one of the following: - active channel in suspended state (GPDMA_CxSR.SUSPF = 1 and GPDMA_CxSR.IDLEF = GPDMA_CxCR.EN = 1) - channel in disabled state (GPDMA_CxSR.IDLEF = 1 and GPDMA_CxCR.EN = 0). After writing a RESET, to continue using this channel, the user must explicitly reconfigure the channel including the hardware-modified configuration registers (GPDMA_CxBR1, GPDMA_CxSAR and GPDMA_CxDAR) before enabling again the channel (see the programming sequence in ).
bits : 1 - 1 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no channel reset
0x1 : B_0x1
channel reset
End of enumeration elements list.
SUSP : suspend Writing 1 into the field RESET (bit 1) causes the hardware to de-assert this bit, whatever is written into this bit 2. Else: Software must write 1 in order to suspend an active channel i.e. a channel with an on-going GPDMA transfer over its master ports. The software must write 0 in order to resume a suspended channel, following the programming sequence detailed in .
bits : 2 - 2 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
write: resume channel, read: channel not suspended
0x1 : B_0x1
write: suspend channel, read: channel suspended.
End of enumeration elements list.
TCIE : transfer complete interrupt enable
bits : 8 - 8 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
HTIE : half transfer complete interrupt enable
bits : 9 - 9 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
DTEIE : data transfer error interrupt enable
bits : 10 - 10 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
ULEIE : update link transfer error interrupt enable
bits : 11 - 11 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
USEIE : user setting error interrupt enable
bits : 12 - 12 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
SUSPIE : completed suspension interrupt enable
bits : 13 - 13 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
TOIE : trigger overrun interrupt enable
bits : 14 - 14 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
LSM : Link step mode First the (possible 1D/repeated) block transfer is executed as defined by the current internal register file until GPDMA_CxBR1.BNDT[15:0] = 0 and GPDMA_CxBR1.BRC[10:0] = 0 if present. Secondly the next linked-list data structure is conditionally uploaded from memory as defined by GPDMA_CxLLR. Then channel execution is completed. Note: This bit must be written when EN=0. This bit is read-only when EN=1.
bits : 16 - 16 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
channel executed for the full linked-list and completed at the end of the last LLI (GPDMA_CxLLR = 0). The 16 low-significant bits of the link address are null (LA[15:0] = 0) and all the update bits are null (UT1 =UB1 = UT2 = USA = UDA = ULL = 0 and UT3 = UB2 = 0 if present). Then GPDMA_CxBR1.BNDT[15:0] = 0 and GPDMA_CxBR1.BRC[10:0] = 0 if present.
0x1 : B_0x1
channel executed once for the current LLI
End of enumeration elements list.
LAP : linked-list allocated port This bit is used to allocate the master port for the update of the GPDMA linked-list registers from the memory. Note: This bit must be written when EN=0. This bit is read-only when EN=1.
bits : 17 - 17 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
PRIO : priority level of the channel x GPDMA transfer versus others Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 22 - 23 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
low priority, low weight
0x1 : B_0x1
low priority, mid weight
0x2 : B_0x2
low priority, high weight
0x3 : B_0x3
high priority
End of enumeration elements list.
GPDMA channel 4 transfer register 1
address_offset : 0x290 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SDW_LOG2 : binary logarithm of the source data width of a burst in bytes Note: Setting a 8-byte data width causes a user setting error to be reported and no transfer is issued. A source block size must be a multiple of the source data width (GPDMA_CxBR1.BNDT[2:0] versus SDW_LOG2[1:0]). Otherwise, a user setting error is reported and no transfer is issued. A source single transfer must have an aligned address with its data width (start address GPDMA_CxSAR[2:0] versus SDW_LOG2[1:0]). Otherwise, a user setting error is reported and none transfer is issued.
bits : 0 - 1 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
byte
0x1 : B_0x1
half-word (2 bytes)
0x2 : B_0x2
word (4 bytes)
0x3 : B_0x3
user setting error reported and no transfer issued
End of enumeration elements list.
SINC : source incrementing burst The source address, pointed by GPDMA_CxSAR, is kept constant after a burst beat/single transfer or is incremented by the offset value corresponding to a contiguous data after a burst beat/single transfer.
bits : 3 - 3 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
fixed burst
0x1 : B_0x1
contiguously incremented burst
End of enumeration elements list.
SBL_1 : source burst length minus 1, between 0 and 63 The burst length unit is one data named beat within a burst. If SBL_1[5:0] =0 , the burst can be named as single. Each data/beat has a width defined by the destination data width SDW_LOG2[1:0]. Note: If a burst transfer crossed a 1-Kbyte address boundary on a AHB transfer, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the AHB protocol. If a burst transfer is of length greater than the FIFO size of the channel x, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the FIFO size. Transfer performance is lower, with GPDMA re-arbitration between effective and lower bursts/singles, but the data integrity is guaranteed.
bits : 4 - 9 (6 bit)
access : read-write
PAM : padding/alignment mode If DDW_LOG2[1:0] = SDW_LOG2[1:0]: if the data width of a burst destination transfer is equal to the data width of a burst source transfer, these bits are ignored. Else: - Case 1: If destination data width > source data width 1x: successive source data are FIFO queued and packed at the destination data width, in a left (LSB) to right (MSB) order (named little endian), before a destination transfer - Case 2: If destination data width < source data width 1x: source data is FIFO queued and unpacked at the destination data width, to be transferred in a left (LSB) to right (MSB) order (named little endian) to the destination Note:
bits : 11 - 12 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
source data is transferred as right aligned, left-truncated down to the destination data width
0x1 : B_0x1
source data is transferred as left-aligned, right-truncated down to the destination data width
0x0 : B_0x0
source data is transferred as right aligned, left-truncated down to the destination data width
0x1 : B_0x1
source data is transferred as left-aligned, right-truncated down to the destination data width
End of enumeration elements list.
SBX : source byte exchange within the unaligned half-word of each source word If the source data width is shorter than a word, this bit is ignored. If the source data width is a word:
bits : 13 - 13 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no byte-based exchange within the unaligned half-word of each source word
0x1 : B_0x1
the two consecutive bytes within the unaligned half-word of each source word are exchanged.
End of enumeration elements list.
SAP : source allocated port This bit is used to allocate the master port for the source transfer Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 14 - 14 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
SSEC : security attribute of the GPDMA transfer from the source If GPDMA_SECCFGR.SECx = 1 and the access is secure: This is a secure register bit. This bit can only be read by a secure software. This bit must be written by a secure software when GPDMA_SECCFGR.SECx =1 . A secure write is ignored when GPDMA_SECCFGR.SECx = 0. When GPDMA_SECCFGR.SECx is de-asserted, this SSEC bit is also de-asserted by hardware (on a secure reconfiguration of the channel as non-secure), and the GPDMA transfer from the source is non-secure.
bits : 15 - 15 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
GPDMA transfer non-secure
0x1 : B_0x1
GPDMA transfer secure
End of enumeration elements list.
DDW_LOG2 : binary logarithm of the destination data width of a burst, in bytes Note: Setting a 8-byte data width causes a user setting error to be reported and none transfer is issued. A destination burst transfer must have an aligned address with its data width (start address GPDMA_CxDAR[2:0] and address offset GPDMA_CxTR3.DAO[2:0], versus DDW_LOG2[1:0]). Otherwise a user setting error is reported and no transfer is issued.
bits : 16 - 17 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
byte
0x1 : B_0x1
half-word (2 bytes)
0x2 : B_0x2
word (4 bytes)
0x3 : B_0x3
user setting error reported and no transfer issued
End of enumeration elements list.
DINC : destination incrementing burst The destination address, pointed by GPDMA_CxDAR, is kept constant after a burst beat/single transfer, or is incremented by the offset value corresponding to a contiguous data after a burst beat/single transfer.
bits : 19 - 19 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
fixed burst
0x1 : B_0x1
contiguously incremented burst
End of enumeration elements list.
DBL_1 : destination burst length minus 1, between 0 and 63 The burst length unit is one data named beat within a burst. If DBL_1[5:0] =0 , the burst can be named as single. Each data/beat has a width defined by the destination data width DDW_LOG2[1:0]. Note: If a burst transfer crossed a 1-Kbyte address boundary on a AHB transfer, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the AHB protocol. If a burst transfer is of length greater than the FIFO size of the channel x, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the FIFO size. Transfer performance is lower, with GPDMA re-arbitration between effective and lower bursts/singles, but the data integrity is guaranteed.
bits : 20 - 25 (6 bit)
access : read-write
DBX : destination byte exchange If the destination data size is a byte, this bit is ignored. If the destination data size is not a byte:
bits : 26 - 26 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no byte-based exchange within half-word
0x1 : B_0x1
the two consecutive (post PAM) bytes are exchanged in each destination half-word.
End of enumeration elements list.
DHX : destination half-word exchange If the destination data size is shorter than a word, this bit is ignored. If the destination data size is a word:
bits : 27 - 27 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no halfword-based exchanged within word
0x1 : B_0x1
the two consecutive (post PAM) half-words are exchanged in each destination word.
End of enumeration elements list.
DAP : destination allocated port This bit is used to allocate the master port for the destination transfer Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
DSEC : security attribute of the GPDMA transfer to the destination If GPDMA_SECCFGR.SECx = 1 and the access is secure: This is a secure register bit. This bit can only be read by a secure software. This bit must be written by a secure software when GPDMA_SECCFGR.SECx = 1. A secure write is ignored when GPDMA_SECCFGR.SECx = 0. When GPDMA_SECCFGR.SECx is de-asserted, this DSEC bit is also de-asserted by hardware (on a secure reconfiguration of the channel as non-secure), and the GPDMA transfer to the destination is non-secure.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
GPDMA transfer non-secure
0x1 : B_0x1
GPDMA transfer secure
End of enumeration elements list.
GPDMA channel 4 transfer register 2
address_offset : 0x294 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
REQSEL : GPDMA hardware request selection These bits are ignored if channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer). Else, the selected hardware request is internally taken into account as per . The user must not assign a same input hardware request (same REQSEL[6:0] value) to different active GPDMA channels (GPDMA_CxCR.EN = 1 and GPDMA_CxTR2.SWREQ = 0 for these channels). GPDMA is not intended to hardware support the case of simultaneous enabled channels incorrectly configured with a same hardware peripheral request signal, and there is no user setting error reporting.
bits : 0 - 6 (7 bit)
access : read-write
SWREQ : software request This bit is internally taken into account when GPDMA_CxCR.EN is asserted.
bits : 9 - 9 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no software request. The selected hardware request REQSEL[6:0] is taken into account.
0x1 : B_0x1
software request for a memory-to-memory transfer. The default selected hardware request as per REQSEL[6:0] is ignored.
End of enumeration elements list.
DREQ : destination hardware request This bit is ignored if channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer). Else: Note:
bits : 10 - 10 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
selected hardware request driven by a source peripheral (request signal taken into account by the GPDMA transfer scheduler over the source/read port)
0x1 : B_0x1
selected hardware request driven by a destination peripheral (request signal taken into account by the GPDMA transfer scheduler over the destination/write port)
End of enumeration elements list.
BREQ : Block hardware request If the channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer), this bit is ignored. Else:
bits : 11 - 11 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
the selected hardware request is driven by a peripheral with a hardware request/acknowledge protocol at a burst level.
0x1 : B_0x1
the selected hardware request is driven by a peripheral with a hardware request/acknowledge protocol at a block level (see ).
End of enumeration elements list.
TRIGM : trigger mode These bits define the transfer granularity for its conditioning by the trigger. If the channel x is enabled (GPDMA_CxCR.EN asserted) with TRIGPOL[1:0] = 00 or 11, these TRIGM[1:0] bits are ignored. Else, a GPDMA transfer is conditioned by at least one trigger hit: first burst read of a 2D/repeated block transfer is conditioned by one hit trigger. – If the peripheral is programmed as a source (DREQ = 0) of the LLI data transfer, each programmed burst read is conditioned. – If the peripheral is programmed as a destination (DREQ = 1) of the LLI data transfer, each programmed burst write is conditioned. The first memory burst read of a (possibly 2D/repeated) block, also named as the first ready FIFO-based source burst, is gated by the occurrence of both the hardware request and the first trigger hit. The GPDMA monitoring of a trigger for channel x is started when the channel is enabled/loaded with a new active trigger configuration: rising or falling edge on a selected trigger (TRIGPOL[1:0] = 01 or respectively TRIGPOL[1:0] = 10). The monitoring of this trigger is kept active during the triggered and uncompleted (data or link) transfer and if a new trigger is detected then, this hit is internally memorized to grant the next transfer, as long as the defined rising or falling edge is not modified, and the TRIGSEL[5:0] is not modified, and the channel is enabled. Transferring a next LLIn+1 that updates the GPDMA_CxTR2 with a new value for any of TRIGSEL[5:0] or TRIGPOL[1:0], resets the monitoring, trashing the memorized hit of the formerly defined LLIn trigger. After a first new trigger hitn+1 is memorized, if another second trigger hitn+2 is detected and if the hitn triggered transfer is still not completed, hitn+2 is lost and not memorized.memorized. A trigger overrun flag is reported (GPDMA_CxSR.TOF =1 ), and an interrupt is generated if enabled (GPDMA_CxCR.TOIE = 1). The channel is not automatically disabled by hardware due to a trigger overrun. Note: When the source block size is not a multiple of the source burst size and is a multiple of the source data width, then the last programmed source burst is not completed and is internally shorten to match the block size. In this case, if TRIGM[1:0] = 11 and (SWREQ =1 or (SWREQ = 0 and DREQ =0 )), the shortened burst transfer (by singles or/and by bursts of lower length) is conditioned once by the trigger. When the programmed destination burst is internally shortened by singles or/and by bursts of lower length (versus FIFO size, versus block size, 1-Kbyte boundary address crossing): if the trigger is conditioning the programmed destination burst (if TRIGM[1:0] = 11 and SWREQ = 0 and DREQ = 1), this shortened destination burst transfer is conditioned once by the trigger.
bits : 14 - 15 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at block level: the first burst read of each block transfer is conditioned by one hit trigger (channel x = 12 to 15, for each block if a 2D/repeated block is configured with GPDMA_CxBR1.BRC[10:0] ≠ 0).
0x1 : B_0x1
channel x = 0 to 11, same as 00 channel x=12 to 15, at 2D/repeated block level, the
0x2 : B_0x2
at link level: a LLI link transfer is conditioned by one hit trigger. The LLI data transfer (if any) is not conditioned.
0x3 : B_0x3
at programmed burst level: If SWREQ = 1, each programmed burst read is conditioned by one hit trigger. If SWREQ = 0, each programmed burst that is requested by the selected peripheral, is conditioned by one hit trigger.
End of enumeration elements list.
TRIGSEL : trigger event input selection These bits select the trigger event input of the GPDMA transfer (as per ), with an active trigger event if TRIGPOL[1:0] ≠ 00.
bits : 16 - 21 (6 bit)
access : read-write
TRIGPOL : trigger event polarity These bits define the polarity of the selected trigger event input defined by TRIGSEL[5:0].
bits : 24 - 25 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no trigger (masked trigger event)
0x1 : B_0x1
trigger on the rising edge
0x2 : B_0x2
trigger on the falling edge
0x3 : B_0x3
same as 00
End of enumeration elements list.
TCEM : transfer complete event mode These bits define the transfer granularity for the transfer complete and half transfer complete events generation. Note: If the initial LLI0 data transfer is null/void (directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] = 0), then neither the complete transfer event nor the half transfer event is generated. Note: If the initial LLI0 data transfer is null/void (directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] = 0), then neither the complete transfer event nor the half transfer event is generated. Note: If the initial LLI0 data transfer is null/void (i.e. directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] =0 ), then the half transfer event is not generated, and the transfer complete event is generated when is completed the loading of the LLI1.
bits : 30 - 31 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at block level (when GPDMA_CxBR1.BNDT[15:0] = 0): the complete (and the half) transfer event is generated at the (respectively half of the) end of a block.
0x1 : B_0x1
channel x = 0 to 11, same as 00 channel x=12 to 15, at 2D/repeated block level (when GPDMA_CxBR1.BRC[10:0] = 0 and GPDMA_CxBR1.BNDT[15:0] = 0), the complete (and the half) transfer event is generated at the end (respectively half of the end) of the 2D/repeated block.
0x2 : B_0x2
at LLI level: the complete transfer event is generated at the end of the LLI transfer, including the update of the LLI if any. The half transfer event is generated at the half of the LLI data transfer (the LLI data transfer being a block transfer or a 2D/repeated block transfer for channel x = 12 to 15), if any data transfer.
0x3 : B_0x3
at channel level: the complete transfer event is generated at the end of the last LLI transfer. The half transfer event is generated at the half of the data transfer of the last LLI. The last LLI updates the link address GPDMA_CxLLR.LA[15:2] to zero and clears all the GPDMA_CxLLR update bits (UT1, UT2, UB1, USA, UDA and ULL, plus UT3 and UB2 if present). If the channel transfer is continuous/infinite, no event is generated.
End of enumeration elements list.
GPDMA channel 4 block register 1
address_offset : 0x298 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
BNDT : block number of data bytes to transfer from the source Block size transferred from the source. When the channel is enabled, this field becomes read-only and is decremented, indicating the remaining number of data items in the current source block to be transferred. BNDT[15:0] is programmed in number of bytes, maximum source block size is 64 Kbytes -1. Once the last data transfer is completed (BNDT[15:0] = 0): - if GPDMA_CxLLR.UB1 = 1, this field is updated by the LLI in the memory. - if GPDMA_CxLLR.UB1 = 0 and if there is at least one non null Uxx update bit, this field is internally restored to the programmed value. - if all GPDMA_CxLLR.Uxx = 0 and if GPDMA_CxLLR.LA[15:0] = 0, this field is internally restored to the programmed value (infinite/continuous last LLI). - if GPDMA_CxLLR = 0, this field is kept as zero following the last LLI data transfer. Note: A non-null source block size must be a multiple of the source data width (BNDT[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued. When configured in packing mode (GPDMA_CxTR1.PAM[1] = 1 and destination data width different from source data width), a non-null source block size must be a multiple of the destination data width (BNDT[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued.
bits : 0 - 15 (16 bit)
access : read-write
GPDMA channel 4 source address register
address_offset : 0x29C Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SA : source address This field is the pointer to the address from which the next data is read. During the channel activity, depending on the source addressing mode (GPDMA_CxTR1.SINC), this field is kept fixed or incremented by the data width (GPDMA_CxTR1.SDW_LOG2[1:0]) after each single source data, reflecting the next address from which data is read. During the channel activity, this address is updated after each completed source burst, consequently to: the programmed source burst either in fixed addressing mode or in contiguous-data incremented mode. If contiguously incremented (GPDMA_CxTR1.SINC = 1), then the additional address offset value is the programmed burst size, as defined by GPDMA_CxTR1.SBL_1[5:0] and GPDMA_CxTR1.SDW_LOG2[21:0] the additional source incremented/decremented offset value as programmed by GPDMA_CxBR1.SDEC and GPDMA_CxTR3.SAO[12:0] once/if completed source block transfer, for a channel x with 2D addressing capability (x = 12 to 15). additional block repeat source incremented/decremented offset value as programmed by GPDMA_CxBR1.BRSDEC and GPDMA_CxBR2.BRSAO[15:0] In linked-list mode, after a LLI data transfer is completed, this register is automatically updated by GPDMA from the memory, provided the LLI is set with GPDMA_CxLLR.USA = 1. Note: A source address must be aligned with the programmed data width of a source single (SA[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued. When the source block size is not a multiple of the source burst size and is a multiple of the source data width, the last programmed source burst is not completed and is internally shorten to match the block size. In this case, the additional GPDMA_CxTR3.SAO[12:0] is not applied.
bits : 0 - 31 (32 bit)
access : read-write
GPDMA channel 4 destination address register
address_offset : 0x2A0 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
DA : destination address This field is the pointer to the address from which the next data is written. During the channel activity, depending on the destination addressing mode (GPDMA_CxTR1.DINC), this field is kept fixed or incremented by the data width (GPDMA_CxTR1.DDW_LOG2[21:0]) after each single destination data, reflecting the next address from which data is written. During the channel activity, this address is updated after each completed destination burst, consequently to: the programmed destination burst either in fixed addressing mode or in contiguous-data incremented mode. If contiguously incremented (GPDMA_CxTR1.DINC = 1), then the additional address offset value is the programmed burst size, as defined by GPDMA_CxTR1.DBL_1[5:0] and GPDMA_CxTR1.DDW_LOG2[1:0] the additional destination incremented/decremented offset value as programmed by GPDMA_CxBR1.DDEC and GPDMA_CxTR3.DAO[12:0] once/if completed destination block transfer, for a channel x with 2D addressing capability (x = 12 to 15), the additional block repeat destination incremented/decremented offset value as programmed by GPDMA_CxBR1.BRDDEC and GPDMA_CxBR2.BRDAO[15:0] In linked-list mode, after a LLI data transfer is completed, this register is automatically updated by the GPDMA from the memory, provided the LLI is set with GPDMA_CxLLR.UDA = 1. Note: A destination address must be aligned with the programmed data width of a destination burst (DA[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued.
bits : 0 - 31 (32 bit)
access : read-write
GPDMA channel 4 linked-list address register
address_offset : 0x2CC Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
LA : pointer (16-bit low-significant address) to the next linked-list data structure If UT1 = UT2 = UB1 = USA = UDA = ULL = 0 and if LA[15:20] = 0, the current LLI is the last one. The channel transfer is completed without any update of the linked-list GPDMA register file. Else, this field is the pointer to the memory address offset from which the next linked-list data structure is automatically fetched from, once the data transfer is completed, in order to conditionally update the linked-list GPDMA internal register file (GPDMA_CxCTR1, GPDMA_CxTR2, GPDMA_CxBR1, GPDMA_CxSAR, GPDMA_CxDAR and GPDMA_CxLLR). Note: The user must program the pointer to be 32-bit aligned. The two low-significant bits are write ignored.
bits : 2 - 15 (14 bit)
access : read-write
ULL : Update GPDMA_CxLLR register from memory This bit is used to control the update of GPDMA_CxLLR from the memory during the link transfer.
bits : 16 - 16 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxLLR update
0x1 : B_0x1
GPDMA_CxLLR update
End of enumeration elements list.
UDA : Update GPDMA_CxDAR register from memory This bit is used to control the update of GPDMA_CxDAR from the memory during the link transfer.
bits : 27 - 27 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxDAR update
0x1 : B_0x1
GPDMA_CxDAR update
End of enumeration elements list.
USA : update GPDMA_CxSAR from memory This bit controls the update of GPDMA_CxSAR from the memory during the link transfer.
bits : 28 - 28 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxSAR update
0x1 : B_0x1
GPDMA_CxSAR update
End of enumeration elements list.
UB1 : Update GPDMA_CxBR1 from memory This bit controls the update of GPDMA_CxBR1 from the memory during the link transfer. If UB1 = 0 and if GPDMA_CxLLR ≠ 0, the linked-list is not completed. GPDMA_CxBR1.BNDT[15:0] is then restored to the programmed value after data transfer is completed and before the link transfer.
bits : 29 - 29 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxBR1 update from memory (GPDMA_CxBR1.BNDT[15:0] restored if any link transfer)
0x1 : B_0x1
GPDMA_CxBR1 update
End of enumeration elements list.
UT2 : Update GPDMA_CxTR2 from memory This bit controls the update of GPDMA_CxTR2 from the memory during the link transfer.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR2 update
0x1 : B_0x1
GPDMA_CxTR2 update
End of enumeration elements list.
UT1 : Update GPDMA_CxTR1 from memory This bit controls the update of GPDMA_CxTR1 from the memory during the link transfer.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR1 update
0x1 : B_0x1
GPDMA_CxTR1 update
End of enumeration elements list.
GPDMA channel 5 linked-list base address register
address_offset : 0x2D0 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
LBA : linked-list base address of GPDMA channel x
bits : 16 - 31 (16 bit)
access : read-write
GPDMA channel 5 flag clear register
address_offset : 0x2DC Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
TCF : transfer complete flag clear
bits : 8 - 8 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding TCF flag cleared
End of enumeration elements list.
HTF : half transfer flag clear
bits : 9 - 9 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding HTF flag cleared
End of enumeration elements list.
DTEF : data transfer error flag clear
bits : 10 - 10 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding DTEF flag cleared
End of enumeration elements list.
ULEF : update link transfer error flag clear
bits : 11 - 11 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding ULEF flag cleared
End of enumeration elements list.
USEF : user setting error flag clear
bits : 12 - 12 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding USEF flag cleared
End of enumeration elements list.
SUSPF : completed suspension flag clear
bits : 13 - 13 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding SUSPF flag cleared
End of enumeration elements list.
TOF : trigger overrun flag clear
bits : 14 - 14 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding TOF flag cleared
End of enumeration elements list.
GPDMA channel 5 status register
address_offset : 0x2E0 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
IDLEF : idle flag This idle flag is de-asserted by hardware when the channel is enabled (GPDMA_CxCR.EN = 1) with a valid channel configuration (no USEF to be immediately reported). This idle flag is asserted after hard reset or by hardware when the channel is back in idle state (in suspended or disabled state).
bits : 0 - 0 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
channel not in idle state
0x1 : B_0x1
channel in idle state
End of enumeration elements list.
TCF : transfer complete flag A transfer complete event is either a block transfer complete, a 2D/repeated block transfer complete, a LLI transfer complete including the upload of the next LLI if any, or the full linked-list completion, depending on the transfer complete event mode (GPDMA_CxTR2.TCEM[1:0]).
bits : 8 - 8 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no transfer complete event
0x1 : B_0x1
a transfer complete event occurred
End of enumeration elements list.
HTF : half transfer flag An half transfer event is either an half block transfer or an half 2D/repeated block transfer, depending on the transfer complete event mode (GPDMA_CxTR2.TCEM[1:0]). An half block transfer occurs when half of the bytes of the source block size (rounded up integer of GPDMA_CxBR1.BNDT[15:0]/2) has been transferred to the destination. An half 2D/repeated block transfer occurs when half of the repeated blocks (rounded up integer of (GPDMA_CxBR1.BRC[10:0]+1)/2)) has been transferred to the destination.
bits : 9 - 9 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no half transfer event
0x1 : B_0x1
an half transfer event occurred
End of enumeration elements list.
DTEF : data transfer error flag
bits : 10 - 10 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no data transfer error event
0x1 : B_0x1
a master bus error event occurred on a data transfer
End of enumeration elements list.
ULEF : update link transfer error flag
bits : 11 - 11 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no update link transfer error event
0x1 : B_0x1
a master bus error event occurred while updating a linked-list register from memory
End of enumeration elements list.
USEF : user setting error flag
bits : 12 - 12 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no user setting error event
0x1 : B_0x1
a user setting error event occurred
End of enumeration elements list.
SUSPF : completed suspension flag
bits : 13 - 13 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no completed suspension event
0x1 : B_0x1
a completed suspension event occurred
End of enumeration elements list.
TOF : trigger overrun flag
bits : 14 - 14 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no trigger overrun event
0x1 : B_0x1
a trigger overrun event occurred
End of enumeration elements list.
FIFOL : monitored FIFO level Number of available write beats in the FIFO, in units of the programmed destination data width (see GPDMA_CxTR1.DDW_LOG2[1:0], in units of bytes, half-words, or words). Note: After having suspended an active transfer, the user may need to read FIFOL[7:0], additionally to GPDMA_CxBR1.BDNT[15:0] and GPDMA_CxBR1.BRC[10:0], to know how many data have been transferred to the destination. Before reading, the user may wait for the transfer to be suspended (GPDMA_CxSR.SUSPF = 1).
bits : 16 - 23 (8 bit)
access : read-only
GPDMA channel 5 control register
address_offset : 0x2E4 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
EN : enable Writing 1 into the field RESET (bit 1) causes the hardware to de-assert this bit, whatever is written into this bit 0. Else: this bit is de-asserted by hardware when there is a transfer error (master bus error or user setting error) or when there is a channel transfer complete (channel ready to be configured, e.g. if LSM=1 at the end of a single execution of the LLI). Else, this bit can be asserted by software. Writing 0 into this EN bit is ignored.
bits : 0 - 0 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
write: ignored, read: channel disabled
0x1 : B_0x1
write: enable channel, read: channel enabled
End of enumeration elements list.
RESET : reset This bit is write only. Writing 0 has no impact. Writing 1 implies the reset of the following: the FIFO, the channel internal state, SUSP and EN bits (whatever is written receptively in bit 2 and bit 0). The reset is effective when the channel is in steady state, meaning one of the following: - active channel in suspended state (GPDMA_CxSR.SUSPF = 1 and GPDMA_CxSR.IDLEF = GPDMA_CxCR.EN = 1) - channel in disabled state (GPDMA_CxSR.IDLEF = 1 and GPDMA_CxCR.EN = 0). After writing a RESET, to continue using this channel, the user must explicitly reconfigure the channel including the hardware-modified configuration registers (GPDMA_CxBR1, GPDMA_CxSAR and GPDMA_CxDAR) before enabling again the channel (see the programming sequence in ).
bits : 1 - 1 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no channel reset
0x1 : B_0x1
channel reset
End of enumeration elements list.
SUSP : suspend Writing 1 into the field RESET (bit 1) causes the hardware to de-assert this bit, whatever is written into this bit 2. Else: Software must write 1 in order to suspend an active channel i.e. a channel with an on-going GPDMA transfer over its master ports. The software must write 0 in order to resume a suspended channel, following the programming sequence detailed in .
bits : 2 - 2 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
write: resume channel, read: channel not suspended
0x1 : B_0x1
write: suspend channel, read: channel suspended.
End of enumeration elements list.
TCIE : transfer complete interrupt enable
bits : 8 - 8 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
HTIE : half transfer complete interrupt enable
bits : 9 - 9 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
DTEIE : data transfer error interrupt enable
bits : 10 - 10 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
ULEIE : update link transfer error interrupt enable
bits : 11 - 11 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
USEIE : user setting error interrupt enable
bits : 12 - 12 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
SUSPIE : completed suspension interrupt enable
bits : 13 - 13 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
TOIE : trigger overrun interrupt enable
bits : 14 - 14 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
LSM : Link step mode First the (possible 1D/repeated) block transfer is executed as defined by the current internal register file until GPDMA_CxBR1.BNDT[15:0] = 0 and GPDMA_CxBR1.BRC[10:0] = 0 if present. Secondly the next linked-list data structure is conditionally uploaded from memory as defined by GPDMA_CxLLR. Then channel execution is completed. Note: This bit must be written when EN=0. This bit is read-only when EN=1.
bits : 16 - 16 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
channel executed for the full linked-list and completed at the end of the last LLI (GPDMA_CxLLR = 0). The 16 low-significant bits of the link address are null (LA[15:0] = 0) and all the update bits are null (UT1 =UB1 = UT2 = USA = UDA = ULL = 0 and UT3 = UB2 = 0 if present). Then GPDMA_CxBR1.BNDT[15:0] = 0 and GPDMA_CxBR1.BRC[10:0] = 0 if present.
0x1 : B_0x1
channel executed once for the current LLI
End of enumeration elements list.
LAP : linked-list allocated port This bit is used to allocate the master port for the update of the GPDMA linked-list registers from the memory. Note: This bit must be written when EN=0. This bit is read-only when EN=1.
bits : 17 - 17 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
PRIO : priority level of the channel x GPDMA transfer versus others Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 22 - 23 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
low priority, low weight
0x1 : B_0x1
low priority, mid weight
0x2 : B_0x2
low priority, high weight
0x3 : B_0x3
high priority
End of enumeration elements list.
GPDMA channel 5 transfer register 1
address_offset : 0x310 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SDW_LOG2 : binary logarithm of the source data width of a burst in bytes Note: Setting a 8-byte data width causes a user setting error to be reported and no transfer is issued. A source block size must be a multiple of the source data width (GPDMA_CxBR1.BNDT[2:0] versus SDW_LOG2[1:0]). Otherwise, a user setting error is reported and no transfer is issued. A source single transfer must have an aligned address with its data width (start address GPDMA_CxSAR[2:0] versus SDW_LOG2[1:0]). Otherwise, a user setting error is reported and none transfer is issued.
bits : 0 - 1 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
byte
0x1 : B_0x1
half-word (2 bytes)
0x2 : B_0x2
word (4 bytes)
0x3 : B_0x3
user setting error reported and no transfer issued
End of enumeration elements list.
SINC : source incrementing burst The source address, pointed by GPDMA_CxSAR, is kept constant after a burst beat/single transfer or is incremented by the offset value corresponding to a contiguous data after a burst beat/single transfer.
bits : 3 - 3 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
fixed burst
0x1 : B_0x1
contiguously incremented burst
End of enumeration elements list.
SBL_1 : source burst length minus 1, between 0 and 63 The burst length unit is one data named beat within a burst. If SBL_1[5:0] =0 , the burst can be named as single. Each data/beat has a width defined by the destination data width SDW_LOG2[1:0]. Note: If a burst transfer crossed a 1-Kbyte address boundary on a AHB transfer, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the AHB protocol. If a burst transfer is of length greater than the FIFO size of the channel x, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the FIFO size. Transfer performance is lower, with GPDMA re-arbitration between effective and lower bursts/singles, but the data integrity is guaranteed.
bits : 4 - 9 (6 bit)
access : read-write
PAM : padding/alignment mode If DDW_LOG2[1:0] = SDW_LOG2[1:0]: if the data width of a burst destination transfer is equal to the data width of a burst source transfer, these bits are ignored. Else: - Case 1: If destination data width > source data width 1x: successive source data are FIFO queued and packed at the destination data width, in a left (LSB) to right (MSB) order (named little endian), before a destination transfer - Case 2: If destination data width < source data width 1x: source data is FIFO queued and unpacked at the destination data width, to be transferred in a left (LSB) to right (MSB) order (named little endian) to the destination Note:
bits : 11 - 12 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
source data is transferred as right aligned, left-truncated down to the destination data width
0x1 : B_0x1
source data is transferred as left-aligned, right-truncated down to the destination data width
0x0 : B_0x0
source data is transferred as right aligned, left-truncated down to the destination data width
0x1 : B_0x1
source data is transferred as left-aligned, right-truncated down to the destination data width
End of enumeration elements list.
SBX : source byte exchange within the unaligned half-word of each source word If the source data width is shorter than a word, this bit is ignored. If the source data width is a word:
bits : 13 - 13 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no byte-based exchange within the unaligned half-word of each source word
0x1 : B_0x1
the two consecutive bytes within the unaligned half-word of each source word are exchanged.
End of enumeration elements list.
SAP : source allocated port This bit is used to allocate the master port for the source transfer Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 14 - 14 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
SSEC : security attribute of the GPDMA transfer from the source If GPDMA_SECCFGR.SECx = 1 and the access is secure: This is a secure register bit. This bit can only be read by a secure software. This bit must be written by a secure software when GPDMA_SECCFGR.SECx =1 . A secure write is ignored when GPDMA_SECCFGR.SECx = 0. When GPDMA_SECCFGR.SECx is de-asserted, this SSEC bit is also de-asserted by hardware (on a secure reconfiguration of the channel as non-secure), and the GPDMA transfer from the source is non-secure.
bits : 15 - 15 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
GPDMA transfer non-secure
0x1 : B_0x1
GPDMA transfer secure
End of enumeration elements list.
DDW_LOG2 : binary logarithm of the destination data width of a burst, in bytes Note: Setting a 8-byte data width causes a user setting error to be reported and none transfer is issued. A destination burst transfer must have an aligned address with its data width (start address GPDMA_CxDAR[2:0] and address offset GPDMA_CxTR3.DAO[2:0], versus DDW_LOG2[1:0]). Otherwise a user setting error is reported and no transfer is issued.
bits : 16 - 17 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
byte
0x1 : B_0x1
half-word (2 bytes)
0x2 : B_0x2
word (4 bytes)
0x3 : B_0x3
user setting error reported and no transfer issued
End of enumeration elements list.
DINC : destination incrementing burst The destination address, pointed by GPDMA_CxDAR, is kept constant after a burst beat/single transfer, or is incremented by the offset value corresponding to a contiguous data after a burst beat/single transfer.
bits : 19 - 19 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
fixed burst
0x1 : B_0x1
contiguously incremented burst
End of enumeration elements list.
DBL_1 : destination burst length minus 1, between 0 and 63 The burst length unit is one data named beat within a burst. If DBL_1[5:0] =0 , the burst can be named as single. Each data/beat has a width defined by the destination data width DDW_LOG2[1:0]. Note: If a burst transfer crossed a 1-Kbyte address boundary on a AHB transfer, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the AHB protocol. If a burst transfer is of length greater than the FIFO size of the channel x, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the FIFO size. Transfer performance is lower, with GPDMA re-arbitration between effective and lower bursts/singles, but the data integrity is guaranteed.
bits : 20 - 25 (6 bit)
access : read-write
DBX : destination byte exchange If the destination data size is a byte, this bit is ignored. If the destination data size is not a byte:
bits : 26 - 26 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no byte-based exchange within half-word
0x1 : B_0x1
the two consecutive (post PAM) bytes are exchanged in each destination half-word.
End of enumeration elements list.
DHX : destination half-word exchange If the destination data size is shorter than a word, this bit is ignored. If the destination data size is a word:
bits : 27 - 27 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no halfword-based exchanged within word
0x1 : B_0x1
the two consecutive (post PAM) half-words are exchanged in each destination word.
End of enumeration elements list.
DAP : destination allocated port This bit is used to allocate the master port for the destination transfer Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
DSEC : security attribute of the GPDMA transfer to the destination If GPDMA_SECCFGR.SECx = 1 and the access is secure: This is a secure register bit. This bit can only be read by a secure software. This bit must be written by a secure software when GPDMA_SECCFGR.SECx = 1. A secure write is ignored when GPDMA_SECCFGR.SECx = 0. When GPDMA_SECCFGR.SECx is de-asserted, this DSEC bit is also de-asserted by hardware (on a secure reconfiguration of the channel as non-secure), and the GPDMA transfer to the destination is non-secure.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
GPDMA transfer non-secure
0x1 : B_0x1
GPDMA transfer secure
End of enumeration elements list.
GPDMA channel 5 transfer register 2
address_offset : 0x314 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
REQSEL : GPDMA hardware request selection These bits are ignored if channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer). Else, the selected hardware request is internally taken into account as per . The user must not assign a same input hardware request (same REQSEL[6:0] value) to different active GPDMA channels (GPDMA_CxCR.EN = 1 and GPDMA_CxTR2.SWREQ = 0 for these channels). GPDMA is not intended to hardware support the case of simultaneous enabled channels incorrectly configured with a same hardware peripheral request signal, and there is no user setting error reporting.
bits : 0 - 6 (7 bit)
access : read-write
SWREQ : software request This bit is internally taken into account when GPDMA_CxCR.EN is asserted.
bits : 9 - 9 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no software request. The selected hardware request REQSEL[6:0] is taken into account.
0x1 : B_0x1
software request for a memory-to-memory transfer. The default selected hardware request as per REQSEL[6:0] is ignored.
End of enumeration elements list.
DREQ : destination hardware request This bit is ignored if channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer). Else: Note:
bits : 10 - 10 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
selected hardware request driven by a source peripheral (request signal taken into account by the GPDMA transfer scheduler over the source/read port)
0x1 : B_0x1
selected hardware request driven by a destination peripheral (request signal taken into account by the GPDMA transfer scheduler over the destination/write port)
End of enumeration elements list.
BREQ : Block hardware request If the channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer), this bit is ignored. Else:
bits : 11 - 11 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
the selected hardware request is driven by a peripheral with a hardware request/acknowledge protocol at a burst level.
0x1 : B_0x1
the selected hardware request is driven by a peripheral with a hardware request/acknowledge protocol at a block level (see ).
End of enumeration elements list.
TRIGM : trigger mode These bits define the transfer granularity for its conditioning by the trigger. If the channel x is enabled (GPDMA_CxCR.EN asserted) with TRIGPOL[1:0] = 00 or 11, these TRIGM[1:0] bits are ignored. Else, a GPDMA transfer is conditioned by at least one trigger hit: first burst read of a 2D/repeated block transfer is conditioned by one hit trigger. – If the peripheral is programmed as a source (DREQ = 0) of the LLI data transfer, each programmed burst read is conditioned. – If the peripheral is programmed as a destination (DREQ = 1) of the LLI data transfer, each programmed burst write is conditioned. The first memory burst read of a (possibly 2D/repeated) block, also named as the first ready FIFO-based source burst, is gated by the occurrence of both the hardware request and the first trigger hit. The GPDMA monitoring of a trigger for channel x is started when the channel is enabled/loaded with a new active trigger configuration: rising or falling edge on a selected trigger (TRIGPOL[1:0] = 01 or respectively TRIGPOL[1:0] = 10). The monitoring of this trigger is kept active during the triggered and uncompleted (data or link) transfer and if a new trigger is detected then, this hit is internally memorized to grant the next transfer, as long as the defined rising or falling edge is not modified, and the TRIGSEL[5:0] is not modified, and the channel is enabled. Transferring a next LLIn+1 that updates the GPDMA_CxTR2 with a new value for any of TRIGSEL[5:0] or TRIGPOL[1:0], resets the monitoring, trashing the memorized hit of the formerly defined LLIn trigger. After a first new trigger hitn+1 is memorized, if another second trigger hitn+2 is detected and if the hitn triggered transfer is still not completed, hitn+2 is lost and not memorized.memorized. A trigger overrun flag is reported (GPDMA_CxSR.TOF =1 ), and an interrupt is generated if enabled (GPDMA_CxCR.TOIE = 1). The channel is not automatically disabled by hardware due to a trigger overrun. Note: When the source block size is not a multiple of the source burst size and is a multiple of the source data width, then the last programmed source burst is not completed and is internally shorten to match the block size. In this case, if TRIGM[1:0] = 11 and (SWREQ =1 or (SWREQ = 0 and DREQ =0 )), the shortened burst transfer (by singles or/and by bursts of lower length) is conditioned once by the trigger. When the programmed destination burst is internally shortened by singles or/and by bursts of lower length (versus FIFO size, versus block size, 1-Kbyte boundary address crossing): if the trigger is conditioning the programmed destination burst (if TRIGM[1:0] = 11 and SWREQ = 0 and DREQ = 1), this shortened destination burst transfer is conditioned once by the trigger.
bits : 14 - 15 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at block level: the first burst read of each block transfer is conditioned by one hit trigger (channel x = 12 to 15, for each block if a 2D/repeated block is configured with GPDMA_CxBR1.BRC[10:0] ≠ 0).
0x1 : B_0x1
channel x = 0 to 11, same as 00 channel x=12 to 15, at 2D/repeated block level, the
0x2 : B_0x2
at link level: a LLI link transfer is conditioned by one hit trigger. The LLI data transfer (if any) is not conditioned.
0x3 : B_0x3
at programmed burst level: If SWREQ = 1, each programmed burst read is conditioned by one hit trigger. If SWREQ = 0, each programmed burst that is requested by the selected peripheral, is conditioned by one hit trigger.
End of enumeration elements list.
TRIGSEL : trigger event input selection These bits select the trigger event input of the GPDMA transfer (as per ), with an active trigger event if TRIGPOL[1:0] ≠ 00.
bits : 16 - 21 (6 bit)
access : read-write
TRIGPOL : trigger event polarity These bits define the polarity of the selected trigger event input defined by TRIGSEL[5:0].
bits : 24 - 25 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no trigger (masked trigger event)
0x1 : B_0x1
trigger on the rising edge
0x2 : B_0x2
trigger on the falling edge
0x3 : B_0x3
same as 00
End of enumeration elements list.
TCEM : transfer complete event mode These bits define the transfer granularity for the transfer complete and half transfer complete events generation. Note: If the initial LLI0 data transfer is null/void (directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] = 0), then neither the complete transfer event nor the half transfer event is generated. Note: If the initial LLI0 data transfer is null/void (directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] = 0), then neither the complete transfer event nor the half transfer event is generated. Note: If the initial LLI0 data transfer is null/void (i.e. directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] =0 ), then the half transfer event is not generated, and the transfer complete event is generated when is completed the loading of the LLI1.
bits : 30 - 31 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at block level (when GPDMA_CxBR1.BNDT[15:0] = 0): the complete (and the half) transfer event is generated at the (respectively half of the) end of a block.
0x1 : B_0x1
channel x = 0 to 11, same as 00 channel x=12 to 15, at 2D/repeated block level (when GPDMA_CxBR1.BRC[10:0] = 0 and GPDMA_CxBR1.BNDT[15:0] = 0), the complete (and the half) transfer event is generated at the end (respectively half of the end) of the 2D/repeated block.
0x2 : B_0x2
at LLI level: the complete transfer event is generated at the end of the LLI transfer, including the update of the LLI if any. The half transfer event is generated at the half of the LLI data transfer (the LLI data transfer being a block transfer or a 2D/repeated block transfer for channel x = 12 to 15), if any data transfer.
0x3 : B_0x3
at channel level: the complete transfer event is generated at the end of the last LLI transfer. The half transfer event is generated at the half of the data transfer of the last LLI. The last LLI updates the link address GPDMA_CxLLR.LA[15:2] to zero and clears all the GPDMA_CxLLR update bits (UT1, UT2, UB1, USA, UDA and ULL, plus UT3 and UB2 if present). If the channel transfer is continuous/infinite, no event is generated.
End of enumeration elements list.
GPDMA channel 5 block register 1
address_offset : 0x318 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
BNDT : block number of data bytes to transfer from the source Block size transferred from the source. When the channel is enabled, this field becomes read-only and is decremented, indicating the remaining number of data items in the current source block to be transferred. BNDT[15:0] is programmed in number of bytes, maximum source block size is 64 Kbytes -1. Once the last data transfer is completed (BNDT[15:0] = 0): - if GPDMA_CxLLR.UB1 = 1, this field is updated by the LLI in the memory. - if GPDMA_CxLLR.UB1 = 0 and if there is at least one non null Uxx update bit, this field is internally restored to the programmed value. - if all GPDMA_CxLLR.Uxx = 0 and if GPDMA_CxLLR.LA[15:0] = 0, this field is internally restored to the programmed value (infinite/continuous last LLI). - if GPDMA_CxLLR = 0, this field is kept as zero following the last LLI data transfer. Note: A non-null source block size must be a multiple of the source data width (BNDT[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued. When configured in packing mode (GPDMA_CxTR1.PAM[1] = 1 and destination data width different from source data width), a non-null source block size must be a multiple of the destination data width (BNDT[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued.
bits : 0 - 15 (16 bit)
access : read-write
GPDMA channel 5 source address register
address_offset : 0x31C Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SA : source address This field is the pointer to the address from which the next data is read. During the channel activity, depending on the source addressing mode (GPDMA_CxTR1.SINC), this field is kept fixed or incremented by the data width (GPDMA_CxTR1.SDW_LOG2[1:0]) after each single source data, reflecting the next address from which data is read. During the channel activity, this address is updated after each completed source burst, consequently to: the programmed source burst either in fixed addressing mode or in contiguous-data incremented mode. If contiguously incremented (GPDMA_CxTR1.SINC = 1), then the additional address offset value is the programmed burst size, as defined by GPDMA_CxTR1.SBL_1[5:0] and GPDMA_CxTR1.SDW_LOG2[21:0] the additional source incremented/decremented offset value as programmed by GPDMA_CxBR1.SDEC and GPDMA_CxTR3.SAO[12:0] once/if completed source block transfer, for a channel x with 2D addressing capability (x = 12 to 15). additional block repeat source incremented/decremented offset value as programmed by GPDMA_CxBR1.BRSDEC and GPDMA_CxBR2.BRSAO[15:0] In linked-list mode, after a LLI data transfer is completed, this register is automatically updated by GPDMA from the memory, provided the LLI is set with GPDMA_CxLLR.USA = 1. Note: A source address must be aligned with the programmed data width of a source single (SA[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued. When the source block size is not a multiple of the source burst size and is a multiple of the source data width, the last programmed source burst is not completed and is internally shorten to match the block size. In this case, the additional GPDMA_CxTR3.SAO[12:0] is not applied.
bits : 0 - 31 (32 bit)
access : read-write
GPDMA channel 5 destination address register
address_offset : 0x320 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
DA : destination address This field is the pointer to the address from which the next data is written. During the channel activity, depending on the destination addressing mode (GPDMA_CxTR1.DINC), this field is kept fixed or incremented by the data width (GPDMA_CxTR1.DDW_LOG2[21:0]) after each single destination data, reflecting the next address from which data is written. During the channel activity, this address is updated after each completed destination burst, consequently to: the programmed destination burst either in fixed addressing mode or in contiguous-data incremented mode. If contiguously incremented (GPDMA_CxTR1.DINC = 1), then the additional address offset value is the programmed burst size, as defined by GPDMA_CxTR1.DBL_1[5:0] and GPDMA_CxTR1.DDW_LOG2[1:0] the additional destination incremented/decremented offset value as programmed by GPDMA_CxBR1.DDEC and GPDMA_CxTR3.DAO[12:0] once/if completed destination block transfer, for a channel x with 2D addressing capability (x = 12 to 15), the additional block repeat destination incremented/decremented offset value as programmed by GPDMA_CxBR1.BRDDEC and GPDMA_CxBR2.BRDAO[15:0] In linked-list mode, after a LLI data transfer is completed, this register is automatically updated by the GPDMA from the memory, provided the LLI is set with GPDMA_CxLLR.UDA = 1. Note: A destination address must be aligned with the programmed data width of a destination burst (DA[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued.
bits : 0 - 31 (32 bit)
access : read-write
GPDMA channel 5 linked-list address register
address_offset : 0x34C Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
LA : pointer (16-bit low-significant address) to the next linked-list data structure If UT1 = UT2 = UB1 = USA = UDA = ULL = 0 and if LA[15:20] = 0, the current LLI is the last one. The channel transfer is completed without any update of the linked-list GPDMA register file. Else, this field is the pointer to the memory address offset from which the next linked-list data structure is automatically fetched from, once the data transfer is completed, in order to conditionally update the linked-list GPDMA internal register file (GPDMA_CxCTR1, GPDMA_CxTR2, GPDMA_CxBR1, GPDMA_CxSAR, GPDMA_CxDAR and GPDMA_CxLLR). Note: The user must program the pointer to be 32-bit aligned. The two low-significant bits are write ignored.
bits : 2 - 15 (14 bit)
access : read-write
ULL : Update GPDMA_CxLLR register from memory This bit is used to control the update of GPDMA_CxLLR from the memory during the link transfer.
bits : 16 - 16 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxLLR update
0x1 : B_0x1
GPDMA_CxLLR update
End of enumeration elements list.
UDA : Update GPDMA_CxDAR register from memory This bit is used to control the update of GPDMA_CxDAR from the memory during the link transfer.
bits : 27 - 27 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxDAR update
0x1 : B_0x1
GPDMA_CxDAR update
End of enumeration elements list.
USA : update GPDMA_CxSAR from memory This bit controls the update of GPDMA_CxSAR from the memory during the link transfer.
bits : 28 - 28 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxSAR update
0x1 : B_0x1
GPDMA_CxSAR update
End of enumeration elements list.
UB1 : Update GPDMA_CxBR1 from memory This bit controls the update of GPDMA_CxBR1 from the memory during the link transfer. If UB1 = 0 and if GPDMA_CxLLR ≠ 0, the linked-list is not completed. GPDMA_CxBR1.BNDT[15:0] is then restored to the programmed value after data transfer is completed and before the link transfer.
bits : 29 - 29 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxBR1 update from memory (GPDMA_CxBR1.BNDT[15:0] restored if any link transfer)
0x1 : B_0x1
GPDMA_CxBR1 update
End of enumeration elements list.
UT2 : Update GPDMA_CxTR2 from memory This bit controls the update of GPDMA_CxTR2 from the memory during the link transfer.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR2 update
0x1 : B_0x1
GPDMA_CxTR2 update
End of enumeration elements list.
UT1 : Update GPDMA_CxTR1 from memory This bit controls the update of GPDMA_CxTR1 from the memory during the link transfer.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR1 update
0x1 : B_0x1
GPDMA_CxTR1 update
End of enumeration elements list.
GPDMA channel 6 linked-list base address register
address_offset : 0x350 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
LBA : linked-list base address of GPDMA channel x
bits : 16 - 31 (16 bit)
access : read-write
GPDMA channel 6 flag clear register
address_offset : 0x35C Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
TCF : transfer complete flag clear
bits : 8 - 8 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding TCF flag cleared
End of enumeration elements list.
HTF : half transfer flag clear
bits : 9 - 9 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding HTF flag cleared
End of enumeration elements list.
DTEF : data transfer error flag clear
bits : 10 - 10 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding DTEF flag cleared
End of enumeration elements list.
ULEF : update link transfer error flag clear
bits : 11 - 11 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding ULEF flag cleared
End of enumeration elements list.
USEF : user setting error flag clear
bits : 12 - 12 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding USEF flag cleared
End of enumeration elements list.
SUSPF : completed suspension flag clear
bits : 13 - 13 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding SUSPF flag cleared
End of enumeration elements list.
TOF : trigger overrun flag clear
bits : 14 - 14 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding TOF flag cleared
End of enumeration elements list.
GPDMA channel 6 status register
address_offset : 0x360 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
IDLEF : idle flag This idle flag is de-asserted by hardware when the channel is enabled (GPDMA_CxCR.EN = 1) with a valid channel configuration (no USEF to be immediately reported). This idle flag is asserted after hard reset or by hardware when the channel is back in idle state (in suspended or disabled state).
bits : 0 - 0 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
channel not in idle state
0x1 : B_0x1
channel in idle state
End of enumeration elements list.
TCF : transfer complete flag A transfer complete event is either a block transfer complete, a 2D/repeated block transfer complete, a LLI transfer complete including the upload of the next LLI if any, or the full linked-list completion, depending on the transfer complete event mode (GPDMA_CxTR2.TCEM[1:0]).
bits : 8 - 8 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no transfer complete event
0x1 : B_0x1
a transfer complete event occurred
End of enumeration elements list.
HTF : half transfer flag An half transfer event is either an half block transfer or an half 2D/repeated block transfer, depending on the transfer complete event mode (GPDMA_CxTR2.TCEM[1:0]). An half block transfer occurs when half of the bytes of the source block size (rounded up integer of GPDMA_CxBR1.BNDT[15:0]/2) has been transferred to the destination. An half 2D/repeated block transfer occurs when half of the repeated blocks (rounded up integer of (GPDMA_CxBR1.BRC[10:0]+1)/2)) has been transferred to the destination.
bits : 9 - 9 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no half transfer event
0x1 : B_0x1
an half transfer event occurred
End of enumeration elements list.
DTEF : data transfer error flag
bits : 10 - 10 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no data transfer error event
0x1 : B_0x1
a master bus error event occurred on a data transfer
End of enumeration elements list.
ULEF : update link transfer error flag
bits : 11 - 11 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no update link transfer error event
0x1 : B_0x1
a master bus error event occurred while updating a linked-list register from memory
End of enumeration elements list.
USEF : user setting error flag
bits : 12 - 12 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no user setting error event
0x1 : B_0x1
a user setting error event occurred
End of enumeration elements list.
SUSPF : completed suspension flag
bits : 13 - 13 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no completed suspension event
0x1 : B_0x1
a completed suspension event occurred
End of enumeration elements list.
TOF : trigger overrun flag
bits : 14 - 14 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no trigger overrun event
0x1 : B_0x1
a trigger overrun event occurred
End of enumeration elements list.
FIFOL : monitored FIFO level Number of available write beats in the FIFO, in units of the programmed destination data width (see GPDMA_CxTR1.DDW_LOG2[1:0], in units of bytes, half-words, or words). Note: After having suspended an active transfer, the user may need to read FIFOL[7:0], additionally to GPDMA_CxBR1.BDNT[15:0] and GPDMA_CxBR1.BRC[10:0], to know how many data have been transferred to the destination. Before reading, the user may wait for the transfer to be suspended (GPDMA_CxSR.SUSPF = 1).
bits : 16 - 23 (8 bit)
access : read-only
GPDMA channel 6 control register
address_offset : 0x364 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
EN : enable Writing 1 into the field RESET (bit 1) causes the hardware to de-assert this bit, whatever is written into this bit 0. Else: this bit is de-asserted by hardware when there is a transfer error (master bus error or user setting error) or when there is a channel transfer complete (channel ready to be configured, e.g. if LSM=1 at the end of a single execution of the LLI). Else, this bit can be asserted by software. Writing 0 into this EN bit is ignored.
bits : 0 - 0 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
write: ignored, read: channel disabled
0x1 : B_0x1
write: enable channel, read: channel enabled
End of enumeration elements list.
RESET : reset This bit is write only. Writing 0 has no impact. Writing 1 implies the reset of the following: the FIFO, the channel internal state, SUSP and EN bits (whatever is written receptively in bit 2 and bit 0). The reset is effective when the channel is in steady state, meaning one of the following: - active channel in suspended state (GPDMA_CxSR.SUSPF = 1 and GPDMA_CxSR.IDLEF = GPDMA_CxCR.EN = 1) - channel in disabled state (GPDMA_CxSR.IDLEF = 1 and GPDMA_CxCR.EN = 0). After writing a RESET, to continue using this channel, the user must explicitly reconfigure the channel including the hardware-modified configuration registers (GPDMA_CxBR1, GPDMA_CxSAR and GPDMA_CxDAR) before enabling again the channel (see the programming sequence in ).
bits : 1 - 1 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no channel reset
0x1 : B_0x1
channel reset
End of enumeration elements list.
SUSP : suspend Writing 1 into the field RESET (bit 1) causes the hardware to de-assert this bit, whatever is written into this bit 2. Else: Software must write 1 in order to suspend an active channel i.e. a channel with an on-going GPDMA transfer over its master ports. The software must write 0 in order to resume a suspended channel, following the programming sequence detailed in .
bits : 2 - 2 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
write: resume channel, read: channel not suspended
0x1 : B_0x1
write: suspend channel, read: channel suspended.
End of enumeration elements list.
TCIE : transfer complete interrupt enable
bits : 8 - 8 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
HTIE : half transfer complete interrupt enable
bits : 9 - 9 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
DTEIE : data transfer error interrupt enable
bits : 10 - 10 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
ULEIE : update link transfer error interrupt enable
bits : 11 - 11 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
USEIE : user setting error interrupt enable
bits : 12 - 12 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
SUSPIE : completed suspension interrupt enable
bits : 13 - 13 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
TOIE : trigger overrun interrupt enable
bits : 14 - 14 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
LSM : Link step mode First the (possible 1D/repeated) block transfer is executed as defined by the current internal register file until GPDMA_CxBR1.BNDT[15:0] = 0 and GPDMA_CxBR1.BRC[10:0] = 0 if present. Secondly the next linked-list data structure is conditionally uploaded from memory as defined by GPDMA_CxLLR. Then channel execution is completed. Note: This bit must be written when EN=0. This bit is read-only when EN=1.
bits : 16 - 16 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
channel executed for the full linked-list and completed at the end of the last LLI (GPDMA_CxLLR = 0). The 16 low-significant bits of the link address are null (LA[15:0] = 0) and all the update bits are null (UT1 =UB1 = UT2 = USA = UDA = ULL = 0 and UT3 = UB2 = 0 if present). Then GPDMA_CxBR1.BNDT[15:0] = 0 and GPDMA_CxBR1.BRC[10:0] = 0 if present.
0x1 : B_0x1
channel executed once for the current LLI
End of enumeration elements list.
LAP : linked-list allocated port This bit is used to allocate the master port for the update of the GPDMA linked-list registers from the memory. Note: This bit must be written when EN=0. This bit is read-only when EN=1.
bits : 17 - 17 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
PRIO : priority level of the channel x GPDMA transfer versus others Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 22 - 23 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
low priority, low weight
0x1 : B_0x1
low priority, mid weight
0x2 : B_0x2
low priority, high weight
0x3 : B_0x3
high priority
End of enumeration elements list.
GPDMA channel 6 transfer register 1
address_offset : 0x390 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SDW_LOG2 : binary logarithm of the source data width of a burst in bytes Note: Setting a 8-byte data width causes a user setting error to be reported and no transfer is issued. A source block size must be a multiple of the source data width (GPDMA_CxBR1.BNDT[2:0] versus SDW_LOG2[1:0]). Otherwise, a user setting error is reported and no transfer is issued. A source single transfer must have an aligned address with its data width (start address GPDMA_CxSAR[2:0] versus SDW_LOG2[1:0]). Otherwise, a user setting error is reported and none transfer is issued.
bits : 0 - 1 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
byte
0x1 : B_0x1
half-word (2 bytes)
0x2 : B_0x2
word (4 bytes)
0x3 : B_0x3
user setting error reported and no transfer issued
End of enumeration elements list.
SINC : source incrementing burst The source address, pointed by GPDMA_CxSAR, is kept constant after a burst beat/single transfer or is incremented by the offset value corresponding to a contiguous data after a burst beat/single transfer.
bits : 3 - 3 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
fixed burst
0x1 : B_0x1
contiguously incremented burst
End of enumeration elements list.
SBL_1 : source burst length minus 1, between 0 and 63 The burst length unit is one data named beat within a burst. If SBL_1[5:0] =0 , the burst can be named as single. Each data/beat has a width defined by the destination data width SDW_LOG2[1:0]. Note: If a burst transfer crossed a 1-Kbyte address boundary on a AHB transfer, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the AHB protocol. If a burst transfer is of length greater than the FIFO size of the channel x, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the FIFO size. Transfer performance is lower, with GPDMA re-arbitration between effective and lower bursts/singles, but the data integrity is guaranteed.
bits : 4 - 9 (6 bit)
access : read-write
PAM : padding/alignment mode If DDW_LOG2[1:0] = SDW_LOG2[1:0]: if the data width of a burst destination transfer is equal to the data width of a burst source transfer, these bits are ignored. Else: - Case 1: If destination data width > source data width 1x: successive source data are FIFO queued and packed at the destination data width, in a left (LSB) to right (MSB) order (named little endian), before a destination transfer - Case 2: If destination data width < source data width 1x: source data is FIFO queued and unpacked at the destination data width, to be transferred in a left (LSB) to right (MSB) order (named little endian) to the destination Note:
bits : 11 - 12 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
source data is transferred as right aligned, left-truncated down to the destination data width
0x1 : B_0x1
source data is transferred as left-aligned, right-truncated down to the destination data width
0x0 : B_0x0
source data is transferred as right aligned, left-truncated down to the destination data width
0x1 : B_0x1
source data is transferred as left-aligned, right-truncated down to the destination data width
End of enumeration elements list.
SBX : source byte exchange within the unaligned half-word of each source word If the source data width is shorter than a word, this bit is ignored. If the source data width is a word:
bits : 13 - 13 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no byte-based exchange within the unaligned half-word of each source word
0x1 : B_0x1
the two consecutive bytes within the unaligned half-word of each source word are exchanged.
End of enumeration elements list.
SAP : source allocated port This bit is used to allocate the master port for the source transfer Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 14 - 14 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
SSEC : security attribute of the GPDMA transfer from the source If GPDMA_SECCFGR.SECx = 1 and the access is secure: This is a secure register bit. This bit can only be read by a secure software. This bit must be written by a secure software when GPDMA_SECCFGR.SECx =1 . A secure write is ignored when GPDMA_SECCFGR.SECx = 0. When GPDMA_SECCFGR.SECx is de-asserted, this SSEC bit is also de-asserted by hardware (on a secure reconfiguration of the channel as non-secure), and the GPDMA transfer from the source is non-secure.
bits : 15 - 15 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
GPDMA transfer non-secure
0x1 : B_0x1
GPDMA transfer secure
End of enumeration elements list.
DDW_LOG2 : binary logarithm of the destination data width of a burst, in bytes Note: Setting a 8-byte data width causes a user setting error to be reported and none transfer is issued. A destination burst transfer must have an aligned address with its data width (start address GPDMA_CxDAR[2:0] and address offset GPDMA_CxTR3.DAO[2:0], versus DDW_LOG2[1:0]). Otherwise a user setting error is reported and no transfer is issued.
bits : 16 - 17 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
byte
0x1 : B_0x1
half-word (2 bytes)
0x2 : B_0x2
word (4 bytes)
0x3 : B_0x3
user setting error reported and no transfer issued
End of enumeration elements list.
DINC : destination incrementing burst The destination address, pointed by GPDMA_CxDAR, is kept constant after a burst beat/single transfer, or is incremented by the offset value corresponding to a contiguous data after a burst beat/single transfer.
bits : 19 - 19 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
fixed burst
0x1 : B_0x1
contiguously incremented burst
End of enumeration elements list.
DBL_1 : destination burst length minus 1, between 0 and 63 The burst length unit is one data named beat within a burst. If DBL_1[5:0] =0 , the burst can be named as single. Each data/beat has a width defined by the destination data width DDW_LOG2[1:0]. Note: If a burst transfer crossed a 1-Kbyte address boundary on a AHB transfer, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the AHB protocol. If a burst transfer is of length greater than the FIFO size of the channel x, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the FIFO size. Transfer performance is lower, with GPDMA re-arbitration between effective and lower bursts/singles, but the data integrity is guaranteed.
bits : 20 - 25 (6 bit)
access : read-write
DBX : destination byte exchange If the destination data size is a byte, this bit is ignored. If the destination data size is not a byte:
bits : 26 - 26 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no byte-based exchange within half-word
0x1 : B_0x1
the two consecutive (post PAM) bytes are exchanged in each destination half-word.
End of enumeration elements list.
DHX : destination half-word exchange If the destination data size is shorter than a word, this bit is ignored. If the destination data size is a word:
bits : 27 - 27 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no halfword-based exchanged within word
0x1 : B_0x1
the two consecutive (post PAM) half-words are exchanged in each destination word.
End of enumeration elements list.
DAP : destination allocated port This bit is used to allocate the master port for the destination transfer Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
DSEC : security attribute of the GPDMA transfer to the destination If GPDMA_SECCFGR.SECx = 1 and the access is secure: This is a secure register bit. This bit can only be read by a secure software. This bit must be written by a secure software when GPDMA_SECCFGR.SECx = 1. A secure write is ignored when GPDMA_SECCFGR.SECx = 0. When GPDMA_SECCFGR.SECx is de-asserted, this DSEC bit is also de-asserted by hardware (on a secure reconfiguration of the channel as non-secure), and the GPDMA transfer to the destination is non-secure.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
GPDMA transfer non-secure
0x1 : B_0x1
GPDMA transfer secure
End of enumeration elements list.
GPDMA channel 6 transfer register 2
address_offset : 0x394 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
REQSEL : GPDMA hardware request selection These bits are ignored if channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer). Else, the selected hardware request is internally taken into account as per . The user must not assign a same input hardware request (same REQSEL[6:0] value) to different active GPDMA channels (GPDMA_CxCR.EN = 1 and GPDMA_CxTR2.SWREQ = 0 for these channels). GPDMA is not intended to hardware support the case of simultaneous enabled channels incorrectly configured with a same hardware peripheral request signal, and there is no user setting error reporting.
bits : 0 - 6 (7 bit)
access : read-write
SWREQ : software request This bit is internally taken into account when GPDMA_CxCR.EN is asserted.
bits : 9 - 9 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no software request. The selected hardware request REQSEL[6:0] is taken into account.
0x1 : B_0x1
software request for a memory-to-memory transfer. The default selected hardware request as per REQSEL[6:0] is ignored.
End of enumeration elements list.
DREQ : destination hardware request This bit is ignored if channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer). Else: Note:
bits : 10 - 10 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
selected hardware request driven by a source peripheral (request signal taken into account by the GPDMA transfer scheduler over the source/read port)
0x1 : B_0x1
selected hardware request driven by a destination peripheral (request signal taken into account by the GPDMA transfer scheduler over the destination/write port)
End of enumeration elements list.
BREQ : Block hardware request If the channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer), this bit is ignored. Else:
bits : 11 - 11 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
the selected hardware request is driven by a peripheral with a hardware request/acknowledge protocol at a burst level.
0x1 : B_0x1
the selected hardware request is driven by a peripheral with a hardware request/acknowledge protocol at a block level (see ).
End of enumeration elements list.
TRIGM : trigger mode These bits define the transfer granularity for its conditioning by the trigger. If the channel x is enabled (GPDMA_CxCR.EN asserted) with TRIGPOL[1:0] = 00 or 11, these TRIGM[1:0] bits are ignored. Else, a GPDMA transfer is conditioned by at least one trigger hit: first burst read of a 2D/repeated block transfer is conditioned by one hit trigger. – If the peripheral is programmed as a source (DREQ = 0) of the LLI data transfer, each programmed burst read is conditioned. – If the peripheral is programmed as a destination (DREQ = 1) of the LLI data transfer, each programmed burst write is conditioned. The first memory burst read of a (possibly 2D/repeated) block, also named as the first ready FIFO-based source burst, is gated by the occurrence of both the hardware request and the first trigger hit. The GPDMA monitoring of a trigger for channel x is started when the channel is enabled/loaded with a new active trigger configuration: rising or falling edge on a selected trigger (TRIGPOL[1:0] = 01 or respectively TRIGPOL[1:0] = 10). The monitoring of this trigger is kept active during the triggered and uncompleted (data or link) transfer and if a new trigger is detected then, this hit is internally memorized to grant the next transfer, as long as the defined rising or falling edge is not modified, and the TRIGSEL[5:0] is not modified, and the channel is enabled. Transferring a next LLIn+1 that updates the GPDMA_CxTR2 with a new value for any of TRIGSEL[5:0] or TRIGPOL[1:0], resets the monitoring, trashing the memorized hit of the formerly defined LLIn trigger. After a first new trigger hitn+1 is memorized, if another second trigger hitn+2 is detected and if the hitn triggered transfer is still not completed, hitn+2 is lost and not memorized.memorized. A trigger overrun flag is reported (GPDMA_CxSR.TOF =1 ), and an interrupt is generated if enabled (GPDMA_CxCR.TOIE = 1). The channel is not automatically disabled by hardware due to a trigger overrun. Note: When the source block size is not a multiple of the source burst size and is a multiple of the source data width, then the last programmed source burst is not completed and is internally shorten to match the block size. In this case, if TRIGM[1:0] = 11 and (SWREQ =1 or (SWREQ = 0 and DREQ =0 )), the shortened burst transfer (by singles or/and by bursts of lower length) is conditioned once by the trigger. When the programmed destination burst is internally shortened by singles or/and by bursts of lower length (versus FIFO size, versus block size, 1-Kbyte boundary address crossing): if the trigger is conditioning the programmed destination burst (if TRIGM[1:0] = 11 and SWREQ = 0 and DREQ = 1), this shortened destination burst transfer is conditioned once by the trigger.
bits : 14 - 15 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at block level: the first burst read of each block transfer is conditioned by one hit trigger (channel x = 12 to 15, for each block if a 2D/repeated block is configured with GPDMA_CxBR1.BRC[10:0] ≠ 0).
0x1 : B_0x1
channel x = 0 to 11, same as 00 channel x=12 to 15, at 2D/repeated block level, the
0x2 : B_0x2
at link level: a LLI link transfer is conditioned by one hit trigger. The LLI data transfer (if any) is not conditioned.
0x3 : B_0x3
at programmed burst level: If SWREQ = 1, each programmed burst read is conditioned by one hit trigger. If SWREQ = 0, each programmed burst that is requested by the selected peripheral, is conditioned by one hit trigger.
End of enumeration elements list.
TRIGSEL : trigger event input selection These bits select the trigger event input of the GPDMA transfer (as per ), with an active trigger event if TRIGPOL[1:0] ≠ 00.
bits : 16 - 21 (6 bit)
access : read-write
TRIGPOL : trigger event polarity These bits define the polarity of the selected trigger event input defined by TRIGSEL[5:0].
bits : 24 - 25 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no trigger (masked trigger event)
0x1 : B_0x1
trigger on the rising edge
0x2 : B_0x2
trigger on the falling edge
0x3 : B_0x3
same as 00
End of enumeration elements list.
TCEM : transfer complete event mode These bits define the transfer granularity for the transfer complete and half transfer complete events generation. Note: If the initial LLI0 data transfer is null/void (directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] = 0), then neither the complete transfer event nor the half transfer event is generated. Note: If the initial LLI0 data transfer is null/void (directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] = 0), then neither the complete transfer event nor the half transfer event is generated. Note: If the initial LLI0 data transfer is null/void (i.e. directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] =0 ), then the half transfer event is not generated, and the transfer complete event is generated when is completed the loading of the LLI1.
bits : 30 - 31 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at block level (when GPDMA_CxBR1.BNDT[15:0] = 0): the complete (and the half) transfer event is generated at the (respectively half of the) end of a block.
0x1 : B_0x1
channel x = 0 to 11, same as 00 channel x=12 to 15, at 2D/repeated block level (when GPDMA_CxBR1.BRC[10:0] = 0 and GPDMA_CxBR1.BNDT[15:0] = 0), the complete (and the half) transfer event is generated at the end (respectively half of the end) of the 2D/repeated block.
0x2 : B_0x2
at LLI level: the complete transfer event is generated at the end of the LLI transfer, including the update of the LLI if any. The half transfer event is generated at the half of the LLI data transfer (the LLI data transfer being a block transfer or a 2D/repeated block transfer for channel x = 12 to 15), if any data transfer.
0x3 : B_0x3
at channel level: the complete transfer event is generated at the end of the last LLI transfer. The half transfer event is generated at the half of the data transfer of the last LLI. The last LLI updates the link address GPDMA_CxLLR.LA[15:2] to zero and clears all the GPDMA_CxLLR update bits (UT1, UT2, UB1, USA, UDA and ULL, plus UT3 and UB2 if present). If the channel transfer is continuous/infinite, no event is generated.
End of enumeration elements list.
GPDMA channel 6 block register 1
address_offset : 0x398 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
BNDT : block number of data bytes to transfer from the source Block size transferred from the source. When the channel is enabled, this field becomes read-only and is decremented, indicating the remaining number of data items in the current source block to be transferred. BNDT[15:0] is programmed in number of bytes, maximum source block size is 64 Kbytes -1. Once the last data transfer is completed (BNDT[15:0] = 0): - if GPDMA_CxLLR.UB1 = 1, this field is updated by the LLI in the memory. - if GPDMA_CxLLR.UB1 = 0 and if there is at least one non null Uxx update bit, this field is internally restored to the programmed value. - if all GPDMA_CxLLR.Uxx = 0 and if GPDMA_CxLLR.LA[15:0] = 0, this field is internally restored to the programmed value (infinite/continuous last LLI). - if GPDMA_CxLLR = 0, this field is kept as zero following the last LLI data transfer. Note: A non-null source block size must be a multiple of the source data width (BNDT[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued. When configured in packing mode (GPDMA_CxTR1.PAM[1] = 1 and destination data width different from source data width), a non-null source block size must be a multiple of the destination data width (BNDT[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued.
bits : 0 - 15 (16 bit)
access : read-write
GPDMA channel 6 source address register
address_offset : 0x39C Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SA : source address This field is the pointer to the address from which the next data is read. During the channel activity, depending on the source addressing mode (GPDMA_CxTR1.SINC), this field is kept fixed or incremented by the data width (GPDMA_CxTR1.SDW_LOG2[1:0]) after each single source data, reflecting the next address from which data is read. During the channel activity, this address is updated after each completed source burst, consequently to: the programmed source burst either in fixed addressing mode or in contiguous-data incremented mode. If contiguously incremented (GPDMA_CxTR1.SINC = 1), then the additional address offset value is the programmed burst size, as defined by GPDMA_CxTR1.SBL_1[5:0] and GPDMA_CxTR1.SDW_LOG2[21:0] the additional source incremented/decremented offset value as programmed by GPDMA_CxBR1.SDEC and GPDMA_CxTR3.SAO[12:0] once/if completed source block transfer, for a channel x with 2D addressing capability (x = 12 to 15). additional block repeat source incremented/decremented offset value as programmed by GPDMA_CxBR1.BRSDEC and GPDMA_CxBR2.BRSAO[15:0] In linked-list mode, after a LLI data transfer is completed, this register is automatically updated by GPDMA from the memory, provided the LLI is set with GPDMA_CxLLR.USA = 1. Note: A source address must be aligned with the programmed data width of a source single (SA[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued. When the source block size is not a multiple of the source burst size and is a multiple of the source data width, the last programmed source burst is not completed and is internally shorten to match the block size. In this case, the additional GPDMA_CxTR3.SAO[12:0] is not applied.
bits : 0 - 31 (32 bit)
access : read-write
GPDMA channel 6 destination address register
address_offset : 0x3A0 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
DA : destination address This field is the pointer to the address from which the next data is written. During the channel activity, depending on the destination addressing mode (GPDMA_CxTR1.DINC), this field is kept fixed or incremented by the data width (GPDMA_CxTR1.DDW_LOG2[21:0]) after each single destination data, reflecting the next address from which data is written. During the channel activity, this address is updated after each completed destination burst, consequently to: the programmed destination burst either in fixed addressing mode or in contiguous-data incremented mode. If contiguously incremented (GPDMA_CxTR1.DINC = 1), then the additional address offset value is the programmed burst size, as defined by GPDMA_CxTR1.DBL_1[5:0] and GPDMA_CxTR1.DDW_LOG2[1:0] the additional destination incremented/decremented offset value as programmed by GPDMA_CxBR1.DDEC and GPDMA_CxTR3.DAO[12:0] once/if completed destination block transfer, for a channel x with 2D addressing capability (x = 12 to 15), the additional block repeat destination incremented/decremented offset value as programmed by GPDMA_CxBR1.BRDDEC and GPDMA_CxBR2.BRDAO[15:0] In linked-list mode, after a LLI data transfer is completed, this register is automatically updated by the GPDMA from the memory, provided the LLI is set with GPDMA_CxLLR.UDA = 1. Note: A destination address must be aligned with the programmed data width of a destination burst (DA[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued.
bits : 0 - 31 (32 bit)
access : read-write
GPDMA channel 6 linked-list address register
address_offset : 0x3CC Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
LA : pointer (16-bit low-significant address) to the next linked-list data structure If UT1 = UT2 = UB1 = USA = UDA = ULL = 0 and if LA[15:20] = 0, the current LLI is the last one. The channel transfer is completed without any update of the linked-list GPDMA register file. Else, this field is the pointer to the memory address offset from which the next linked-list data structure is automatically fetched from, once the data transfer is completed, in order to conditionally update the linked-list GPDMA internal register file (GPDMA_CxCTR1, GPDMA_CxTR2, GPDMA_CxBR1, GPDMA_CxSAR, GPDMA_CxDAR and GPDMA_CxLLR). Note: The user must program the pointer to be 32-bit aligned. The two low-significant bits are write ignored.
bits : 2 - 15 (14 bit)
access : read-write
ULL : Update GPDMA_CxLLR register from memory This bit is used to control the update of GPDMA_CxLLR from the memory during the link transfer.
bits : 16 - 16 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxLLR update
0x1 : B_0x1
GPDMA_CxLLR update
End of enumeration elements list.
UDA : Update GPDMA_CxDAR register from memory This bit is used to control the update of GPDMA_CxDAR from the memory during the link transfer.
bits : 27 - 27 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxDAR update
0x1 : B_0x1
GPDMA_CxDAR update
End of enumeration elements list.
USA : update GPDMA_CxSAR from memory This bit controls the update of GPDMA_CxSAR from the memory during the link transfer.
bits : 28 - 28 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxSAR update
0x1 : B_0x1
GPDMA_CxSAR update
End of enumeration elements list.
UB1 : Update GPDMA_CxBR1 from memory This bit controls the update of GPDMA_CxBR1 from the memory during the link transfer. If UB1 = 0 and if GPDMA_CxLLR ≠ 0, the linked-list is not completed. GPDMA_CxBR1.BNDT[15:0] is then restored to the programmed value after data transfer is completed and before the link transfer.
bits : 29 - 29 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxBR1 update from memory (GPDMA_CxBR1.BNDT[15:0] restored if any link transfer)
0x1 : B_0x1
GPDMA_CxBR1 update
End of enumeration elements list.
UT2 : Update GPDMA_CxTR2 from memory This bit controls the update of GPDMA_CxTR2 from the memory during the link transfer.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR2 update
0x1 : B_0x1
GPDMA_CxTR2 update
End of enumeration elements list.
UT1 : Update GPDMA_CxTR1 from memory This bit controls the update of GPDMA_CxTR1 from the memory during the link transfer.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR1 update
0x1 : B_0x1
GPDMA_CxTR1 update
End of enumeration elements list.
GPDMA channel 7 linked-list base address register
address_offset : 0x3D0 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
LBA : linked-list base address of GPDMA channel x
bits : 16 - 31 (16 bit)
access : read-write
GPDMA channel 7 flag clear register
address_offset : 0x3DC Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
TCF : transfer complete flag clear
bits : 8 - 8 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding TCF flag cleared
End of enumeration elements list.
HTF : half transfer flag clear
bits : 9 - 9 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding HTF flag cleared
End of enumeration elements list.
DTEF : data transfer error flag clear
bits : 10 - 10 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding DTEF flag cleared
End of enumeration elements list.
ULEF : update link transfer error flag clear
bits : 11 - 11 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding ULEF flag cleared
End of enumeration elements list.
USEF : user setting error flag clear
bits : 12 - 12 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding USEF flag cleared
End of enumeration elements list.
SUSPF : completed suspension flag clear
bits : 13 - 13 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding SUSPF flag cleared
End of enumeration elements list.
TOF : trigger overrun flag clear
bits : 14 - 14 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding TOF flag cleared
End of enumeration elements list.
GPDMA channel 7 status register
address_offset : 0x3E0 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
IDLEF : idle flag This idle flag is de-asserted by hardware when the channel is enabled (GPDMA_CxCR.EN = 1) with a valid channel configuration (no USEF to be immediately reported). This idle flag is asserted after hard reset or by hardware when the channel is back in idle state (in suspended or disabled state).
bits : 0 - 0 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
channel not in idle state
0x1 : B_0x1
channel in idle state
End of enumeration elements list.
TCF : transfer complete flag A transfer complete event is either a block transfer complete, a 2D/repeated block transfer complete, a LLI transfer complete including the upload of the next LLI if any, or the full linked-list completion, depending on the transfer complete event mode (GPDMA_CxTR2.TCEM[1:0]).
bits : 8 - 8 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no transfer complete event
0x1 : B_0x1
a transfer complete event occurred
End of enumeration elements list.
HTF : half transfer flag An half transfer event is either an half block transfer or an half 2D/repeated block transfer, depending on the transfer complete event mode (GPDMA_CxTR2.TCEM[1:0]). An half block transfer occurs when half of the bytes of the source block size (rounded up integer of GPDMA_CxBR1.BNDT[15:0]/2) has been transferred to the destination. An half 2D/repeated block transfer occurs when half of the repeated blocks (rounded up integer of (GPDMA_CxBR1.BRC[10:0]+1)/2)) has been transferred to the destination.
bits : 9 - 9 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no half transfer event
0x1 : B_0x1
an half transfer event occurred
End of enumeration elements list.
DTEF : data transfer error flag
bits : 10 - 10 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no data transfer error event
0x1 : B_0x1
a master bus error event occurred on a data transfer
End of enumeration elements list.
ULEF : update link transfer error flag
bits : 11 - 11 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no update link transfer error event
0x1 : B_0x1
a master bus error event occurred while updating a linked-list register from memory
End of enumeration elements list.
USEF : user setting error flag
bits : 12 - 12 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no user setting error event
0x1 : B_0x1
a user setting error event occurred
End of enumeration elements list.
SUSPF : completed suspension flag
bits : 13 - 13 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no completed suspension event
0x1 : B_0x1
a completed suspension event occurred
End of enumeration elements list.
TOF : trigger overrun flag
bits : 14 - 14 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no trigger overrun event
0x1 : B_0x1
a trigger overrun event occurred
End of enumeration elements list.
FIFOL : monitored FIFO level Number of available write beats in the FIFO, in units of the programmed destination data width (see GPDMA_CxTR1.DDW_LOG2[1:0], in units of bytes, half-words, or words). Note: After having suspended an active transfer, the user may need to read FIFOL[7:0], additionally to GPDMA_CxBR1.BDNT[15:0] and GPDMA_CxBR1.BRC[10:0], to know how many data have been transferred to the destination. Before reading, the user may wait for the transfer to be suspended (GPDMA_CxSR.SUSPF = 1).
bits : 16 - 23 (8 bit)
access : read-only
GPDMA channel 7 control register
address_offset : 0x3E4 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
EN : enable Writing 1 into the field RESET (bit 1) causes the hardware to de-assert this bit, whatever is written into this bit 0. Else: this bit is de-asserted by hardware when there is a transfer error (master bus error or user setting error) or when there is a channel transfer complete (channel ready to be configured, e.g. if LSM=1 at the end of a single execution of the LLI). Else, this bit can be asserted by software. Writing 0 into this EN bit is ignored.
bits : 0 - 0 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
write: ignored, read: channel disabled
0x1 : B_0x1
write: enable channel, read: channel enabled
End of enumeration elements list.
RESET : reset This bit is write only. Writing 0 has no impact. Writing 1 implies the reset of the following: the FIFO, the channel internal state, SUSP and EN bits (whatever is written receptively in bit 2 and bit 0). The reset is effective when the channel is in steady state, meaning one of the following: - active channel in suspended state (GPDMA_CxSR.SUSPF = 1 and GPDMA_CxSR.IDLEF = GPDMA_CxCR.EN = 1) - channel in disabled state (GPDMA_CxSR.IDLEF = 1 and GPDMA_CxCR.EN = 0). After writing a RESET, to continue using this channel, the user must explicitly reconfigure the channel including the hardware-modified configuration registers (GPDMA_CxBR1, GPDMA_CxSAR and GPDMA_CxDAR) before enabling again the channel (see the programming sequence in ).
bits : 1 - 1 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no channel reset
0x1 : B_0x1
channel reset
End of enumeration elements list.
SUSP : suspend Writing 1 into the field RESET (bit 1) causes the hardware to de-assert this bit, whatever is written into this bit 2. Else: Software must write 1 in order to suspend an active channel i.e. a channel with an on-going GPDMA transfer over its master ports. The software must write 0 in order to resume a suspended channel, following the programming sequence detailed in .
bits : 2 - 2 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
write: resume channel, read: channel not suspended
0x1 : B_0x1
write: suspend channel, read: channel suspended.
End of enumeration elements list.
TCIE : transfer complete interrupt enable
bits : 8 - 8 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
HTIE : half transfer complete interrupt enable
bits : 9 - 9 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
DTEIE : data transfer error interrupt enable
bits : 10 - 10 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
ULEIE : update link transfer error interrupt enable
bits : 11 - 11 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
USEIE : user setting error interrupt enable
bits : 12 - 12 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
SUSPIE : completed suspension interrupt enable
bits : 13 - 13 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
TOIE : trigger overrun interrupt enable
bits : 14 - 14 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
LSM : Link step mode First the (possible 1D/repeated) block transfer is executed as defined by the current internal register file until GPDMA_CxBR1.BNDT[15:0] = 0 and GPDMA_CxBR1.BRC[10:0] = 0 if present. Secondly the next linked-list data structure is conditionally uploaded from memory as defined by GPDMA_CxLLR. Then channel execution is completed. Note: This bit must be written when EN=0. This bit is read-only when EN=1.
bits : 16 - 16 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
channel executed for the full linked-list and completed at the end of the last LLI (GPDMA_CxLLR = 0). The 16 low-significant bits of the link address are null (LA[15:0] = 0) and all the update bits are null (UT1 =UB1 = UT2 = USA = UDA = ULL = 0 and UT3 = UB2 = 0 if present). Then GPDMA_CxBR1.BNDT[15:0] = 0 and GPDMA_CxBR1.BRC[10:0] = 0 if present.
0x1 : B_0x1
channel executed once for the current LLI
End of enumeration elements list.
LAP : linked-list allocated port This bit is used to allocate the master port for the update of the GPDMA linked-list registers from the memory. Note: This bit must be written when EN=0. This bit is read-only when EN=1.
bits : 17 - 17 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
PRIO : priority level of the channel x GPDMA transfer versus others Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 22 - 23 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
low priority, low weight
0x1 : B_0x1
low priority, mid weight
0x2 : B_0x2
low priority, high weight
0x3 : B_0x3
high priority
End of enumeration elements list.
GPDMA privileged configuration register
address_offset : 0x4 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
PRIV0 : PRIV0
bits : 0 - 0 (1 bit)
access : read-write
PRIV1 : PRIV1
bits : 1 - 1 (1 bit)
access : read-write
PRIV2 : PRIV2
bits : 2 - 2 (1 bit)
access : read-write
PRIV3 : PRIV3
bits : 3 - 3 (1 bit)
access : read-write
PRIV4 : PRIV4
bits : 4 - 4 (1 bit)
access : read-write
PRIV5 : PRIV5
bits : 5 - 5 (1 bit)
access : read-write
PRIV6 : PRIV6
bits : 6 - 6 (1 bit)
access : read-write
PRIV7 : PRIV7
bits : 7 - 7 (1 bit)
access : read-write
PRIV8 : PRIV8
bits : 8 - 8 (1 bit)
access : read-write
PRIV9 : PRIV9
bits : 9 - 9 (1 bit)
access : read-write
PRIV10 : PRIV10
bits : 10 - 10 (1 bit)
access : read-write
PRIV11 : PRIV11
bits : 11 - 11 (1 bit)
access : read-write
PRIV12 : PRIV12
bits : 12 - 12 (1 bit)
access : read-write
PRIV13 : PRIV13
bits : 13 - 13 (1 bit)
access : read-write
PRIV14 : PRIV14
bits : 14 - 14 (1 bit)
access : read-write
PRIV15 : PRIV15
bits : 15 - 15 (1 bit)
access : read-write
GPDMA channel 7 transfer register 1
address_offset : 0x410 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SDW_LOG2 : binary logarithm of the source data width of a burst in bytes Note: Setting a 8-byte data width causes a user setting error to be reported and no transfer is issued. A source block size must be a multiple of the source data width (GPDMA_CxBR1.BNDT[2:0] versus SDW_LOG2[1:0]). Otherwise, a user setting error is reported and no transfer is issued. A source single transfer must have an aligned address with its data width (start address GPDMA_CxSAR[2:0] versus SDW_LOG2[1:0]). Otherwise, a user setting error is reported and none transfer is issued.
bits : 0 - 1 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
byte
0x1 : B_0x1
half-word (2 bytes)
0x2 : B_0x2
word (4 bytes)
0x3 : B_0x3
user setting error reported and no transfer issued
End of enumeration elements list.
SINC : source incrementing burst The source address, pointed by GPDMA_CxSAR, is kept constant after a burst beat/single transfer or is incremented by the offset value corresponding to a contiguous data after a burst beat/single transfer.
bits : 3 - 3 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
fixed burst
0x1 : B_0x1
contiguously incremented burst
End of enumeration elements list.
SBL_1 : source burst length minus 1, between 0 and 63 The burst length unit is one data named beat within a burst. If SBL_1[5:0] =0 , the burst can be named as single. Each data/beat has a width defined by the destination data width SDW_LOG2[1:0]. Note: If a burst transfer crossed a 1-Kbyte address boundary on a AHB transfer, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the AHB protocol. If a burst transfer is of length greater than the FIFO size of the channel x, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the FIFO size. Transfer performance is lower, with GPDMA re-arbitration between effective and lower bursts/singles, but the data integrity is guaranteed.
bits : 4 - 9 (6 bit)
access : read-write
PAM : padding/alignment mode If DDW_LOG2[1:0] = SDW_LOG2[1:0]: if the data width of a burst destination transfer is equal to the data width of a burst source transfer, these bits are ignored. Else: - Case 1: If destination data width > source data width 1x: successive source data are FIFO queued and packed at the destination data width, in a left (LSB) to right (MSB) order (named little endian), before a destination transfer - Case 2: If destination data width < source data width 1x: source data is FIFO queued and unpacked at the destination data width, to be transferred in a left (LSB) to right (MSB) order (named little endian) to the destination Note:
bits : 11 - 12 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
source data is transferred as right aligned, left-truncated down to the destination data width
0x1 : B_0x1
source data is transferred as left-aligned, right-truncated down to the destination data width
0x0 : B_0x0
source data is transferred as right aligned, left-truncated down to the destination data width
0x1 : B_0x1
source data is transferred as left-aligned, right-truncated down to the destination data width
End of enumeration elements list.
SBX : source byte exchange within the unaligned half-word of each source word If the source data width is shorter than a word, this bit is ignored. If the source data width is a word:
bits : 13 - 13 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no byte-based exchange within the unaligned half-word of each source word
0x1 : B_0x1
the two consecutive bytes within the unaligned half-word of each source word are exchanged.
End of enumeration elements list.
SAP : source allocated port This bit is used to allocate the master port for the source transfer Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 14 - 14 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
SSEC : security attribute of the GPDMA transfer from the source If GPDMA_SECCFGR.SECx = 1 and the access is secure: This is a secure register bit. This bit can only be read by a secure software. This bit must be written by a secure software when GPDMA_SECCFGR.SECx =1 . A secure write is ignored when GPDMA_SECCFGR.SECx = 0. When GPDMA_SECCFGR.SECx is de-asserted, this SSEC bit is also de-asserted by hardware (on a secure reconfiguration of the channel as non-secure), and the GPDMA transfer from the source is non-secure.
bits : 15 - 15 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
GPDMA transfer non-secure
0x1 : B_0x1
GPDMA transfer secure
End of enumeration elements list.
DDW_LOG2 : binary logarithm of the destination data width of a burst, in bytes Note: Setting a 8-byte data width causes a user setting error to be reported and none transfer is issued. A destination burst transfer must have an aligned address with its data width (start address GPDMA_CxDAR[2:0] and address offset GPDMA_CxTR3.DAO[2:0], versus DDW_LOG2[1:0]). Otherwise a user setting error is reported and no transfer is issued.
bits : 16 - 17 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
byte
0x1 : B_0x1
half-word (2 bytes)
0x2 : B_0x2
word (4 bytes)
0x3 : B_0x3
user setting error reported and no transfer issued
End of enumeration elements list.
DINC : destination incrementing burst The destination address, pointed by GPDMA_CxDAR, is kept constant after a burst beat/single transfer, or is incremented by the offset value corresponding to a contiguous data after a burst beat/single transfer.
bits : 19 - 19 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
fixed burst
0x1 : B_0x1
contiguously incremented burst
End of enumeration elements list.
DBL_1 : destination burst length minus 1, between 0 and 63 The burst length unit is one data named beat within a burst. If DBL_1[5:0] =0 , the burst can be named as single. Each data/beat has a width defined by the destination data width DDW_LOG2[1:0]. Note: If a burst transfer crossed a 1-Kbyte address boundary on a AHB transfer, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the AHB protocol. If a burst transfer is of length greater than the FIFO size of the channel x, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the FIFO size. Transfer performance is lower, with GPDMA re-arbitration between effective and lower bursts/singles, but the data integrity is guaranteed.
bits : 20 - 25 (6 bit)
access : read-write
DBX : destination byte exchange If the destination data size is a byte, this bit is ignored. If the destination data size is not a byte:
bits : 26 - 26 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no byte-based exchange within half-word
0x1 : B_0x1
the two consecutive (post PAM) bytes are exchanged in each destination half-word.
End of enumeration elements list.
DHX : destination half-word exchange If the destination data size is shorter than a word, this bit is ignored. If the destination data size is a word:
bits : 27 - 27 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no halfword-based exchanged within word
0x1 : B_0x1
the two consecutive (post PAM) half-words are exchanged in each destination word.
End of enumeration elements list.
DAP : destination allocated port This bit is used to allocate the master port for the destination transfer Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
DSEC : security attribute of the GPDMA transfer to the destination If GPDMA_SECCFGR.SECx = 1 and the access is secure: This is a secure register bit. This bit can only be read by a secure software. This bit must be written by a secure software when GPDMA_SECCFGR.SECx = 1. A secure write is ignored when GPDMA_SECCFGR.SECx = 0. When GPDMA_SECCFGR.SECx is de-asserted, this DSEC bit is also de-asserted by hardware (on a secure reconfiguration of the channel as non-secure), and the GPDMA transfer to the destination is non-secure.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
GPDMA transfer non-secure
0x1 : B_0x1
GPDMA transfer secure
End of enumeration elements list.
GPDMA channel 7 transfer register 2
address_offset : 0x414 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
REQSEL : GPDMA hardware request selection These bits are ignored if channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer). Else, the selected hardware request is internally taken into account as per . The user must not assign a same input hardware request (same REQSEL[6:0] value) to different active GPDMA channels (GPDMA_CxCR.EN = 1 and GPDMA_CxTR2.SWREQ = 0 for these channels). GPDMA is not intended to hardware support the case of simultaneous enabled channels incorrectly configured with a same hardware peripheral request signal, and there is no user setting error reporting.
bits : 0 - 6 (7 bit)
access : read-write
SWREQ : software request This bit is internally taken into account when GPDMA_CxCR.EN is asserted.
bits : 9 - 9 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no software request. The selected hardware request REQSEL[6:0] is taken into account.
0x1 : B_0x1
software request for a memory-to-memory transfer. The default selected hardware request as per REQSEL[6:0] is ignored.
End of enumeration elements list.
DREQ : destination hardware request This bit is ignored if channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer). Else: Note:
bits : 10 - 10 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
selected hardware request driven by a source peripheral (request signal taken into account by the GPDMA transfer scheduler over the source/read port)
0x1 : B_0x1
selected hardware request driven by a destination peripheral (request signal taken into account by the GPDMA transfer scheduler over the destination/write port)
End of enumeration elements list.
BREQ : Block hardware request If the channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer), this bit is ignored. Else:
bits : 11 - 11 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
the selected hardware request is driven by a peripheral with a hardware request/acknowledge protocol at a burst level.
0x1 : B_0x1
the selected hardware request is driven by a peripheral with a hardware request/acknowledge protocol at a block level (see ).
End of enumeration elements list.
TRIGM : trigger mode These bits define the transfer granularity for its conditioning by the trigger. If the channel x is enabled (GPDMA_CxCR.EN asserted) with TRIGPOL[1:0] = 00 or 11, these TRIGM[1:0] bits are ignored. Else, a GPDMA transfer is conditioned by at least one trigger hit: first burst read of a 2D/repeated block transfer is conditioned by one hit trigger. – If the peripheral is programmed as a source (DREQ = 0) of the LLI data transfer, each programmed burst read is conditioned. – If the peripheral is programmed as a destination (DREQ = 1) of the LLI data transfer, each programmed burst write is conditioned. The first memory burst read of a (possibly 2D/repeated) block, also named as the first ready FIFO-based source burst, is gated by the occurrence of both the hardware request and the first trigger hit. The GPDMA monitoring of a trigger for channel x is started when the channel is enabled/loaded with a new active trigger configuration: rising or falling edge on a selected trigger (TRIGPOL[1:0] = 01 or respectively TRIGPOL[1:0] = 10). The monitoring of this trigger is kept active during the triggered and uncompleted (data or link) transfer and if a new trigger is detected then, this hit is internally memorized to grant the next transfer, as long as the defined rising or falling edge is not modified, and the TRIGSEL[5:0] is not modified, and the channel is enabled. Transferring a next LLIn+1 that updates the GPDMA_CxTR2 with a new value for any of TRIGSEL[5:0] or TRIGPOL[1:0], resets the monitoring, trashing the memorized hit of the formerly defined LLIn trigger. After a first new trigger hitn+1 is memorized, if another second trigger hitn+2 is detected and if the hitn triggered transfer is still not completed, hitn+2 is lost and not memorized.memorized. A trigger overrun flag is reported (GPDMA_CxSR.TOF =1 ), and an interrupt is generated if enabled (GPDMA_CxCR.TOIE = 1). The channel is not automatically disabled by hardware due to a trigger overrun. Note: When the source block size is not a multiple of the source burst size and is a multiple of the source data width, then the last programmed source burst is not completed and is internally shorten to match the block size. In this case, if TRIGM[1:0] = 11 and (SWREQ =1 or (SWREQ = 0 and DREQ =0 )), the shortened burst transfer (by singles or/and by bursts of lower length) is conditioned once by the trigger. When the programmed destination burst is internally shortened by singles or/and by bursts of lower length (versus FIFO size, versus block size, 1-Kbyte boundary address crossing): if the trigger is conditioning the programmed destination burst (if TRIGM[1:0] = 11 and SWREQ = 0 and DREQ = 1), this shortened destination burst transfer is conditioned once by the trigger.
bits : 14 - 15 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at block level: the first burst read of each block transfer is conditioned by one hit trigger (channel x = 12 to 15, for each block if a 2D/repeated block is configured with GPDMA_CxBR1.BRC[10:0] ≠ 0).
0x1 : B_0x1
channel x = 0 to 11, same as 00 channel x=12 to 15, at 2D/repeated block level, the
0x2 : B_0x2
at link level: a LLI link transfer is conditioned by one hit trigger. The LLI data transfer (if any) is not conditioned.
0x3 : B_0x3
at programmed burst level: If SWREQ = 1, each programmed burst read is conditioned by one hit trigger. If SWREQ = 0, each programmed burst that is requested by the selected peripheral, is conditioned by one hit trigger.
End of enumeration elements list.
TRIGSEL : trigger event input selection These bits select the trigger event input of the GPDMA transfer (as per ), with an active trigger event if TRIGPOL[1:0] ≠ 00.
bits : 16 - 21 (6 bit)
access : read-write
TRIGPOL : trigger event polarity These bits define the polarity of the selected trigger event input defined by TRIGSEL[5:0].
bits : 24 - 25 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no trigger (masked trigger event)
0x1 : B_0x1
trigger on the rising edge
0x2 : B_0x2
trigger on the falling edge
0x3 : B_0x3
same as 00
End of enumeration elements list.
TCEM : transfer complete event mode These bits define the transfer granularity for the transfer complete and half transfer complete events generation. Note: If the initial LLI0 data transfer is null/void (directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] = 0), then neither the complete transfer event nor the half transfer event is generated. Note: If the initial LLI0 data transfer is null/void (directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] = 0), then neither the complete transfer event nor the half transfer event is generated. Note: If the initial LLI0 data transfer is null/void (i.e. directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] =0 ), then the half transfer event is not generated, and the transfer complete event is generated when is completed the loading of the LLI1.
bits : 30 - 31 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at block level (when GPDMA_CxBR1.BNDT[15:0] = 0): the complete (and the half) transfer event is generated at the (respectively half of the) end of a block.
0x1 : B_0x1
channel x = 0 to 11, same as 00 channel x=12 to 15, at 2D/repeated block level (when GPDMA_CxBR1.BRC[10:0] = 0 and GPDMA_CxBR1.BNDT[15:0] = 0), the complete (and the half) transfer event is generated at the end (respectively half of the end) of the 2D/repeated block.
0x2 : B_0x2
at LLI level: the complete transfer event is generated at the end of the LLI transfer, including the update of the LLI if any. The half transfer event is generated at the half of the LLI data transfer (the LLI data transfer being a block transfer or a 2D/repeated block transfer for channel x = 12 to 15), if any data transfer.
0x3 : B_0x3
at channel level: the complete transfer event is generated at the end of the last LLI transfer. The half transfer event is generated at the half of the data transfer of the last LLI. The last LLI updates the link address GPDMA_CxLLR.LA[15:2] to zero and clears all the GPDMA_CxLLR update bits (UT1, UT2, UB1, USA, UDA and ULL, plus UT3 and UB2 if present). If the channel transfer is continuous/infinite, no event is generated.
End of enumeration elements list.
GPDMA channel 7 block register 1
address_offset : 0x418 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
BNDT : block number of data bytes to transfer from the source Block size transferred from the source. When the channel is enabled, this field becomes read-only and is decremented, indicating the remaining number of data items in the current source block to be transferred. BNDT[15:0] is programmed in number of bytes, maximum source block size is 64 Kbytes -1. Once the last data transfer is completed (BNDT[15:0] = 0): - if GPDMA_CxLLR.UB1 = 1, this field is updated by the LLI in the memory. - if GPDMA_CxLLR.UB1 = 0 and if there is at least one non null Uxx update bit, this field is internally restored to the programmed value. - if all GPDMA_CxLLR.Uxx = 0 and if GPDMA_CxLLR.LA[15:0] = 0, this field is internally restored to the programmed value (infinite/continuous last LLI). - if GPDMA_CxLLR = 0, this field is kept as zero following the last LLI data transfer. Note: A non-null source block size must be a multiple of the source data width (BNDT[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued. When configured in packing mode (GPDMA_CxTR1.PAM[1] = 1 and destination data width different from source data width), a non-null source block size must be a multiple of the destination data width (BNDT[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued.
bits : 0 - 15 (16 bit)
access : read-write
GPDMA channel 7 source address register
address_offset : 0x41C Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SA : source address This field is the pointer to the address from which the next data is read. During the channel activity, depending on the source addressing mode (GPDMA_CxTR1.SINC), this field is kept fixed or incremented by the data width (GPDMA_CxTR1.SDW_LOG2[1:0]) after each single source data, reflecting the next address from which data is read. During the channel activity, this address is updated after each completed source burst, consequently to: the programmed source burst either in fixed addressing mode or in contiguous-data incremented mode. If contiguously incremented (GPDMA_CxTR1.SINC = 1), then the additional address offset value is the programmed burst size, as defined by GPDMA_CxTR1.SBL_1[5:0] and GPDMA_CxTR1.SDW_LOG2[21:0] the additional source incremented/decremented offset value as programmed by GPDMA_CxBR1.SDEC and GPDMA_CxTR3.SAO[12:0] once/if completed source block transfer, for a channel x with 2D addressing capability (x = 12 to 15). additional block repeat source incremented/decremented offset value as programmed by GPDMA_CxBR1.BRSDEC and GPDMA_CxBR2.BRSAO[15:0] In linked-list mode, after a LLI data transfer is completed, this register is automatically updated by GPDMA from the memory, provided the LLI is set with GPDMA_CxLLR.USA = 1. Note: A source address must be aligned with the programmed data width of a source single (SA[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued. When the source block size is not a multiple of the source burst size and is a multiple of the source data width, the last programmed source burst is not completed and is internally shorten to match the block size. In this case, the additional GPDMA_CxTR3.SAO[12:0] is not applied.
bits : 0 - 31 (32 bit)
access : read-write
GPDMA channel 7 destination address register
address_offset : 0x420 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
DA : destination address This field is the pointer to the address from which the next data is written. During the channel activity, depending on the destination addressing mode (GPDMA_CxTR1.DINC), this field is kept fixed or incremented by the data width (GPDMA_CxTR1.DDW_LOG2[21:0]) after each single destination data, reflecting the next address from which data is written. During the channel activity, this address is updated after each completed destination burst, consequently to: the programmed destination burst either in fixed addressing mode or in contiguous-data incremented mode. If contiguously incremented (GPDMA_CxTR1.DINC = 1), then the additional address offset value is the programmed burst size, as defined by GPDMA_CxTR1.DBL_1[5:0] and GPDMA_CxTR1.DDW_LOG2[1:0] the additional destination incremented/decremented offset value as programmed by GPDMA_CxBR1.DDEC and GPDMA_CxTR3.DAO[12:0] once/if completed destination block transfer, for a channel x with 2D addressing capability (x = 12 to 15), the additional block repeat destination incremented/decremented offset value as programmed by GPDMA_CxBR1.BRDDEC and GPDMA_CxBR2.BRDAO[15:0] In linked-list mode, after a LLI data transfer is completed, this register is automatically updated by the GPDMA from the memory, provided the LLI is set with GPDMA_CxLLR.UDA = 1. Note: A destination address must be aligned with the programmed data width of a destination burst (DA[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued.
bits : 0 - 31 (32 bit)
access : read-write
GPDMA channel 7 linked-list address register
address_offset : 0x44C Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
LA : pointer (16-bit low-significant address) to the next linked-list data structure If UT1 = UT2 = UB1 = USA = UDA = ULL = 0 and if LA[15:20] = 0, the current LLI is the last one. The channel transfer is completed without any update of the linked-list GPDMA register file. Else, this field is the pointer to the memory address offset from which the next linked-list data structure is automatically fetched from, once the data transfer is completed, in order to conditionally update the linked-list GPDMA internal register file (GPDMA_CxCTR1, GPDMA_CxTR2, GPDMA_CxBR1, GPDMA_CxSAR, GPDMA_CxDAR and GPDMA_CxLLR). Note: The user must program the pointer to be 32-bit aligned. The two low-significant bits are write ignored.
bits : 2 - 15 (14 bit)
access : read-write
ULL : Update GPDMA_CxLLR register from memory This bit is used to control the update of GPDMA_CxLLR from the memory during the link transfer.
bits : 16 - 16 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxLLR update
0x1 : B_0x1
GPDMA_CxLLR update
End of enumeration elements list.
UDA : Update GPDMA_CxDAR register from memory This bit is used to control the update of GPDMA_CxDAR from the memory during the link transfer.
bits : 27 - 27 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxDAR update
0x1 : B_0x1
GPDMA_CxDAR update
End of enumeration elements list.
USA : update GPDMA_CxSAR from memory This bit controls the update of GPDMA_CxSAR from the memory during the link transfer.
bits : 28 - 28 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxSAR update
0x1 : B_0x1
GPDMA_CxSAR update
End of enumeration elements list.
UB1 : Update GPDMA_CxBR1 from memory This bit controls the update of GPDMA_CxBR1 from the memory during the link transfer. If UB1 = 0 and if GPDMA_CxLLR ≠ 0, the linked-list is not completed. GPDMA_CxBR1.BNDT[15:0] is then restored to the programmed value after data transfer is completed and before the link transfer.
bits : 29 - 29 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxBR1 update from memory (GPDMA_CxBR1.BNDT[15:0] restored if any link transfer)
0x1 : B_0x1
GPDMA_CxBR1 update
End of enumeration elements list.
UT2 : Update GPDMA_CxTR2 from memory This bit controls the update of GPDMA_CxTR2 from the memory during the link transfer.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR2 update
0x1 : B_0x1
GPDMA_CxTR2 update
End of enumeration elements list.
UT1 : Update GPDMA_CxTR1 from memory This bit controls the update of GPDMA_CxTR1 from the memory during the link transfer.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR1 update
0x1 : B_0x1
GPDMA_CxTR1 update
End of enumeration elements list.
GPDMA channel 8 linked-list base address register
address_offset : 0x450 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
LBA : linked-list base address of GPDMA channel x
bits : 16 - 31 (16 bit)
access : read-write
GPDMA channel 8 flag clear register
address_offset : 0x45C Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
TCF : transfer complete flag clear
bits : 8 - 8 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding TCF flag cleared
End of enumeration elements list.
HTF : half transfer flag clear
bits : 9 - 9 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding HTF flag cleared
End of enumeration elements list.
DTEF : data transfer error flag clear
bits : 10 - 10 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding DTEF flag cleared
End of enumeration elements list.
ULEF : update link transfer error flag clear
bits : 11 - 11 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding ULEF flag cleared
End of enumeration elements list.
USEF : user setting error flag clear
bits : 12 - 12 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding USEF flag cleared
End of enumeration elements list.
SUSPF : completed suspension flag clear
bits : 13 - 13 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding SUSPF flag cleared
End of enumeration elements list.
TOF : trigger overrun flag clear
bits : 14 - 14 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding TOF flag cleared
End of enumeration elements list.
GPDMA channel 8 status register
address_offset : 0x460 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
IDLEF : idle flag This idle flag is de-asserted by hardware when the channel is enabled (GPDMA_CxCR.EN = 1) with a valid channel configuration (no USEF to be immediately reported). This idle flag is asserted after hard reset or by hardware when the channel is back in idle state (in suspended or disabled state).
bits : 0 - 0 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
channel not in idle state
0x1 : B_0x1
channel in idle state
End of enumeration elements list.
TCF : transfer complete flag A transfer complete event is either a block transfer complete, a 2D/repeated block transfer complete, a LLI transfer complete including the upload of the next LLI if any, or the full linked-list completion, depending on the transfer complete event mode (GPDMA_CxTR2.TCEM[1:0]).
bits : 8 - 8 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no transfer complete event
0x1 : B_0x1
a transfer complete event occurred
End of enumeration elements list.
HTF : half transfer flag An half transfer event is either an half block transfer or an half 2D/repeated block transfer, depending on the transfer complete event mode (GPDMA_CxTR2.TCEM[1:0]). An half block transfer occurs when half of the bytes of the source block size (rounded up integer of GPDMA_CxBR1.BNDT[15:0]/2) has been transferred to the destination. An half 2D/repeated block transfer occurs when half of the repeated blocks (rounded up integer of (GPDMA_CxBR1.BRC[10:0]+1)/2)) has been transferred to the destination.
bits : 9 - 9 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no half transfer event
0x1 : B_0x1
an half transfer event occurred
End of enumeration elements list.
DTEF : data transfer error flag
bits : 10 - 10 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no data transfer error event
0x1 : B_0x1
a master bus error event occurred on a data transfer
End of enumeration elements list.
ULEF : update link transfer error flag
bits : 11 - 11 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no update link transfer error event
0x1 : B_0x1
a master bus error event occurred while updating a linked-list register from memory
End of enumeration elements list.
USEF : user setting error flag
bits : 12 - 12 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no user setting error event
0x1 : B_0x1
a user setting error event occurred
End of enumeration elements list.
SUSPF : completed suspension flag
bits : 13 - 13 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no completed suspension event
0x1 : B_0x1
a completed suspension event occurred
End of enumeration elements list.
TOF : trigger overrun flag
bits : 14 - 14 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no trigger overrun event
0x1 : B_0x1
a trigger overrun event occurred
End of enumeration elements list.
FIFOL : monitored FIFO level Number of available write beats in the FIFO, in units of the programmed destination data width (see GPDMA_CxTR1.DDW_LOG2[1:0], in units of bytes, half-words, or words). Note: After having suspended an active transfer, the user may need to read FIFOL[7:0], additionally to GPDMA_CxBR1.BDNT[15:0] and GPDMA_CxBR1.BRC[10:0], to know how many data have been transferred to the destination. Before reading, the user may wait for the transfer to be suspended (GPDMA_CxSR.SUSPF = 1).
bits : 16 - 23 (8 bit)
access : read-only
GPDMA channel 8 control register
address_offset : 0x464 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
EN : enable Writing 1 into the field RESET (bit 1) causes the hardware to de-assert this bit, whatever is written into this bit 0. Else: this bit is de-asserted by hardware when there is a transfer error (master bus error or user setting error) or when there is a channel transfer complete (channel ready to be configured, e.g. if LSM=1 at the end of a single execution of the LLI). Else, this bit can be asserted by software. Writing 0 into this EN bit is ignored.
bits : 0 - 0 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
write: ignored, read: channel disabled
0x1 : B_0x1
write: enable channel, read: channel enabled
End of enumeration elements list.
RESET : reset This bit is write only. Writing 0 has no impact. Writing 1 implies the reset of the following: the FIFO, the channel internal state, SUSP and EN bits (whatever is written receptively in bit 2 and bit 0). The reset is effective when the channel is in steady state, meaning one of the following: - active channel in suspended state (GPDMA_CxSR.SUSPF = 1 and GPDMA_CxSR.IDLEF = GPDMA_CxCR.EN = 1) - channel in disabled state (GPDMA_CxSR.IDLEF = 1 and GPDMA_CxCR.EN = 0). After writing a RESET, to continue using this channel, the user must explicitly reconfigure the channel including the hardware-modified configuration registers (GPDMA_CxBR1, GPDMA_CxSAR and GPDMA_CxDAR) before enabling again the channel (see the programming sequence in ).
bits : 1 - 1 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no channel reset
0x1 : B_0x1
channel reset
End of enumeration elements list.
SUSP : suspend Writing 1 into the field RESET (bit 1) causes the hardware to de-assert this bit, whatever is written into this bit 2. Else: Software must write 1 in order to suspend an active channel i.e. a channel with an on-going GPDMA transfer over its master ports. The software must write 0 in order to resume a suspended channel, following the programming sequence detailed in .
bits : 2 - 2 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
write: resume channel, read: channel not suspended
0x1 : B_0x1
write: suspend channel, read: channel suspended.
End of enumeration elements list.
TCIE : transfer complete interrupt enable
bits : 8 - 8 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
HTIE : half transfer complete interrupt enable
bits : 9 - 9 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
DTEIE : data transfer error interrupt enable
bits : 10 - 10 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
ULEIE : update link transfer error interrupt enable
bits : 11 - 11 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
USEIE : user setting error interrupt enable
bits : 12 - 12 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
SUSPIE : completed suspension interrupt enable
bits : 13 - 13 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
TOIE : trigger overrun interrupt enable
bits : 14 - 14 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
LSM : Link step mode First the (possible 1D/repeated) block transfer is executed as defined by the current internal register file until GPDMA_CxBR1.BNDT[15:0] = 0 and GPDMA_CxBR1.BRC[10:0] = 0 if present. Secondly the next linked-list data structure is conditionally uploaded from memory as defined by GPDMA_CxLLR. Then channel execution is completed. Note: This bit must be written when EN=0. This bit is read-only when EN=1.
bits : 16 - 16 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
channel executed for the full linked-list and completed at the end of the last LLI (GPDMA_CxLLR = 0). The 16 low-significant bits of the link address are null (LA[15:0] = 0) and all the update bits are null (UT1 =UB1 = UT2 = USA = UDA = ULL = 0 and UT3 = UB2 = 0 if present). Then GPDMA_CxBR1.BNDT[15:0] = 0 and GPDMA_CxBR1.BRC[10:0] = 0 if present.
0x1 : B_0x1
channel executed once for the current LLI
End of enumeration elements list.
LAP : linked-list allocated port This bit is used to allocate the master port for the update of the GPDMA linked-list registers from the memory. Note: This bit must be written when EN=0. This bit is read-only when EN=1.
bits : 17 - 17 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
PRIO : priority level of the channel x GPDMA transfer versus others Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 22 - 23 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
low priority, low weight
0x1 : B_0x1
low priority, mid weight
0x2 : B_0x2
low priority, high weight
0x3 : B_0x3
high priority
End of enumeration elements list.
GPDMA channel 8 transfer register 1
address_offset : 0x490 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SDW_LOG2 : binary logarithm of the source data width of a burst in bytes Note: Setting a 8-byte data width causes a user setting error to be reported and no transfer is issued. A source block size must be a multiple of the source data width (GPDMA_CxBR1.BNDT[2:0] versus SDW_LOG2[1:0]). Otherwise, a user setting error is reported and no transfer is issued. A source single transfer must have an aligned address with its data width (start address GPDMA_CxSAR[2:0] versus SDW_LOG2[1:0]). Otherwise, a user setting error is reported and none transfer is issued.
bits : 0 - 1 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
byte
0x1 : B_0x1
half-word (2 bytes)
0x2 : B_0x2
word (4 bytes)
0x3 : B_0x3
user setting error reported and no transfer issued
End of enumeration elements list.
SINC : source incrementing burst The source address, pointed by GPDMA_CxSAR, is kept constant after a burst beat/single transfer or is incremented by the offset value corresponding to a contiguous data after a burst beat/single transfer.
bits : 3 - 3 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
fixed burst
0x1 : B_0x1
contiguously incremented burst
End of enumeration elements list.
SBL_1 : source burst length minus 1, between 0 and 63 The burst length unit is one data named beat within a burst. If SBL_1[5:0] =0 , the burst can be named as single. Each data/beat has a width defined by the destination data width SDW_LOG2[1:0]. Note: If a burst transfer crossed a 1-Kbyte address boundary on a AHB transfer, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the AHB protocol. If a burst transfer is of length greater than the FIFO size of the channel x, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the FIFO size. Transfer performance is lower, with GPDMA re-arbitration between effective and lower bursts/singles, but the data integrity is guaranteed.
bits : 4 - 9 (6 bit)
access : read-write
PAM : padding/alignment mode If DDW_LOG2[1:0] = SDW_LOG2[1:0]: if the data width of a burst destination transfer is equal to the data width of a burst source transfer, these bits are ignored. Else: - Case 1: If destination data width > source data width 1x: successive source data are FIFO queued and packed at the destination data width, in a left (LSB) to right (MSB) order (named little endian), before a destination transfer - Case 2: If destination data width < source data width 1x: source data is FIFO queued and unpacked at the destination data width, to be transferred in a left (LSB) to right (MSB) order (named little endian) to the destination Note:
bits : 11 - 12 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
source data is transferred as right aligned, left-truncated down to the destination data width
0x1 : B_0x1
source data is transferred as left-aligned, right-truncated down to the destination data width
0x0 : B_0x0
source data is transferred as right aligned, left-truncated down to the destination data width
0x1 : B_0x1
source data is transferred as left-aligned, right-truncated down to the destination data width
End of enumeration elements list.
SBX : source byte exchange within the unaligned half-word of each source word If the source data width is shorter than a word, this bit is ignored. If the source data width is a word:
bits : 13 - 13 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no byte-based exchange within the unaligned half-word of each source word
0x1 : B_0x1
the two consecutive bytes within the unaligned half-word of each source word are exchanged.
End of enumeration elements list.
SAP : source allocated port This bit is used to allocate the master port for the source transfer Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 14 - 14 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
SSEC : security attribute of the GPDMA transfer from the source If GPDMA_SECCFGR.SECx = 1 and the access is secure: This is a secure register bit. This bit can only be read by a secure software. This bit must be written by a secure software when GPDMA_SECCFGR.SECx =1 . A secure write is ignored when GPDMA_SECCFGR.SECx = 0. When GPDMA_SECCFGR.SECx is de-asserted, this SSEC bit is also de-asserted by hardware (on a secure reconfiguration of the channel as non-secure), and the GPDMA transfer from the source is non-secure.
bits : 15 - 15 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
GPDMA transfer non-secure
0x1 : B_0x1
GPDMA transfer secure
End of enumeration elements list.
DDW_LOG2 : binary logarithm of the destination data width of a burst, in bytes Note: Setting a 8-byte data width causes a user setting error to be reported and none transfer is issued. A destination burst transfer must have an aligned address with its data width (start address GPDMA_CxDAR[2:0] and address offset GPDMA_CxTR3.DAO[2:0], versus DDW_LOG2[1:0]). Otherwise a user setting error is reported and no transfer is issued.
bits : 16 - 17 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
byte
0x1 : B_0x1
half-word (2 bytes)
0x2 : B_0x2
word (4 bytes)
0x3 : B_0x3
user setting error reported and no transfer issued
End of enumeration elements list.
DINC : destination incrementing burst The destination address, pointed by GPDMA_CxDAR, is kept constant after a burst beat/single transfer, or is incremented by the offset value corresponding to a contiguous data after a burst beat/single transfer.
bits : 19 - 19 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
fixed burst
0x1 : B_0x1
contiguously incremented burst
End of enumeration elements list.
DBL_1 : destination burst length minus 1, between 0 and 63 The burst length unit is one data named beat within a burst. If DBL_1[5:0] =0 , the burst can be named as single. Each data/beat has a width defined by the destination data width DDW_LOG2[1:0]. Note: If a burst transfer crossed a 1-Kbyte address boundary on a AHB transfer, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the AHB protocol. If a burst transfer is of length greater than the FIFO size of the channel x, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the FIFO size. Transfer performance is lower, with GPDMA re-arbitration between effective and lower bursts/singles, but the data integrity is guaranteed.
bits : 20 - 25 (6 bit)
access : read-write
DBX : destination byte exchange If the destination data size is a byte, this bit is ignored. If the destination data size is not a byte:
bits : 26 - 26 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no byte-based exchange within half-word
0x1 : B_0x1
the two consecutive (post PAM) bytes are exchanged in each destination half-word.
End of enumeration elements list.
DHX : destination half-word exchange If the destination data size is shorter than a word, this bit is ignored. If the destination data size is a word:
bits : 27 - 27 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no halfword-based exchanged within word
0x1 : B_0x1
the two consecutive (post PAM) half-words are exchanged in each destination word.
End of enumeration elements list.
DAP : destination allocated port This bit is used to allocate the master port for the destination transfer Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
DSEC : security attribute of the GPDMA transfer to the destination If GPDMA_SECCFGR.SECx = 1 and the access is secure: This is a secure register bit. This bit can only be read by a secure software. This bit must be written by a secure software when GPDMA_SECCFGR.SECx = 1. A secure write is ignored when GPDMA_SECCFGR.SECx = 0. When GPDMA_SECCFGR.SECx is de-asserted, this DSEC bit is also de-asserted by hardware (on a secure reconfiguration of the channel as non-secure), and the GPDMA transfer to the destination is non-secure.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
GPDMA transfer non-secure
0x1 : B_0x1
GPDMA transfer secure
End of enumeration elements list.
GPDMA channel 8 transfer register 2
address_offset : 0x494 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
REQSEL : GPDMA hardware request selection These bits are ignored if channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer). Else, the selected hardware request is internally taken into account as per . The user must not assign a same input hardware request (same REQSEL[6:0] value) to different active GPDMA channels (GPDMA_CxCR.EN = 1 and GPDMA_CxTR2.SWREQ = 0 for these channels). GPDMA is not intended to hardware support the case of simultaneous enabled channels incorrectly configured with a same hardware peripheral request signal, and there is no user setting error reporting.
bits : 0 - 6 (7 bit)
access : read-write
SWREQ : software request This bit is internally taken into account when GPDMA_CxCR.EN is asserted.
bits : 9 - 9 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no software request. The selected hardware request REQSEL[6:0] is taken into account.
0x1 : B_0x1
software request for a memory-to-memory transfer. The default selected hardware request as per REQSEL[6:0] is ignored.
End of enumeration elements list.
DREQ : destination hardware request This bit is ignored if channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer). Else: Note:
bits : 10 - 10 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
selected hardware request driven by a source peripheral (request signal taken into account by the GPDMA transfer scheduler over the source/read port)
0x1 : B_0x1
selected hardware request driven by a destination peripheral (request signal taken into account by the GPDMA transfer scheduler over the destination/write port)
End of enumeration elements list.
BREQ : Block hardware request If the channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer), this bit is ignored. Else:
bits : 11 - 11 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
the selected hardware request is driven by a peripheral with a hardware request/acknowledge protocol at a burst level.
0x1 : B_0x1
the selected hardware request is driven by a peripheral with a hardware request/acknowledge protocol at a block level (see ).
End of enumeration elements list.
TRIGM : trigger mode These bits define the transfer granularity for its conditioning by the trigger. If the channel x is enabled (GPDMA_CxCR.EN asserted) with TRIGPOL[1:0] = 00 or 11, these TRIGM[1:0] bits are ignored. Else, a GPDMA transfer is conditioned by at least one trigger hit: first burst read of a 2D/repeated block transfer is conditioned by one hit trigger. – If the peripheral is programmed as a source (DREQ = 0) of the LLI data transfer, each programmed burst read is conditioned. – If the peripheral is programmed as a destination (DREQ = 1) of the LLI data transfer, each programmed burst write is conditioned. The first memory burst read of a (possibly 2D/repeated) block, also named as the first ready FIFO-based source burst, is gated by the occurrence of both the hardware request and the first trigger hit. The GPDMA monitoring of a trigger for channel x is started when the channel is enabled/loaded with a new active trigger configuration: rising or falling edge on a selected trigger (TRIGPOL[1:0] = 01 or respectively TRIGPOL[1:0] = 10). The monitoring of this trigger is kept active during the triggered and uncompleted (data or link) transfer and if a new trigger is detected then, this hit is internally memorized to grant the next transfer, as long as the defined rising or falling edge is not modified, and the TRIGSEL[5:0] is not modified, and the channel is enabled. Transferring a next LLIn+1 that updates the GPDMA_CxTR2 with a new value for any of TRIGSEL[5:0] or TRIGPOL[1:0], resets the monitoring, trashing the memorized hit of the formerly defined LLIn trigger. After a first new trigger hitn+1 is memorized, if another second trigger hitn+2 is detected and if the hitn triggered transfer is still not completed, hitn+2 is lost and not memorized.memorized. A trigger overrun flag is reported (GPDMA_CxSR.TOF =1 ), and an interrupt is generated if enabled (GPDMA_CxCR.TOIE = 1). The channel is not automatically disabled by hardware due to a trigger overrun. Note: When the source block size is not a multiple of the source burst size and is a multiple of the source data width, then the last programmed source burst is not completed and is internally shorten to match the block size. In this case, if TRIGM[1:0] = 11 and (SWREQ =1 or (SWREQ = 0 and DREQ =0 )), the shortened burst transfer (by singles or/and by bursts of lower length) is conditioned once by the trigger. When the programmed destination burst is internally shortened by singles or/and by bursts of lower length (versus FIFO size, versus block size, 1-Kbyte boundary address crossing): if the trigger is conditioning the programmed destination burst (if TRIGM[1:0] = 11 and SWREQ = 0 and DREQ = 1), this shortened destination burst transfer is conditioned once by the trigger.
bits : 14 - 15 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at block level: the first burst read of each block transfer is conditioned by one hit trigger (channel x = 12 to 15, for each block if a 2D/repeated block is configured with GPDMA_CxBR1.BRC[10:0] ≠ 0).
0x1 : B_0x1
channel x = 0 to 11, same as 00 channel x=12 to 15, at 2D/repeated block level, the
0x2 : B_0x2
at link level: a LLI link transfer is conditioned by one hit trigger. The LLI data transfer (if any) is not conditioned.
0x3 : B_0x3
at programmed burst level: If SWREQ = 1, each programmed burst read is conditioned by one hit trigger. If SWREQ = 0, each programmed burst that is requested by the selected peripheral, is conditioned by one hit trigger.
End of enumeration elements list.
TRIGSEL : trigger event input selection These bits select the trigger event input of the GPDMA transfer (as per ), with an active trigger event if TRIGPOL[1:0] ≠ 00.
bits : 16 - 21 (6 bit)
access : read-write
TRIGPOL : trigger event polarity These bits define the polarity of the selected trigger event input defined by TRIGSEL[5:0].
bits : 24 - 25 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no trigger (masked trigger event)
0x1 : B_0x1
trigger on the rising edge
0x2 : B_0x2
trigger on the falling edge
0x3 : B_0x3
same as 00
End of enumeration elements list.
TCEM : transfer complete event mode These bits define the transfer granularity for the transfer complete and half transfer complete events generation. Note: If the initial LLI0 data transfer is null/void (directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] = 0), then neither the complete transfer event nor the half transfer event is generated. Note: If the initial LLI0 data transfer is null/void (directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] = 0), then neither the complete transfer event nor the half transfer event is generated. Note: If the initial LLI0 data transfer is null/void (i.e. directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] =0 ), then the half transfer event is not generated, and the transfer complete event is generated when is completed the loading of the LLI1.
bits : 30 - 31 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at block level (when GPDMA_CxBR1.BNDT[15:0] = 0): the complete (and the half) transfer event is generated at the (respectively half of the) end of a block.
0x1 : B_0x1
channel x = 0 to 11, same as 00 channel x=12 to 15, at 2D/repeated block level (when GPDMA_CxBR1.BRC[10:0] = 0 and GPDMA_CxBR1.BNDT[15:0] = 0), the complete (and the half) transfer event is generated at the end (respectively half of the end) of the 2D/repeated block.
0x2 : B_0x2
at LLI level: the complete transfer event is generated at the end of the LLI transfer, including the update of the LLI if any. The half transfer event is generated at the half of the LLI data transfer (the LLI data transfer being a block transfer or a 2D/repeated block transfer for channel x = 12 to 15), if any data transfer.
0x3 : B_0x3
at channel level: the complete transfer event is generated at the end of the last LLI transfer. The half transfer event is generated at the half of the data transfer of the last LLI. The last LLI updates the link address GPDMA_CxLLR.LA[15:2] to zero and clears all the GPDMA_CxLLR update bits (UT1, UT2, UB1, USA, UDA and ULL, plus UT3 and UB2 if present). If the channel transfer is continuous/infinite, no event is generated.
End of enumeration elements list.
GPDMA channel 8 block register 1
address_offset : 0x498 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
BNDT : block number of data bytes to transfer from the source Block size transferred from the source. When the channel is enabled, this field becomes read-only and is decremented, indicating the remaining number of data items in the current source block to be transferred. BNDT[15:0] is programmed in number of bytes, maximum source block size is 64 Kbytes -1. Once the last data transfer is completed (BNDT[15:0] = 0): - if GPDMA_CxLLR.UB1 = 1, this field is updated by the LLI in the memory. - if GPDMA_CxLLR.UB1 = 0 and if there is at least one non null Uxx update bit, this field is internally restored to the programmed value. - if all GPDMA_CxLLR.Uxx = 0 and if GPDMA_CxLLR.LA[15:0] = 0, this field is internally restored to the programmed value (infinite/continuous last LLI). - if GPDMA_CxLLR = 0, this field is kept as zero following the last LLI data transfer. Note: A non-null source block size must be a multiple of the source data width (BNDT[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued. When configured in packing mode (GPDMA_CxTR1.PAM[1] = 1 and destination data width different from source data width), a non-null source block size must be a multiple of the destination data width (BNDT[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued.
bits : 0 - 15 (16 bit)
access : read-write
GPDMA channel 8 source address register
address_offset : 0x49C Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SA : source address This field is the pointer to the address from which the next data is read. During the channel activity, depending on the source addressing mode (GPDMA_CxTR1.SINC), this field is kept fixed or incremented by the data width (GPDMA_CxTR1.SDW_LOG2[1:0]) after each single source data, reflecting the next address from which data is read. During the channel activity, this address is updated after each completed source burst, consequently to: the programmed source burst either in fixed addressing mode or in contiguous-data incremented mode. If contiguously incremented (GPDMA_CxTR1.SINC = 1), then the additional address offset value is the programmed burst size, as defined by GPDMA_CxTR1.SBL_1[5:0] and GPDMA_CxTR1.SDW_LOG2[21:0] the additional source incremented/decremented offset value as programmed by GPDMA_CxBR1.SDEC and GPDMA_CxTR3.SAO[12:0] once/if completed source block transfer, for a channel x with 2D addressing capability (x = 12 to 15). additional block repeat source incremented/decremented offset value as programmed by GPDMA_CxBR1.BRSDEC and GPDMA_CxBR2.BRSAO[15:0] In linked-list mode, after a LLI data transfer is completed, this register is automatically updated by GPDMA from the memory, provided the LLI is set with GPDMA_CxLLR.USA = 1. Note: A source address must be aligned with the programmed data width of a source single (SA[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued. When the source block size is not a multiple of the source burst size and is a multiple of the source data width, the last programmed source burst is not completed and is internally shorten to match the block size. In this case, the additional GPDMA_CxTR3.SAO[12:0] is not applied.
bits : 0 - 31 (32 bit)
access : read-write
GPDMA channel 8 destination address register
address_offset : 0x4A0 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
DA : destination address This field is the pointer to the address from which the next data is written. During the channel activity, depending on the destination addressing mode (GPDMA_CxTR1.DINC), this field is kept fixed or incremented by the data width (GPDMA_CxTR1.DDW_LOG2[21:0]) after each single destination data, reflecting the next address from which data is written. During the channel activity, this address is updated after each completed destination burst, consequently to: the programmed destination burst either in fixed addressing mode or in contiguous-data incremented mode. If contiguously incremented (GPDMA_CxTR1.DINC = 1), then the additional address offset value is the programmed burst size, as defined by GPDMA_CxTR1.DBL_1[5:0] and GPDMA_CxTR1.DDW_LOG2[1:0] the additional destination incremented/decremented offset value as programmed by GPDMA_CxBR1.DDEC and GPDMA_CxTR3.DAO[12:0] once/if completed destination block transfer, for a channel x with 2D addressing capability (x = 12 to 15), the additional block repeat destination incremented/decremented offset value as programmed by GPDMA_CxBR1.BRDDEC and GPDMA_CxBR2.BRDAO[15:0] In linked-list mode, after a LLI data transfer is completed, this register is automatically updated by the GPDMA from the memory, provided the LLI is set with GPDMA_CxLLR.UDA = 1. Note: A destination address must be aligned with the programmed data width of a destination burst (DA[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued.
bits : 0 - 31 (32 bit)
access : read-write
GPDMA channel 8 linked-list address register
address_offset : 0x4CC Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
LA : pointer (16-bit low-significant address) to the next linked-list data structure If UT1 = UT2 = UB1 = USA = UDA = ULL = 0 and if LA[15:20] = 0, the current LLI is the last one. The channel transfer is completed without any update of the linked-list GPDMA register file. Else, this field is the pointer to the memory address offset from which the next linked-list data structure is automatically fetched from, once the data transfer is completed, in order to conditionally update the linked-list GPDMA internal register file (GPDMA_CxCTR1, GPDMA_CxTR2, GPDMA_CxBR1, GPDMA_CxSAR, GPDMA_CxDAR and GPDMA_CxLLR). Note: The user must program the pointer to be 32-bit aligned. The two low-significant bits are write ignored.
bits : 2 - 15 (14 bit)
access : read-write
ULL : Update GPDMA_CxLLR register from memory This bit is used to control the update of GPDMA_CxLLR from the memory during the link transfer.
bits : 16 - 16 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxLLR update
0x1 : B_0x1
GPDMA_CxLLR update
End of enumeration elements list.
UDA : Update GPDMA_CxDAR register from memory This bit is used to control the update of GPDMA_CxDAR from the memory during the link transfer.
bits : 27 - 27 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxDAR update
0x1 : B_0x1
GPDMA_CxDAR update
End of enumeration elements list.
USA : update GPDMA_CxSAR from memory This bit controls the update of GPDMA_CxSAR from the memory during the link transfer.
bits : 28 - 28 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxSAR update
0x1 : B_0x1
GPDMA_CxSAR update
End of enumeration elements list.
UB1 : Update GPDMA_CxBR1 from memory This bit controls the update of GPDMA_CxBR1 from the memory during the link transfer. If UB1 = 0 and if GPDMA_CxLLR ≠ 0, the linked-list is not completed. GPDMA_CxBR1.BNDT[15:0] is then restored to the programmed value after data transfer is completed and before the link transfer.
bits : 29 - 29 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxBR1 update from memory (GPDMA_CxBR1.BNDT[15:0] restored if any link transfer)
0x1 : B_0x1
GPDMA_CxBR1 update
End of enumeration elements list.
UT2 : Update GPDMA_CxTR2 from memory This bit controls the update of GPDMA_CxTR2 from the memory during the link transfer.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR2 update
0x1 : B_0x1
GPDMA_CxTR2 update
End of enumeration elements list.
UT1 : Update GPDMA_CxTR1 from memory This bit controls the update of GPDMA_CxTR1 from the memory during the link transfer.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR1 update
0x1 : B_0x1
GPDMA_CxTR1 update
End of enumeration elements list.
GPDMA channel 9 linked-list base address register
address_offset : 0x4D0 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
LBA : linked-list base address of GPDMA channel x
bits : 16 - 31 (16 bit)
access : read-write
GPDMA channel 9 flag clear register
address_offset : 0x4DC Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
TCF : transfer complete flag clear
bits : 8 - 8 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding TCF flag cleared
End of enumeration elements list.
HTF : half transfer flag clear
bits : 9 - 9 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding HTF flag cleared
End of enumeration elements list.
DTEF : data transfer error flag clear
bits : 10 - 10 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding DTEF flag cleared
End of enumeration elements list.
ULEF : update link transfer error flag clear
bits : 11 - 11 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding ULEF flag cleared
End of enumeration elements list.
USEF : user setting error flag clear
bits : 12 - 12 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding USEF flag cleared
End of enumeration elements list.
SUSPF : completed suspension flag clear
bits : 13 - 13 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding SUSPF flag cleared
End of enumeration elements list.
TOF : trigger overrun flag clear
bits : 14 - 14 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding TOF flag cleared
End of enumeration elements list.
GPDMA channel 9 status register
address_offset : 0x4E0 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
IDLEF : idle flag This idle flag is de-asserted by hardware when the channel is enabled (GPDMA_CxCR.EN = 1) with a valid channel configuration (no USEF to be immediately reported). This idle flag is asserted after hard reset or by hardware when the channel is back in idle state (in suspended or disabled state).
bits : 0 - 0 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
channel not in idle state
0x1 : B_0x1
channel in idle state
End of enumeration elements list.
TCF : transfer complete flag A transfer complete event is either a block transfer complete, a 2D/repeated block transfer complete, a LLI transfer complete including the upload of the next LLI if any, or the full linked-list completion, depending on the transfer complete event mode (GPDMA_CxTR2.TCEM[1:0]).
bits : 8 - 8 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no transfer complete event
0x1 : B_0x1
a transfer complete event occurred
End of enumeration elements list.
HTF : half transfer flag An half transfer event is either an half block transfer or an half 2D/repeated block transfer, depending on the transfer complete event mode (GPDMA_CxTR2.TCEM[1:0]). An half block transfer occurs when half of the bytes of the source block size (rounded up integer of GPDMA_CxBR1.BNDT[15:0]/2) has been transferred to the destination. An half 2D/repeated block transfer occurs when half of the repeated blocks (rounded up integer of (GPDMA_CxBR1.BRC[10:0]+1)/2)) has been transferred to the destination.
bits : 9 - 9 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no half transfer event
0x1 : B_0x1
an half transfer event occurred
End of enumeration elements list.
DTEF : data transfer error flag
bits : 10 - 10 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no data transfer error event
0x1 : B_0x1
a master bus error event occurred on a data transfer
End of enumeration elements list.
ULEF : update link transfer error flag
bits : 11 - 11 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no update link transfer error event
0x1 : B_0x1
a master bus error event occurred while updating a linked-list register from memory
End of enumeration elements list.
USEF : user setting error flag
bits : 12 - 12 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no user setting error event
0x1 : B_0x1
a user setting error event occurred
End of enumeration elements list.
SUSPF : completed suspension flag
bits : 13 - 13 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no completed suspension event
0x1 : B_0x1
a completed suspension event occurred
End of enumeration elements list.
TOF : trigger overrun flag
bits : 14 - 14 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no trigger overrun event
0x1 : B_0x1
a trigger overrun event occurred
End of enumeration elements list.
FIFOL : monitored FIFO level Number of available write beats in the FIFO, in units of the programmed destination data width (see GPDMA_CxTR1.DDW_LOG2[1:0], in units of bytes, half-words, or words). Note: After having suspended an active transfer, the user may need to read FIFOL[7:0], additionally to GPDMA_CxBR1.BDNT[15:0] and GPDMA_CxBR1.BRC[10:0], to know how many data have been transferred to the destination. Before reading, the user may wait for the transfer to be suspended (GPDMA_CxSR.SUSPF = 1).
bits : 16 - 23 (8 bit)
access : read-only
GPDMA channel 9 control register
address_offset : 0x4E4 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
EN : enable Writing 1 into the field RESET (bit 1) causes the hardware to de-assert this bit, whatever is written into this bit 0. Else: this bit is de-asserted by hardware when there is a transfer error (master bus error or user setting error) or when there is a channel transfer complete (channel ready to be configured, e.g. if LSM=1 at the end of a single execution of the LLI). Else, this bit can be asserted by software. Writing 0 into this EN bit is ignored.
bits : 0 - 0 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
write: ignored, read: channel disabled
0x1 : B_0x1
write: enable channel, read: channel enabled
End of enumeration elements list.
RESET : reset This bit is write only. Writing 0 has no impact. Writing 1 implies the reset of the following: the FIFO, the channel internal state, SUSP and EN bits (whatever is written receptively in bit 2 and bit 0). The reset is effective when the channel is in steady state, meaning one of the following: - active channel in suspended state (GPDMA_CxSR.SUSPF = 1 and GPDMA_CxSR.IDLEF = GPDMA_CxCR.EN = 1) - channel in disabled state (GPDMA_CxSR.IDLEF = 1 and GPDMA_CxCR.EN = 0). After writing a RESET, to continue using this channel, the user must explicitly reconfigure the channel including the hardware-modified configuration registers (GPDMA_CxBR1, GPDMA_CxSAR and GPDMA_CxDAR) before enabling again the channel (see the programming sequence in ).
bits : 1 - 1 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no channel reset
0x1 : B_0x1
channel reset
End of enumeration elements list.
SUSP : suspend Writing 1 into the field RESET (bit 1) causes the hardware to de-assert this bit, whatever is written into this bit 2. Else: Software must write 1 in order to suspend an active channel i.e. a channel with an on-going GPDMA transfer over its master ports. The software must write 0 in order to resume a suspended channel, following the programming sequence detailed in .
bits : 2 - 2 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
write: resume channel, read: channel not suspended
0x1 : B_0x1
write: suspend channel, read: channel suspended.
End of enumeration elements list.
TCIE : transfer complete interrupt enable
bits : 8 - 8 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
HTIE : half transfer complete interrupt enable
bits : 9 - 9 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
DTEIE : data transfer error interrupt enable
bits : 10 - 10 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
ULEIE : update link transfer error interrupt enable
bits : 11 - 11 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
USEIE : user setting error interrupt enable
bits : 12 - 12 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
SUSPIE : completed suspension interrupt enable
bits : 13 - 13 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
TOIE : trigger overrun interrupt enable
bits : 14 - 14 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
LSM : Link step mode First the (possible 1D/repeated) block transfer is executed as defined by the current internal register file until GPDMA_CxBR1.BNDT[15:0] = 0 and GPDMA_CxBR1.BRC[10:0] = 0 if present. Secondly the next linked-list data structure is conditionally uploaded from memory as defined by GPDMA_CxLLR. Then channel execution is completed. Note: This bit must be written when EN=0. This bit is read-only when EN=1.
bits : 16 - 16 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
channel executed for the full linked-list and completed at the end of the last LLI (GPDMA_CxLLR = 0). The 16 low-significant bits of the link address are null (LA[15:0] = 0) and all the update bits are null (UT1 =UB1 = UT2 = USA = UDA = ULL = 0 and UT3 = UB2 = 0 if present). Then GPDMA_CxBR1.BNDT[15:0] = 0 and GPDMA_CxBR1.BRC[10:0] = 0 if present.
0x1 : B_0x1
channel executed once for the current LLI
End of enumeration elements list.
LAP : linked-list allocated port This bit is used to allocate the master port for the update of the GPDMA linked-list registers from the memory. Note: This bit must be written when EN=0. This bit is read-only when EN=1.
bits : 17 - 17 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
PRIO : priority level of the channel x GPDMA transfer versus others Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 22 - 23 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
low priority, low weight
0x1 : B_0x1
low priority, mid weight
0x2 : B_0x2
low priority, high weight
0x3 : B_0x3
high priority
End of enumeration elements list.
GPDMA channel 0 linked-list base address register
address_offset : 0x50 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
LBA : linked-list base address of GPDMA channel x
bits : 16 - 31 (16 bit)
access : read-write
GPDMA channel 9 transfer register 1
address_offset : 0x510 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SDW_LOG2 : binary logarithm of the source data width of a burst in bytes Note: Setting a 8-byte data width causes a user setting error to be reported and no transfer is issued. A source block size must be a multiple of the source data width (GPDMA_CxBR1.BNDT[2:0] versus SDW_LOG2[1:0]). Otherwise, a user setting error is reported and no transfer is issued. A source single transfer must have an aligned address with its data width (start address GPDMA_CxSAR[2:0] versus SDW_LOG2[1:0]). Otherwise, a user setting error is reported and none transfer is issued.
bits : 0 - 1 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
byte
0x1 : B_0x1
half-word (2 bytes)
0x2 : B_0x2
word (4 bytes)
0x3 : B_0x3
user setting error reported and no transfer issued
End of enumeration elements list.
SINC : source incrementing burst The source address, pointed by GPDMA_CxSAR, is kept constant after a burst beat/single transfer or is incremented by the offset value corresponding to a contiguous data after a burst beat/single transfer.
bits : 3 - 3 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
fixed burst
0x1 : B_0x1
contiguously incremented burst
End of enumeration elements list.
SBL_1 : source burst length minus 1, between 0 and 63 The burst length unit is one data named beat within a burst. If SBL_1[5:0] =0 , the burst can be named as single. Each data/beat has a width defined by the destination data width SDW_LOG2[1:0]. Note: If a burst transfer crossed a 1-Kbyte address boundary on a AHB transfer, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the AHB protocol. If a burst transfer is of length greater than the FIFO size of the channel x, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the FIFO size. Transfer performance is lower, with GPDMA re-arbitration between effective and lower bursts/singles, but the data integrity is guaranteed.
bits : 4 - 9 (6 bit)
access : read-write
PAM : padding/alignment mode If DDW_LOG2[1:0] = SDW_LOG2[1:0]: if the data width of a burst destination transfer is equal to the data width of a burst source transfer, these bits are ignored. Else: - Case 1: If destination data width > source data width 1x: successive source data are FIFO queued and packed at the destination data width, in a left (LSB) to right (MSB) order (named little endian), before a destination transfer - Case 2: If destination data width < source data width 1x: source data is FIFO queued and unpacked at the destination data width, to be transferred in a left (LSB) to right (MSB) order (named little endian) to the destination Note:
bits : 11 - 12 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
source data is transferred as right aligned, left-truncated down to the destination data width
0x1 : B_0x1
source data is transferred as left-aligned, right-truncated down to the destination data width
0x0 : B_0x0
source data is transferred as right aligned, left-truncated down to the destination data width
0x1 : B_0x1
source data is transferred as left-aligned, right-truncated down to the destination data width
End of enumeration elements list.
SBX : source byte exchange within the unaligned half-word of each source word If the source data width is shorter than a word, this bit is ignored. If the source data width is a word:
bits : 13 - 13 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no byte-based exchange within the unaligned half-word of each source word
0x1 : B_0x1
the two consecutive bytes within the unaligned half-word of each source word are exchanged.
End of enumeration elements list.
SAP : source allocated port This bit is used to allocate the master port for the source transfer Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 14 - 14 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
SSEC : security attribute of the GPDMA transfer from the source If GPDMA_SECCFGR.SECx = 1 and the access is secure: This is a secure register bit. This bit can only be read by a secure software. This bit must be written by a secure software when GPDMA_SECCFGR.SECx =1 . A secure write is ignored when GPDMA_SECCFGR.SECx = 0. When GPDMA_SECCFGR.SECx is de-asserted, this SSEC bit is also de-asserted by hardware (on a secure reconfiguration of the channel as non-secure), and the GPDMA transfer from the source is non-secure.
bits : 15 - 15 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
GPDMA transfer non-secure
0x1 : B_0x1
GPDMA transfer secure
End of enumeration elements list.
DDW_LOG2 : binary logarithm of the destination data width of a burst, in bytes Note: Setting a 8-byte data width causes a user setting error to be reported and none transfer is issued. A destination burst transfer must have an aligned address with its data width (start address GPDMA_CxDAR[2:0] and address offset GPDMA_CxTR3.DAO[2:0], versus DDW_LOG2[1:0]). Otherwise a user setting error is reported and no transfer is issued.
bits : 16 - 17 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
byte
0x1 : B_0x1
half-word (2 bytes)
0x2 : B_0x2
word (4 bytes)
0x3 : B_0x3
user setting error reported and no transfer issued
End of enumeration elements list.
DINC : destination incrementing burst The destination address, pointed by GPDMA_CxDAR, is kept constant after a burst beat/single transfer, or is incremented by the offset value corresponding to a contiguous data after a burst beat/single transfer.
bits : 19 - 19 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
fixed burst
0x1 : B_0x1
contiguously incremented burst
End of enumeration elements list.
DBL_1 : destination burst length minus 1, between 0 and 63 The burst length unit is one data named beat within a burst. If DBL_1[5:0] =0 , the burst can be named as single. Each data/beat has a width defined by the destination data width DDW_LOG2[1:0]. Note: If a burst transfer crossed a 1-Kbyte address boundary on a AHB transfer, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the AHB protocol. If a burst transfer is of length greater than the FIFO size of the channel x, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the FIFO size. Transfer performance is lower, with GPDMA re-arbitration between effective and lower bursts/singles, but the data integrity is guaranteed.
bits : 20 - 25 (6 bit)
access : read-write
DBX : destination byte exchange If the destination data size is a byte, this bit is ignored. If the destination data size is not a byte:
bits : 26 - 26 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no byte-based exchange within half-word
0x1 : B_0x1
the two consecutive (post PAM) bytes are exchanged in each destination half-word.
End of enumeration elements list.
DHX : destination half-word exchange If the destination data size is shorter than a word, this bit is ignored. If the destination data size is a word:
bits : 27 - 27 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no halfword-based exchanged within word
0x1 : B_0x1
the two consecutive (post PAM) half-words are exchanged in each destination word.
End of enumeration elements list.
DAP : destination allocated port This bit is used to allocate the master port for the destination transfer Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
DSEC : security attribute of the GPDMA transfer to the destination If GPDMA_SECCFGR.SECx = 1 and the access is secure: This is a secure register bit. This bit can only be read by a secure software. This bit must be written by a secure software when GPDMA_SECCFGR.SECx = 1. A secure write is ignored when GPDMA_SECCFGR.SECx = 0. When GPDMA_SECCFGR.SECx is de-asserted, this DSEC bit is also de-asserted by hardware (on a secure reconfiguration of the channel as non-secure), and the GPDMA transfer to the destination is non-secure.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
GPDMA transfer non-secure
0x1 : B_0x1
GPDMA transfer secure
End of enumeration elements list.
GPDMA channel 9 transfer register 2
address_offset : 0x514 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
REQSEL : GPDMA hardware request selection These bits are ignored if channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer). Else, the selected hardware request is internally taken into account as per . The user must not assign a same input hardware request (same REQSEL[6:0] value) to different active GPDMA channels (GPDMA_CxCR.EN = 1 and GPDMA_CxTR2.SWREQ = 0 for these channels). GPDMA is not intended to hardware support the case of simultaneous enabled channels incorrectly configured with a same hardware peripheral request signal, and there is no user setting error reporting.
bits : 0 - 6 (7 bit)
access : read-write
SWREQ : software request This bit is internally taken into account when GPDMA_CxCR.EN is asserted.
bits : 9 - 9 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no software request. The selected hardware request REQSEL[6:0] is taken into account.
0x1 : B_0x1
software request for a memory-to-memory transfer. The default selected hardware request as per REQSEL[6:0] is ignored.
End of enumeration elements list.
DREQ : destination hardware request This bit is ignored if channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer). Else: Note:
bits : 10 - 10 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
selected hardware request driven by a source peripheral (request signal taken into account by the GPDMA transfer scheduler over the source/read port)
0x1 : B_0x1
selected hardware request driven by a destination peripheral (request signal taken into account by the GPDMA transfer scheduler over the destination/write port)
End of enumeration elements list.
BREQ : Block hardware request If the channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer), this bit is ignored. Else:
bits : 11 - 11 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
the selected hardware request is driven by a peripheral with a hardware request/acknowledge protocol at a burst level.
0x1 : B_0x1
the selected hardware request is driven by a peripheral with a hardware request/acknowledge protocol at a block level (see ).
End of enumeration elements list.
TRIGM : trigger mode These bits define the transfer granularity for its conditioning by the trigger. If the channel x is enabled (GPDMA_CxCR.EN asserted) with TRIGPOL[1:0] = 00 or 11, these TRIGM[1:0] bits are ignored. Else, a GPDMA transfer is conditioned by at least one trigger hit: first burst read of a 2D/repeated block transfer is conditioned by one hit trigger. – If the peripheral is programmed as a source (DREQ = 0) of the LLI data transfer, each programmed burst read is conditioned. – If the peripheral is programmed as a destination (DREQ = 1) of the LLI data transfer, each programmed burst write is conditioned. The first memory burst read of a (possibly 2D/repeated) block, also named as the first ready FIFO-based source burst, is gated by the occurrence of both the hardware request and the first trigger hit. The GPDMA monitoring of a trigger for channel x is started when the channel is enabled/loaded with a new active trigger configuration: rising or falling edge on a selected trigger (TRIGPOL[1:0] = 01 or respectively TRIGPOL[1:0] = 10). The monitoring of this trigger is kept active during the triggered and uncompleted (data or link) transfer and if a new trigger is detected then, this hit is internally memorized to grant the next transfer, as long as the defined rising or falling edge is not modified, and the TRIGSEL[5:0] is not modified, and the channel is enabled. Transferring a next LLIn+1 that updates the GPDMA_CxTR2 with a new value for any of TRIGSEL[5:0] or TRIGPOL[1:0], resets the monitoring, trashing the memorized hit of the formerly defined LLIn trigger. After a first new trigger hitn+1 is memorized, if another second trigger hitn+2 is detected and if the hitn triggered transfer is still not completed, hitn+2 is lost and not memorized.memorized. A trigger overrun flag is reported (GPDMA_CxSR.TOF =1 ), and an interrupt is generated if enabled (GPDMA_CxCR.TOIE = 1). The channel is not automatically disabled by hardware due to a trigger overrun. Note: When the source block size is not a multiple of the source burst size and is a multiple of the source data width, then the last programmed source burst is not completed and is internally shorten to match the block size. In this case, if TRIGM[1:0] = 11 and (SWREQ =1 or (SWREQ = 0 and DREQ =0 )), the shortened burst transfer (by singles or/and by bursts of lower length) is conditioned once by the trigger. When the programmed destination burst is internally shortened by singles or/and by bursts of lower length (versus FIFO size, versus block size, 1-Kbyte boundary address crossing): if the trigger is conditioning the programmed destination burst (if TRIGM[1:0] = 11 and SWREQ = 0 and DREQ = 1), this shortened destination burst transfer is conditioned once by the trigger.
bits : 14 - 15 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at block level: the first burst read of each block transfer is conditioned by one hit trigger (channel x = 12 to 15, for each block if a 2D/repeated block is configured with GPDMA_CxBR1.BRC[10:0] ≠ 0).
0x1 : B_0x1
channel x = 0 to 11, same as 00 channel x=12 to 15, at 2D/repeated block level, the
0x2 : B_0x2
at link level: a LLI link transfer is conditioned by one hit trigger. The LLI data transfer (if any) is not conditioned.
0x3 : B_0x3
at programmed burst level: If SWREQ = 1, each programmed burst read is conditioned by one hit trigger. If SWREQ = 0, each programmed burst that is requested by the selected peripheral, is conditioned by one hit trigger.
End of enumeration elements list.
TRIGSEL : trigger event input selection These bits select the trigger event input of the GPDMA transfer (as per ), with an active trigger event if TRIGPOL[1:0] ≠ 00.
bits : 16 - 21 (6 bit)
access : read-write
TRIGPOL : trigger event polarity These bits define the polarity of the selected trigger event input defined by TRIGSEL[5:0].
bits : 24 - 25 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no trigger (masked trigger event)
0x1 : B_0x1
trigger on the rising edge
0x2 : B_0x2
trigger on the falling edge
0x3 : B_0x3
same as 00
End of enumeration elements list.
TCEM : transfer complete event mode These bits define the transfer granularity for the transfer complete and half transfer complete events generation. Note: If the initial LLI0 data transfer is null/void (directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] = 0), then neither the complete transfer event nor the half transfer event is generated. Note: If the initial LLI0 data transfer is null/void (directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] = 0), then neither the complete transfer event nor the half transfer event is generated. Note: If the initial LLI0 data transfer is null/void (i.e. directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] =0 ), then the half transfer event is not generated, and the transfer complete event is generated when is completed the loading of the LLI1.
bits : 30 - 31 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at block level (when GPDMA_CxBR1.BNDT[15:0] = 0): the complete (and the half) transfer event is generated at the (respectively half of the) end of a block.
0x1 : B_0x1
channel x = 0 to 11, same as 00 channel x=12 to 15, at 2D/repeated block level (when GPDMA_CxBR1.BRC[10:0] = 0 and GPDMA_CxBR1.BNDT[15:0] = 0), the complete (and the half) transfer event is generated at the end (respectively half of the end) of the 2D/repeated block.
0x2 : B_0x2
at LLI level: the complete transfer event is generated at the end of the LLI transfer, including the update of the LLI if any. The half transfer event is generated at the half of the LLI data transfer (the LLI data transfer being a block transfer or a 2D/repeated block transfer for channel x = 12 to 15), if any data transfer.
0x3 : B_0x3
at channel level: the complete transfer event is generated at the end of the last LLI transfer. The half transfer event is generated at the half of the data transfer of the last LLI. The last LLI updates the link address GPDMA_CxLLR.LA[15:2] to zero and clears all the GPDMA_CxLLR update bits (UT1, UT2, UB1, USA, UDA and ULL, plus UT3 and UB2 if present). If the channel transfer is continuous/infinite, no event is generated.
End of enumeration elements list.
GPDMA channel 9 block register 1
address_offset : 0x518 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
BNDT : block number of data bytes to transfer from the source Block size transferred from the source. When the channel is enabled, this field becomes read-only and is decremented, indicating the remaining number of data items in the current source block to be transferred. BNDT[15:0] is programmed in number of bytes, maximum source block size is 64 Kbytes -1. Once the last data transfer is completed (BNDT[15:0] = 0): - if GPDMA_CxLLR.UB1 = 1, this field is updated by the LLI in the memory. - if GPDMA_CxLLR.UB1 = 0 and if there is at least one non null Uxx update bit, this field is internally restored to the programmed value. - if all GPDMA_CxLLR.Uxx = 0 and if GPDMA_CxLLR.LA[15:0] = 0, this field is internally restored to the programmed value (infinite/continuous last LLI). - if GPDMA_CxLLR = 0, this field is kept as zero following the last LLI data transfer. Note: A non-null source block size must be a multiple of the source data width (BNDT[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued. When configured in packing mode (GPDMA_CxTR1.PAM[1] = 1 and destination data width different from source data width), a non-null source block size must be a multiple of the destination data width (BNDT[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued.
bits : 0 - 15 (16 bit)
access : read-write
GPDMA channel 9 source address register
address_offset : 0x51C Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SA : source address This field is the pointer to the address from which the next data is read. During the channel activity, depending on the source addressing mode (GPDMA_CxTR1.SINC), this field is kept fixed or incremented by the data width (GPDMA_CxTR1.SDW_LOG2[1:0]) after each single source data, reflecting the next address from which data is read. During the channel activity, this address is updated after each completed source burst, consequently to: the programmed source burst either in fixed addressing mode or in contiguous-data incremented mode. If contiguously incremented (GPDMA_CxTR1.SINC = 1), then the additional address offset value is the programmed burst size, as defined by GPDMA_CxTR1.SBL_1[5:0] and GPDMA_CxTR1.SDW_LOG2[21:0] the additional source incremented/decremented offset value as programmed by GPDMA_CxBR1.SDEC and GPDMA_CxTR3.SAO[12:0] once/if completed source block transfer, for a channel x with 2D addressing capability (x = 12 to 15). additional block repeat source incremented/decremented offset value as programmed by GPDMA_CxBR1.BRSDEC and GPDMA_CxBR2.BRSAO[15:0] In linked-list mode, after a LLI data transfer is completed, this register is automatically updated by GPDMA from the memory, provided the LLI is set with GPDMA_CxLLR.USA = 1. Note: A source address must be aligned with the programmed data width of a source single (SA[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued. When the source block size is not a multiple of the source burst size and is a multiple of the source data width, the last programmed source burst is not completed and is internally shorten to match the block size. In this case, the additional GPDMA_CxTR3.SAO[12:0] is not applied.
bits : 0 - 31 (32 bit)
access : read-write
GPDMA channel 9 destination address register
address_offset : 0x520 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
DA : destination address This field is the pointer to the address from which the next data is written. During the channel activity, depending on the destination addressing mode (GPDMA_CxTR1.DINC), this field is kept fixed or incremented by the data width (GPDMA_CxTR1.DDW_LOG2[21:0]) after each single destination data, reflecting the next address from which data is written. During the channel activity, this address is updated after each completed destination burst, consequently to: the programmed destination burst either in fixed addressing mode or in contiguous-data incremented mode. If contiguously incremented (GPDMA_CxTR1.DINC = 1), then the additional address offset value is the programmed burst size, as defined by GPDMA_CxTR1.DBL_1[5:0] and GPDMA_CxTR1.DDW_LOG2[1:0] the additional destination incremented/decremented offset value as programmed by GPDMA_CxBR1.DDEC and GPDMA_CxTR3.DAO[12:0] once/if completed destination block transfer, for a channel x with 2D addressing capability (x = 12 to 15), the additional block repeat destination incremented/decremented offset value as programmed by GPDMA_CxBR1.BRDDEC and GPDMA_CxBR2.BRDAO[15:0] In linked-list mode, after a LLI data transfer is completed, this register is automatically updated by the GPDMA from the memory, provided the LLI is set with GPDMA_CxLLR.UDA = 1. Note: A destination address must be aligned with the programmed data width of a destination burst (DA[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued.
bits : 0 - 31 (32 bit)
access : read-write
GPDMA channel 9 linked-list address register
address_offset : 0x54C Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
LA : pointer (16-bit low-significant address) to the next linked-list data structure If UT1 = UT2 = UB1 = USA = UDA = ULL = 0 and if LA[15:20] = 0, the current LLI is the last one. The channel transfer is completed without any update of the linked-list GPDMA register file. Else, this field is the pointer to the memory address offset from which the next linked-list data structure is automatically fetched from, once the data transfer is completed, in order to conditionally update the linked-list GPDMA internal register file (GPDMA_CxCTR1, GPDMA_CxTR2, GPDMA_CxBR1, GPDMA_CxSAR, GPDMA_CxDAR and GPDMA_CxLLR). Note: The user must program the pointer to be 32-bit aligned. The two low-significant bits are write ignored.
bits : 2 - 15 (14 bit)
access : read-write
ULL : Update GPDMA_CxLLR register from memory This bit is used to control the update of GPDMA_CxLLR from the memory during the link transfer.
bits : 16 - 16 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxLLR update
0x1 : B_0x1
GPDMA_CxLLR update
End of enumeration elements list.
UDA : Update GPDMA_CxDAR register from memory This bit is used to control the update of GPDMA_CxDAR from the memory during the link transfer.
bits : 27 - 27 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxDAR update
0x1 : B_0x1
GPDMA_CxDAR update
End of enumeration elements list.
USA : update GPDMA_CxSAR from memory This bit controls the update of GPDMA_CxSAR from the memory during the link transfer.
bits : 28 - 28 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxSAR update
0x1 : B_0x1
GPDMA_CxSAR update
End of enumeration elements list.
UB1 : Update GPDMA_CxBR1 from memory This bit controls the update of GPDMA_CxBR1 from the memory during the link transfer. If UB1 = 0 and if GPDMA_CxLLR ≠ 0, the linked-list is not completed. GPDMA_CxBR1.BNDT[15:0] is then restored to the programmed value after data transfer is completed and before the link transfer.
bits : 29 - 29 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxBR1 update from memory (GPDMA_CxBR1.BNDT[15:0] restored if any link transfer)
0x1 : B_0x1
GPDMA_CxBR1 update
End of enumeration elements list.
UT2 : Update GPDMA_CxTR2 from memory This bit controls the update of GPDMA_CxTR2 from the memory during the link transfer.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR2 update
0x1 : B_0x1
GPDMA_CxTR2 update
End of enumeration elements list.
UT1 : Update GPDMA_CxTR1 from memory This bit controls the update of GPDMA_CxTR1 from the memory during the link transfer.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR1 update
0x1 : B_0x1
GPDMA_CxTR1 update
End of enumeration elements list.
GPDMA channel 10 linked-list base address register
address_offset : 0x550 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
LBA : linked-list base address of GPDMA channel x
bits : 16 - 31 (16 bit)
access : read-write
GPDMA channel 10 flag clear register
address_offset : 0x55C Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
TCF : transfer complete flag clear
bits : 8 - 8 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding TCF flag cleared
End of enumeration elements list.
HTF : half transfer flag clear
bits : 9 - 9 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding HTF flag cleared
End of enumeration elements list.
DTEF : data transfer error flag clear
bits : 10 - 10 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding DTEF flag cleared
End of enumeration elements list.
ULEF : update link transfer error flag clear
bits : 11 - 11 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding ULEF flag cleared
End of enumeration elements list.
USEF : user setting error flag clear
bits : 12 - 12 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding USEF flag cleared
End of enumeration elements list.
SUSPF : completed suspension flag clear
bits : 13 - 13 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding SUSPF flag cleared
End of enumeration elements list.
TOF : trigger overrun flag clear
bits : 14 - 14 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding TOF flag cleared
End of enumeration elements list.
GPDMA channel 10 status register
address_offset : 0x560 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
IDLEF : idle flag This idle flag is de-asserted by hardware when the channel is enabled (GPDMA_CxCR.EN = 1) with a valid channel configuration (no USEF to be immediately reported). This idle flag is asserted after hard reset or by hardware when the channel is back in idle state (in suspended or disabled state).
bits : 0 - 0 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
channel not in idle state
0x1 : B_0x1
channel in idle state
End of enumeration elements list.
TCF : transfer complete flag A transfer complete event is either a block transfer complete, a 2D/repeated block transfer complete, a LLI transfer complete including the upload of the next LLI if any, or the full linked-list completion, depending on the transfer complete event mode (GPDMA_CxTR2.TCEM[1:0]).
bits : 8 - 8 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no transfer complete event
0x1 : B_0x1
a transfer complete event occurred
End of enumeration elements list.
HTF : half transfer flag An half transfer event is either an half block transfer or an half 2D/repeated block transfer, depending on the transfer complete event mode (GPDMA_CxTR2.TCEM[1:0]). An half block transfer occurs when half of the bytes of the source block size (rounded up integer of GPDMA_CxBR1.BNDT[15:0]/2) has been transferred to the destination. An half 2D/repeated block transfer occurs when half of the repeated blocks (rounded up integer of (GPDMA_CxBR1.BRC[10:0]+1)/2)) has been transferred to the destination.
bits : 9 - 9 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no half transfer event
0x1 : B_0x1
an half transfer event occurred
End of enumeration elements list.
DTEF : data transfer error flag
bits : 10 - 10 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no data transfer error event
0x1 : B_0x1
a master bus error event occurred on a data transfer
End of enumeration elements list.
ULEF : update link transfer error flag
bits : 11 - 11 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no update link transfer error event
0x1 : B_0x1
a master bus error event occurred while updating a linked-list register from memory
End of enumeration elements list.
USEF : user setting error flag
bits : 12 - 12 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no user setting error event
0x1 : B_0x1
a user setting error event occurred
End of enumeration elements list.
SUSPF : completed suspension flag
bits : 13 - 13 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no completed suspension event
0x1 : B_0x1
a completed suspension event occurred
End of enumeration elements list.
TOF : trigger overrun flag
bits : 14 - 14 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no trigger overrun event
0x1 : B_0x1
a trigger overrun event occurred
End of enumeration elements list.
FIFOL : monitored FIFO level Number of available write beats in the FIFO, in units of the programmed destination data width (see GPDMA_CxTR1.DDW_LOG2[1:0], in units of bytes, half-words, or words). Note: After having suspended an active transfer, the user may need to read FIFOL[7:0], additionally to GPDMA_CxBR1.BDNT[15:0] and GPDMA_CxBR1.BRC[10:0], to know how many data have been transferred to the destination. Before reading, the user may wait for the transfer to be suspended (GPDMA_CxSR.SUSPF = 1).
bits : 16 - 23 (8 bit)
access : read-only
GPDMA channel 10 control register
address_offset : 0x564 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
EN : enable Writing 1 into the field RESET (bit 1) causes the hardware to de-assert this bit, whatever is written into this bit 0. Else: this bit is de-asserted by hardware when there is a transfer error (master bus error or user setting error) or when there is a channel transfer complete (channel ready to be configured, e.g. if LSM=1 at the end of a single execution of the LLI). Else, this bit can be asserted by software. Writing 0 into this EN bit is ignored.
bits : 0 - 0 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
write: ignored, read: channel disabled
0x1 : B_0x1
write: enable channel, read: channel enabled
End of enumeration elements list.
RESET : reset This bit is write only. Writing 0 has no impact. Writing 1 implies the reset of the following: the FIFO, the channel internal state, SUSP and EN bits (whatever is written receptively in bit 2 and bit 0). The reset is effective when the channel is in steady state, meaning one of the following: - active channel in suspended state (GPDMA_CxSR.SUSPF = 1 and GPDMA_CxSR.IDLEF = GPDMA_CxCR.EN = 1) - channel in disabled state (GPDMA_CxSR.IDLEF = 1 and GPDMA_CxCR.EN = 0). After writing a RESET, to continue using this channel, the user must explicitly reconfigure the channel including the hardware-modified configuration registers (GPDMA_CxBR1, GPDMA_CxSAR and GPDMA_CxDAR) before enabling again the channel (see the programming sequence in ).
bits : 1 - 1 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no channel reset
0x1 : B_0x1
channel reset
End of enumeration elements list.
SUSP : suspend Writing 1 into the field RESET (bit 1) causes the hardware to de-assert this bit, whatever is written into this bit 2. Else: Software must write 1 in order to suspend an active channel i.e. a channel with an on-going GPDMA transfer over its master ports. The software must write 0 in order to resume a suspended channel, following the programming sequence detailed in .
bits : 2 - 2 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
write: resume channel, read: channel not suspended
0x1 : B_0x1
write: suspend channel, read: channel suspended.
End of enumeration elements list.
TCIE : transfer complete interrupt enable
bits : 8 - 8 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
HTIE : half transfer complete interrupt enable
bits : 9 - 9 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
DTEIE : data transfer error interrupt enable
bits : 10 - 10 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
ULEIE : update link transfer error interrupt enable
bits : 11 - 11 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
USEIE : user setting error interrupt enable
bits : 12 - 12 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
SUSPIE : completed suspension interrupt enable
bits : 13 - 13 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
TOIE : trigger overrun interrupt enable
bits : 14 - 14 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
LSM : Link step mode First the (possible 1D/repeated) block transfer is executed as defined by the current internal register file until GPDMA_CxBR1.BNDT[15:0] = 0 and GPDMA_CxBR1.BRC[10:0] = 0 if present. Secondly the next linked-list data structure is conditionally uploaded from memory as defined by GPDMA_CxLLR. Then channel execution is completed. Note: This bit must be written when EN=0. This bit is read-only when EN=1.
bits : 16 - 16 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
channel executed for the full linked-list and completed at the end of the last LLI (GPDMA_CxLLR = 0). The 16 low-significant bits of the link address are null (LA[15:0] = 0) and all the update bits are null (UT1 =UB1 = UT2 = USA = UDA = ULL = 0 and UT3 = UB2 = 0 if present). Then GPDMA_CxBR1.BNDT[15:0] = 0 and GPDMA_CxBR1.BRC[10:0] = 0 if present.
0x1 : B_0x1
channel executed once for the current LLI
End of enumeration elements list.
LAP : linked-list allocated port This bit is used to allocate the master port for the update of the GPDMA linked-list registers from the memory. Note: This bit must be written when EN=0. This bit is read-only when EN=1.
bits : 17 - 17 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
PRIO : priority level of the channel x GPDMA transfer versus others Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 22 - 23 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
low priority, low weight
0x1 : B_0x1
low priority, mid weight
0x2 : B_0x2
low priority, high weight
0x3 : B_0x3
high priority
End of enumeration elements list.
GPDMA channel 10 transfer register 1
address_offset : 0x590 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SDW_LOG2 : binary logarithm of the source data width of a burst in bytes Note: Setting a 8-byte data width causes a user setting error to be reported and no transfer is issued. A source block size must be a multiple of the source data width (GPDMA_CxBR1.BNDT[2:0] versus SDW_LOG2[1:0]). Otherwise, a user setting error is reported and no transfer is issued. A source single transfer must have an aligned address with its data width (start address GPDMA_CxSAR[2:0] versus SDW_LOG2[1:0]). Otherwise, a user setting error is reported and none transfer is issued.
bits : 0 - 1 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
byte
0x1 : B_0x1
half-word (2 bytes)
0x2 : B_0x2
word (4 bytes)
0x3 : B_0x3
user setting error reported and no transfer issued
End of enumeration elements list.
SINC : source incrementing burst The source address, pointed by GPDMA_CxSAR, is kept constant after a burst beat/single transfer or is incremented by the offset value corresponding to a contiguous data after a burst beat/single transfer.
bits : 3 - 3 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
fixed burst
0x1 : B_0x1
contiguously incremented burst
End of enumeration elements list.
SBL_1 : source burst length minus 1, between 0 and 63 The burst length unit is one data named beat within a burst. If SBL_1[5:0] =0 , the burst can be named as single. Each data/beat has a width defined by the destination data width SDW_LOG2[1:0]. Note: If a burst transfer crossed a 1-Kbyte address boundary on a AHB transfer, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the AHB protocol. If a burst transfer is of length greater than the FIFO size of the channel x, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the FIFO size. Transfer performance is lower, with GPDMA re-arbitration between effective and lower bursts/singles, but the data integrity is guaranteed.
bits : 4 - 9 (6 bit)
access : read-write
PAM : padding/alignment mode If DDW_LOG2[1:0] = SDW_LOG2[1:0]: if the data width of a burst destination transfer is equal to the data width of a burst source transfer, these bits are ignored. Else: - Case 1: If destination data width > source data width 1x: successive source data are FIFO queued and packed at the destination data width, in a left (LSB) to right (MSB) order (named little endian), before a destination transfer - Case 2: If destination data width < source data width 1x: source data is FIFO queued and unpacked at the destination data width, to be transferred in a left (LSB) to right (MSB) order (named little endian) to the destination Note:
bits : 11 - 12 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
source data is transferred as right aligned, left-truncated down to the destination data width
0x1 : B_0x1
source data is transferred as left-aligned, right-truncated down to the destination data width
0x0 : B_0x0
source data is transferred as right aligned, left-truncated down to the destination data width
0x1 : B_0x1
source data is transferred as left-aligned, right-truncated down to the destination data width
End of enumeration elements list.
SBX : source byte exchange within the unaligned half-word of each source word If the source data width is shorter than a word, this bit is ignored. If the source data width is a word:
bits : 13 - 13 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no byte-based exchange within the unaligned half-word of each source word
0x1 : B_0x1
the two consecutive bytes within the unaligned half-word of each source word are exchanged.
End of enumeration elements list.
SAP : source allocated port This bit is used to allocate the master port for the source transfer Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 14 - 14 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
SSEC : security attribute of the GPDMA transfer from the source If GPDMA_SECCFGR.SECx = 1 and the access is secure: This is a secure register bit. This bit can only be read by a secure software. This bit must be written by a secure software when GPDMA_SECCFGR.SECx =1 . A secure write is ignored when GPDMA_SECCFGR.SECx = 0. When GPDMA_SECCFGR.SECx is de-asserted, this SSEC bit is also de-asserted by hardware (on a secure reconfiguration of the channel as non-secure), and the GPDMA transfer from the source is non-secure.
bits : 15 - 15 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
GPDMA transfer non-secure
0x1 : B_0x1
GPDMA transfer secure
End of enumeration elements list.
DDW_LOG2 : binary logarithm of the destination data width of a burst, in bytes Note: Setting a 8-byte data width causes a user setting error to be reported and none transfer is issued. A destination burst transfer must have an aligned address with its data width (start address GPDMA_CxDAR[2:0] and address offset GPDMA_CxTR3.DAO[2:0], versus DDW_LOG2[1:0]). Otherwise a user setting error is reported and no transfer is issued.
bits : 16 - 17 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
byte
0x1 : B_0x1
half-word (2 bytes)
0x2 : B_0x2
word (4 bytes)
0x3 : B_0x3
user setting error reported and no transfer issued
End of enumeration elements list.
DINC : destination incrementing burst The destination address, pointed by GPDMA_CxDAR, is kept constant after a burst beat/single transfer, or is incremented by the offset value corresponding to a contiguous data after a burst beat/single transfer.
bits : 19 - 19 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
fixed burst
0x1 : B_0x1
contiguously incremented burst
End of enumeration elements list.
DBL_1 : destination burst length minus 1, between 0 and 63 The burst length unit is one data named beat within a burst. If DBL_1[5:0] =0 , the burst can be named as single. Each data/beat has a width defined by the destination data width DDW_LOG2[1:0]. Note: If a burst transfer crossed a 1-Kbyte address boundary on a AHB transfer, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the AHB protocol. If a burst transfer is of length greater than the FIFO size of the channel x, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the FIFO size. Transfer performance is lower, with GPDMA re-arbitration between effective and lower bursts/singles, but the data integrity is guaranteed.
bits : 20 - 25 (6 bit)
access : read-write
DBX : destination byte exchange If the destination data size is a byte, this bit is ignored. If the destination data size is not a byte:
bits : 26 - 26 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no byte-based exchange within half-word
0x1 : B_0x1
the two consecutive (post PAM) bytes are exchanged in each destination half-word.
End of enumeration elements list.
DHX : destination half-word exchange If the destination data size is shorter than a word, this bit is ignored. If the destination data size is a word:
bits : 27 - 27 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no halfword-based exchanged within word
0x1 : B_0x1
the two consecutive (post PAM) half-words are exchanged in each destination word.
End of enumeration elements list.
DAP : destination allocated port This bit is used to allocate the master port for the destination transfer Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
DSEC : security attribute of the GPDMA transfer to the destination If GPDMA_SECCFGR.SECx = 1 and the access is secure: This is a secure register bit. This bit can only be read by a secure software. This bit must be written by a secure software when GPDMA_SECCFGR.SECx = 1. A secure write is ignored when GPDMA_SECCFGR.SECx = 0. When GPDMA_SECCFGR.SECx is de-asserted, this DSEC bit is also de-asserted by hardware (on a secure reconfiguration of the channel as non-secure), and the GPDMA transfer to the destination is non-secure.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
GPDMA transfer non-secure
0x1 : B_0x1
GPDMA transfer secure
End of enumeration elements list.
GPDMA channel 10 transfer register 2
address_offset : 0x594 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
REQSEL : GPDMA hardware request selection These bits are ignored if channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer). Else, the selected hardware request is internally taken into account as per . The user must not assign a same input hardware request (same REQSEL[6:0] value) to different active GPDMA channels (GPDMA_CxCR.EN = 1 and GPDMA_CxTR2.SWREQ = 0 for these channels). GPDMA is not intended to hardware support the case of simultaneous enabled channels incorrectly configured with a same hardware peripheral request signal, and there is no user setting error reporting.
bits : 0 - 6 (7 bit)
access : read-write
SWREQ : software request This bit is internally taken into account when GPDMA_CxCR.EN is asserted.
bits : 9 - 9 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no software request. The selected hardware request REQSEL[6:0] is taken into account.
0x1 : B_0x1
software request for a memory-to-memory transfer. The default selected hardware request as per REQSEL[6:0] is ignored.
End of enumeration elements list.
DREQ : destination hardware request This bit is ignored if channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer). Else: Note:
bits : 10 - 10 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
selected hardware request driven by a source peripheral (request signal taken into account by the GPDMA transfer scheduler over the source/read port)
0x1 : B_0x1
selected hardware request driven by a destination peripheral (request signal taken into account by the GPDMA transfer scheduler over the destination/write port)
End of enumeration elements list.
BREQ : Block hardware request If the channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer), this bit is ignored. Else:
bits : 11 - 11 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
the selected hardware request is driven by a peripheral with a hardware request/acknowledge protocol at a burst level.
0x1 : B_0x1
the selected hardware request is driven by a peripheral with a hardware request/acknowledge protocol at a block level (see ).
End of enumeration elements list.
TRIGM : trigger mode These bits define the transfer granularity for its conditioning by the trigger. If the channel x is enabled (GPDMA_CxCR.EN asserted) with TRIGPOL[1:0] = 00 or 11, these TRIGM[1:0] bits are ignored. Else, a GPDMA transfer is conditioned by at least one trigger hit: first burst read of a 2D/repeated block transfer is conditioned by one hit trigger. – If the peripheral is programmed as a source (DREQ = 0) of the LLI data transfer, each programmed burst read is conditioned. – If the peripheral is programmed as a destination (DREQ = 1) of the LLI data transfer, each programmed burst write is conditioned. The first memory burst read of a (possibly 2D/repeated) block, also named as the first ready FIFO-based source burst, is gated by the occurrence of both the hardware request and the first trigger hit. The GPDMA monitoring of a trigger for channel x is started when the channel is enabled/loaded with a new active trigger configuration: rising or falling edge on a selected trigger (TRIGPOL[1:0] = 01 or respectively TRIGPOL[1:0] = 10). The monitoring of this trigger is kept active during the triggered and uncompleted (data or link) transfer and if a new trigger is detected then, this hit is internally memorized to grant the next transfer, as long as the defined rising or falling edge is not modified, and the TRIGSEL[5:0] is not modified, and the channel is enabled. Transferring a next LLIn+1 that updates the GPDMA_CxTR2 with a new value for any of TRIGSEL[5:0] or TRIGPOL[1:0], resets the monitoring, trashing the memorized hit of the formerly defined LLIn trigger. After a first new trigger hitn+1 is memorized, if another second trigger hitn+2 is detected and if the hitn triggered transfer is still not completed, hitn+2 is lost and not memorized.memorized. A trigger overrun flag is reported (GPDMA_CxSR.TOF =1 ), and an interrupt is generated if enabled (GPDMA_CxCR.TOIE = 1). The channel is not automatically disabled by hardware due to a trigger overrun. Note: When the source block size is not a multiple of the source burst size and is a multiple of the source data width, then the last programmed source burst is not completed and is internally shorten to match the block size. In this case, if TRIGM[1:0] = 11 and (SWREQ =1 or (SWREQ = 0 and DREQ =0 )), the shortened burst transfer (by singles or/and by bursts of lower length) is conditioned once by the trigger. When the programmed destination burst is internally shortened by singles or/and by bursts of lower length (versus FIFO size, versus block size, 1-Kbyte boundary address crossing): if the trigger is conditioning the programmed destination burst (if TRIGM[1:0] = 11 and SWREQ = 0 and DREQ = 1), this shortened destination burst transfer is conditioned once by the trigger.
bits : 14 - 15 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at block level: the first burst read of each block transfer is conditioned by one hit trigger (channel x = 12 to 15, for each block if a 2D/repeated block is configured with GPDMA_CxBR1.BRC[10:0] ≠ 0).
0x1 : B_0x1
channel x = 0 to 11, same as 00 channel x=12 to 15, at 2D/repeated block level, the
0x2 : B_0x2
at link level: a LLI link transfer is conditioned by one hit trigger. The LLI data transfer (if any) is not conditioned.
0x3 : B_0x3
at programmed burst level: If SWREQ = 1, each programmed burst read is conditioned by one hit trigger. If SWREQ = 0, each programmed burst that is requested by the selected peripheral, is conditioned by one hit trigger.
End of enumeration elements list.
TRIGSEL : trigger event input selection These bits select the trigger event input of the GPDMA transfer (as per ), with an active trigger event if TRIGPOL[1:0] ≠ 00.
bits : 16 - 21 (6 bit)
access : read-write
TRIGPOL : trigger event polarity These bits define the polarity of the selected trigger event input defined by TRIGSEL[5:0].
bits : 24 - 25 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no trigger (masked trigger event)
0x1 : B_0x1
trigger on the rising edge
0x2 : B_0x2
trigger on the falling edge
0x3 : B_0x3
same as 00
End of enumeration elements list.
TCEM : transfer complete event mode These bits define the transfer granularity for the transfer complete and half transfer complete events generation. Note: If the initial LLI0 data transfer is null/void (directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] = 0), then neither the complete transfer event nor the half transfer event is generated. Note: If the initial LLI0 data transfer is null/void (directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] = 0), then neither the complete transfer event nor the half transfer event is generated. Note: If the initial LLI0 data transfer is null/void (i.e. directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] =0 ), then the half transfer event is not generated, and the transfer complete event is generated when is completed the loading of the LLI1.
bits : 30 - 31 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at block level (when GPDMA_CxBR1.BNDT[15:0] = 0): the complete (and the half) transfer event is generated at the (respectively half of the) end of a block.
0x1 : B_0x1
channel x = 0 to 11, same as 00 channel x=12 to 15, at 2D/repeated block level (when GPDMA_CxBR1.BRC[10:0] = 0 and GPDMA_CxBR1.BNDT[15:0] = 0), the complete (and the half) transfer event is generated at the end (respectively half of the end) of the 2D/repeated block.
0x2 : B_0x2
at LLI level: the complete transfer event is generated at the end of the LLI transfer, including the update of the LLI if any. The half transfer event is generated at the half of the LLI data transfer (the LLI data transfer being a block transfer or a 2D/repeated block transfer for channel x = 12 to 15), if any data transfer.
0x3 : B_0x3
at channel level: the complete transfer event is generated at the end of the last LLI transfer. The half transfer event is generated at the half of the data transfer of the last LLI. The last LLI updates the link address GPDMA_CxLLR.LA[15:2] to zero and clears all the GPDMA_CxLLR update bits (UT1, UT2, UB1, USA, UDA and ULL, plus UT3 and UB2 if present). If the channel transfer is continuous/infinite, no event is generated.
End of enumeration elements list.
GPDMA channel 10 block register 1
address_offset : 0x598 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
BNDT : block number of data bytes to transfer from the source Block size transferred from the source. When the channel is enabled, this field becomes read-only and is decremented, indicating the remaining number of data items in the current source block to be transferred. BNDT[15:0] is programmed in number of bytes, maximum source block size is 64 Kbytes -1. Once the last data transfer is completed (BNDT[15:0] = 0): - if GPDMA_CxLLR.UB1 = 1, this field is updated by the LLI in the memory. - if GPDMA_CxLLR.UB1 = 0 and if there is at least one non null Uxx update bit, this field is internally restored to the programmed value. - if all GPDMA_CxLLR.Uxx = 0 and if GPDMA_CxLLR.LA[15:0] = 0, this field is internally restored to the programmed value (infinite/continuous last LLI). - if GPDMA_CxLLR = 0, this field is kept as zero following the last LLI data transfer. Note: A non-null source block size must be a multiple of the source data width (BNDT[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued. When configured in packing mode (GPDMA_CxTR1.PAM[1] = 1 and destination data width different from source data width), a non-null source block size must be a multiple of the destination data width (BNDT[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued.
bits : 0 - 15 (16 bit)
access : read-write
GPDMA channel 10 source address register
address_offset : 0x59C Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SA : source address This field is the pointer to the address from which the next data is read. During the channel activity, depending on the source addressing mode (GPDMA_CxTR1.SINC), this field is kept fixed or incremented by the data width (GPDMA_CxTR1.SDW_LOG2[1:0]) after each single source data, reflecting the next address from which data is read. During the channel activity, this address is updated after each completed source burst, consequently to: the programmed source burst either in fixed addressing mode or in contiguous-data incremented mode. If contiguously incremented (GPDMA_CxTR1.SINC = 1), then the additional address offset value is the programmed burst size, as defined by GPDMA_CxTR1.SBL_1[5:0] and GPDMA_CxTR1.SDW_LOG2[21:0] the additional source incremented/decremented offset value as programmed by GPDMA_CxBR1.SDEC and GPDMA_CxTR3.SAO[12:0] once/if completed source block transfer, for a channel x with 2D addressing capability (x = 12 to 15). additional block repeat source incremented/decremented offset value as programmed by GPDMA_CxBR1.BRSDEC and GPDMA_CxBR2.BRSAO[15:0] In linked-list mode, after a LLI data transfer is completed, this register is automatically updated by GPDMA from the memory, provided the LLI is set with GPDMA_CxLLR.USA = 1. Note: A source address must be aligned with the programmed data width of a source single (SA[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued. When the source block size is not a multiple of the source burst size and is a multiple of the source data width, the last programmed source burst is not completed and is internally shorten to match the block size. In this case, the additional GPDMA_CxTR3.SAO[12:0] is not applied.
bits : 0 - 31 (32 bit)
access : read-write
GPDMA channel 10 destination address register
address_offset : 0x5A0 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
DA : destination address This field is the pointer to the address from which the next data is written. During the channel activity, depending on the destination addressing mode (GPDMA_CxTR1.DINC), this field is kept fixed or incremented by the data width (GPDMA_CxTR1.DDW_LOG2[21:0]) after each single destination data, reflecting the next address from which data is written. During the channel activity, this address is updated after each completed destination burst, consequently to: the programmed destination burst either in fixed addressing mode or in contiguous-data incremented mode. If contiguously incremented (GPDMA_CxTR1.DINC = 1), then the additional address offset value is the programmed burst size, as defined by GPDMA_CxTR1.DBL_1[5:0] and GPDMA_CxTR1.DDW_LOG2[1:0] the additional destination incremented/decremented offset value as programmed by GPDMA_CxBR1.DDEC and GPDMA_CxTR3.DAO[12:0] once/if completed destination block transfer, for a channel x with 2D addressing capability (x = 12 to 15), the additional block repeat destination incremented/decremented offset value as programmed by GPDMA_CxBR1.BRDDEC and GPDMA_CxBR2.BRDAO[15:0] In linked-list mode, after a LLI data transfer is completed, this register is automatically updated by the GPDMA from the memory, provided the LLI is set with GPDMA_CxLLR.UDA = 1. Note: A destination address must be aligned with the programmed data width of a destination burst (DA[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued.
bits : 0 - 31 (32 bit)
access : read-write
GPDMA channel 0 flag clear register
address_offset : 0x5C Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
TCF : transfer complete flag clear
bits : 8 - 8 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding TCF flag cleared
End of enumeration elements list.
HTF : half transfer flag clear
bits : 9 - 9 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding HTF flag cleared
End of enumeration elements list.
DTEF : data transfer error flag clear
bits : 10 - 10 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding DTEF flag cleared
End of enumeration elements list.
ULEF : update link transfer error flag clear
bits : 11 - 11 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding ULEF flag cleared
End of enumeration elements list.
USEF : user setting error flag clear
bits : 12 - 12 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding USEF flag cleared
End of enumeration elements list.
SUSPF : completed suspension flag clear
bits : 13 - 13 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding SUSPF flag cleared
End of enumeration elements list.
TOF : trigger overrun flag clear
bits : 14 - 14 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding TOF flag cleared
End of enumeration elements list.
GPDMA channel 10 linked-list address register
address_offset : 0x5CC Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
LA : pointer (16-bit low-significant address) to the next linked-list data structure If UT1 = UT2 = UB1 = USA = UDA = ULL = 0 and if LA[15:20] = 0, the current LLI is the last one. The channel transfer is completed without any update of the linked-list GPDMA register file. Else, this field is the pointer to the memory address offset from which the next linked-list data structure is automatically fetched from, once the data transfer is completed, in order to conditionally update the linked-list GPDMA internal register file (GPDMA_CxCTR1, GPDMA_CxTR2, GPDMA_CxBR1, GPDMA_CxSAR, GPDMA_CxDAR and GPDMA_CxLLR). Note: The user must program the pointer to be 32-bit aligned. The two low-significant bits are write ignored.
bits : 2 - 15 (14 bit)
access : read-write
ULL : Update GPDMA_CxLLR register from memory This bit is used to control the update of GPDMA_CxLLR from the memory during the link transfer.
bits : 16 - 16 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxLLR update
0x1 : B_0x1
GPDMA_CxLLR update
End of enumeration elements list.
UDA : Update GPDMA_CxDAR register from memory This bit is used to control the update of GPDMA_CxDAR from the memory during the link transfer.
bits : 27 - 27 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxDAR update
0x1 : B_0x1
GPDMA_CxDAR update
End of enumeration elements list.
USA : update GPDMA_CxSAR from memory This bit controls the update of GPDMA_CxSAR from the memory during the link transfer.
bits : 28 - 28 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxSAR update
0x1 : B_0x1
GPDMA_CxSAR update
End of enumeration elements list.
UB1 : Update GPDMA_CxBR1 from memory This bit controls the update of GPDMA_CxBR1 from the memory during the link transfer. If UB1 = 0 and if GPDMA_CxLLR ≠ 0, the linked-list is not completed. GPDMA_CxBR1.BNDT[15:0] is then restored to the programmed value after data transfer is completed and before the link transfer.
bits : 29 - 29 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxBR1 update from memory (GPDMA_CxBR1.BNDT[15:0] restored if any link transfer)
0x1 : B_0x1
GPDMA_CxBR1 update
End of enumeration elements list.
UT2 : Update GPDMA_CxTR2 from memory This bit controls the update of GPDMA_CxTR2 from the memory during the link transfer.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR2 update
0x1 : B_0x1
GPDMA_CxTR2 update
End of enumeration elements list.
UT1 : Update GPDMA_CxTR1 from memory This bit controls the update of GPDMA_CxTR1 from the memory during the link transfer.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR1 update
0x1 : B_0x1
GPDMA_CxTR1 update
End of enumeration elements list.
GPDMA channel 11 linked-list base address register
address_offset : 0x5D0 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
LBA : linked-list base address of GPDMA channel x
bits : 16 - 31 (16 bit)
access : read-write
GPDMA channel 11 flag clear register
address_offset : 0x5DC Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
TCF : transfer complete flag clear
bits : 8 - 8 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding TCF flag cleared
End of enumeration elements list.
HTF : half transfer flag clear
bits : 9 - 9 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding HTF flag cleared
End of enumeration elements list.
DTEF : data transfer error flag clear
bits : 10 - 10 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding DTEF flag cleared
End of enumeration elements list.
ULEF : update link transfer error flag clear
bits : 11 - 11 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding ULEF flag cleared
End of enumeration elements list.
USEF : user setting error flag clear
bits : 12 - 12 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding USEF flag cleared
End of enumeration elements list.
SUSPF : completed suspension flag clear
bits : 13 - 13 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding SUSPF flag cleared
End of enumeration elements list.
TOF : trigger overrun flag clear
bits : 14 - 14 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding TOF flag cleared
End of enumeration elements list.
GPDMA channel 11 status register
address_offset : 0x5E0 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
IDLEF : idle flag This idle flag is de-asserted by hardware when the channel is enabled (GPDMA_CxCR.EN = 1) with a valid channel configuration (no USEF to be immediately reported). This idle flag is asserted after hard reset or by hardware when the channel is back in idle state (in suspended or disabled state).
bits : 0 - 0 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
channel not in idle state
0x1 : B_0x1
channel in idle state
End of enumeration elements list.
TCF : transfer complete flag A transfer complete event is either a block transfer complete, a 2D/repeated block transfer complete, a LLI transfer complete including the upload of the next LLI if any, or the full linked-list completion, depending on the transfer complete event mode (GPDMA_CxTR2.TCEM[1:0]).
bits : 8 - 8 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no transfer complete event
0x1 : B_0x1
a transfer complete event occurred
End of enumeration elements list.
HTF : half transfer flag An half transfer event is either an half block transfer or an half 2D/repeated block transfer, depending on the transfer complete event mode (GPDMA_CxTR2.TCEM[1:0]). An half block transfer occurs when half of the bytes of the source block size (rounded up integer of GPDMA_CxBR1.BNDT[15:0]/2) has been transferred to the destination. An half 2D/repeated block transfer occurs when half of the repeated blocks (rounded up integer of (GPDMA_CxBR1.BRC[10:0]+1)/2)) has been transferred to the destination.
bits : 9 - 9 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no half transfer event
0x1 : B_0x1
an half transfer event occurred
End of enumeration elements list.
DTEF : data transfer error flag
bits : 10 - 10 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no data transfer error event
0x1 : B_0x1
a master bus error event occurred on a data transfer
End of enumeration elements list.
ULEF : update link transfer error flag
bits : 11 - 11 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no update link transfer error event
0x1 : B_0x1
a master bus error event occurred while updating a linked-list register from memory
End of enumeration elements list.
USEF : user setting error flag
bits : 12 - 12 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no user setting error event
0x1 : B_0x1
a user setting error event occurred
End of enumeration elements list.
SUSPF : completed suspension flag
bits : 13 - 13 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no completed suspension event
0x1 : B_0x1
a completed suspension event occurred
End of enumeration elements list.
TOF : trigger overrun flag
bits : 14 - 14 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no trigger overrun event
0x1 : B_0x1
a trigger overrun event occurred
End of enumeration elements list.
FIFOL : monitored FIFO level Number of available write beats in the FIFO, in units of the programmed destination data width (see GPDMA_CxTR1.DDW_LOG2[1:0], in units of bytes, half-words, or words). Note: After having suspended an active transfer, the user may need to read FIFOL[7:0], additionally to GPDMA_CxBR1.BDNT[15:0] and GPDMA_CxBR1.BRC[10:0], to know how many data have been transferred to the destination. Before reading, the user may wait for the transfer to be suspended (GPDMA_CxSR.SUSPF = 1).
bits : 16 - 23 (8 bit)
access : read-only
GPDMA channel 11 control register
address_offset : 0x5E4 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
EN : enable Writing 1 into the field RESET (bit 1) causes the hardware to de-assert this bit, whatever is written into this bit 0. Else: this bit is de-asserted by hardware when there is a transfer error (master bus error or user setting error) or when there is a channel transfer complete (channel ready to be configured, e.g. if LSM=1 at the end of a single execution of the LLI). Else, this bit can be asserted by software. Writing 0 into this EN bit is ignored.
bits : 0 - 0 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
write: ignored, read: channel disabled
0x1 : B_0x1
write: enable channel, read: channel enabled
End of enumeration elements list.
RESET : reset This bit is write only. Writing 0 has no impact. Writing 1 implies the reset of the following: the FIFO, the channel internal state, SUSP and EN bits (whatever is written receptively in bit 2 and bit 0). The reset is effective when the channel is in steady state, meaning one of the following: - active channel in suspended state (GPDMA_CxSR.SUSPF = 1 and GPDMA_CxSR.IDLEF = GPDMA_CxCR.EN = 1) - channel in disabled state (GPDMA_CxSR.IDLEF = 1 and GPDMA_CxCR.EN = 0). After writing a RESET, to continue using this channel, the user must explicitly reconfigure the channel including the hardware-modified configuration registers (GPDMA_CxBR1, GPDMA_CxSAR and GPDMA_CxDAR) before enabling again the channel (see the programming sequence in ).
bits : 1 - 1 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no channel reset
0x1 : B_0x1
channel reset
End of enumeration elements list.
SUSP : suspend Writing 1 into the field RESET (bit 1) causes the hardware to de-assert this bit, whatever is written into this bit 2. Else: Software must write 1 in order to suspend an active channel i.e. a channel with an on-going GPDMA transfer over its master ports. The software must write 0 in order to resume a suspended channel, following the programming sequence detailed in .
bits : 2 - 2 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
write: resume channel, read: channel not suspended
0x1 : B_0x1
write: suspend channel, read: channel suspended.
End of enumeration elements list.
TCIE : transfer complete interrupt enable
bits : 8 - 8 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
HTIE : half transfer complete interrupt enable
bits : 9 - 9 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
DTEIE : data transfer error interrupt enable
bits : 10 - 10 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
ULEIE : update link transfer error interrupt enable
bits : 11 - 11 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
USEIE : user setting error interrupt enable
bits : 12 - 12 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
SUSPIE : completed suspension interrupt enable
bits : 13 - 13 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
TOIE : trigger overrun interrupt enable
bits : 14 - 14 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
LSM : Link step mode First the (possible 1D/repeated) block transfer is executed as defined by the current internal register file until GPDMA_CxBR1.BNDT[15:0] = 0 and GPDMA_CxBR1.BRC[10:0] = 0 if present. Secondly the next linked-list data structure is conditionally uploaded from memory as defined by GPDMA_CxLLR. Then channel execution is completed. Note: This bit must be written when EN=0. This bit is read-only when EN=1.
bits : 16 - 16 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
channel executed for the full linked-list and completed at the end of the last LLI (GPDMA_CxLLR = 0). The 16 low-significant bits of the link address are null (LA[15:0] = 0) and all the update bits are null (UT1 =UB1 = UT2 = USA = UDA = ULL = 0 and UT3 = UB2 = 0 if present). Then GPDMA_CxBR1.BNDT[15:0] = 0 and GPDMA_CxBR1.BRC[10:0] = 0 if present.
0x1 : B_0x1
channel executed once for the current LLI
End of enumeration elements list.
LAP : linked-list allocated port This bit is used to allocate the master port for the update of the GPDMA linked-list registers from the memory. Note: This bit must be written when EN=0. This bit is read-only when EN=1.
bits : 17 - 17 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
PRIO : priority level of the channel x GPDMA transfer versus others Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 22 - 23 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
low priority, low weight
0x1 : B_0x1
low priority, mid weight
0x2 : B_0x2
low priority, high weight
0x3 : B_0x3
high priority
End of enumeration elements list.
GPDMA channel 0 status register
address_offset : 0x60 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
IDLEF : idle flag This idle flag is de-asserted by hardware when the channel is enabled (GPDMA_CxCR.EN = 1) with a valid channel configuration (no USEF to be immediately reported). This idle flag is asserted after hard reset or by hardware when the channel is back in idle state (in suspended or disabled state).
bits : 0 - 0 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
channel not in idle state
0x1 : B_0x1
channel in idle state
End of enumeration elements list.
TCF : transfer complete flag A transfer complete event is either a block transfer complete, a 2D/repeated block transfer complete, a LLI transfer complete including the upload of the next LLI if any, or the full linked-list completion, depending on the transfer complete event mode (GPDMA_CxTR2.TCEM[1:0]).
bits : 8 - 8 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no transfer complete event
0x1 : B_0x1
a transfer complete event occurred
End of enumeration elements list.
HTF : half transfer flag An half transfer event is either an half block transfer or an half 2D/repeated block transfer, depending on the transfer complete event mode (GPDMA_CxTR2.TCEM[1:0]). An half block transfer occurs when half of the bytes of the source block size (rounded up integer of GPDMA_CxBR1.BNDT[15:0]/2) has been transferred to the destination. An half 2D/repeated block transfer occurs when half of the repeated blocks (rounded up integer of (GPDMA_CxBR1.BRC[10:0]+1)/2)) has been transferred to the destination.
bits : 9 - 9 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no half transfer event
0x1 : B_0x1
an half transfer event occurred
End of enumeration elements list.
DTEF : data transfer error flag
bits : 10 - 10 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no data transfer error event
0x1 : B_0x1
a master bus error event occurred on a data transfer
End of enumeration elements list.
ULEF : update link transfer error flag
bits : 11 - 11 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no update link transfer error event
0x1 : B_0x1
a master bus error event occurred while updating a linked-list register from memory
End of enumeration elements list.
USEF : user setting error flag
bits : 12 - 12 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no user setting error event
0x1 : B_0x1
a user setting error event occurred
End of enumeration elements list.
SUSPF : completed suspension flag
bits : 13 - 13 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no completed suspension event
0x1 : B_0x1
a completed suspension event occurred
End of enumeration elements list.
TOF : trigger overrun flag
bits : 14 - 14 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no trigger overrun event
0x1 : B_0x1
a trigger overrun event occurred
End of enumeration elements list.
FIFOL : monitored FIFO level Number of available write beats in the FIFO, in units of the programmed destination data width (see GPDMA_CxTR1.DDW_LOG2[1:0], in units of bytes, half-words, or words). Note: After having suspended an active transfer, the user may need to read FIFOL[7:0], additionally to GPDMA_CxBR1.BDNT[15:0] and GPDMA_CxBR1.BRC[10:0], to know how many data have been transferred to the destination. Before reading, the user may wait for the transfer to be suspended (GPDMA_CxSR.SUSPF = 1).
bits : 16 - 23 (8 bit)
access : read-only
GPDMA channel 11 transfer register 1
address_offset : 0x610 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SDW_LOG2 : binary logarithm of the source data width of a burst in bytes Note: Setting a 8-byte data width causes a user setting error to be reported and no transfer is issued. A source block size must be a multiple of the source data width (GPDMA_CxBR1.BNDT[2:0] versus SDW_LOG2[1:0]). Otherwise, a user setting error is reported and no transfer is issued. A source single transfer must have an aligned address with its data width (start address GPDMA_CxSAR[2:0] versus SDW_LOG2[1:0]). Otherwise, a user setting error is reported and none transfer is issued.
bits : 0 - 1 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
byte
0x1 : B_0x1
half-word (2 bytes)
0x2 : B_0x2
word (4 bytes)
0x3 : B_0x3
user setting error reported and no transfer issued
End of enumeration elements list.
SINC : source incrementing burst The source address, pointed by GPDMA_CxSAR, is kept constant after a burst beat/single transfer or is incremented by the offset value corresponding to a contiguous data after a burst beat/single transfer.
bits : 3 - 3 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
fixed burst
0x1 : B_0x1
contiguously incremented burst
End of enumeration elements list.
SBL_1 : source burst length minus 1, between 0 and 63 The burst length unit is one data named beat within a burst. If SBL_1[5:0] =0 , the burst can be named as single. Each data/beat has a width defined by the destination data width SDW_LOG2[1:0]. Note: If a burst transfer crossed a 1-Kbyte address boundary on a AHB transfer, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the AHB protocol. If a burst transfer is of length greater than the FIFO size of the channel x, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the FIFO size. Transfer performance is lower, with GPDMA re-arbitration between effective and lower bursts/singles, but the data integrity is guaranteed.
bits : 4 - 9 (6 bit)
access : read-write
PAM : padding/alignment mode If DDW_LOG2[1:0] = SDW_LOG2[1:0]: if the data width of a burst destination transfer is equal to the data width of a burst source transfer, these bits are ignored. Else: - Case 1: If destination data width > source data width 1x: successive source data are FIFO queued and packed at the destination data width, in a left (LSB) to right (MSB) order (named little endian), before a destination transfer - Case 2: If destination data width < source data width 1x: source data is FIFO queued and unpacked at the destination data width, to be transferred in a left (LSB) to right (MSB) order (named little endian) to the destination Note:
bits : 11 - 12 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
source data is transferred as right aligned, left-truncated down to the destination data width
0x1 : B_0x1
source data is transferred as left-aligned, right-truncated down to the destination data width
0x0 : B_0x0
source data is transferred as right aligned, left-truncated down to the destination data width
0x1 : B_0x1
source data is transferred as left-aligned, right-truncated down to the destination data width
End of enumeration elements list.
SBX : source byte exchange within the unaligned half-word of each source word If the source data width is shorter than a word, this bit is ignored. If the source data width is a word:
bits : 13 - 13 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no byte-based exchange within the unaligned half-word of each source word
0x1 : B_0x1
the two consecutive bytes within the unaligned half-word of each source word are exchanged.
End of enumeration elements list.
SAP : source allocated port This bit is used to allocate the master port for the source transfer Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 14 - 14 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
SSEC : security attribute of the GPDMA transfer from the source If GPDMA_SECCFGR.SECx = 1 and the access is secure: This is a secure register bit. This bit can only be read by a secure software. This bit must be written by a secure software when GPDMA_SECCFGR.SECx =1 . A secure write is ignored when GPDMA_SECCFGR.SECx = 0. When GPDMA_SECCFGR.SECx is de-asserted, this SSEC bit is also de-asserted by hardware (on a secure reconfiguration of the channel as non-secure), and the GPDMA transfer from the source is non-secure.
bits : 15 - 15 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
GPDMA transfer non-secure
0x1 : B_0x1
GPDMA transfer secure
End of enumeration elements list.
DDW_LOG2 : binary logarithm of the destination data width of a burst, in bytes Note: Setting a 8-byte data width causes a user setting error to be reported and none transfer is issued. A destination burst transfer must have an aligned address with its data width (start address GPDMA_CxDAR[2:0] and address offset GPDMA_CxTR3.DAO[2:0], versus DDW_LOG2[1:0]). Otherwise a user setting error is reported and no transfer is issued.
bits : 16 - 17 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
byte
0x1 : B_0x1
half-word (2 bytes)
0x2 : B_0x2
word (4 bytes)
0x3 : B_0x3
user setting error reported and no transfer issued
End of enumeration elements list.
DINC : destination incrementing burst The destination address, pointed by GPDMA_CxDAR, is kept constant after a burst beat/single transfer, or is incremented by the offset value corresponding to a contiguous data after a burst beat/single transfer.
bits : 19 - 19 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
fixed burst
0x1 : B_0x1
contiguously incremented burst
End of enumeration elements list.
DBL_1 : destination burst length minus 1, between 0 and 63 The burst length unit is one data named beat within a burst. If DBL_1[5:0] =0 , the burst can be named as single. Each data/beat has a width defined by the destination data width DDW_LOG2[1:0]. Note: If a burst transfer crossed a 1-Kbyte address boundary on a AHB transfer, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the AHB protocol. If a burst transfer is of length greater than the FIFO size of the channel x, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the FIFO size. Transfer performance is lower, with GPDMA re-arbitration between effective and lower bursts/singles, but the data integrity is guaranteed.
bits : 20 - 25 (6 bit)
access : read-write
DBX : destination byte exchange If the destination data size is a byte, this bit is ignored. If the destination data size is not a byte:
bits : 26 - 26 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no byte-based exchange within half-word
0x1 : B_0x1
the two consecutive (post PAM) bytes are exchanged in each destination half-word.
End of enumeration elements list.
DHX : destination half-word exchange If the destination data size is shorter than a word, this bit is ignored. If the destination data size is a word:
bits : 27 - 27 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no halfword-based exchanged within word
0x1 : B_0x1
the two consecutive (post PAM) half-words are exchanged in each destination word.
End of enumeration elements list.
DAP : destination allocated port This bit is used to allocate the master port for the destination transfer Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
DSEC : security attribute of the GPDMA transfer to the destination If GPDMA_SECCFGR.SECx = 1 and the access is secure: This is a secure register bit. This bit can only be read by a secure software. This bit must be written by a secure software when GPDMA_SECCFGR.SECx = 1. A secure write is ignored when GPDMA_SECCFGR.SECx = 0. When GPDMA_SECCFGR.SECx is de-asserted, this DSEC bit is also de-asserted by hardware (on a secure reconfiguration of the channel as non-secure), and the GPDMA transfer to the destination is non-secure.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
GPDMA transfer non-secure
0x1 : B_0x1
GPDMA transfer secure
End of enumeration elements list.
GPDMA channel 11 transfer register 2
address_offset : 0x614 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
REQSEL : GPDMA hardware request selection These bits are ignored if channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer). Else, the selected hardware request is internally taken into account as per . The user must not assign a same input hardware request (same REQSEL[6:0] value) to different active GPDMA channels (GPDMA_CxCR.EN = 1 and GPDMA_CxTR2.SWREQ = 0 for these channels). GPDMA is not intended to hardware support the case of simultaneous enabled channels incorrectly configured with a same hardware peripheral request signal, and there is no user setting error reporting.
bits : 0 - 6 (7 bit)
access : read-write
SWREQ : software request This bit is internally taken into account when GPDMA_CxCR.EN is asserted.
bits : 9 - 9 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no software request. The selected hardware request REQSEL[6:0] is taken into account.
0x1 : B_0x1
software request for a memory-to-memory transfer. The default selected hardware request as per REQSEL[6:0] is ignored.
End of enumeration elements list.
DREQ : destination hardware request This bit is ignored if channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer). Else: Note:
bits : 10 - 10 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
selected hardware request driven by a source peripheral (request signal taken into account by the GPDMA transfer scheduler over the source/read port)
0x1 : B_0x1
selected hardware request driven by a destination peripheral (request signal taken into account by the GPDMA transfer scheduler over the destination/write port)
End of enumeration elements list.
BREQ : Block hardware request If the channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer), this bit is ignored. Else:
bits : 11 - 11 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
the selected hardware request is driven by a peripheral with a hardware request/acknowledge protocol at a burst level.
0x1 : B_0x1
the selected hardware request is driven by a peripheral with a hardware request/acknowledge protocol at a block level (see ).
End of enumeration elements list.
TRIGM : trigger mode These bits define the transfer granularity for its conditioning by the trigger. If the channel x is enabled (GPDMA_CxCR.EN asserted) with TRIGPOL[1:0] = 00 or 11, these TRIGM[1:0] bits are ignored. Else, a GPDMA transfer is conditioned by at least one trigger hit: first burst read of a 2D/repeated block transfer is conditioned by one hit trigger. – If the peripheral is programmed as a source (DREQ = 0) of the LLI data transfer, each programmed burst read is conditioned. – If the peripheral is programmed as a destination (DREQ = 1) of the LLI data transfer, each programmed burst write is conditioned. The first memory burst read of a (possibly 2D/repeated) block, also named as the first ready FIFO-based source burst, is gated by the occurrence of both the hardware request and the first trigger hit. The GPDMA monitoring of a trigger for channel x is started when the channel is enabled/loaded with a new active trigger configuration: rising or falling edge on a selected trigger (TRIGPOL[1:0] = 01 or respectively TRIGPOL[1:0] = 10). The monitoring of this trigger is kept active during the triggered and uncompleted (data or link) transfer and if a new trigger is detected then, this hit is internally memorized to grant the next transfer, as long as the defined rising or falling edge is not modified, and the TRIGSEL[5:0] is not modified, and the channel is enabled. Transferring a next LLIn+1 that updates the GPDMA_CxTR2 with a new value for any of TRIGSEL[5:0] or TRIGPOL[1:0], resets the monitoring, trashing the memorized hit of the formerly defined LLIn trigger. After a first new trigger hitn+1 is memorized, if another second trigger hitn+2 is detected and if the hitn triggered transfer is still not completed, hitn+2 is lost and not memorized.memorized. A trigger overrun flag is reported (GPDMA_CxSR.TOF =1 ), and an interrupt is generated if enabled (GPDMA_CxCR.TOIE = 1). The channel is not automatically disabled by hardware due to a trigger overrun. Note: When the source block size is not a multiple of the source burst size and is a multiple of the source data width, then the last programmed source burst is not completed and is internally shorten to match the block size. In this case, if TRIGM[1:0] = 11 and (SWREQ =1 or (SWREQ = 0 and DREQ =0 )), the shortened burst transfer (by singles or/and by bursts of lower length) is conditioned once by the trigger. When the programmed destination burst is internally shortened by singles or/and by bursts of lower length (versus FIFO size, versus block size, 1-Kbyte boundary address crossing): if the trigger is conditioning the programmed destination burst (if TRIGM[1:0] = 11 and SWREQ = 0 and DREQ = 1), this shortened destination burst transfer is conditioned once by the trigger.
bits : 14 - 15 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at block level: the first burst read of each block transfer is conditioned by one hit trigger (channel x = 12 to 15, for each block if a 2D/repeated block is configured with GPDMA_CxBR1.BRC[10:0] ≠ 0).
0x1 : B_0x1
channel x = 0 to 11, same as 00 channel x=12 to 15, at 2D/repeated block level, the
0x2 : B_0x2
at link level: a LLI link transfer is conditioned by one hit trigger. The LLI data transfer (if any) is not conditioned.
0x3 : B_0x3
at programmed burst level: If SWREQ = 1, each programmed burst read is conditioned by one hit trigger. If SWREQ = 0, each programmed burst that is requested by the selected peripheral, is conditioned by one hit trigger.
End of enumeration elements list.
TRIGSEL : trigger event input selection These bits select the trigger event input of the GPDMA transfer (as per ), with an active trigger event if TRIGPOL[1:0] ≠ 00.
bits : 16 - 21 (6 bit)
access : read-write
TRIGPOL : trigger event polarity These bits define the polarity of the selected trigger event input defined by TRIGSEL[5:0].
bits : 24 - 25 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no trigger (masked trigger event)
0x1 : B_0x1
trigger on the rising edge
0x2 : B_0x2
trigger on the falling edge
0x3 : B_0x3
same as 00
End of enumeration elements list.
TCEM : transfer complete event mode These bits define the transfer granularity for the transfer complete and half transfer complete events generation. Note: If the initial LLI0 data transfer is null/void (directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] = 0), then neither the complete transfer event nor the half transfer event is generated. Note: If the initial LLI0 data transfer is null/void (directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] = 0), then neither the complete transfer event nor the half transfer event is generated. Note: If the initial LLI0 data transfer is null/void (i.e. directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] =0 ), then the half transfer event is not generated, and the transfer complete event is generated when is completed the loading of the LLI1.
bits : 30 - 31 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at block level (when GPDMA_CxBR1.BNDT[15:0] = 0): the complete (and the half) transfer event is generated at the (respectively half of the) end of a block.
0x1 : B_0x1
channel x = 0 to 11, same as 00 channel x=12 to 15, at 2D/repeated block level (when GPDMA_CxBR1.BRC[10:0] = 0 and GPDMA_CxBR1.BNDT[15:0] = 0), the complete (and the half) transfer event is generated at the end (respectively half of the end) of the 2D/repeated block.
0x2 : B_0x2
at LLI level: the complete transfer event is generated at the end of the LLI transfer, including the update of the LLI if any. The half transfer event is generated at the half of the LLI data transfer (the LLI data transfer being a block transfer or a 2D/repeated block transfer for channel x = 12 to 15), if any data transfer.
0x3 : B_0x3
at channel level: the complete transfer event is generated at the end of the last LLI transfer. The half transfer event is generated at the half of the data transfer of the last LLI. The last LLI updates the link address GPDMA_CxLLR.LA[15:2] to zero and clears all the GPDMA_CxLLR update bits (UT1, UT2, UB1, USA, UDA and ULL, plus UT3 and UB2 if present). If the channel transfer is continuous/infinite, no event is generated.
End of enumeration elements list.
GPDMA channel 11 block register 1
address_offset : 0x618 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
BNDT : block number of data bytes to transfer from the source Block size transferred from the source. When the channel is enabled, this field becomes read-only and is decremented, indicating the remaining number of data items in the current source block to be transferred. BNDT[15:0] is programmed in number of bytes, maximum source block size is 64 Kbytes -1. Once the last data transfer is completed (BNDT[15:0] = 0): - if GPDMA_CxLLR.UB1 = 1, this field is updated by the LLI in the memory. - if GPDMA_CxLLR.UB1 = 0 and if there is at least one non null Uxx update bit, this field is internally restored to the programmed value. - if all GPDMA_CxLLR.Uxx = 0 and if GPDMA_CxLLR.LA[15:0] = 0, this field is internally restored to the programmed value (infinite/continuous last LLI). - if GPDMA_CxLLR = 0, this field is kept as zero following the last LLI data transfer. Note: A non-null source block size must be a multiple of the source data width (BNDT[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued. When configured in packing mode (GPDMA_CxTR1.PAM[1] = 1 and destination data width different from source data width), a non-null source block size must be a multiple of the destination data width (BNDT[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued.
bits : 0 - 15 (16 bit)
access : read-write
GPDMA channel 11 source address register
address_offset : 0x61C Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SA : source address This field is the pointer to the address from which the next data is read. During the channel activity, depending on the source addressing mode (GPDMA_CxTR1.SINC), this field is kept fixed or incremented by the data width (GPDMA_CxTR1.SDW_LOG2[1:0]) after each single source data, reflecting the next address from which data is read. During the channel activity, this address is updated after each completed source burst, consequently to: the programmed source burst either in fixed addressing mode or in contiguous-data incremented mode. If contiguously incremented (GPDMA_CxTR1.SINC = 1), then the additional address offset value is the programmed burst size, as defined by GPDMA_CxTR1.SBL_1[5:0] and GPDMA_CxTR1.SDW_LOG2[21:0] the additional source incremented/decremented offset value as programmed by GPDMA_CxBR1.SDEC and GPDMA_CxTR3.SAO[12:0] once/if completed source block transfer, for a channel x with 2D addressing capability (x = 12 to 15). additional block repeat source incremented/decremented offset value as programmed by GPDMA_CxBR1.BRSDEC and GPDMA_CxBR2.BRSAO[15:0] In linked-list mode, after a LLI data transfer is completed, this register is automatically updated by GPDMA from the memory, provided the LLI is set with GPDMA_CxLLR.USA = 1. Note: A source address must be aligned with the programmed data width of a source single (SA[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued. When the source block size is not a multiple of the source burst size and is a multiple of the source data width, the last programmed source burst is not completed and is internally shorten to match the block size. In this case, the additional GPDMA_CxTR3.SAO[12:0] is not applied.
bits : 0 - 31 (32 bit)
access : read-write
GPDMA channel 11 destination address register
address_offset : 0x620 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
DA : destination address This field is the pointer to the address from which the next data is written. During the channel activity, depending on the destination addressing mode (GPDMA_CxTR1.DINC), this field is kept fixed or incremented by the data width (GPDMA_CxTR1.DDW_LOG2[21:0]) after each single destination data, reflecting the next address from which data is written. During the channel activity, this address is updated after each completed destination burst, consequently to: the programmed destination burst either in fixed addressing mode or in contiguous-data incremented mode. If contiguously incremented (GPDMA_CxTR1.DINC = 1), then the additional address offset value is the programmed burst size, as defined by GPDMA_CxTR1.DBL_1[5:0] and GPDMA_CxTR1.DDW_LOG2[1:0] the additional destination incremented/decremented offset value as programmed by GPDMA_CxBR1.DDEC and GPDMA_CxTR3.DAO[12:0] once/if completed destination block transfer, for a channel x with 2D addressing capability (x = 12 to 15), the additional block repeat destination incremented/decremented offset value as programmed by GPDMA_CxBR1.BRDDEC and GPDMA_CxBR2.BRDAO[15:0] In linked-list mode, after a LLI data transfer is completed, this register is automatically updated by the GPDMA from the memory, provided the LLI is set with GPDMA_CxLLR.UDA = 1. Note: A destination address must be aligned with the programmed data width of a destination burst (DA[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued.
bits : 0 - 31 (32 bit)
access : read-write
GPDMA channel 0 control register
address_offset : 0x64 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
EN : enable Writing 1 into the field RESET (bit 1) causes the hardware to de-assert this bit, whatever is written into this bit 0. Else: this bit is de-asserted by hardware when there is a transfer error (master bus error or user setting error) or when there is a channel transfer complete (channel ready to be configured, e.g. if LSM=1 at the end of a single execution of the LLI). Else, this bit can be asserted by software. Writing 0 into this EN bit is ignored.
bits : 0 - 0 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
write: ignored, read: channel disabled
0x1 : B_0x1
write: enable channel, read: channel enabled
End of enumeration elements list.
RESET : reset This bit is write only. Writing 0 has no impact. Writing 1 implies the reset of the following: the FIFO, the channel internal state, SUSP and EN bits (whatever is written receptively in bit 2 and bit 0). The reset is effective when the channel is in steady state, meaning one of the following: - active channel in suspended state (GPDMA_CxSR.SUSPF = 1 and GPDMA_CxSR.IDLEF = GPDMA_CxCR.EN = 1) - channel in disabled state (GPDMA_CxSR.IDLEF = 1 and GPDMA_CxCR.EN = 0). After writing a RESET, to continue using this channel, the user must explicitly reconfigure the channel including the hardware-modified configuration registers (GPDMA_CxBR1, GPDMA_CxSAR and GPDMA_CxDAR) before enabling again the channel (see the programming sequence in ).
bits : 1 - 1 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no channel reset
0x1 : B_0x1
channel reset
End of enumeration elements list.
SUSP : suspend Writing 1 into the field RESET (bit 1) causes the hardware to de-assert this bit, whatever is written into this bit 2. Else: Software must write 1 in order to suspend an active channel i.e. a channel with an on-going GPDMA transfer over its master ports. The software must write 0 in order to resume a suspended channel, following the programming sequence detailed in .
bits : 2 - 2 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
write: resume channel, read: channel not suspended
0x1 : B_0x1
write: suspend channel, read: channel suspended.
End of enumeration elements list.
TCIE : transfer complete interrupt enable
bits : 8 - 8 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
HTIE : half transfer complete interrupt enable
bits : 9 - 9 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
DTEIE : data transfer error interrupt enable
bits : 10 - 10 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
ULEIE : update link transfer error interrupt enable
bits : 11 - 11 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
USEIE : user setting error interrupt enable
bits : 12 - 12 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
SUSPIE : completed suspension interrupt enable
bits : 13 - 13 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
TOIE : trigger overrun interrupt enable
bits : 14 - 14 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
LSM : Link step mode First the (possible 1D/repeated) block transfer is executed as defined by the current internal register file until GPDMA_CxBR1.BNDT[15:0] = 0 and GPDMA_CxBR1.BRC[10:0] = 0 if present. Secondly the next linked-list data structure is conditionally uploaded from memory as defined by GPDMA_CxLLR. Then channel execution is completed. Note: This bit must be written when EN=0. This bit is read-only when EN=1.
bits : 16 - 16 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
channel executed for the full linked-list and completed at the end of the last LLI (GPDMA_CxLLR = 0). The 16 low-significant bits of the link address are null (LA[15:0] = 0) and all the update bits are null (UT1 =UB1 = UT2 = USA = UDA = ULL = 0 and UT3 = UB2 = 0 if present). Then GPDMA_CxBR1.BNDT[15:0] = 0 and GPDMA_CxBR1.BRC[10:0] = 0 if present.
0x1 : B_0x1
channel executed once for the current LLI
End of enumeration elements list.
LAP : linked-list allocated port This bit is used to allocate the master port for the update of the GPDMA linked-list registers from the memory. Note: This bit must be written when EN=0. This bit is read-only when EN=1.
bits : 17 - 17 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
PRIO : priority level of the channel x GPDMA transfer versus others Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 22 - 23 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
low priority, low weight
0x1 : B_0x1
low priority, mid weight
0x2 : B_0x2
low priority, high weight
0x3 : B_0x3
high priority
End of enumeration elements list.
GPDMA channel 11 linked-list address register
address_offset : 0x64C Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
LA : pointer (16-bit low-significant address) to the next linked-list data structure If UT1 = UT2 = UB1 = USA = UDA = ULL = 0 and if LA[15:20] = 0, the current LLI is the last one. The channel transfer is completed without any update of the linked-list GPDMA register file. Else, this field is the pointer to the memory address offset from which the next linked-list data structure is automatically fetched from, once the data transfer is completed, in order to conditionally update the linked-list GPDMA internal register file (GPDMA_CxCTR1, GPDMA_CxTR2, GPDMA_CxBR1, GPDMA_CxSAR, GPDMA_CxDAR and GPDMA_CxLLR). Note: The user must program the pointer to be 32-bit aligned. The two low-significant bits are write ignored.
bits : 2 - 15 (14 bit)
access : read-write
ULL : Update GPDMA_CxLLR register from memory This bit is used to control the update of GPDMA_CxLLR from the memory during the link transfer.
bits : 16 - 16 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxLLR update
0x1 : B_0x1
GPDMA_CxLLR update
End of enumeration elements list.
UDA : Update GPDMA_CxDAR register from memory This bit is used to control the update of GPDMA_CxDAR from the memory during the link transfer.
bits : 27 - 27 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxDAR update
0x1 : B_0x1
GPDMA_CxDAR update
End of enumeration elements list.
USA : update GPDMA_CxSAR from memory This bit controls the update of GPDMA_CxSAR from the memory during the link transfer.
bits : 28 - 28 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxSAR update
0x1 : B_0x1
GPDMA_CxSAR update
End of enumeration elements list.
UB1 : Update GPDMA_CxBR1 from memory This bit controls the update of GPDMA_CxBR1 from the memory during the link transfer. If UB1 = 0 and if GPDMA_CxLLR ≠ 0, the linked-list is not completed. GPDMA_CxBR1.BNDT[15:0] is then restored to the programmed value after data transfer is completed and before the link transfer.
bits : 29 - 29 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxBR1 update from memory (GPDMA_CxBR1.BNDT[15:0] restored if any link transfer)
0x1 : B_0x1
GPDMA_CxBR1 update
End of enumeration elements list.
UT2 : Update GPDMA_CxTR2 from memory This bit controls the update of GPDMA_CxTR2 from the memory during the link transfer.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR2 update
0x1 : B_0x1
GPDMA_CxTR2 update
End of enumeration elements list.
UT1 : Update GPDMA_CxTR1 from memory This bit controls the update of GPDMA_CxTR1 from the memory during the link transfer.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR1 update
0x1 : B_0x1
GPDMA_CxTR1 update
End of enumeration elements list.
GPDMA channel 12 linked-list base address register
address_offset : 0x650 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
LBA : linked-list base address of GPDMA channel x
bits : 16 - 31 (16 bit)
access : read-write
GPDMA channel 12 flag clear register
address_offset : 0x65C Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
TCF : transfer complete flag clear
bits : 8 - 8 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding TCF flag cleared
End of enumeration elements list.
HTF : half transfer flag clear
bits : 9 - 9 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding HTF flag cleared
End of enumeration elements list.
DTEF : data transfer error flag clear
bits : 10 - 10 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding DTEF flag cleared
End of enumeration elements list.
ULEF : update link transfer error flag clear
bits : 11 - 11 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding ULEF flag cleared
End of enumeration elements list.
USEF : user setting error flag clear
bits : 12 - 12 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding USEF flag cleared
End of enumeration elements list.
SUSPF : completed suspension flag clear
bits : 13 - 13 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding SUSPF flag cleared
End of enumeration elements list.
TOF : trigger overrun flag clear
bits : 14 - 14 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding TOF flag cleared
End of enumeration elements list.
GPDMA channel 12 status register
address_offset : 0x660 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
IDLEF : idle flag This idle flag is de-asserted by hardware when the channel is enabled (GPDMA_CxCR.EN = 1) with a valid channel configuration (no USEF to be immediately reported). This idle flag is asserted after hard reset or by hardware when the channel is back in idle state (in suspended or disabled state).
bits : 0 - 0 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
channel not in idle state
0x1 : B_0x1
channel in idle state
End of enumeration elements list.
TCF : transfer complete flag A transfer complete event is either a block transfer complete, a 2D/repeated block transfer complete, a LLI transfer complete including the upload of the next LLI if any, or the full linked-list completion, depending on the transfer complete event mode (GPDMA_CxTR2.TCEM[1:0]).
bits : 8 - 8 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no transfer complete event
0x1 : B_0x1
a transfer complete event occurred
End of enumeration elements list.
HTF : half transfer flag An half transfer event is either an half block transfer or an half 2D/repeated block transfer, depending on the transfer complete event mode (GPDMA_CxTR2.TCEM[1:0]). An half block transfer occurs when half of the bytes of the source block size (rounded up integer of GPDMA_CxBR1.BNDT[15:0]/2) has been transferred to the destination. An half 2D/repeated block transfer occurs when half of the repeated blocks (rounded up integer of (GPDMA_CxBR1.BRC[10:0]+1)/2)) has been transferred to the destination.
bits : 9 - 9 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no half transfer event
0x1 : B_0x1
an half transfer event occurred
End of enumeration elements list.
DTEF : data transfer error flag
bits : 10 - 10 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no data transfer error event
0x1 : B_0x1
a master bus error event occurred on a data transfer
End of enumeration elements list.
ULEF : update link transfer error flag
bits : 11 - 11 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no update link transfer error event
0x1 : B_0x1
a master bus error event occurred while updating a linked-list register from memory
End of enumeration elements list.
USEF : user setting error flag
bits : 12 - 12 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no user setting error event
0x1 : B_0x1
a user setting error event occurred
End of enumeration elements list.
SUSPF : completed suspension flag
bits : 13 - 13 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no completed suspension event
0x1 : B_0x1
a completed suspension event occurred
End of enumeration elements list.
TOF : trigger overrun flag
bits : 14 - 14 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no trigger overrun event
0x1 : B_0x1
a trigger overrun event occurred
End of enumeration elements list.
FIFOL : monitored FIFO level Number of available write beats in the FIFO, in units of the programmed destination data width (see GPDMA_CxTR1.DDW_LOG2[1:0], in units of bytes, half-words, or words). Note: After having suspended an active transfer, the user may need to read FIFOL[7:0], additionally to GPDMA_CxBR1.BDNT[15:0] and GPDMA_CxBR1.BRC[10:0], to know how many data have been transferred to the destination. Before reading, the user may wait for the transfer to be suspended (GPDMA_CxSR.SUSPF = 1).
bits : 16 - 23 (8 bit)
access : read-only
GPDMA channel 12 control register
address_offset : 0x664 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
EN : enable Writing 1 into the field RESET (bit 1) causes the hardware to de-assert this bit, whatever is written into this bit 0. Else: this bit is de-asserted by hardware when there is a transfer error (master bus error or user setting error) or when there is a channel transfer complete (channel ready to be configured, e.g. if LSM=1 at the end of a single execution of the LLI). Else, this bit can be asserted by software. Writing 0 into this EN bit is ignored.
bits : 0 - 0 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
write: ignored, read: channel disabled
0x1 : B_0x1
write: enable channel, read: channel enabled
End of enumeration elements list.
RESET : reset This bit is write only. Writing 0 has no impact. Writing 1 implies the reset of the following: the FIFO, the channel internal state, SUSP and EN bits (whatever is written receptively in bit 2 and bit 0). The reset is effective when the channel is in steady state, meaning one of the following: - active channel in suspended state (GPDMA_CxSR.SUSPF = 1 and GPDMA_CxSR.IDLEF = GPDMA_CxCR.EN = 1) - channel in disabled state (GPDMA_CxSR.IDLEF = 1 and GPDMA_CxCR.EN = 0). After writing a RESET, to continue using this channel, the user must explicitly reconfigure the channel including the hardware-modified configuration registers (GPDMA_CxBR1, GPDMA_CxSAR and GPDMA_CxDAR) before enabling again the channel (see the programming sequence in ).
bits : 1 - 1 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no channel reset
0x1 : B_0x1
channel reset
End of enumeration elements list.
SUSP : suspend Writing 1 into the field RESET (bit 1) causes the hardware to de-assert this bit, whatever is written into this bit 2. Else: Software must write 1 in order to suspend an active channel i.e. a channel with an on-going GPDMA transfer over its master ports. The software must write 0 in order to resume a suspended channel, following the programming sequence detailed in .
bits : 2 - 2 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
write: resume channel, read: channel not suspended
0x1 : B_0x1
write: suspend channel, read: channel suspended.
End of enumeration elements list.
TCIE : transfer complete interrupt enable
bits : 8 - 8 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
HTIE : half transfer complete interrupt enable
bits : 9 - 9 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
DTEIE : data transfer error interrupt enable
bits : 10 - 10 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
ULEIE : update link transfer error interrupt enable
bits : 11 - 11 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
USEIE : user setting error interrupt enable
bits : 12 - 12 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
SUSPIE : completed suspension interrupt enable
bits : 13 - 13 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
TOIE : trigger overrun interrupt enable
bits : 14 - 14 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
LSM : Link step mode First the (possible 1D/repeated) block transfer is executed as defined by the current internal register file until GPDMA_CxBR1.BNDT[15:0] = 0 and GPDMA_CxBR1.BRC[10:0] = 0 if present. Secondly the next linked-list data structure is conditionally uploaded from memory as defined by GPDMA_CxLLR. Then channel execution is completed. Note: This bit must be written when EN=0. This bit is read-only when EN=1.
bits : 16 - 16 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
channel executed for the full linked-list and completed at the end of the last LLI (GPDMA_CxLLR = 0). The 16 low-significant bits of the link address are null (LA[15:0] = 0) and all the update bits are null (UT1 =UB1 = UT2 = USA = UDA = ULL = 0 and UT3 = UB2 = 0 if present). Then GPDMA_CxBR1.BNDT[15:0] = 0 and GPDMA_CxBR1.BRC[10:0] = 0 if present.
0x1 : B_0x1
channel executed once for the current LLI
End of enumeration elements list.
LAP : linked-list allocated port This bit is used to allocate the master port for the update of the GPDMA linked-list registers from the memory. Note: This bit must be written when EN=0. This bit is read-only when EN=1.
bits : 17 - 17 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
PRIO : priority level of the channel x GPDMA transfer versus others Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 22 - 23 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
low priority, low weight
0x1 : B_0x1
low priority, mid weight
0x2 : B_0x2
low priority, high weight
0x3 : B_0x3
high priority
End of enumeration elements list.
GPDMA channel 12 transfer register 1
address_offset : 0x690 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SDW_LOG2 : binary logarithm of the source data width of a burst in bytes Note: Setting a 8-byte data width causes a user setting error to be reported and no transfer is issued. A source block size must be a multiple of the source data width (GPDMA_CxBR1.BNDT[2:0] versus SDW_LOG2[1:0]). Otherwise, a user setting error is reported and no transfer is issued. A source single transfer must have an aligned address with its data width (start address GPDMA_CxSAR[2:0] versus SDW_LOG2[1:0]). Otherwise, a user setting error is reported and none transfer is issued.
bits : 0 - 1 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
byte
0x1 : B_0x1
half-word (2 bytes)
0x2 : B_0x2
word (4 bytes)
0x3 : B_0x3
user setting error reported and no transfer issued
End of enumeration elements list.
SINC : source incrementing burst The source address, pointed by GPDMA_CxSAR, is kept constant after a burst beat/single transfer or is incremented by the offset value corresponding to a contiguous data after a burst beat/single transfer.
bits : 3 - 3 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
fixed burst
0x1 : B_0x1
contiguously incremented burst
End of enumeration elements list.
SBL_1 : source burst length minus 1, between 0 and 63 The burst length unit is one data named beat within a burst. If SBL_1[5:0] =0 , the burst can be named as single. Each data/beat has a width defined by the destination data width SDW_LOG2[1:0]. Note: If a burst transfer crossed a 1-Kbyte address boundary on a AHB transfer, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the AHB protocol. If a burst transfer is of length greater than the FIFO size of the channel x, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the FIFO size. Transfer performance is lower, with GPDMA re-arbitration between effective and lower bursts/singles, but the data integrity is guaranteed.
bits : 4 - 9 (6 bit)
access : read-write
PAM : padding/alignment mode If DDW_LOG2[1:0] = SDW_LOG2[1:0]: if the data width of a burst destination transfer is equal to the data width of a burst source transfer, these bits are ignored. Else: - Case 1: If destination data width > source data width 1x: successive source data are FIFO queued and packed at the destination data width, in a left (LSB) to right (MSB) order (named little endian), before a destination transfer - Case 2: If destination data width < source data width 1x: source data is FIFO queued and unpacked at the destination data width, to be transferred in a left (LSB) to right (MSB) order (named little endian) to the destination Note:
bits : 11 - 12 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
source data is transferred as right aligned, left-truncated down to the destination data width
0x1 : B_0x1
source data is transferred as left-aligned, right-truncated down to the destination data width
0x0 : B_0x0
source data is transferred as right aligned, left-truncated down to the destination data width
0x1 : B_0x1
source data is transferred as left-aligned, right-truncated down to the destination data width
End of enumeration elements list.
SBX : source byte exchange within the unaligned half-word of each source word If the source data width is shorter than a word, this bit is ignored. If the source data width is a word:
bits : 13 - 13 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no byte-based exchange within the unaligned half-word of each source word
0x1 : B_0x1
the two consecutive bytes within the unaligned half-word of each source word are exchanged.
End of enumeration elements list.
SAP : source allocated port This bit is used to allocate the master port for the source transfer Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 14 - 14 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
SSEC : security attribute of the GPDMA transfer from the source If GPDMA_SECCFGR.SECx = 1 and the access is secure: This is a secure register bit. This bit can only be read by a secure software. This bit must be written by a secure software when GPDMA_SECCFGR.SECx =1 . A secure write is ignored when GPDMA_SECCFGR.SECx = 0. When GPDMA_SECCFGR.SECx is de-asserted, this SSEC bit is also de-asserted by hardware (on a secure reconfiguration of the channel as non-secure), and the GPDMA transfer from the source is non-secure.
bits : 15 - 15 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
GPDMA transfer non-secure
0x1 : B_0x1
GPDMA transfer secure
End of enumeration elements list.
DDW_LOG2 : binary logarithm of the destination data width of a burst, in bytes Note: Setting a 8-byte data width causes a user setting error to be reported and none transfer is issued. A destination burst transfer must have an aligned address with its data width (start address GPDMA_CxDAR[2:0] and address offset GPDMA_CxTR3.DAO[2:0], versus DDW_LOG2[1:0]). Otherwise a user setting error is reported and no transfer is issued.
bits : 16 - 17 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
byte
0x1 : B_0x1
half-word (2 bytes)
0x2 : B_0x2
word (4 bytes)
0x3 : B_0x3
user setting error reported and no transfer issued
End of enumeration elements list.
DINC : destination incrementing burst The destination address, pointed by GPDMA_CxDAR, is kept constant after a burst beat/single transfer, or is incremented by the offset value corresponding to a contiguous data after a burst beat/single transfer.
bits : 19 - 19 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
fixed burst
0x1 : B_0x1
contiguously incremented burst
End of enumeration elements list.
DBL_1 : destination burst length minus 1, between 0 and 63 The burst length unit is one data named beat within a burst. If DBL_1[5:0] =0 , the burst can be named as single. Each data/beat has a width defined by the destination data width DDW_LOG2[1:0]. Note: If a burst transfer crossed a 1-Kbyte address boundary on a AHB transfer, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the AHB protocol. If a burst transfer is of length greater than the FIFO size of the channel x, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the FIFO size. Transfer performance is lower, with GPDMA re-arbitration between effective and lower bursts/singles, but the data integrity is guaranteed.
bits : 20 - 25 (6 bit)
access : read-write
DBX : destination byte exchange If the destination data size is a byte, this bit is ignored. If the destination data size is not a byte:
bits : 26 - 26 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no byte-based exchange within half-word
0x1 : B_0x1
the two consecutive (post PAM) bytes are exchanged in each destination half-word.
End of enumeration elements list.
DHX : destination half-word exchange If the destination data size is shorter than a word, this bit is ignored. If the destination data size is a word:
bits : 27 - 27 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no halfword-based exchanged within word
0x1 : B_0x1
the two consecutive (post PAM) half-words are exchanged in each destination word.
End of enumeration elements list.
DAP : destination allocated port This bit is used to allocate the master port for the destination transfer Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
DSEC : security attribute of the GPDMA transfer to the destination If GPDMA_SECCFGR.SECx = 1 and the access is secure: This is a secure register bit. This bit can only be read by a secure software. This bit must be written by a secure software when GPDMA_SECCFGR.SECx = 1. A secure write is ignored when GPDMA_SECCFGR.SECx = 0. When GPDMA_SECCFGR.SECx is de-asserted, this DSEC bit is also de-asserted by hardware (on a secure reconfiguration of the channel as non-secure), and the GPDMA transfer to the destination is non-secure.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
GPDMA transfer non-secure
0x1 : B_0x1
GPDMA transfer secure
End of enumeration elements list.
GPDMA channel 12 transfer register 2
address_offset : 0x694 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
REQSEL : GPDMA hardware request selection These bits are ignored if channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer). Else, the selected hardware request is internally taken into account as per . The user must not assign a same input hardware request (same REQSEL[6:0] value) to different active GPDMA channels (GPDMA_CxCR.EN = 1 and GPDMA_CxTR2.SWREQ = 0 for these channels). GPDMA is not intended to hardware support the case of simultaneous enabled channels incorrectly configured with a same hardware peripheral request signal, and there is no user setting error reporting.
bits : 0 - 6 (7 bit)
access : read-write
SWREQ : software request This bit is internally taken into account when GPDMA_CxCR.EN is asserted.
bits : 9 - 9 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no software request. The selected hardware request REQSEL[6:0] is taken into account.
0x1 : B_0x1
software request for a memory-to-memory transfer. The default selected hardware request as per REQSEL[6:0] is ignored.
End of enumeration elements list.
DREQ : destination hardware request This bit is ignored if channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer). Else: Note:
bits : 10 - 10 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
selected hardware request driven by a source peripheral (request signal taken into account by the GPDMA transfer scheduler over the source/read port)
0x1 : B_0x1
selected hardware request driven by a destination peripheral (request signal taken into account by the GPDMA transfer scheduler over the destination/write port)
End of enumeration elements list.
BREQ : Block hardware request If the channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer), this bit is ignored. Else:
bits : 11 - 11 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
the selected hardware request is driven by a peripheral with a hardware request/acknowledge protocol at a burst level.
0x1 : B_0x1
the selected hardware request is driven by a peripheral with a hardware request/acknowledge protocol at a block level (see ).
End of enumeration elements list.
TRIGM : trigger mode These bits define the transfer granularity for its conditioning by the trigger. If the channel x is enabled (GPDMA_CxCR.EN asserted) with TRIGPOL[1:0] = 00 or 11, these TRIGM[1:0] bits are ignored. Else, a GPDMA transfer is conditioned by at least one trigger hit: first burst read of a 2D/repeated block transfer is conditioned by one hit trigger. – If the peripheral is programmed as a source (DREQ = 0) of the LLI data transfer, each programmed burst read is conditioned. – If the peripheral is programmed as a destination (DREQ = 1) of the LLI data transfer, each programmed burst write is conditioned. The first memory burst read of a (possibly 2D/repeated) block, also named as the first ready FIFO-based source burst, is gated by the occurrence of both the hardware request and the first trigger hit. The GPDMA monitoring of a trigger for channel x is started when the channel is enabled/loaded with a new active trigger configuration: rising or falling edge on a selected trigger (TRIGPOL[1:0] = 01 or respectively TRIGPOL[1:0] = 10). The monitoring of this trigger is kept active during the triggered and uncompleted (data or link) transfer and if a new trigger is detected then, this hit is internally memorized to grant the next transfer, as long as the defined rising or falling edge is not modified, and the TRIGSEL[5:0] is not modified, and the channel is enabled. Transferring a next LLIn+1 that updates the GPDMA_CxTR2 with a new value for any of TRIGSEL[5:0] or TRIGPOL[1:0], resets the monitoring, trashing the memorized hit of the formerly defined LLIn trigger. After a first new trigger hitn+1 is memorized, if another second trigger hitn+2 is detected and if the hitn triggered transfer is still not completed, hitn+2 is lost and not memorized.memorized. A trigger overrun flag is reported (GPDMA_CxSR.TOF =1 ), and an interrupt is generated if enabled (GPDMA_CxCR.TOIE = 1). The channel is not automatically disabled by hardware due to a trigger overrun. Note: When the source block size is not a multiple of the source burst size and is a multiple of the source data width, then the last programmed source burst is not completed and is internally shorten to match the block size. In this case, if TRIGM[1:0] = 11 and (SWREQ =1 or (SWREQ = 0 and DREQ =0 )), the shortened burst transfer (by singles or/and by bursts of lower length) is conditioned once by the trigger. When the programmed destination burst is internally shortened by singles or/and by bursts of lower length (versus FIFO size, versus block size, 1-Kbyte boundary address crossing): if the trigger is conditioning the programmed destination burst (if TRIGM[1:0] = 11 and SWREQ = 0 and DREQ = 1), this shortened destination burst transfer is conditioned once by the trigger.
bits : 14 - 15 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at block level: the first burst read of each block transfer is conditioned by one hit trigger (channel x = 12 to 15, for each block if a 2D/repeated block is configured with GPDMA_CxBR1.BRC[10:0] ≠ 0).
0x1 : B_0x1
channel x = 0 to 11, same as 00 channel x=12 to 15, at 2D/repeated block level, the
0x2 : B_0x2
at link level: a LLI link transfer is conditioned by one hit trigger. The LLI data transfer (if any) is not conditioned.
0x3 : B_0x3
at programmed burst level: If SWREQ = 1, each programmed burst read is conditioned by one hit trigger. If SWREQ = 0, each programmed burst that is requested by the selected peripheral, is conditioned by one hit trigger.
End of enumeration elements list.
TRIGSEL : trigger event input selection These bits select the trigger event input of the GPDMA transfer (as per ), with an active trigger event if TRIGPOL[1:0] ≠ 00.
bits : 16 - 21 (6 bit)
access : read-write
TRIGPOL : trigger event polarity These bits define the polarity of the selected trigger event input defined by TRIGSEL[5:0].
bits : 24 - 25 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no trigger (masked trigger event)
0x1 : B_0x1
trigger on the rising edge
0x2 : B_0x2
trigger on the falling edge
0x3 : B_0x3
same as 00
End of enumeration elements list.
TCEM : transfer complete event mode These bits define the transfer granularity for the transfer complete and half transfer complete events generation. Note: If the initial LLI0 data transfer is null/void (directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] = 0), then neither the complete transfer event nor the half transfer event is generated. Note: If the initial LLI0 data transfer is null/void (directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] = 0), then neither the complete transfer event nor the half transfer event is generated. Note: If the initial LLI0 data transfer is null/void (i.e. directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] =0 ), then the half transfer event is not generated, and the transfer complete event is generated when is completed the loading of the LLI1.
bits : 30 - 31 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at block level (when GPDMA_CxBR1.BNDT[15:0] = 0): the complete (and the half) transfer event is generated at the (respectively half of the) end of a block.
0x1 : B_0x1
channel x = 0 to 11, same as 00 channel x=12 to 15, at 2D/repeated block level (when GPDMA_CxBR1.BRC[10:0] = 0 and GPDMA_CxBR1.BNDT[15:0] = 0), the complete (and the half) transfer event is generated at the end (respectively half of the end) of the 2D/repeated block.
0x2 : B_0x2
at LLI level: the complete transfer event is generated at the end of the LLI transfer, including the update of the LLI if any. The half transfer event is generated at the half of the LLI data transfer (the LLI data transfer being a block transfer or a 2D/repeated block transfer for channel x = 12 to 15), if any data transfer.
0x3 : B_0x3
at channel level: the complete transfer event is generated at the end of the last LLI transfer. The half transfer event is generated at the half of the data transfer of the last LLI. The last LLI updates the link address GPDMA_CxLLR.LA[15:2] to zero and clears all the GPDMA_CxLLR update bits (UT1, UT2, UB1, USA, UDA and ULL, plus UT3 and UB2 if present). If the channel transfer is continuous/infinite, no event is generated.
End of enumeration elements list.
GPDMA channel 12 alternate block register 1
address_offset : 0x698 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
BNDT : block number of data bytes to transfer from the source Block size transferred from the source. When the channel is enabled, this field becomes read-only and is decremented, indicating the remaining number of data items in the current source block to be transferred. BNDT[15:0] is programmed in number of bytes, maximum source block size is 64 Kbytes -1. Once the last data transfer is completed (BNDT[15:0] = 0): - if GPDMA_CxLLR.UB1 = 1, this field is updated by the LLI in the memory. - if GPDMA_CxLLR.UB1 = 0 and if there is at least one not null Uxx update bit, this field is internally restored to the programmed value. - if all GPDMA_CxLLR.Uxx = 0 and if GPDMA_CxLLR.LA[15:0] ≠ 0, this field is internally restored to the programmed value (infinite/continuous last LLI). - if GPDMA_CxLLR = 0, this field is kept as zero following the last LLI data transfer. Note: A non-null source block size must be a multiple of the source data width (BNDT[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued. When configured in packing mode (GPDMA_CxTR1.PAM[1]=1 and destination data width different from source data width), a non-null source block size must be a multiple of the destination data width (BNDT[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued.
bits : 0 - 15 (16 bit)
access : read-write
BRC : Block repeat counter This field contains the number of repetitions of the current block (0 to 2047). When the channel is enabled, this field becomes read-only. After decrements, this field indicates the remaining number of blocks, excluding the current one. This counter is hardware decremented for each completed block transfer. Once the last block transfer is completed (BRC[10:0] = BNDT[15:0] = 0): If GPDMA_CxLLR.UB1 = 1, all GPDMA_CxBR1 fields are updated by the next LLI in the memory. If GPDMA_CxLLR.UB1 = 0 and if there is at least one not null Uxx update bit, this field is internally restored to the programmed value. if all GPDMA_CxLLR.Uxx = 0 and if GPDMA_CxLLR.LA[15:0] ≠ 0, this field is internally restored to the programmed value (infinite/continuous last LLI). if GPDMA_CxLLR = 0, this field is kept as zero following the last LLI and data transfer.
bits : 16 - 26 (11 bit)
access : read-write
SDEC : source address decrement
bits : 28 - 28 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
At the end of a programmed burst transfer from the source, the GPDMA_CxSAR register is updated by adding the programmed offset GPDMA_CxTR3.SAO to the current GPDMA_CxSAR value (current source address)
0x1 : B_0x1
At the end of a programmed burst transfer from the source, the GPDMA_CxSAR register is updated by subtracting the programmed offset GPDMA_CxTR3.SAO to the current GPDMA_CxSAR value (current source address)
End of enumeration elements list.
DDEC : destination address decrement
bits : 29 - 29 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
At the end of a programmed burst transfer to the destination, the GPDMA_CxDAR register is updated by adding the programmed offset GPDMA_CxTR3.DAO to the current GPDMA_CxDAR value (current destination address)
0x1 : B_0x1
At the end of a programmed burst transfer to the destination, the GPDMA_CxDAR register is updated by subtracting the programmed offset GPDMA_CxTR3.DAO to the current GPDMA_CxDAR value (current destination address)
End of enumeration elements list.
BRSDEC : Block repeat source address decrement Note: On top of this increment/decrement (depending on BRSDEC), GPDMA_CxSAR is in the same time also updated by the increment/decrement (depending on SDEC) of the GPDMA_CxTR3.SAO value, as it is done after any programmed burst transfer.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at the end of a block transfer, the GPDMA_CxSAR register is updated by adding the programmed offset GPDMA_CxBR2.BRSAO to the current GPDMA_CxSAR value (current source address)
0x1 : B_0x1
at the end of a block transfer, the GPDMA_CxSAR register is updated by subtracting the programmed offset GPDMA_CxBR2.BRSAO from the current GPDMA_CxSAR value (current source address)
End of enumeration elements list.
BRDDEC : Block repeat destination address decrement Note: On top of this increment/decrement (depending on BRDDEC), GPDMA_CxDAR is in the same time also updated by the increment/decrement (depending on DDEC) of the GPDMA_CxTR3.DAO value, as it is usually done at the end of each programmed burst transfer.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at the end of a block transfer, the GPDMA_CxDAR register is updated by adding the programmed offset GPDMA_CxBR2.BRDAO to the current GPDMA_CxDAR value (current destination address)
0x1 : B_0x1
at the end of a block transfer, the GPDMA_CxDAR register is updated by subtracting the programmed offset GPDMA_CxBR2.BRDAO from the current GPDMA_CxDAR value (current destination address)
End of enumeration elements list.
GPDMA channel 12 source address register
address_offset : 0x69C Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SA : source address This field is the pointer to the address from which the next data is read. During the channel activity, depending on the source addressing mode (GPDMA_CxTR1.SINC), this field is kept fixed or incremented by the data width (GPDMA_CxTR1.SDW_LOG2[1:0]) after each single source data, reflecting the next address from which data is read. During the channel activity, this address is updated after each completed source burst, consequently to: the programmed source burst either in fixed addressing mode or in contiguous-data incremented mode. If contiguously incremented (GPDMA_CxTR1.SINC = 1), then the additional address offset value is the programmed burst size, as defined by GPDMA_CxTR1.SBL_1[5:0] and GPDMA_CxTR1.SDW_LOG2[21:0] the additional source incremented/decremented offset value as programmed by GPDMA_CxBR1.SDEC and GPDMA_CxTR3.SAO[12:0] once/if completed source block transfer, for a channel x with 2D addressing capability (x = 12 to 15). additional block repeat source incremented/decremented offset value as programmed by GPDMA_CxBR1.BRSDEC and GPDMA_CxBR2.BRSAO[15:0] In linked-list mode, after a LLI data transfer is completed, this register is automatically updated by GPDMA from the memory, provided the LLI is set with GPDMA_CxLLR.USA = 1. Note: A source address must be aligned with the programmed data width of a source single (SA[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued. When the source block size is not a multiple of the source burst size and is a multiple of the source data width, the last programmed source burst is not completed and is internally shorten to match the block size. In this case, the additional GPDMA_CxTR3.SAO[12:0] is not applied.
bits : 0 - 31 (32 bit)
access : read-write
GPDMA channel 12 destination address register
address_offset : 0x6A0 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
DA : destination address This field is the pointer to the address from which the next data is written. During the channel activity, depending on the destination addressing mode (GPDMA_CxTR1.DINC), this field is kept fixed or incremented by the data width (GPDMA_CxTR1.DDW_LOG2[21:0]) after each single destination data, reflecting the next address from which data is written. During the channel activity, this address is updated after each completed destination burst, consequently to: the programmed destination burst either in fixed addressing mode or in contiguous-data incremented mode. If contiguously incremented (GPDMA_CxTR1.DINC = 1), then the additional address offset value is the programmed burst size, as defined by GPDMA_CxTR1.DBL_1[5:0] and GPDMA_CxTR1.DDW_LOG2[1:0] the additional destination incremented/decremented offset value as programmed by GPDMA_CxBR1.DDEC and GPDMA_CxTR3.DAO[12:0] once/if completed destination block transfer, for a channel x with 2D addressing capability (x = 12 to 15), the additional block repeat destination incremented/decremented offset value as programmed by GPDMA_CxBR1.BRDDEC and GPDMA_CxBR2.BRDAO[15:0] In linked-list mode, after a LLI data transfer is completed, this register is automatically updated by the GPDMA from the memory, provided the LLI is set with GPDMA_CxLLR.UDA = 1. Note: A destination address must be aligned with the programmed data width of a destination burst (DA[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued.
bits : 0 - 31 (32 bit)
access : read-write
GPDMA channel 12 transfer register 3
address_offset : 0x6A4 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SAO : source address offset increment The source address, pointed by GPDMA_CxSAR, is incremented or decremented (depending on GPDMA_CxBR1.SDEC) by this offset SAO[12:0] for each programmed source burst. This offset is not including and is added to the programmed burst size when the completed burst is addressed in incremented mode (GPDMA_CxTR1.SINC = 1). Note: A source address offset must be aligned with the programmed data width of a source burst (SAO[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else a user setting error is reported and none transfer is issued. When the source block size is not a multiple of the destination burst size and is a multiple of the source data width, then the last programmed source burst is not completed and is internally shorten to match the block size. In this case, the additional GPDMA_CxTR3.SAO[12:0] is not applied.
bits : 0 - 12 (13 bit)
access : read-write
DAO : destination address offset increment The destination address, pointed by GPDMA_CxDAR, is incremented or decremented (depending on GPDMA_CxBR1.DDEC) by this offset DAO[12:0] for each programmed destination burst. This offset is not including and is added to the programmed burst size when the completed burst is addressed in incremented mode (GPDMA_CxTR1.DINC = 1). Note: A destination address offset must be aligned with the programmed data width of a destination burst (DAO[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued.
bits : 16 - 28 (13 bit)
access : read-write
GPDMA channel 12 block register 2
address_offset : 0x6A8 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
BRSAO : Block repeated source address offset For a channel with 2D addressing capability, this field is used to update (by addition or subtraction depending on GPDMA_CxBR1.BRSDEC) the current source address (GPDMA_CxSAR) at the end of a block transfer. Note: A block repeated source address offset must be aligned with the programmed data width of a source burst (BRSAO[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued.
bits : 0 - 15 (16 bit)
access : read-write
BRDAO : Block repeated destination address offset For a channel with 2D addressing capability, this field is used to update (by addition or subtraction depending on GPDMA_CxBR1.BRDDEC) the current destination address (GPDMA_CxDAR) at the end of a block transfer. Note: A block repeated destination address offset must be aligned with the programmed data width of a destination burst (BRDAO[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued.
bits : 16 - 31 (16 bit)
access : read-write
GPDMA channel 12 alternate linked-list address register
address_offset : 0x6CC Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
LA : pointer (16-bit low-significant address) to the next linked-list data structure If UT1 = UT2 = UB1 = USA = UDA = ULL = 0 and if LA[15:20] = 0, the current LLI is the last one. The channel transfer is completed without any update of the linked-list GPDMA register file. Else, this field is the pointer to the memory address offset from which the next linked-list data structure is automatically fetched from, once the data transfer is completed, in order to conditionally update the linked-list GPDMA internal register file (GPDMA_CxCTR1, GPDMA_CxTR2, GPDMA_CxBR1, GPDMA_CxSAR, GPDMA_CxDAR and GPDMA_CxLLR). Note: The user must program the pointer to be 32-bit aligned. The two low-significant bits are write ignored.
bits : 2 - 15 (14 bit)
access : read-write
ULL : Update GPDMA_CxLLR register from memory This bit is used to control the update of GPDMA_CxLLR from the memory during the link transfer.
bits : 16 - 16 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxLLR update
0x1 : B_0x1
GPDMA_CxLLR update
End of enumeration elements list.
UB2 : Update GPDMA_CxBR2 from memory This bit controls the update of GPDMA_CxBR2 from the memory during the link transfer.
bits : 25 - 25 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxBR2 update
0x1 : B_0x1
GPDMA_CxBR2 update
End of enumeration elements list.
UT3 : Update GPDMA_CxTR3 from memory This bit controls the update of GPDMA_CxTR3 from the memory during the link transfer.
bits : 26 - 26 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR3 update
0x1 : B_0x1
GPDMA_CxTR3 update
End of enumeration elements list.
UDA : Update GPDMA_CxDAR register from memory This bit is used to control the update of GPDMA_CxDAR from the memory during the link transfer.
bits : 27 - 27 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxDAR update
0x1 : B_0x1
GPDMA_CxDAR update
End of enumeration elements list.
USA : update GPDMA_CxSAR from memory This bit controls the update of GPDMA_CxSAR from the memory during the link transfer.
bits : 28 - 28 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxSAR update
0x1 : B_0x1
GPDMA_CxSAR update
End of enumeration elements list.
UB1 : Update GPDMA_CxBR1 from memory This bit controls the update of GPDMA_CxBR1 from the memory during the link transfer. If UB1 = 0 and if GPDMA_CxLLR ≠ 0, the linked-list is not completed. GPDMA_CxBR1.BNDT[15:0] is then restored to the programmed value after data transfer is completed and before the link transfer.
bits : 29 - 29 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxBR1 update from memory (GPDMA_CxBR1.BNDT[15:0] restored if any link transfer)
0x1 : B_0x1
GPDMA_CxBR1 update
End of enumeration elements list.
UT2 : Update GPDMA_CxTR2 from memory This bit controls the update of GPDMA_CxTR2 from the memory during the link transfer.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR2 update
0x1 : B_0x1
GPDMA_CxTR2 update
End of enumeration elements list.
UT1 : Update GPDMA_CxTR1 from memory This bit controls the update of GPDMA_CxTR1 from the memory during the link transfer.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR1 update
0x1 : B_0x1
GPDMA_CxTR1 update
End of enumeration elements list.
GPDMA channel 13 linked-list base address register
address_offset : 0x6D0 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
LBA : linked-list base address of GPDMA channel x
bits : 16 - 31 (16 bit)
access : read-write
GPDMA channel 13 flag clear register
address_offset : 0x6DC Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
TCF : transfer complete flag clear
bits : 8 - 8 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding TCF flag cleared
End of enumeration elements list.
HTF : half transfer flag clear
bits : 9 - 9 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding HTF flag cleared
End of enumeration elements list.
DTEF : data transfer error flag clear
bits : 10 - 10 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding DTEF flag cleared
End of enumeration elements list.
ULEF : update link transfer error flag clear
bits : 11 - 11 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding ULEF flag cleared
End of enumeration elements list.
USEF : user setting error flag clear
bits : 12 - 12 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding USEF flag cleared
End of enumeration elements list.
SUSPF : completed suspension flag clear
bits : 13 - 13 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding SUSPF flag cleared
End of enumeration elements list.
TOF : trigger overrun flag clear
bits : 14 - 14 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding TOF flag cleared
End of enumeration elements list.
GPDMA channel 13 status register
address_offset : 0x6E0 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
IDLEF : idle flag This idle flag is de-asserted by hardware when the channel is enabled (GPDMA_CxCR.EN = 1) with a valid channel configuration (no USEF to be immediately reported). This idle flag is asserted after hard reset or by hardware when the channel is back in idle state (in suspended or disabled state).
bits : 0 - 0 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
channel not in idle state
0x1 : B_0x1
channel in idle state
End of enumeration elements list.
TCF : transfer complete flag A transfer complete event is either a block transfer complete, a 2D/repeated block transfer complete, a LLI transfer complete including the upload of the next LLI if any, or the full linked-list completion, depending on the transfer complete event mode (GPDMA_CxTR2.TCEM[1:0]).
bits : 8 - 8 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no transfer complete event
0x1 : B_0x1
a transfer complete event occurred
End of enumeration elements list.
HTF : half transfer flag An half transfer event is either an half block transfer or an half 2D/repeated block transfer, depending on the transfer complete event mode (GPDMA_CxTR2.TCEM[1:0]). An half block transfer occurs when half of the bytes of the source block size (rounded up integer of GPDMA_CxBR1.BNDT[15:0]/2) has been transferred to the destination. An half 2D/repeated block transfer occurs when half of the repeated blocks (rounded up integer of (GPDMA_CxBR1.BRC[10:0]+1)/2)) has been transferred to the destination.
bits : 9 - 9 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no half transfer event
0x1 : B_0x1
an half transfer event occurred
End of enumeration elements list.
DTEF : data transfer error flag
bits : 10 - 10 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no data transfer error event
0x1 : B_0x1
a master bus error event occurred on a data transfer
End of enumeration elements list.
ULEF : update link transfer error flag
bits : 11 - 11 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no update link transfer error event
0x1 : B_0x1
a master bus error event occurred while updating a linked-list register from memory
End of enumeration elements list.
USEF : user setting error flag
bits : 12 - 12 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no user setting error event
0x1 : B_0x1
a user setting error event occurred
End of enumeration elements list.
SUSPF : completed suspension flag
bits : 13 - 13 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no completed suspension event
0x1 : B_0x1
a completed suspension event occurred
End of enumeration elements list.
TOF : trigger overrun flag
bits : 14 - 14 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no trigger overrun event
0x1 : B_0x1
a trigger overrun event occurred
End of enumeration elements list.
FIFOL : monitored FIFO level Number of available write beats in the FIFO, in units of the programmed destination data width (see GPDMA_CxTR1.DDW_LOG2[1:0], in units of bytes, half-words, or words). Note: After having suspended an active transfer, the user may need to read FIFOL[7:0], additionally to GPDMA_CxBR1.BDNT[15:0] and GPDMA_CxBR1.BRC[10:0], to know how many data have been transferred to the destination. Before reading, the user may wait for the transfer to be suspended (GPDMA_CxSR.SUSPF = 1).
bits : 16 - 23 (8 bit)
access : read-only
GPDMA channel 13 control register
address_offset : 0x6E4 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
EN : enable Writing 1 into the field RESET (bit 1) causes the hardware to de-assert this bit, whatever is written into this bit 0. Else: this bit is de-asserted by hardware when there is a transfer error (master bus error or user setting error) or when there is a channel transfer complete (channel ready to be configured, e.g. if LSM=1 at the end of a single execution of the LLI). Else, this bit can be asserted by software. Writing 0 into this EN bit is ignored.
bits : 0 - 0 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
write: ignored, read: channel disabled
0x1 : B_0x1
write: enable channel, read: channel enabled
End of enumeration elements list.
RESET : reset This bit is write only. Writing 0 has no impact. Writing 1 implies the reset of the following: the FIFO, the channel internal state, SUSP and EN bits (whatever is written receptively in bit 2 and bit 0). The reset is effective when the channel is in steady state, meaning one of the following: - active channel in suspended state (GPDMA_CxSR.SUSPF = 1 and GPDMA_CxSR.IDLEF = GPDMA_CxCR.EN = 1) - channel in disabled state (GPDMA_CxSR.IDLEF = 1 and GPDMA_CxCR.EN = 0). After writing a RESET, to continue using this channel, the user must explicitly reconfigure the channel including the hardware-modified configuration registers (GPDMA_CxBR1, GPDMA_CxSAR and GPDMA_CxDAR) before enabling again the channel (see the programming sequence in ).
bits : 1 - 1 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no channel reset
0x1 : B_0x1
channel reset
End of enumeration elements list.
SUSP : suspend Writing 1 into the field RESET (bit 1) causes the hardware to de-assert this bit, whatever is written into this bit 2. Else: Software must write 1 in order to suspend an active channel i.e. a channel with an on-going GPDMA transfer over its master ports. The software must write 0 in order to resume a suspended channel, following the programming sequence detailed in .
bits : 2 - 2 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
write: resume channel, read: channel not suspended
0x1 : B_0x1
write: suspend channel, read: channel suspended.
End of enumeration elements list.
TCIE : transfer complete interrupt enable
bits : 8 - 8 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
HTIE : half transfer complete interrupt enable
bits : 9 - 9 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
DTEIE : data transfer error interrupt enable
bits : 10 - 10 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
ULEIE : update link transfer error interrupt enable
bits : 11 - 11 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
USEIE : user setting error interrupt enable
bits : 12 - 12 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
SUSPIE : completed suspension interrupt enable
bits : 13 - 13 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
TOIE : trigger overrun interrupt enable
bits : 14 - 14 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
LSM : Link step mode First the (possible 1D/repeated) block transfer is executed as defined by the current internal register file until GPDMA_CxBR1.BNDT[15:0] = 0 and GPDMA_CxBR1.BRC[10:0] = 0 if present. Secondly the next linked-list data structure is conditionally uploaded from memory as defined by GPDMA_CxLLR. Then channel execution is completed. Note: This bit must be written when EN=0. This bit is read-only when EN=1.
bits : 16 - 16 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
channel executed for the full linked-list and completed at the end of the last LLI (GPDMA_CxLLR = 0). The 16 low-significant bits of the link address are null (LA[15:0] = 0) and all the update bits are null (UT1 =UB1 = UT2 = USA = UDA = ULL = 0 and UT3 = UB2 = 0 if present). Then GPDMA_CxBR1.BNDT[15:0] = 0 and GPDMA_CxBR1.BRC[10:0] = 0 if present.
0x1 : B_0x1
channel executed once for the current LLI
End of enumeration elements list.
LAP : linked-list allocated port This bit is used to allocate the master port for the update of the GPDMA linked-list registers from the memory. Note: This bit must be written when EN=0. This bit is read-only when EN=1.
bits : 17 - 17 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
PRIO : priority level of the channel x GPDMA transfer versus others Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 22 - 23 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
low priority, low weight
0x1 : B_0x1
low priority, mid weight
0x2 : B_0x2
low priority, high weight
0x3 : B_0x3
high priority
End of enumeration elements list.
GPDMA channel 13 transfer register 1
address_offset : 0x710 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SDW_LOG2 : binary logarithm of the source data width of a burst in bytes Note: Setting a 8-byte data width causes a user setting error to be reported and no transfer is issued. A source block size must be a multiple of the source data width (GPDMA_CxBR1.BNDT[2:0] versus SDW_LOG2[1:0]). Otherwise, a user setting error is reported and no transfer is issued. A source single transfer must have an aligned address with its data width (start address GPDMA_CxSAR[2:0] versus SDW_LOG2[1:0]). Otherwise, a user setting error is reported and none transfer is issued.
bits : 0 - 1 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
byte
0x1 : B_0x1
half-word (2 bytes)
0x2 : B_0x2
word (4 bytes)
0x3 : B_0x3
user setting error reported and no transfer issued
End of enumeration elements list.
SINC : source incrementing burst The source address, pointed by GPDMA_CxSAR, is kept constant after a burst beat/single transfer or is incremented by the offset value corresponding to a contiguous data after a burst beat/single transfer.
bits : 3 - 3 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
fixed burst
0x1 : B_0x1
contiguously incremented burst
End of enumeration elements list.
SBL_1 : source burst length minus 1, between 0 and 63 The burst length unit is one data named beat within a burst. If SBL_1[5:0] =0 , the burst can be named as single. Each data/beat has a width defined by the destination data width SDW_LOG2[1:0]. Note: If a burst transfer crossed a 1-Kbyte address boundary on a AHB transfer, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the AHB protocol. If a burst transfer is of length greater than the FIFO size of the channel x, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the FIFO size. Transfer performance is lower, with GPDMA re-arbitration between effective and lower bursts/singles, but the data integrity is guaranteed.
bits : 4 - 9 (6 bit)
access : read-write
PAM : padding/alignment mode If DDW_LOG2[1:0] = SDW_LOG2[1:0]: if the data width of a burst destination transfer is equal to the data width of a burst source transfer, these bits are ignored. Else: - Case 1: If destination data width > source data width 1x: successive source data are FIFO queued and packed at the destination data width, in a left (LSB) to right (MSB) order (named little endian), before a destination transfer - Case 2: If destination data width < source data width 1x: source data is FIFO queued and unpacked at the destination data width, to be transferred in a left (LSB) to right (MSB) order (named little endian) to the destination Note:
bits : 11 - 12 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
source data is transferred as right aligned, left-truncated down to the destination data width
0x1 : B_0x1
source data is transferred as left-aligned, right-truncated down to the destination data width
0x0 : B_0x0
source data is transferred as right aligned, left-truncated down to the destination data width
0x1 : B_0x1
source data is transferred as left-aligned, right-truncated down to the destination data width
End of enumeration elements list.
SBX : source byte exchange within the unaligned half-word of each source word If the source data width is shorter than a word, this bit is ignored. If the source data width is a word:
bits : 13 - 13 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no byte-based exchange within the unaligned half-word of each source word
0x1 : B_0x1
the two consecutive bytes within the unaligned half-word of each source word are exchanged.
End of enumeration elements list.
SAP : source allocated port This bit is used to allocate the master port for the source transfer Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 14 - 14 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
SSEC : security attribute of the GPDMA transfer from the source If GPDMA_SECCFGR.SECx = 1 and the access is secure: This is a secure register bit. This bit can only be read by a secure software. This bit must be written by a secure software when GPDMA_SECCFGR.SECx =1 . A secure write is ignored when GPDMA_SECCFGR.SECx = 0. When GPDMA_SECCFGR.SECx is de-asserted, this SSEC bit is also de-asserted by hardware (on a secure reconfiguration of the channel as non-secure), and the GPDMA transfer from the source is non-secure.
bits : 15 - 15 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
GPDMA transfer non-secure
0x1 : B_0x1
GPDMA transfer secure
End of enumeration elements list.
DDW_LOG2 : binary logarithm of the destination data width of a burst, in bytes Note: Setting a 8-byte data width causes a user setting error to be reported and none transfer is issued. A destination burst transfer must have an aligned address with its data width (start address GPDMA_CxDAR[2:0] and address offset GPDMA_CxTR3.DAO[2:0], versus DDW_LOG2[1:0]). Otherwise a user setting error is reported and no transfer is issued.
bits : 16 - 17 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
byte
0x1 : B_0x1
half-word (2 bytes)
0x2 : B_0x2
word (4 bytes)
0x3 : B_0x3
user setting error reported and no transfer issued
End of enumeration elements list.
DINC : destination incrementing burst The destination address, pointed by GPDMA_CxDAR, is kept constant after a burst beat/single transfer, or is incremented by the offset value corresponding to a contiguous data after a burst beat/single transfer.
bits : 19 - 19 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
fixed burst
0x1 : B_0x1
contiguously incremented burst
End of enumeration elements list.
DBL_1 : destination burst length minus 1, between 0 and 63 The burst length unit is one data named beat within a burst. If DBL_1[5:0] =0 , the burst can be named as single. Each data/beat has a width defined by the destination data width DDW_LOG2[1:0]. Note: If a burst transfer crossed a 1-Kbyte address boundary on a AHB transfer, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the AHB protocol. If a burst transfer is of length greater than the FIFO size of the channel x, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the FIFO size. Transfer performance is lower, with GPDMA re-arbitration between effective and lower bursts/singles, but the data integrity is guaranteed.
bits : 20 - 25 (6 bit)
access : read-write
DBX : destination byte exchange If the destination data size is a byte, this bit is ignored. If the destination data size is not a byte:
bits : 26 - 26 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no byte-based exchange within half-word
0x1 : B_0x1
the two consecutive (post PAM) bytes are exchanged in each destination half-word.
End of enumeration elements list.
DHX : destination half-word exchange If the destination data size is shorter than a word, this bit is ignored. If the destination data size is a word:
bits : 27 - 27 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no halfword-based exchanged within word
0x1 : B_0x1
the two consecutive (post PAM) half-words are exchanged in each destination word.
End of enumeration elements list.
DAP : destination allocated port This bit is used to allocate the master port for the destination transfer Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
DSEC : security attribute of the GPDMA transfer to the destination If GPDMA_SECCFGR.SECx = 1 and the access is secure: This is a secure register bit. This bit can only be read by a secure software. This bit must be written by a secure software when GPDMA_SECCFGR.SECx = 1. A secure write is ignored when GPDMA_SECCFGR.SECx = 0. When GPDMA_SECCFGR.SECx is de-asserted, this DSEC bit is also de-asserted by hardware (on a secure reconfiguration of the channel as non-secure), and the GPDMA transfer to the destination is non-secure.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
GPDMA transfer non-secure
0x1 : B_0x1
GPDMA transfer secure
End of enumeration elements list.
GPDMA channel 13 transfer register 2
address_offset : 0x714 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
REQSEL : GPDMA hardware request selection These bits are ignored if channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer). Else, the selected hardware request is internally taken into account as per . The user must not assign a same input hardware request (same REQSEL[6:0] value) to different active GPDMA channels (GPDMA_CxCR.EN = 1 and GPDMA_CxTR2.SWREQ = 0 for these channels). GPDMA is not intended to hardware support the case of simultaneous enabled channels incorrectly configured with a same hardware peripheral request signal, and there is no user setting error reporting.
bits : 0 - 6 (7 bit)
access : read-write
SWREQ : software request This bit is internally taken into account when GPDMA_CxCR.EN is asserted.
bits : 9 - 9 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no software request. The selected hardware request REQSEL[6:0] is taken into account.
0x1 : B_0x1
software request for a memory-to-memory transfer. The default selected hardware request as per REQSEL[6:0] is ignored.
End of enumeration elements list.
DREQ : destination hardware request This bit is ignored if channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer). Else: Note:
bits : 10 - 10 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
selected hardware request driven by a source peripheral (request signal taken into account by the GPDMA transfer scheduler over the source/read port)
0x1 : B_0x1
selected hardware request driven by a destination peripheral (request signal taken into account by the GPDMA transfer scheduler over the destination/write port)
End of enumeration elements list.
BREQ : Block hardware request If the channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer), this bit is ignored. Else:
bits : 11 - 11 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
the selected hardware request is driven by a peripheral with a hardware request/acknowledge protocol at a burst level.
0x1 : B_0x1
the selected hardware request is driven by a peripheral with a hardware request/acknowledge protocol at a block level (see ).
End of enumeration elements list.
TRIGM : trigger mode These bits define the transfer granularity for its conditioning by the trigger. If the channel x is enabled (GPDMA_CxCR.EN asserted) with TRIGPOL[1:0] = 00 or 11, these TRIGM[1:0] bits are ignored. Else, a GPDMA transfer is conditioned by at least one trigger hit: first burst read of a 2D/repeated block transfer is conditioned by one hit trigger. – If the peripheral is programmed as a source (DREQ = 0) of the LLI data transfer, each programmed burst read is conditioned. – If the peripheral is programmed as a destination (DREQ = 1) of the LLI data transfer, each programmed burst write is conditioned. The first memory burst read of a (possibly 2D/repeated) block, also named as the first ready FIFO-based source burst, is gated by the occurrence of both the hardware request and the first trigger hit. The GPDMA monitoring of a trigger for channel x is started when the channel is enabled/loaded with a new active trigger configuration: rising or falling edge on a selected trigger (TRIGPOL[1:0] = 01 or respectively TRIGPOL[1:0] = 10). The monitoring of this trigger is kept active during the triggered and uncompleted (data or link) transfer and if a new trigger is detected then, this hit is internally memorized to grant the next transfer, as long as the defined rising or falling edge is not modified, and the TRIGSEL[5:0] is not modified, and the channel is enabled. Transferring a next LLIn+1 that updates the GPDMA_CxTR2 with a new value for any of TRIGSEL[5:0] or TRIGPOL[1:0], resets the monitoring, trashing the memorized hit of the formerly defined LLIn trigger. After a first new trigger hitn+1 is memorized, if another second trigger hitn+2 is detected and if the hitn triggered transfer is still not completed, hitn+2 is lost and not memorized.memorized. A trigger overrun flag is reported (GPDMA_CxSR.TOF =1 ), and an interrupt is generated if enabled (GPDMA_CxCR.TOIE = 1). The channel is not automatically disabled by hardware due to a trigger overrun. Note: When the source block size is not a multiple of the source burst size and is a multiple of the source data width, then the last programmed source burst is not completed and is internally shorten to match the block size. In this case, if TRIGM[1:0] = 11 and (SWREQ =1 or (SWREQ = 0 and DREQ =0 )), the shortened burst transfer (by singles or/and by bursts of lower length) is conditioned once by the trigger. When the programmed destination burst is internally shortened by singles or/and by bursts of lower length (versus FIFO size, versus block size, 1-Kbyte boundary address crossing): if the trigger is conditioning the programmed destination burst (if TRIGM[1:0] = 11 and SWREQ = 0 and DREQ = 1), this shortened destination burst transfer is conditioned once by the trigger.
bits : 14 - 15 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at block level: the first burst read of each block transfer is conditioned by one hit trigger (channel x = 12 to 15, for each block if a 2D/repeated block is configured with GPDMA_CxBR1.BRC[10:0] ≠ 0).
0x1 : B_0x1
channel x = 0 to 11, same as 00 channel x=12 to 15, at 2D/repeated block level, the
0x2 : B_0x2
at link level: a LLI link transfer is conditioned by one hit trigger. The LLI data transfer (if any) is not conditioned.
0x3 : B_0x3
at programmed burst level: If SWREQ = 1, each programmed burst read is conditioned by one hit trigger. If SWREQ = 0, each programmed burst that is requested by the selected peripheral, is conditioned by one hit trigger.
End of enumeration elements list.
TRIGSEL : trigger event input selection These bits select the trigger event input of the GPDMA transfer (as per ), with an active trigger event if TRIGPOL[1:0] ≠ 00.
bits : 16 - 21 (6 bit)
access : read-write
TRIGPOL : trigger event polarity These bits define the polarity of the selected trigger event input defined by TRIGSEL[5:0].
bits : 24 - 25 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no trigger (masked trigger event)
0x1 : B_0x1
trigger on the rising edge
0x2 : B_0x2
trigger on the falling edge
0x3 : B_0x3
same as 00
End of enumeration elements list.
TCEM : transfer complete event mode These bits define the transfer granularity for the transfer complete and half transfer complete events generation. Note: If the initial LLI0 data transfer is null/void (directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] = 0), then neither the complete transfer event nor the half transfer event is generated. Note: If the initial LLI0 data transfer is null/void (directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] = 0), then neither the complete transfer event nor the half transfer event is generated. Note: If the initial LLI0 data transfer is null/void (i.e. directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] =0 ), then the half transfer event is not generated, and the transfer complete event is generated when is completed the loading of the LLI1.
bits : 30 - 31 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at block level (when GPDMA_CxBR1.BNDT[15:0] = 0): the complete (and the half) transfer event is generated at the (respectively half of the) end of a block.
0x1 : B_0x1
channel x = 0 to 11, same as 00 channel x=12 to 15, at 2D/repeated block level (when GPDMA_CxBR1.BRC[10:0] = 0 and GPDMA_CxBR1.BNDT[15:0] = 0), the complete (and the half) transfer event is generated at the end (respectively half of the end) of the 2D/repeated block.
0x2 : B_0x2
at LLI level: the complete transfer event is generated at the end of the LLI transfer, including the update of the LLI if any. The half transfer event is generated at the half of the LLI data transfer (the LLI data transfer being a block transfer or a 2D/repeated block transfer for channel x = 12 to 15), if any data transfer.
0x3 : B_0x3
at channel level: the complete transfer event is generated at the end of the last LLI transfer. The half transfer event is generated at the half of the data transfer of the last LLI. The last LLI updates the link address GPDMA_CxLLR.LA[15:2] to zero and clears all the GPDMA_CxLLR update bits (UT1, UT2, UB1, USA, UDA and ULL, plus UT3 and UB2 if present). If the channel transfer is continuous/infinite, no event is generated.
End of enumeration elements list.
GPDMA channel 13 alternate block register 1
address_offset : 0x718 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
BNDT : block number of data bytes to transfer from the source Block size transferred from the source. When the channel is enabled, this field becomes read-only and is decremented, indicating the remaining number of data items in the current source block to be transferred. BNDT[15:0] is programmed in number of bytes, maximum source block size is 64 Kbytes -1. Once the last data transfer is completed (BNDT[15:0] = 0): - if GPDMA_CxLLR.UB1 = 1, this field is updated by the LLI in the memory. - if GPDMA_CxLLR.UB1 = 0 and if there is at least one not null Uxx update bit, this field is internally restored to the programmed value. - if all GPDMA_CxLLR.Uxx = 0 and if GPDMA_CxLLR.LA[15:0] ≠ 0, this field is internally restored to the programmed value (infinite/continuous last LLI). - if GPDMA_CxLLR = 0, this field is kept as zero following the last LLI data transfer. Note: A non-null source block size must be a multiple of the source data width (BNDT[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued. When configured in packing mode (GPDMA_CxTR1.PAM[1]=1 and destination data width different from source data width), a non-null source block size must be a multiple of the destination data width (BNDT[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued.
bits : 0 - 15 (16 bit)
access : read-write
BRC : Block repeat counter This field contains the number of repetitions of the current block (0 to 2047). When the channel is enabled, this field becomes read-only. After decrements, this field indicates the remaining number of blocks, excluding the current one. This counter is hardware decremented for each completed block transfer. Once the last block transfer is completed (BRC[10:0] = BNDT[15:0] = 0): If GPDMA_CxLLR.UB1 = 1, all GPDMA_CxBR1 fields are updated by the next LLI in the memory. If GPDMA_CxLLR.UB1 = 0 and if there is at least one not null Uxx update bit, this field is internally restored to the programmed value. if all GPDMA_CxLLR.Uxx = 0 and if GPDMA_CxLLR.LA[15:0] ≠ 0, this field is internally restored to the programmed value (infinite/continuous last LLI). if GPDMA_CxLLR = 0, this field is kept as zero following the last LLI and data transfer.
bits : 16 - 26 (11 bit)
access : read-write
SDEC : source address decrement
bits : 28 - 28 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
At the end of a programmed burst transfer from the source, the GPDMA_CxSAR register is updated by adding the programmed offset GPDMA_CxTR3.SAO to the current GPDMA_CxSAR value (current source address)
0x1 : B_0x1
At the end of a programmed burst transfer from the source, the GPDMA_CxSAR register is updated by subtracting the programmed offset GPDMA_CxTR3.SAO to the current GPDMA_CxSAR value (current source address)
End of enumeration elements list.
DDEC : destination address decrement
bits : 29 - 29 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
At the end of a programmed burst transfer to the destination, the GPDMA_CxDAR register is updated by adding the programmed offset GPDMA_CxTR3.DAO to the current GPDMA_CxDAR value (current destination address)
0x1 : B_0x1
At the end of a programmed burst transfer to the destination, the GPDMA_CxDAR register is updated by subtracting the programmed offset GPDMA_CxTR3.DAO to the current GPDMA_CxDAR value (current destination address)
End of enumeration elements list.
BRSDEC : Block repeat source address decrement Note: On top of this increment/decrement (depending on BRSDEC), GPDMA_CxSAR is in the same time also updated by the increment/decrement (depending on SDEC) of the GPDMA_CxTR3.SAO value, as it is done after any programmed burst transfer.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at the end of a block transfer, the GPDMA_CxSAR register is updated by adding the programmed offset GPDMA_CxBR2.BRSAO to the current GPDMA_CxSAR value (current source address)
0x1 : B_0x1
at the end of a block transfer, the GPDMA_CxSAR register is updated by subtracting the programmed offset GPDMA_CxBR2.BRSAO from the current GPDMA_CxSAR value (current source address)
End of enumeration elements list.
BRDDEC : Block repeat destination address decrement Note: On top of this increment/decrement (depending on BRDDEC), GPDMA_CxDAR is in the same time also updated by the increment/decrement (depending on DDEC) of the GPDMA_CxTR3.DAO value, as it is usually done at the end of each programmed burst transfer.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at the end of a block transfer, the GPDMA_CxDAR register is updated by adding the programmed offset GPDMA_CxBR2.BRDAO to the current GPDMA_CxDAR value (current destination address)
0x1 : B_0x1
at the end of a block transfer, the GPDMA_CxDAR register is updated by subtracting the programmed offset GPDMA_CxBR2.BRDAO from the current GPDMA_CxDAR value (current destination address)
End of enumeration elements list.
GPDMA channel 13 source address register
address_offset : 0x71C Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SA : source address This field is the pointer to the address from which the next data is read. During the channel activity, depending on the source addressing mode (GPDMA_CxTR1.SINC), this field is kept fixed or incremented by the data width (GPDMA_CxTR1.SDW_LOG2[1:0]) after each single source data, reflecting the next address from which data is read. During the channel activity, this address is updated after each completed source burst, consequently to: the programmed source burst either in fixed addressing mode or in contiguous-data incremented mode. If contiguously incremented (GPDMA_CxTR1.SINC = 1), then the additional address offset value is the programmed burst size, as defined by GPDMA_CxTR1.SBL_1[5:0] and GPDMA_CxTR1.SDW_LOG2[21:0] the additional source incremented/decremented offset value as programmed by GPDMA_CxBR1.SDEC and GPDMA_CxTR3.SAO[12:0] once/if completed source block transfer, for a channel x with 2D addressing capability (x = 12 to 15). additional block repeat source incremented/decremented offset value as programmed by GPDMA_CxBR1.BRSDEC and GPDMA_CxBR2.BRSAO[15:0] In linked-list mode, after a LLI data transfer is completed, this register is automatically updated by GPDMA from the memory, provided the LLI is set with GPDMA_CxLLR.USA = 1. Note: A source address must be aligned with the programmed data width of a source single (SA[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued. When the source block size is not a multiple of the source burst size and is a multiple of the source data width, the last programmed source burst is not completed and is internally shorten to match the block size. In this case, the additional GPDMA_CxTR3.SAO[12:0] is not applied.
bits : 0 - 31 (32 bit)
access : read-write
GPDMA channel 13 destination address register
address_offset : 0x720 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
DA : destination address This field is the pointer to the address from which the next data is written. During the channel activity, depending on the destination addressing mode (GPDMA_CxTR1.DINC), this field is kept fixed or incremented by the data width (GPDMA_CxTR1.DDW_LOG2[21:0]) after each single destination data, reflecting the next address from which data is written. During the channel activity, this address is updated after each completed destination burst, consequently to: the programmed destination burst either in fixed addressing mode or in contiguous-data incremented mode. If contiguously incremented (GPDMA_CxTR1.DINC = 1), then the additional address offset value is the programmed burst size, as defined by GPDMA_CxTR1.DBL_1[5:0] and GPDMA_CxTR1.DDW_LOG2[1:0] the additional destination incremented/decremented offset value as programmed by GPDMA_CxBR1.DDEC and GPDMA_CxTR3.DAO[12:0] once/if completed destination block transfer, for a channel x with 2D addressing capability (x = 12 to 15), the additional block repeat destination incremented/decremented offset value as programmed by GPDMA_CxBR1.BRDDEC and GPDMA_CxBR2.BRDAO[15:0] In linked-list mode, after a LLI data transfer is completed, this register is automatically updated by the GPDMA from the memory, provided the LLI is set with GPDMA_CxLLR.UDA = 1. Note: A destination address must be aligned with the programmed data width of a destination burst (DA[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued.
bits : 0 - 31 (32 bit)
access : read-write
GPDMA channel 13 transfer register 3
address_offset : 0x724 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SAO : source address offset increment The source address, pointed by GPDMA_CxSAR, is incremented or decremented (depending on GPDMA_CxBR1.SDEC) by this offset SAO[12:0] for each programmed source burst. This offset is not including and is added to the programmed burst size when the completed burst is addressed in incremented mode (GPDMA_CxTR1.SINC = 1). Note: A source address offset must be aligned with the programmed data width of a source burst (SAO[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else a user setting error is reported and none transfer is issued. When the source block size is not a multiple of the destination burst size and is a multiple of the source data width, then the last programmed source burst is not completed and is internally shorten to match the block size. In this case, the additional GPDMA_CxTR3.SAO[12:0] is not applied.
bits : 0 - 12 (13 bit)
access : read-write
DAO : destination address offset increment The destination address, pointed by GPDMA_CxDAR, is incremented or decremented (depending on GPDMA_CxBR1.DDEC) by this offset DAO[12:0] for each programmed destination burst. This offset is not including and is added to the programmed burst size when the completed burst is addressed in incremented mode (GPDMA_CxTR1.DINC = 1). Note: A destination address offset must be aligned with the programmed data width of a destination burst (DAO[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued.
bits : 16 - 28 (13 bit)
access : read-write
GPDMA channel 13 block register 2
address_offset : 0x728 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
BRSAO : Block repeated source address offset For a channel with 2D addressing capability, this field is used to update (by addition or subtraction depending on GPDMA_CxBR1.BRSDEC) the current source address (GPDMA_CxSAR) at the end of a block transfer. Note: A block repeated source address offset must be aligned with the programmed data width of a source burst (BRSAO[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued.
bits : 0 - 15 (16 bit)
access : read-write
BRDAO : Block repeated destination address offset For a channel with 2D addressing capability, this field is used to update (by addition or subtraction depending on GPDMA_CxBR1.BRDDEC) the current destination address (GPDMA_CxDAR) at the end of a block transfer. Note: A block repeated destination address offset must be aligned with the programmed data width of a destination burst (BRDAO[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued.
bits : 16 - 31 (16 bit)
access : read-write
GPDMA channel 13 alternate linked-list address register
address_offset : 0x74C Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
LA : pointer (16-bit low-significant address) to the next linked-list data structure If UT1 = UT2 = UB1 = USA = UDA = ULL = 0 and if LA[15:20] = 0, the current LLI is the last one. The channel transfer is completed without any update of the linked-list GPDMA register file. Else, this field is the pointer to the memory address offset from which the next linked-list data structure is automatically fetched from, once the data transfer is completed, in order to conditionally update the linked-list GPDMA internal register file (GPDMA_CxCTR1, GPDMA_CxTR2, GPDMA_CxBR1, GPDMA_CxSAR, GPDMA_CxDAR and GPDMA_CxLLR). Note: The user must program the pointer to be 32-bit aligned. The two low-significant bits are write ignored.
bits : 2 - 15 (14 bit)
access : read-write
ULL : Update GPDMA_CxLLR register from memory This bit is used to control the update of GPDMA_CxLLR from the memory during the link transfer.
bits : 16 - 16 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxLLR update
0x1 : B_0x1
GPDMA_CxLLR update
End of enumeration elements list.
UB2 : Update GPDMA_CxBR2 from memory This bit controls the update of GPDMA_CxBR2 from the memory during the link transfer.
bits : 25 - 25 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxBR2 update
0x1 : B_0x1
GPDMA_CxBR2 update
End of enumeration elements list.
UT3 : Update GPDMA_CxTR3 from memory This bit controls the update of GPDMA_CxTR3 from the memory during the link transfer.
bits : 26 - 26 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR3 update
0x1 : B_0x1
GPDMA_CxTR3 update
End of enumeration elements list.
UDA : Update GPDMA_CxDAR register from memory This bit is used to control the update of GPDMA_CxDAR from the memory during the link transfer.
bits : 27 - 27 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxDAR update
0x1 : B_0x1
GPDMA_CxDAR update
End of enumeration elements list.
USA : update GPDMA_CxSAR from memory This bit controls the update of GPDMA_CxSAR from the memory during the link transfer.
bits : 28 - 28 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxSAR update
0x1 : B_0x1
GPDMA_CxSAR update
End of enumeration elements list.
UB1 : Update GPDMA_CxBR1 from memory This bit controls the update of GPDMA_CxBR1 from the memory during the link transfer. If UB1 = 0 and if GPDMA_CxLLR ≠ 0, the linked-list is not completed. GPDMA_CxBR1.BNDT[15:0] is then restored to the programmed value after data transfer is completed and before the link transfer.
bits : 29 - 29 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxBR1 update from memory (GPDMA_CxBR1.BNDT[15:0] restored if any link transfer)
0x1 : B_0x1
GPDMA_CxBR1 update
End of enumeration elements list.
UT2 : Update GPDMA_CxTR2 from memory This bit controls the update of GPDMA_CxTR2 from the memory during the link transfer.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR2 update
0x1 : B_0x1
GPDMA_CxTR2 update
End of enumeration elements list.
UT1 : Update GPDMA_CxTR1 from memory This bit controls the update of GPDMA_CxTR1 from the memory during the link transfer.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR1 update
0x1 : B_0x1
GPDMA_CxTR1 update
End of enumeration elements list.
GPDMA channel 14 linked-list base address register
address_offset : 0x750 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
LBA : linked-list base address of GPDMA channel x
bits : 16 - 31 (16 bit)
access : read-write
GPDMA channel 14 flag clear register
address_offset : 0x75C Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
TCF : transfer complete flag clear
bits : 8 - 8 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding TCF flag cleared
End of enumeration elements list.
HTF : half transfer flag clear
bits : 9 - 9 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding HTF flag cleared
End of enumeration elements list.
DTEF : data transfer error flag clear
bits : 10 - 10 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding DTEF flag cleared
End of enumeration elements list.
ULEF : update link transfer error flag clear
bits : 11 - 11 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding ULEF flag cleared
End of enumeration elements list.
USEF : user setting error flag clear
bits : 12 - 12 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding USEF flag cleared
End of enumeration elements list.
SUSPF : completed suspension flag clear
bits : 13 - 13 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding SUSPF flag cleared
End of enumeration elements list.
TOF : trigger overrun flag clear
bits : 14 - 14 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding TOF flag cleared
End of enumeration elements list.
GPDMA channel 14 status register
address_offset : 0x760 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
IDLEF : idle flag This idle flag is de-asserted by hardware when the channel is enabled (GPDMA_CxCR.EN = 1) with a valid channel configuration (no USEF to be immediately reported). This idle flag is asserted after hard reset or by hardware when the channel is back in idle state (in suspended or disabled state).
bits : 0 - 0 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
channel not in idle state
0x1 : B_0x1
channel in idle state
End of enumeration elements list.
TCF : transfer complete flag A transfer complete event is either a block transfer complete, a 2D/repeated block transfer complete, a LLI transfer complete including the upload of the next LLI if any, or the full linked-list completion, depending on the transfer complete event mode (GPDMA_CxTR2.TCEM[1:0]).
bits : 8 - 8 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no transfer complete event
0x1 : B_0x1
a transfer complete event occurred
End of enumeration elements list.
HTF : half transfer flag An half transfer event is either an half block transfer or an half 2D/repeated block transfer, depending on the transfer complete event mode (GPDMA_CxTR2.TCEM[1:0]). An half block transfer occurs when half of the bytes of the source block size (rounded up integer of GPDMA_CxBR1.BNDT[15:0]/2) has been transferred to the destination. An half 2D/repeated block transfer occurs when half of the repeated blocks (rounded up integer of (GPDMA_CxBR1.BRC[10:0]+1)/2)) has been transferred to the destination.
bits : 9 - 9 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no half transfer event
0x1 : B_0x1
an half transfer event occurred
End of enumeration elements list.
DTEF : data transfer error flag
bits : 10 - 10 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no data transfer error event
0x1 : B_0x1
a master bus error event occurred on a data transfer
End of enumeration elements list.
ULEF : update link transfer error flag
bits : 11 - 11 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no update link transfer error event
0x1 : B_0x1
a master bus error event occurred while updating a linked-list register from memory
End of enumeration elements list.
USEF : user setting error flag
bits : 12 - 12 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no user setting error event
0x1 : B_0x1
a user setting error event occurred
End of enumeration elements list.
SUSPF : completed suspension flag
bits : 13 - 13 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no completed suspension event
0x1 : B_0x1
a completed suspension event occurred
End of enumeration elements list.
TOF : trigger overrun flag
bits : 14 - 14 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no trigger overrun event
0x1 : B_0x1
a trigger overrun event occurred
End of enumeration elements list.
FIFOL : monitored FIFO level Number of available write beats in the FIFO, in units of the programmed destination data width (see GPDMA_CxTR1.DDW_LOG2[1:0], in units of bytes, half-words, or words). Note: After having suspended an active transfer, the user may need to read FIFOL[7:0], additionally to GPDMA_CxBR1.BDNT[15:0] and GPDMA_CxBR1.BRC[10:0], to know how many data have been transferred to the destination. Before reading, the user may wait for the transfer to be suspended (GPDMA_CxSR.SUSPF = 1).
bits : 16 - 23 (8 bit)
access : read-only
GPDMA channel 14 control register
address_offset : 0x764 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
EN : enable Writing 1 into the field RESET (bit 1) causes the hardware to de-assert this bit, whatever is written into this bit 0. Else: this bit is de-asserted by hardware when there is a transfer error (master bus error or user setting error) or when there is a channel transfer complete (channel ready to be configured, e.g. if LSM=1 at the end of a single execution of the LLI). Else, this bit can be asserted by software. Writing 0 into this EN bit is ignored.
bits : 0 - 0 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
write: ignored, read: channel disabled
0x1 : B_0x1
write: enable channel, read: channel enabled
End of enumeration elements list.
RESET : reset This bit is write only. Writing 0 has no impact. Writing 1 implies the reset of the following: the FIFO, the channel internal state, SUSP and EN bits (whatever is written receptively in bit 2 and bit 0). The reset is effective when the channel is in steady state, meaning one of the following: - active channel in suspended state (GPDMA_CxSR.SUSPF = 1 and GPDMA_CxSR.IDLEF = GPDMA_CxCR.EN = 1) - channel in disabled state (GPDMA_CxSR.IDLEF = 1 and GPDMA_CxCR.EN = 0). After writing a RESET, to continue using this channel, the user must explicitly reconfigure the channel including the hardware-modified configuration registers (GPDMA_CxBR1, GPDMA_CxSAR and GPDMA_CxDAR) before enabling again the channel (see the programming sequence in ).
bits : 1 - 1 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no channel reset
0x1 : B_0x1
channel reset
End of enumeration elements list.
SUSP : suspend Writing 1 into the field RESET (bit 1) causes the hardware to de-assert this bit, whatever is written into this bit 2. Else: Software must write 1 in order to suspend an active channel i.e. a channel with an on-going GPDMA transfer over its master ports. The software must write 0 in order to resume a suspended channel, following the programming sequence detailed in .
bits : 2 - 2 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
write: resume channel, read: channel not suspended
0x1 : B_0x1
write: suspend channel, read: channel suspended.
End of enumeration elements list.
TCIE : transfer complete interrupt enable
bits : 8 - 8 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
HTIE : half transfer complete interrupt enable
bits : 9 - 9 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
DTEIE : data transfer error interrupt enable
bits : 10 - 10 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
ULEIE : update link transfer error interrupt enable
bits : 11 - 11 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
USEIE : user setting error interrupt enable
bits : 12 - 12 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
SUSPIE : completed suspension interrupt enable
bits : 13 - 13 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
TOIE : trigger overrun interrupt enable
bits : 14 - 14 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
LSM : Link step mode First the (possible 1D/repeated) block transfer is executed as defined by the current internal register file until GPDMA_CxBR1.BNDT[15:0] = 0 and GPDMA_CxBR1.BRC[10:0] = 0 if present. Secondly the next linked-list data structure is conditionally uploaded from memory as defined by GPDMA_CxLLR. Then channel execution is completed. Note: This bit must be written when EN=0. This bit is read-only when EN=1.
bits : 16 - 16 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
channel executed for the full linked-list and completed at the end of the last LLI (GPDMA_CxLLR = 0). The 16 low-significant bits of the link address are null (LA[15:0] = 0) and all the update bits are null (UT1 =UB1 = UT2 = USA = UDA = ULL = 0 and UT3 = UB2 = 0 if present). Then GPDMA_CxBR1.BNDT[15:0] = 0 and GPDMA_CxBR1.BRC[10:0] = 0 if present.
0x1 : B_0x1
channel executed once for the current LLI
End of enumeration elements list.
LAP : linked-list allocated port This bit is used to allocate the master port for the update of the GPDMA linked-list registers from the memory. Note: This bit must be written when EN=0. This bit is read-only when EN=1.
bits : 17 - 17 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
PRIO : priority level of the channel x GPDMA transfer versus others Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 22 - 23 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
low priority, low weight
0x1 : B_0x1
low priority, mid weight
0x2 : B_0x2
low priority, high weight
0x3 : B_0x3
high priority
End of enumeration elements list.
GPDMA channel 14 transfer register 1
address_offset : 0x790 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SDW_LOG2 : binary logarithm of the source data width of a burst in bytes Note: Setting a 8-byte data width causes a user setting error to be reported and no transfer is issued. A source block size must be a multiple of the source data width (GPDMA_CxBR1.BNDT[2:0] versus SDW_LOG2[1:0]). Otherwise, a user setting error is reported and no transfer is issued. A source single transfer must have an aligned address with its data width (start address GPDMA_CxSAR[2:0] versus SDW_LOG2[1:0]). Otherwise, a user setting error is reported and none transfer is issued.
bits : 0 - 1 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
byte
0x1 : B_0x1
half-word (2 bytes)
0x2 : B_0x2
word (4 bytes)
0x3 : B_0x3
user setting error reported and no transfer issued
End of enumeration elements list.
SINC : source incrementing burst The source address, pointed by GPDMA_CxSAR, is kept constant after a burst beat/single transfer or is incremented by the offset value corresponding to a contiguous data after a burst beat/single transfer.
bits : 3 - 3 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
fixed burst
0x1 : B_0x1
contiguously incremented burst
End of enumeration elements list.
SBL_1 : source burst length minus 1, between 0 and 63 The burst length unit is one data named beat within a burst. If SBL_1[5:0] =0 , the burst can be named as single. Each data/beat has a width defined by the destination data width SDW_LOG2[1:0]. Note: If a burst transfer crossed a 1-Kbyte address boundary on a AHB transfer, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the AHB protocol. If a burst transfer is of length greater than the FIFO size of the channel x, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the FIFO size. Transfer performance is lower, with GPDMA re-arbitration between effective and lower bursts/singles, but the data integrity is guaranteed.
bits : 4 - 9 (6 bit)
access : read-write
PAM : padding/alignment mode If DDW_LOG2[1:0] = SDW_LOG2[1:0]: if the data width of a burst destination transfer is equal to the data width of a burst source transfer, these bits are ignored. Else: - Case 1: If destination data width > source data width 1x: successive source data are FIFO queued and packed at the destination data width, in a left (LSB) to right (MSB) order (named little endian), before a destination transfer - Case 2: If destination data width < source data width 1x: source data is FIFO queued and unpacked at the destination data width, to be transferred in a left (LSB) to right (MSB) order (named little endian) to the destination Note:
bits : 11 - 12 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
source data is transferred as right aligned, left-truncated down to the destination data width
0x1 : B_0x1
source data is transferred as left-aligned, right-truncated down to the destination data width
0x0 : B_0x0
source data is transferred as right aligned, left-truncated down to the destination data width
0x1 : B_0x1
source data is transferred as left-aligned, right-truncated down to the destination data width
End of enumeration elements list.
SBX : source byte exchange within the unaligned half-word of each source word If the source data width is shorter than a word, this bit is ignored. If the source data width is a word:
bits : 13 - 13 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no byte-based exchange within the unaligned half-word of each source word
0x1 : B_0x1
the two consecutive bytes within the unaligned half-word of each source word are exchanged.
End of enumeration elements list.
SAP : source allocated port This bit is used to allocate the master port for the source transfer Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 14 - 14 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
SSEC : security attribute of the GPDMA transfer from the source If GPDMA_SECCFGR.SECx = 1 and the access is secure: This is a secure register bit. This bit can only be read by a secure software. This bit must be written by a secure software when GPDMA_SECCFGR.SECx =1 . A secure write is ignored when GPDMA_SECCFGR.SECx = 0. When GPDMA_SECCFGR.SECx is de-asserted, this SSEC bit is also de-asserted by hardware (on a secure reconfiguration of the channel as non-secure), and the GPDMA transfer from the source is non-secure.
bits : 15 - 15 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
GPDMA transfer non-secure
0x1 : B_0x1
GPDMA transfer secure
End of enumeration elements list.
DDW_LOG2 : binary logarithm of the destination data width of a burst, in bytes Note: Setting a 8-byte data width causes a user setting error to be reported and none transfer is issued. A destination burst transfer must have an aligned address with its data width (start address GPDMA_CxDAR[2:0] and address offset GPDMA_CxTR3.DAO[2:0], versus DDW_LOG2[1:0]). Otherwise a user setting error is reported and no transfer is issued.
bits : 16 - 17 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
byte
0x1 : B_0x1
half-word (2 bytes)
0x2 : B_0x2
word (4 bytes)
0x3 : B_0x3
user setting error reported and no transfer issued
End of enumeration elements list.
DINC : destination incrementing burst The destination address, pointed by GPDMA_CxDAR, is kept constant after a burst beat/single transfer, or is incremented by the offset value corresponding to a contiguous data after a burst beat/single transfer.
bits : 19 - 19 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
fixed burst
0x1 : B_0x1
contiguously incremented burst
End of enumeration elements list.
DBL_1 : destination burst length minus 1, between 0 and 63 The burst length unit is one data named beat within a burst. If DBL_1[5:0] =0 , the burst can be named as single. Each data/beat has a width defined by the destination data width DDW_LOG2[1:0]. Note: If a burst transfer crossed a 1-Kbyte address boundary on a AHB transfer, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the AHB protocol. If a burst transfer is of length greater than the FIFO size of the channel x, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the FIFO size. Transfer performance is lower, with GPDMA re-arbitration between effective and lower bursts/singles, but the data integrity is guaranteed.
bits : 20 - 25 (6 bit)
access : read-write
DBX : destination byte exchange If the destination data size is a byte, this bit is ignored. If the destination data size is not a byte:
bits : 26 - 26 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no byte-based exchange within half-word
0x1 : B_0x1
the two consecutive (post PAM) bytes are exchanged in each destination half-word.
End of enumeration elements list.
DHX : destination half-word exchange If the destination data size is shorter than a word, this bit is ignored. If the destination data size is a word:
bits : 27 - 27 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no halfword-based exchanged within word
0x1 : B_0x1
the two consecutive (post PAM) half-words are exchanged in each destination word.
End of enumeration elements list.
DAP : destination allocated port This bit is used to allocate the master port for the destination transfer Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
DSEC : security attribute of the GPDMA transfer to the destination If GPDMA_SECCFGR.SECx = 1 and the access is secure: This is a secure register bit. This bit can only be read by a secure software. This bit must be written by a secure software when GPDMA_SECCFGR.SECx = 1. A secure write is ignored when GPDMA_SECCFGR.SECx = 0. When GPDMA_SECCFGR.SECx is de-asserted, this DSEC bit is also de-asserted by hardware (on a secure reconfiguration of the channel as non-secure), and the GPDMA transfer to the destination is non-secure.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
GPDMA transfer non-secure
0x1 : B_0x1
GPDMA transfer secure
End of enumeration elements list.
GPDMA channel 14 transfer register 2
address_offset : 0x794 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
REQSEL : GPDMA hardware request selection These bits are ignored if channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer). Else, the selected hardware request is internally taken into account as per . The user must not assign a same input hardware request (same REQSEL[6:0] value) to different active GPDMA channels (GPDMA_CxCR.EN = 1 and GPDMA_CxTR2.SWREQ = 0 for these channels). GPDMA is not intended to hardware support the case of simultaneous enabled channels incorrectly configured with a same hardware peripheral request signal, and there is no user setting error reporting.
bits : 0 - 6 (7 bit)
access : read-write
SWREQ : software request This bit is internally taken into account when GPDMA_CxCR.EN is asserted.
bits : 9 - 9 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no software request. The selected hardware request REQSEL[6:0] is taken into account.
0x1 : B_0x1
software request for a memory-to-memory transfer. The default selected hardware request as per REQSEL[6:0] is ignored.
End of enumeration elements list.
DREQ : destination hardware request This bit is ignored if channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer). Else: Note:
bits : 10 - 10 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
selected hardware request driven by a source peripheral (request signal taken into account by the GPDMA transfer scheduler over the source/read port)
0x1 : B_0x1
selected hardware request driven by a destination peripheral (request signal taken into account by the GPDMA transfer scheduler over the destination/write port)
End of enumeration elements list.
BREQ : Block hardware request If the channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer), this bit is ignored. Else:
bits : 11 - 11 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
the selected hardware request is driven by a peripheral with a hardware request/acknowledge protocol at a burst level.
0x1 : B_0x1
the selected hardware request is driven by a peripheral with a hardware request/acknowledge protocol at a block level (see ).
End of enumeration elements list.
TRIGM : trigger mode These bits define the transfer granularity for its conditioning by the trigger. If the channel x is enabled (GPDMA_CxCR.EN asserted) with TRIGPOL[1:0] = 00 or 11, these TRIGM[1:0] bits are ignored. Else, a GPDMA transfer is conditioned by at least one trigger hit: first burst read of a 2D/repeated block transfer is conditioned by one hit trigger. – If the peripheral is programmed as a source (DREQ = 0) of the LLI data transfer, each programmed burst read is conditioned. – If the peripheral is programmed as a destination (DREQ = 1) of the LLI data transfer, each programmed burst write is conditioned. The first memory burst read of a (possibly 2D/repeated) block, also named as the first ready FIFO-based source burst, is gated by the occurrence of both the hardware request and the first trigger hit. The GPDMA monitoring of a trigger for channel x is started when the channel is enabled/loaded with a new active trigger configuration: rising or falling edge on a selected trigger (TRIGPOL[1:0] = 01 or respectively TRIGPOL[1:0] = 10). The monitoring of this trigger is kept active during the triggered and uncompleted (data or link) transfer and if a new trigger is detected then, this hit is internally memorized to grant the next transfer, as long as the defined rising or falling edge is not modified, and the TRIGSEL[5:0] is not modified, and the channel is enabled. Transferring a next LLIn+1 that updates the GPDMA_CxTR2 with a new value for any of TRIGSEL[5:0] or TRIGPOL[1:0], resets the monitoring, trashing the memorized hit of the formerly defined LLIn trigger. After a first new trigger hitn+1 is memorized, if another second trigger hitn+2 is detected and if the hitn triggered transfer is still not completed, hitn+2 is lost and not memorized.memorized. A trigger overrun flag is reported (GPDMA_CxSR.TOF =1 ), and an interrupt is generated if enabled (GPDMA_CxCR.TOIE = 1). The channel is not automatically disabled by hardware due to a trigger overrun. Note: When the source block size is not a multiple of the source burst size and is a multiple of the source data width, then the last programmed source burst is not completed and is internally shorten to match the block size. In this case, if TRIGM[1:0] = 11 and (SWREQ =1 or (SWREQ = 0 and DREQ =0 )), the shortened burst transfer (by singles or/and by bursts of lower length) is conditioned once by the trigger. When the programmed destination burst is internally shortened by singles or/and by bursts of lower length (versus FIFO size, versus block size, 1-Kbyte boundary address crossing): if the trigger is conditioning the programmed destination burst (if TRIGM[1:0] = 11 and SWREQ = 0 and DREQ = 1), this shortened destination burst transfer is conditioned once by the trigger.
bits : 14 - 15 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at block level: the first burst read of each block transfer is conditioned by one hit trigger (channel x = 12 to 15, for each block if a 2D/repeated block is configured with GPDMA_CxBR1.BRC[10:0] ≠ 0).
0x1 : B_0x1
channel x = 0 to 11, same as 00 channel x=12 to 15, at 2D/repeated block level, the
0x2 : B_0x2
at link level: a LLI link transfer is conditioned by one hit trigger. The LLI data transfer (if any) is not conditioned.
0x3 : B_0x3
at programmed burst level: If SWREQ = 1, each programmed burst read is conditioned by one hit trigger. If SWREQ = 0, each programmed burst that is requested by the selected peripheral, is conditioned by one hit trigger.
End of enumeration elements list.
TRIGSEL : trigger event input selection These bits select the trigger event input of the GPDMA transfer (as per ), with an active trigger event if TRIGPOL[1:0] ≠ 00.
bits : 16 - 21 (6 bit)
access : read-write
TRIGPOL : trigger event polarity These bits define the polarity of the selected trigger event input defined by TRIGSEL[5:0].
bits : 24 - 25 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no trigger (masked trigger event)
0x1 : B_0x1
trigger on the rising edge
0x2 : B_0x2
trigger on the falling edge
0x3 : B_0x3
same as 00
End of enumeration elements list.
TCEM : transfer complete event mode These bits define the transfer granularity for the transfer complete and half transfer complete events generation. Note: If the initial LLI0 data transfer is null/void (directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] = 0), then neither the complete transfer event nor the half transfer event is generated. Note: If the initial LLI0 data transfer is null/void (directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] = 0), then neither the complete transfer event nor the half transfer event is generated. Note: If the initial LLI0 data transfer is null/void (i.e. directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] =0 ), then the half transfer event is not generated, and the transfer complete event is generated when is completed the loading of the LLI1.
bits : 30 - 31 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at block level (when GPDMA_CxBR1.BNDT[15:0] = 0): the complete (and the half) transfer event is generated at the (respectively half of the) end of a block.
0x1 : B_0x1
channel x = 0 to 11, same as 00 channel x=12 to 15, at 2D/repeated block level (when GPDMA_CxBR1.BRC[10:0] = 0 and GPDMA_CxBR1.BNDT[15:0] = 0), the complete (and the half) transfer event is generated at the end (respectively half of the end) of the 2D/repeated block.
0x2 : B_0x2
at LLI level: the complete transfer event is generated at the end of the LLI transfer, including the update of the LLI if any. The half transfer event is generated at the half of the LLI data transfer (the LLI data transfer being a block transfer or a 2D/repeated block transfer for channel x = 12 to 15), if any data transfer.
0x3 : B_0x3
at channel level: the complete transfer event is generated at the end of the last LLI transfer. The half transfer event is generated at the half of the data transfer of the last LLI. The last LLI updates the link address GPDMA_CxLLR.LA[15:2] to zero and clears all the GPDMA_CxLLR update bits (UT1, UT2, UB1, USA, UDA and ULL, plus UT3 and UB2 if present). If the channel transfer is continuous/infinite, no event is generated.
End of enumeration elements list.
GPDMA channel 14 alternate block register 1
address_offset : 0x798 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
BNDT : block number of data bytes to transfer from the source Block size transferred from the source. When the channel is enabled, this field becomes read-only and is decremented, indicating the remaining number of data items in the current source block to be transferred. BNDT[15:0] is programmed in number of bytes, maximum source block size is 64 Kbytes -1. Once the last data transfer is completed (BNDT[15:0] = 0): - if GPDMA_CxLLR.UB1 = 1, this field is updated by the LLI in the memory. - if GPDMA_CxLLR.UB1 = 0 and if there is at least one not null Uxx update bit, this field is internally restored to the programmed value. - if all GPDMA_CxLLR.Uxx = 0 and if GPDMA_CxLLR.LA[15:0] ≠ 0, this field is internally restored to the programmed value (infinite/continuous last LLI). - if GPDMA_CxLLR = 0, this field is kept as zero following the last LLI data transfer. Note: A non-null source block size must be a multiple of the source data width (BNDT[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued. When configured in packing mode (GPDMA_CxTR1.PAM[1]=1 and destination data width different from source data width), a non-null source block size must be a multiple of the destination data width (BNDT[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued.
bits : 0 - 15 (16 bit)
access : read-write
BRC : Block repeat counter This field contains the number of repetitions of the current block (0 to 2047). When the channel is enabled, this field becomes read-only. After decrements, this field indicates the remaining number of blocks, excluding the current one. This counter is hardware decremented for each completed block transfer. Once the last block transfer is completed (BRC[10:0] = BNDT[15:0] = 0): If GPDMA_CxLLR.UB1 = 1, all GPDMA_CxBR1 fields are updated by the next LLI in the memory. If GPDMA_CxLLR.UB1 = 0 and if there is at least one not null Uxx update bit, this field is internally restored to the programmed value. if all GPDMA_CxLLR.Uxx = 0 and if GPDMA_CxLLR.LA[15:0] ≠ 0, this field is internally restored to the programmed value (infinite/continuous last LLI). if GPDMA_CxLLR = 0, this field is kept as zero following the last LLI and data transfer.
bits : 16 - 26 (11 bit)
access : read-write
SDEC : source address decrement
bits : 28 - 28 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
At the end of a programmed burst transfer from the source, the GPDMA_CxSAR register is updated by adding the programmed offset GPDMA_CxTR3.SAO to the current GPDMA_CxSAR value (current source address)
0x1 : B_0x1
At the end of a programmed burst transfer from the source, the GPDMA_CxSAR register is updated by subtracting the programmed offset GPDMA_CxTR3.SAO to the current GPDMA_CxSAR value (current source address)
End of enumeration elements list.
DDEC : destination address decrement
bits : 29 - 29 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
At the end of a programmed burst transfer to the destination, the GPDMA_CxDAR register is updated by adding the programmed offset GPDMA_CxTR3.DAO to the current GPDMA_CxDAR value (current destination address)
0x1 : B_0x1
At the end of a programmed burst transfer to the destination, the GPDMA_CxDAR register is updated by subtracting the programmed offset GPDMA_CxTR3.DAO to the current GPDMA_CxDAR value (current destination address)
End of enumeration elements list.
BRSDEC : Block repeat source address decrement Note: On top of this increment/decrement (depending on BRSDEC), GPDMA_CxSAR is in the same time also updated by the increment/decrement (depending on SDEC) of the GPDMA_CxTR3.SAO value, as it is done after any programmed burst transfer.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at the end of a block transfer, the GPDMA_CxSAR register is updated by adding the programmed offset GPDMA_CxBR2.BRSAO to the current GPDMA_CxSAR value (current source address)
0x1 : B_0x1
at the end of a block transfer, the GPDMA_CxSAR register is updated by subtracting the programmed offset GPDMA_CxBR2.BRSAO from the current GPDMA_CxSAR value (current source address)
End of enumeration elements list.
BRDDEC : Block repeat destination address decrement Note: On top of this increment/decrement (depending on BRDDEC), GPDMA_CxDAR is in the same time also updated by the increment/decrement (depending on DDEC) of the GPDMA_CxTR3.DAO value, as it is usually done at the end of each programmed burst transfer.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at the end of a block transfer, the GPDMA_CxDAR register is updated by adding the programmed offset GPDMA_CxBR2.BRDAO to the current GPDMA_CxDAR value (current destination address)
0x1 : B_0x1
at the end of a block transfer, the GPDMA_CxDAR register is updated by subtracting the programmed offset GPDMA_CxBR2.BRDAO from the current GPDMA_CxDAR value (current destination address)
End of enumeration elements list.
GPDMA channel 14 source address register
address_offset : 0x79C Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SA : source address This field is the pointer to the address from which the next data is read. During the channel activity, depending on the source addressing mode (GPDMA_CxTR1.SINC), this field is kept fixed or incremented by the data width (GPDMA_CxTR1.SDW_LOG2[1:0]) after each single source data, reflecting the next address from which data is read. During the channel activity, this address is updated after each completed source burst, consequently to: the programmed source burst either in fixed addressing mode or in contiguous-data incremented mode. If contiguously incremented (GPDMA_CxTR1.SINC = 1), then the additional address offset value is the programmed burst size, as defined by GPDMA_CxTR1.SBL_1[5:0] and GPDMA_CxTR1.SDW_LOG2[21:0] the additional source incremented/decremented offset value as programmed by GPDMA_CxBR1.SDEC and GPDMA_CxTR3.SAO[12:0] once/if completed source block transfer, for a channel x with 2D addressing capability (x = 12 to 15). additional block repeat source incremented/decremented offset value as programmed by GPDMA_CxBR1.BRSDEC and GPDMA_CxBR2.BRSAO[15:0] In linked-list mode, after a LLI data transfer is completed, this register is automatically updated by GPDMA from the memory, provided the LLI is set with GPDMA_CxLLR.USA = 1. Note: A source address must be aligned with the programmed data width of a source single (SA[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued. When the source block size is not a multiple of the source burst size and is a multiple of the source data width, the last programmed source burst is not completed and is internally shorten to match the block size. In this case, the additional GPDMA_CxTR3.SAO[12:0] is not applied.
bits : 0 - 31 (32 bit)
access : read-write
GPDMA channel 14 destination address register
address_offset : 0x7A0 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
DA : destination address This field is the pointer to the address from which the next data is written. During the channel activity, depending on the destination addressing mode (GPDMA_CxTR1.DINC), this field is kept fixed or incremented by the data width (GPDMA_CxTR1.DDW_LOG2[21:0]) after each single destination data, reflecting the next address from which data is written. During the channel activity, this address is updated after each completed destination burst, consequently to: the programmed destination burst either in fixed addressing mode or in contiguous-data incremented mode. If contiguously incremented (GPDMA_CxTR1.DINC = 1), then the additional address offset value is the programmed burst size, as defined by GPDMA_CxTR1.DBL_1[5:0] and GPDMA_CxTR1.DDW_LOG2[1:0] the additional destination incremented/decremented offset value as programmed by GPDMA_CxBR1.DDEC and GPDMA_CxTR3.DAO[12:0] once/if completed destination block transfer, for a channel x with 2D addressing capability (x = 12 to 15), the additional block repeat destination incremented/decremented offset value as programmed by GPDMA_CxBR1.BRDDEC and GPDMA_CxBR2.BRDAO[15:0] In linked-list mode, after a LLI data transfer is completed, this register is automatically updated by the GPDMA from the memory, provided the LLI is set with GPDMA_CxLLR.UDA = 1. Note: A destination address must be aligned with the programmed data width of a destination burst (DA[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued.
bits : 0 - 31 (32 bit)
access : read-write
GPDMA channel 14 transfer register 3
address_offset : 0x7A4 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SAO : source address offset increment The source address, pointed by GPDMA_CxSAR, is incremented or decremented (depending on GPDMA_CxBR1.SDEC) by this offset SAO[12:0] for each programmed source burst. This offset is not including and is added to the programmed burst size when the completed burst is addressed in incremented mode (GPDMA_CxTR1.SINC = 1). Note: A source address offset must be aligned with the programmed data width of a source burst (SAO[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else a user setting error is reported and none transfer is issued. When the source block size is not a multiple of the destination burst size and is a multiple of the source data width, then the last programmed source burst is not completed and is internally shorten to match the block size. In this case, the additional GPDMA_CxTR3.SAO[12:0] is not applied.
bits : 0 - 12 (13 bit)
access : read-write
DAO : destination address offset increment The destination address, pointed by GPDMA_CxDAR, is incremented or decremented (depending on GPDMA_CxBR1.DDEC) by this offset DAO[12:0] for each programmed destination burst. This offset is not including and is added to the programmed burst size when the completed burst is addressed in incremented mode (GPDMA_CxTR1.DINC = 1). Note: A destination address offset must be aligned with the programmed data width of a destination burst (DAO[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued.
bits : 16 - 28 (13 bit)
access : read-write
GPDMA channel 14 block register 2
address_offset : 0x7A8 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
BRSAO : Block repeated source address offset For a channel with 2D addressing capability, this field is used to update (by addition or subtraction depending on GPDMA_CxBR1.BRSDEC) the current source address (GPDMA_CxSAR) at the end of a block transfer. Note: A block repeated source address offset must be aligned with the programmed data width of a source burst (BRSAO[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued.
bits : 0 - 15 (16 bit)
access : read-write
BRDAO : Block repeated destination address offset For a channel with 2D addressing capability, this field is used to update (by addition or subtraction depending on GPDMA_CxBR1.BRDDEC) the current destination address (GPDMA_CxDAR) at the end of a block transfer. Note: A block repeated destination address offset must be aligned with the programmed data width of a destination burst (BRDAO[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued.
bits : 16 - 31 (16 bit)
access : read-write
GPDMA channel 14 alternate linked-list address register
address_offset : 0x7CC Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
LA : pointer (16-bit low-significant address) to the next linked-list data structure If UT1 = UT2 = UB1 = USA = UDA = ULL = 0 and if LA[15:20] = 0, the current LLI is the last one. The channel transfer is completed without any update of the linked-list GPDMA register file. Else, this field is the pointer to the memory address offset from which the next linked-list data structure is automatically fetched from, once the data transfer is completed, in order to conditionally update the linked-list GPDMA internal register file (GPDMA_CxCTR1, GPDMA_CxTR2, GPDMA_CxBR1, GPDMA_CxSAR, GPDMA_CxDAR and GPDMA_CxLLR). Note: The user must program the pointer to be 32-bit aligned. The two low-significant bits are write ignored.
bits : 2 - 15 (14 bit)
access : read-write
ULL : Update GPDMA_CxLLR register from memory This bit is used to control the update of GPDMA_CxLLR from the memory during the link transfer.
bits : 16 - 16 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxLLR update
0x1 : B_0x1
GPDMA_CxLLR update
End of enumeration elements list.
UB2 : Update GPDMA_CxBR2 from memory This bit controls the update of GPDMA_CxBR2 from the memory during the link transfer.
bits : 25 - 25 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxBR2 update
0x1 : B_0x1
GPDMA_CxBR2 update
End of enumeration elements list.
UT3 : Update GPDMA_CxTR3 from memory This bit controls the update of GPDMA_CxTR3 from the memory during the link transfer.
bits : 26 - 26 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR3 update
0x1 : B_0x1
GPDMA_CxTR3 update
End of enumeration elements list.
UDA : Update GPDMA_CxDAR register from memory This bit is used to control the update of GPDMA_CxDAR from the memory during the link transfer.
bits : 27 - 27 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxDAR update
0x1 : B_0x1
GPDMA_CxDAR update
End of enumeration elements list.
USA : update GPDMA_CxSAR from memory This bit controls the update of GPDMA_CxSAR from the memory during the link transfer.
bits : 28 - 28 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxSAR update
0x1 : B_0x1
GPDMA_CxSAR update
End of enumeration elements list.
UB1 : Update GPDMA_CxBR1 from memory This bit controls the update of GPDMA_CxBR1 from the memory during the link transfer. If UB1 = 0 and if GPDMA_CxLLR ≠ 0, the linked-list is not completed. GPDMA_CxBR1.BNDT[15:0] is then restored to the programmed value after data transfer is completed and before the link transfer.
bits : 29 - 29 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxBR1 update from memory (GPDMA_CxBR1.BNDT[15:0] restored if any link transfer)
0x1 : B_0x1
GPDMA_CxBR1 update
End of enumeration elements list.
UT2 : Update GPDMA_CxTR2 from memory This bit controls the update of GPDMA_CxTR2 from the memory during the link transfer.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR2 update
0x1 : B_0x1
GPDMA_CxTR2 update
End of enumeration elements list.
UT1 : Update GPDMA_CxTR1 from memory This bit controls the update of GPDMA_CxTR1 from the memory during the link transfer.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR1 update
0x1 : B_0x1
GPDMA_CxTR1 update
End of enumeration elements list.
GPDMA channel 15 linked-list base address register
address_offset : 0x7D0 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
LBA : linked-list base address of GPDMA channel x
bits : 16 - 31 (16 bit)
access : read-write
GPDMA channel 15 flag clear register
address_offset : 0x7DC Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
TCF : transfer complete flag clear
bits : 8 - 8 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding TCF flag cleared
End of enumeration elements list.
HTF : half transfer flag clear
bits : 9 - 9 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding HTF flag cleared
End of enumeration elements list.
DTEF : data transfer error flag clear
bits : 10 - 10 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding DTEF flag cleared
End of enumeration elements list.
ULEF : update link transfer error flag clear
bits : 11 - 11 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding ULEF flag cleared
End of enumeration elements list.
USEF : user setting error flag clear
bits : 12 - 12 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding USEF flag cleared
End of enumeration elements list.
SUSPF : completed suspension flag clear
bits : 13 - 13 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding SUSPF flag cleared
End of enumeration elements list.
TOF : trigger overrun flag clear
bits : 14 - 14 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding TOF flag cleared
End of enumeration elements list.
GPDMA channel 15 status register
address_offset : 0x7E0 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
IDLEF : idle flag This idle flag is de-asserted by hardware when the channel is enabled (GPDMA_CxCR.EN = 1) with a valid channel configuration (no USEF to be immediately reported). This idle flag is asserted after hard reset or by hardware when the channel is back in idle state (in suspended or disabled state).
bits : 0 - 0 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
channel not in idle state
0x1 : B_0x1
channel in idle state
End of enumeration elements list.
TCF : transfer complete flag A transfer complete event is either a block transfer complete, a 2D/repeated block transfer complete, a LLI transfer complete including the upload of the next LLI if any, or the full linked-list completion, depending on the transfer complete event mode (GPDMA_CxTR2.TCEM[1:0]).
bits : 8 - 8 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no transfer complete event
0x1 : B_0x1
a transfer complete event occurred
End of enumeration elements list.
HTF : half transfer flag An half transfer event is either an half block transfer or an half 2D/repeated block transfer, depending on the transfer complete event mode (GPDMA_CxTR2.TCEM[1:0]). An half block transfer occurs when half of the bytes of the source block size (rounded up integer of GPDMA_CxBR1.BNDT[15:0]/2) has been transferred to the destination. An half 2D/repeated block transfer occurs when half of the repeated blocks (rounded up integer of (GPDMA_CxBR1.BRC[10:0]+1)/2)) has been transferred to the destination.
bits : 9 - 9 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no half transfer event
0x1 : B_0x1
an half transfer event occurred
End of enumeration elements list.
DTEF : data transfer error flag
bits : 10 - 10 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no data transfer error event
0x1 : B_0x1
a master bus error event occurred on a data transfer
End of enumeration elements list.
ULEF : update link transfer error flag
bits : 11 - 11 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no update link transfer error event
0x1 : B_0x1
a master bus error event occurred while updating a linked-list register from memory
End of enumeration elements list.
USEF : user setting error flag
bits : 12 - 12 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no user setting error event
0x1 : B_0x1
a user setting error event occurred
End of enumeration elements list.
SUSPF : completed suspension flag
bits : 13 - 13 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no completed suspension event
0x1 : B_0x1
a completed suspension event occurred
End of enumeration elements list.
TOF : trigger overrun flag
bits : 14 - 14 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no trigger overrun event
0x1 : B_0x1
a trigger overrun event occurred
End of enumeration elements list.
FIFOL : monitored FIFO level Number of available write beats in the FIFO, in units of the programmed destination data width (see GPDMA_CxTR1.DDW_LOG2[1:0], in units of bytes, half-words, or words). Note: After having suspended an active transfer, the user may need to read FIFOL[7:0], additionally to GPDMA_CxBR1.BDNT[15:0] and GPDMA_CxBR1.BRC[10:0], to know how many data have been transferred to the destination. Before reading, the user may wait for the transfer to be suspended (GPDMA_CxSR.SUSPF = 1).
bits : 16 - 23 (8 bit)
access : read-only
GPDMA channel 15 control register
address_offset : 0x7E4 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
EN : enable Writing 1 into the field RESET (bit 1) causes the hardware to de-assert this bit, whatever is written into this bit 0. Else: this bit is de-asserted by hardware when there is a transfer error (master bus error or user setting error) or when there is a channel transfer complete (channel ready to be configured, e.g. if LSM=1 at the end of a single execution of the LLI). Else, this bit can be asserted by software. Writing 0 into this EN bit is ignored.
bits : 0 - 0 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
write: ignored, read: channel disabled
0x1 : B_0x1
write: enable channel, read: channel enabled
End of enumeration elements list.
RESET : reset This bit is write only. Writing 0 has no impact. Writing 1 implies the reset of the following: the FIFO, the channel internal state, SUSP and EN bits (whatever is written receptively in bit 2 and bit 0). The reset is effective when the channel is in steady state, meaning one of the following: - active channel in suspended state (GPDMA_CxSR.SUSPF = 1 and GPDMA_CxSR.IDLEF = GPDMA_CxCR.EN = 1) - channel in disabled state (GPDMA_CxSR.IDLEF = 1 and GPDMA_CxCR.EN = 0). After writing a RESET, to continue using this channel, the user must explicitly reconfigure the channel including the hardware-modified configuration registers (GPDMA_CxBR1, GPDMA_CxSAR and GPDMA_CxDAR) before enabling again the channel (see the programming sequence in ).
bits : 1 - 1 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no channel reset
0x1 : B_0x1
channel reset
End of enumeration elements list.
SUSP : suspend Writing 1 into the field RESET (bit 1) causes the hardware to de-assert this bit, whatever is written into this bit 2. Else: Software must write 1 in order to suspend an active channel i.e. a channel with an on-going GPDMA transfer over its master ports. The software must write 0 in order to resume a suspended channel, following the programming sequence detailed in .
bits : 2 - 2 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
write: resume channel, read: channel not suspended
0x1 : B_0x1
write: suspend channel, read: channel suspended.
End of enumeration elements list.
TCIE : transfer complete interrupt enable
bits : 8 - 8 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
HTIE : half transfer complete interrupt enable
bits : 9 - 9 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
DTEIE : data transfer error interrupt enable
bits : 10 - 10 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
ULEIE : update link transfer error interrupt enable
bits : 11 - 11 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
USEIE : user setting error interrupt enable
bits : 12 - 12 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
SUSPIE : completed suspension interrupt enable
bits : 13 - 13 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
TOIE : trigger overrun interrupt enable
bits : 14 - 14 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
LSM : Link step mode First the (possible 1D/repeated) block transfer is executed as defined by the current internal register file until GPDMA_CxBR1.BNDT[15:0] = 0 and GPDMA_CxBR1.BRC[10:0] = 0 if present. Secondly the next linked-list data structure is conditionally uploaded from memory as defined by GPDMA_CxLLR. Then channel execution is completed. Note: This bit must be written when EN=0. This bit is read-only when EN=1.
bits : 16 - 16 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
channel executed for the full linked-list and completed at the end of the last LLI (GPDMA_CxLLR = 0). The 16 low-significant bits of the link address are null (LA[15:0] = 0) and all the update bits are null (UT1 =UB1 = UT2 = USA = UDA = ULL = 0 and UT3 = UB2 = 0 if present). Then GPDMA_CxBR1.BNDT[15:0] = 0 and GPDMA_CxBR1.BRC[10:0] = 0 if present.
0x1 : B_0x1
channel executed once for the current LLI
End of enumeration elements list.
LAP : linked-list allocated port This bit is used to allocate the master port for the update of the GPDMA linked-list registers from the memory. Note: This bit must be written when EN=0. This bit is read-only when EN=1.
bits : 17 - 17 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
PRIO : priority level of the channel x GPDMA transfer versus others Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 22 - 23 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
low priority, low weight
0x1 : B_0x1
low priority, mid weight
0x2 : B_0x2
low priority, high weight
0x3 : B_0x3
high priority
End of enumeration elements list.
GPDMA configuration lock register
address_offset : 0x8 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
LOCK0 : LOCK0
bits : 0 - 0 (1 bit)
access : read-write
LOCK1 : LOCK1
bits : 1 - 1 (1 bit)
access : read-write
LOCK2 : LOCK2
bits : 2 - 2 (1 bit)
access : read-write
LOCK3 : LOCK3
bits : 3 - 3 (1 bit)
access : read-write
LOCK4 : LOCK4
bits : 4 - 4 (1 bit)
access : read-write
LOCK5 : LOCK5
bits : 5 - 5 (1 bit)
access : read-write
LOCK6 : LOCK6
bits : 6 - 6 (1 bit)
access : read-write
LOCK7 : LOCK7
bits : 7 - 7 (1 bit)
access : read-write
LOCK8 : LOCK8
bits : 8 - 8 (1 bit)
access : read-write
LOCK9 : LOCK9
bits : 9 - 9 (1 bit)
access : read-write
LOCK10 : LOCK10
bits : 10 - 10 (1 bit)
access : read-write
LOCK11 : LOCK11
bits : 11 - 11 (1 bit)
access : read-write
LOCK12 : LOCK12
bits : 12 - 12 (1 bit)
access : read-write
LOCK13 : LOCK13
bits : 13 - 13 (1 bit)
access : read-write
LOCK14 : LOCK14
bits : 14 - 14 (1 bit)
access : read-write
LOCK15 : LOCK15
bits : 15 - 15 (1 bit)
access : read-write
GPDMA channel 15 transfer register 1
address_offset : 0x810 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SDW_LOG2 : binary logarithm of the source data width of a burst in bytes Note: Setting a 8-byte data width causes a user setting error to be reported and no transfer is issued. A source block size must be a multiple of the source data width (GPDMA_CxBR1.BNDT[2:0] versus SDW_LOG2[1:0]). Otherwise, a user setting error is reported and no transfer is issued. A source single transfer must have an aligned address with its data width (start address GPDMA_CxSAR[2:0] versus SDW_LOG2[1:0]). Otherwise, a user setting error is reported and none transfer is issued.
bits : 0 - 1 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
byte
0x1 : B_0x1
half-word (2 bytes)
0x2 : B_0x2
word (4 bytes)
0x3 : B_0x3
user setting error reported and no transfer issued
End of enumeration elements list.
SINC : source incrementing burst The source address, pointed by GPDMA_CxSAR, is kept constant after a burst beat/single transfer or is incremented by the offset value corresponding to a contiguous data after a burst beat/single transfer.
bits : 3 - 3 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
fixed burst
0x1 : B_0x1
contiguously incremented burst
End of enumeration elements list.
SBL_1 : source burst length minus 1, between 0 and 63 The burst length unit is one data named beat within a burst. If SBL_1[5:0] =0 , the burst can be named as single. Each data/beat has a width defined by the destination data width SDW_LOG2[1:0]. Note: If a burst transfer crossed a 1-Kbyte address boundary on a AHB transfer, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the AHB protocol. If a burst transfer is of length greater than the FIFO size of the channel x, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the FIFO size. Transfer performance is lower, with GPDMA re-arbitration between effective and lower bursts/singles, but the data integrity is guaranteed.
bits : 4 - 9 (6 bit)
access : read-write
PAM : padding/alignment mode If DDW_LOG2[1:0] = SDW_LOG2[1:0]: if the data width of a burst destination transfer is equal to the data width of a burst source transfer, these bits are ignored. Else: - Case 1: If destination data width > source data width 1x: successive source data are FIFO queued and packed at the destination data width, in a left (LSB) to right (MSB) order (named little endian), before a destination transfer - Case 2: If destination data width < source data width 1x: source data is FIFO queued and unpacked at the destination data width, to be transferred in a left (LSB) to right (MSB) order (named little endian) to the destination Note:
bits : 11 - 12 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
source data is transferred as right aligned, left-truncated down to the destination data width
0x1 : B_0x1
source data is transferred as left-aligned, right-truncated down to the destination data width
0x0 : B_0x0
source data is transferred as right aligned, left-truncated down to the destination data width
0x1 : B_0x1
source data is transferred as left-aligned, right-truncated down to the destination data width
End of enumeration elements list.
SBX : source byte exchange within the unaligned half-word of each source word If the source data width is shorter than a word, this bit is ignored. If the source data width is a word:
bits : 13 - 13 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no byte-based exchange within the unaligned half-word of each source word
0x1 : B_0x1
the two consecutive bytes within the unaligned half-word of each source word are exchanged.
End of enumeration elements list.
SAP : source allocated port This bit is used to allocate the master port for the source transfer Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 14 - 14 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
SSEC : security attribute of the GPDMA transfer from the source If GPDMA_SECCFGR.SECx = 1 and the access is secure: This is a secure register bit. This bit can only be read by a secure software. This bit must be written by a secure software when GPDMA_SECCFGR.SECx =1 . A secure write is ignored when GPDMA_SECCFGR.SECx = 0. When GPDMA_SECCFGR.SECx is de-asserted, this SSEC bit is also de-asserted by hardware (on a secure reconfiguration of the channel as non-secure), and the GPDMA transfer from the source is non-secure.
bits : 15 - 15 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
GPDMA transfer non-secure
0x1 : B_0x1
GPDMA transfer secure
End of enumeration elements list.
DDW_LOG2 : binary logarithm of the destination data width of a burst, in bytes Note: Setting a 8-byte data width causes a user setting error to be reported and none transfer is issued. A destination burst transfer must have an aligned address with its data width (start address GPDMA_CxDAR[2:0] and address offset GPDMA_CxTR3.DAO[2:0], versus DDW_LOG2[1:0]). Otherwise a user setting error is reported and no transfer is issued.
bits : 16 - 17 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
byte
0x1 : B_0x1
half-word (2 bytes)
0x2 : B_0x2
word (4 bytes)
0x3 : B_0x3
user setting error reported and no transfer issued
End of enumeration elements list.
DINC : destination incrementing burst The destination address, pointed by GPDMA_CxDAR, is kept constant after a burst beat/single transfer, or is incremented by the offset value corresponding to a contiguous data after a burst beat/single transfer.
bits : 19 - 19 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
fixed burst
0x1 : B_0x1
contiguously incremented burst
End of enumeration elements list.
DBL_1 : destination burst length minus 1, between 0 and 63 The burst length unit is one data named beat within a burst. If DBL_1[5:0] =0 , the burst can be named as single. Each data/beat has a width defined by the destination data width DDW_LOG2[1:0]. Note: If a burst transfer crossed a 1-Kbyte address boundary on a AHB transfer, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the AHB protocol. If a burst transfer is of length greater than the FIFO size of the channel x, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the FIFO size. Transfer performance is lower, with GPDMA re-arbitration between effective and lower bursts/singles, but the data integrity is guaranteed.
bits : 20 - 25 (6 bit)
access : read-write
DBX : destination byte exchange If the destination data size is a byte, this bit is ignored. If the destination data size is not a byte:
bits : 26 - 26 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no byte-based exchange within half-word
0x1 : B_0x1
the two consecutive (post PAM) bytes are exchanged in each destination half-word.
End of enumeration elements list.
DHX : destination half-word exchange If the destination data size is shorter than a word, this bit is ignored. If the destination data size is a word:
bits : 27 - 27 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no halfword-based exchanged within word
0x1 : B_0x1
the two consecutive (post PAM) half-words are exchanged in each destination word.
End of enumeration elements list.
DAP : destination allocated port This bit is used to allocate the master port for the destination transfer Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
DSEC : security attribute of the GPDMA transfer to the destination If GPDMA_SECCFGR.SECx = 1 and the access is secure: This is a secure register bit. This bit can only be read by a secure software. This bit must be written by a secure software when GPDMA_SECCFGR.SECx = 1. A secure write is ignored when GPDMA_SECCFGR.SECx = 0. When GPDMA_SECCFGR.SECx is de-asserted, this DSEC bit is also de-asserted by hardware (on a secure reconfiguration of the channel as non-secure), and the GPDMA transfer to the destination is non-secure.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
GPDMA transfer non-secure
0x1 : B_0x1
GPDMA transfer secure
End of enumeration elements list.
GPDMA channel 15 transfer register 2
address_offset : 0x814 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
REQSEL : GPDMA hardware request selection These bits are ignored if channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer). Else, the selected hardware request is internally taken into account as per . The user must not assign a same input hardware request (same REQSEL[6:0] value) to different active GPDMA channels (GPDMA_CxCR.EN = 1 and GPDMA_CxTR2.SWREQ = 0 for these channels). GPDMA is not intended to hardware support the case of simultaneous enabled channels incorrectly configured with a same hardware peripheral request signal, and there is no user setting error reporting.
bits : 0 - 6 (7 bit)
access : read-write
SWREQ : software request This bit is internally taken into account when GPDMA_CxCR.EN is asserted.
bits : 9 - 9 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no software request. The selected hardware request REQSEL[6:0] is taken into account.
0x1 : B_0x1
software request for a memory-to-memory transfer. The default selected hardware request as per REQSEL[6:0] is ignored.
End of enumeration elements list.
DREQ : destination hardware request This bit is ignored if channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer). Else: Note:
bits : 10 - 10 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
selected hardware request driven by a source peripheral (request signal taken into account by the GPDMA transfer scheduler over the source/read port)
0x1 : B_0x1
selected hardware request driven by a destination peripheral (request signal taken into account by the GPDMA transfer scheduler over the destination/write port)
End of enumeration elements list.
BREQ : Block hardware request If the channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer), this bit is ignored. Else:
bits : 11 - 11 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
the selected hardware request is driven by a peripheral with a hardware request/acknowledge protocol at a burst level.
0x1 : B_0x1
the selected hardware request is driven by a peripheral with a hardware request/acknowledge protocol at a block level (see ).
End of enumeration elements list.
TRIGM : trigger mode These bits define the transfer granularity for its conditioning by the trigger. If the channel x is enabled (GPDMA_CxCR.EN asserted) with TRIGPOL[1:0] = 00 or 11, these TRIGM[1:0] bits are ignored. Else, a GPDMA transfer is conditioned by at least one trigger hit: first burst read of a 2D/repeated block transfer is conditioned by one hit trigger. – If the peripheral is programmed as a source (DREQ = 0) of the LLI data transfer, each programmed burst read is conditioned. – If the peripheral is programmed as a destination (DREQ = 1) of the LLI data transfer, each programmed burst write is conditioned. The first memory burst read of a (possibly 2D/repeated) block, also named as the first ready FIFO-based source burst, is gated by the occurrence of both the hardware request and the first trigger hit. The GPDMA monitoring of a trigger for channel x is started when the channel is enabled/loaded with a new active trigger configuration: rising or falling edge on a selected trigger (TRIGPOL[1:0] = 01 or respectively TRIGPOL[1:0] = 10). The monitoring of this trigger is kept active during the triggered and uncompleted (data or link) transfer and if a new trigger is detected then, this hit is internally memorized to grant the next transfer, as long as the defined rising or falling edge is not modified, and the TRIGSEL[5:0] is not modified, and the channel is enabled. Transferring a next LLIn+1 that updates the GPDMA_CxTR2 with a new value for any of TRIGSEL[5:0] or TRIGPOL[1:0], resets the monitoring, trashing the memorized hit of the formerly defined LLIn trigger. After a first new trigger hitn+1 is memorized, if another second trigger hitn+2 is detected and if the hitn triggered transfer is still not completed, hitn+2 is lost and not memorized.memorized. A trigger overrun flag is reported (GPDMA_CxSR.TOF =1 ), and an interrupt is generated if enabled (GPDMA_CxCR.TOIE = 1). The channel is not automatically disabled by hardware due to a trigger overrun. Note: When the source block size is not a multiple of the source burst size and is a multiple of the source data width, then the last programmed source burst is not completed and is internally shorten to match the block size. In this case, if TRIGM[1:0] = 11 and (SWREQ =1 or (SWREQ = 0 and DREQ =0 )), the shortened burst transfer (by singles or/and by bursts of lower length) is conditioned once by the trigger. When the programmed destination burst is internally shortened by singles or/and by bursts of lower length (versus FIFO size, versus block size, 1-Kbyte boundary address crossing): if the trigger is conditioning the programmed destination burst (if TRIGM[1:0] = 11 and SWREQ = 0 and DREQ = 1), this shortened destination burst transfer is conditioned once by the trigger.
bits : 14 - 15 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at block level: the first burst read of each block transfer is conditioned by one hit trigger (channel x = 12 to 15, for each block if a 2D/repeated block is configured with GPDMA_CxBR1.BRC[10:0] ≠ 0).
0x1 : B_0x1
channel x = 0 to 11, same as 00 channel x=12 to 15, at 2D/repeated block level, the
0x2 : B_0x2
at link level: a LLI link transfer is conditioned by one hit trigger. The LLI data transfer (if any) is not conditioned.
0x3 : B_0x3
at programmed burst level: If SWREQ = 1, each programmed burst read is conditioned by one hit trigger. If SWREQ = 0, each programmed burst that is requested by the selected peripheral, is conditioned by one hit trigger.
End of enumeration elements list.
TRIGSEL : trigger event input selection These bits select the trigger event input of the GPDMA transfer (as per ), with an active trigger event if TRIGPOL[1:0] ≠ 00.
bits : 16 - 21 (6 bit)
access : read-write
TRIGPOL : trigger event polarity These bits define the polarity of the selected trigger event input defined by TRIGSEL[5:0].
bits : 24 - 25 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no trigger (masked trigger event)
0x1 : B_0x1
trigger on the rising edge
0x2 : B_0x2
trigger on the falling edge
0x3 : B_0x3
same as 00
End of enumeration elements list.
TCEM : transfer complete event mode These bits define the transfer granularity for the transfer complete and half transfer complete events generation. Note: If the initial LLI0 data transfer is null/void (directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] = 0), then neither the complete transfer event nor the half transfer event is generated. Note: If the initial LLI0 data transfer is null/void (directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] = 0), then neither the complete transfer event nor the half transfer event is generated. Note: If the initial LLI0 data transfer is null/void (i.e. directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] =0 ), then the half transfer event is not generated, and the transfer complete event is generated when is completed the loading of the LLI1.
bits : 30 - 31 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at block level (when GPDMA_CxBR1.BNDT[15:0] = 0): the complete (and the half) transfer event is generated at the (respectively half of the) end of a block.
0x1 : B_0x1
channel x = 0 to 11, same as 00 channel x=12 to 15, at 2D/repeated block level (when GPDMA_CxBR1.BRC[10:0] = 0 and GPDMA_CxBR1.BNDT[15:0] = 0), the complete (and the half) transfer event is generated at the end (respectively half of the end) of the 2D/repeated block.
0x2 : B_0x2
at LLI level: the complete transfer event is generated at the end of the LLI transfer, including the update of the LLI if any. The half transfer event is generated at the half of the LLI data transfer (the LLI data transfer being a block transfer or a 2D/repeated block transfer for channel x = 12 to 15), if any data transfer.
0x3 : B_0x3
at channel level: the complete transfer event is generated at the end of the last LLI transfer. The half transfer event is generated at the half of the data transfer of the last LLI. The last LLI updates the link address GPDMA_CxLLR.LA[15:2] to zero and clears all the GPDMA_CxLLR update bits (UT1, UT2, UB1, USA, UDA and ULL, plus UT3 and UB2 if present). If the channel transfer is continuous/infinite, no event is generated.
End of enumeration elements list.
GPDMA channel 15 alternate block register 1
address_offset : 0x818 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
BNDT : block number of data bytes to transfer from the source Block size transferred from the source. When the channel is enabled, this field becomes read-only and is decremented, indicating the remaining number of data items in the current source block to be transferred. BNDT[15:0] is programmed in number of bytes, maximum source block size is 64 Kbytes -1. Once the last data transfer is completed (BNDT[15:0] = 0): - if GPDMA_CxLLR.UB1 = 1, this field is updated by the LLI in the memory. - if GPDMA_CxLLR.UB1 = 0 and if there is at least one not null Uxx update bit, this field is internally restored to the programmed value. - if all GPDMA_CxLLR.Uxx = 0 and if GPDMA_CxLLR.LA[15:0] ≠ 0, this field is internally restored to the programmed value (infinite/continuous last LLI). - if GPDMA_CxLLR = 0, this field is kept as zero following the last LLI data transfer. Note: A non-null source block size must be a multiple of the source data width (BNDT[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued. When configured in packing mode (GPDMA_CxTR1.PAM[1]=1 and destination data width different from source data width), a non-null source block size must be a multiple of the destination data width (BNDT[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued.
bits : 0 - 15 (16 bit)
access : read-write
BRC : Block repeat counter This field contains the number of repetitions of the current block (0 to 2047). When the channel is enabled, this field becomes read-only. After decrements, this field indicates the remaining number of blocks, excluding the current one. This counter is hardware decremented for each completed block transfer. Once the last block transfer is completed (BRC[10:0] = BNDT[15:0] = 0): If GPDMA_CxLLR.UB1 = 1, all GPDMA_CxBR1 fields are updated by the next LLI in the memory. If GPDMA_CxLLR.UB1 = 0 and if there is at least one not null Uxx update bit, this field is internally restored to the programmed value. if all GPDMA_CxLLR.Uxx = 0 and if GPDMA_CxLLR.LA[15:0] ≠ 0, this field is internally restored to the programmed value (infinite/continuous last LLI). if GPDMA_CxLLR = 0, this field is kept as zero following the last LLI and data transfer.
bits : 16 - 26 (11 bit)
access : read-write
SDEC : source address decrement
bits : 28 - 28 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
At the end of a programmed burst transfer from the source, the GPDMA_CxSAR register is updated by adding the programmed offset GPDMA_CxTR3.SAO to the current GPDMA_CxSAR value (current source address)
0x1 : B_0x1
At the end of a programmed burst transfer from the source, the GPDMA_CxSAR register is updated by subtracting the programmed offset GPDMA_CxTR3.SAO to the current GPDMA_CxSAR value (current source address)
End of enumeration elements list.
DDEC : destination address decrement
bits : 29 - 29 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
At the end of a programmed burst transfer to the destination, the GPDMA_CxDAR register is updated by adding the programmed offset GPDMA_CxTR3.DAO to the current GPDMA_CxDAR value (current destination address)
0x1 : B_0x1
At the end of a programmed burst transfer to the destination, the GPDMA_CxDAR register is updated by subtracting the programmed offset GPDMA_CxTR3.DAO to the current GPDMA_CxDAR value (current destination address)
End of enumeration elements list.
BRSDEC : Block repeat source address decrement Note: On top of this increment/decrement (depending on BRSDEC), GPDMA_CxSAR is in the same time also updated by the increment/decrement (depending on SDEC) of the GPDMA_CxTR3.SAO value, as it is done after any programmed burst transfer.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at the end of a block transfer, the GPDMA_CxSAR register is updated by adding the programmed offset GPDMA_CxBR2.BRSAO to the current GPDMA_CxSAR value (current source address)
0x1 : B_0x1
at the end of a block transfer, the GPDMA_CxSAR register is updated by subtracting the programmed offset GPDMA_CxBR2.BRSAO from the current GPDMA_CxSAR value (current source address)
End of enumeration elements list.
BRDDEC : Block repeat destination address decrement Note: On top of this increment/decrement (depending on BRDDEC), GPDMA_CxDAR is in the same time also updated by the increment/decrement (depending on DDEC) of the GPDMA_CxTR3.DAO value, as it is usually done at the end of each programmed burst transfer.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at the end of a block transfer, the GPDMA_CxDAR register is updated by adding the programmed offset GPDMA_CxBR2.BRDAO to the current GPDMA_CxDAR value (current destination address)
0x1 : B_0x1
at the end of a block transfer, the GPDMA_CxDAR register is updated by subtracting the programmed offset GPDMA_CxBR2.BRDAO from the current GPDMA_CxDAR value (current destination address)
End of enumeration elements list.
GPDMA channel 15 source address register
address_offset : 0x81C Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SA : source address This field is the pointer to the address from which the next data is read. During the channel activity, depending on the source addressing mode (GPDMA_CxTR1.SINC), this field is kept fixed or incremented by the data width (GPDMA_CxTR1.SDW_LOG2[1:0]) after each single source data, reflecting the next address from which data is read. During the channel activity, this address is updated after each completed source burst, consequently to: the programmed source burst either in fixed addressing mode or in contiguous-data incremented mode. If contiguously incremented (GPDMA_CxTR1.SINC = 1), then the additional address offset value is the programmed burst size, as defined by GPDMA_CxTR1.SBL_1[5:0] and GPDMA_CxTR1.SDW_LOG2[21:0] the additional source incremented/decremented offset value as programmed by GPDMA_CxBR1.SDEC and GPDMA_CxTR3.SAO[12:0] once/if completed source block transfer, for a channel x with 2D addressing capability (x = 12 to 15). additional block repeat source incremented/decremented offset value as programmed by GPDMA_CxBR1.BRSDEC and GPDMA_CxBR2.BRSAO[15:0] In linked-list mode, after a LLI data transfer is completed, this register is automatically updated by GPDMA from the memory, provided the LLI is set with GPDMA_CxLLR.USA = 1. Note: A source address must be aligned with the programmed data width of a source single (SA[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued. When the source block size is not a multiple of the source burst size and is a multiple of the source data width, the last programmed source burst is not completed and is internally shorten to match the block size. In this case, the additional GPDMA_CxTR3.SAO[12:0] is not applied.
bits : 0 - 31 (32 bit)
access : read-write
GPDMA channel 15 destination address register
address_offset : 0x820 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
DA : destination address This field is the pointer to the address from which the next data is written. During the channel activity, depending on the destination addressing mode (GPDMA_CxTR1.DINC), this field is kept fixed or incremented by the data width (GPDMA_CxTR1.DDW_LOG2[21:0]) after each single destination data, reflecting the next address from which data is written. During the channel activity, this address is updated after each completed destination burst, consequently to: the programmed destination burst either in fixed addressing mode or in contiguous-data incremented mode. If contiguously incremented (GPDMA_CxTR1.DINC = 1), then the additional address offset value is the programmed burst size, as defined by GPDMA_CxTR1.DBL_1[5:0] and GPDMA_CxTR1.DDW_LOG2[1:0] the additional destination incremented/decremented offset value as programmed by GPDMA_CxBR1.DDEC and GPDMA_CxTR3.DAO[12:0] once/if completed destination block transfer, for a channel x with 2D addressing capability (x = 12 to 15), the additional block repeat destination incremented/decremented offset value as programmed by GPDMA_CxBR1.BRDDEC and GPDMA_CxBR2.BRDAO[15:0] In linked-list mode, after a LLI data transfer is completed, this register is automatically updated by the GPDMA from the memory, provided the LLI is set with GPDMA_CxLLR.UDA = 1. Note: A destination address must be aligned with the programmed data width of a destination burst (DA[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued.
bits : 0 - 31 (32 bit)
access : read-write
GPDMA channel 15 transfer register 3
address_offset : 0x824 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SAO : source address offset increment The source address, pointed by GPDMA_CxSAR, is incremented or decremented (depending on GPDMA_CxBR1.SDEC) by this offset SAO[12:0] for each programmed source burst. This offset is not including and is added to the programmed burst size when the completed burst is addressed in incremented mode (GPDMA_CxTR1.SINC = 1). Note: A source address offset must be aligned with the programmed data width of a source burst (SAO[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else a user setting error is reported and none transfer is issued. When the source block size is not a multiple of the destination burst size and is a multiple of the source data width, then the last programmed source burst is not completed and is internally shorten to match the block size. In this case, the additional GPDMA_CxTR3.SAO[12:0] is not applied.
bits : 0 - 12 (13 bit)
access : read-write
DAO : destination address offset increment The destination address, pointed by GPDMA_CxDAR, is incremented or decremented (depending on GPDMA_CxBR1.DDEC) by this offset DAO[12:0] for each programmed destination burst. This offset is not including and is added to the programmed burst size when the completed burst is addressed in incremented mode (GPDMA_CxTR1.DINC = 1). Note: A destination address offset must be aligned with the programmed data width of a destination burst (DAO[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued.
bits : 16 - 28 (13 bit)
access : read-write
GPDMA channel 15 block register 2
address_offset : 0x828 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
BRSAO : Block repeated source address offset For a channel with 2D addressing capability, this field is used to update (by addition or subtraction depending on GPDMA_CxBR1.BRSDEC) the current source address (GPDMA_CxSAR) at the end of a block transfer. Note: A block repeated source address offset must be aligned with the programmed data width of a source burst (BRSAO[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued.
bits : 0 - 15 (16 bit)
access : read-write
BRDAO : Block repeated destination address offset For a channel with 2D addressing capability, this field is used to update (by addition or subtraction depending on GPDMA_CxBR1.BRDDEC) the current destination address (GPDMA_CxDAR) at the end of a block transfer. Note: A block repeated destination address offset must be aligned with the programmed data width of a destination burst (BRDAO[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued.
bits : 16 - 31 (16 bit)
access : read-write
GPDMA channel 15 alternate linked-list address register
address_offset : 0x84C Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
LA : pointer (16-bit low-significant address) to the next linked-list data structure If UT1 = UT2 = UB1 = USA = UDA = ULL = 0 and if LA[15:20] = 0, the current LLI is the last one. The channel transfer is completed without any update of the linked-list GPDMA register file. Else, this field is the pointer to the memory address offset from which the next linked-list data structure is automatically fetched from, once the data transfer is completed, in order to conditionally update the linked-list GPDMA internal register file (GPDMA_CxCTR1, GPDMA_CxTR2, GPDMA_CxBR1, GPDMA_CxSAR, GPDMA_CxDAR and GPDMA_CxLLR). Note: The user must program the pointer to be 32-bit aligned. The two low-significant bits are write ignored.
bits : 2 - 15 (14 bit)
access : read-write
ULL : Update GPDMA_CxLLR register from memory This bit is used to control the update of GPDMA_CxLLR from the memory during the link transfer.
bits : 16 - 16 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxLLR update
0x1 : B_0x1
GPDMA_CxLLR update
End of enumeration elements list.
UB2 : Update GPDMA_CxBR2 from memory This bit controls the update of GPDMA_CxBR2 from the memory during the link transfer.
bits : 25 - 25 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxBR2 update
0x1 : B_0x1
GPDMA_CxBR2 update
End of enumeration elements list.
UT3 : Update GPDMA_CxTR3 from memory This bit controls the update of GPDMA_CxTR3 from the memory during the link transfer.
bits : 26 - 26 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR3 update
0x1 : B_0x1
GPDMA_CxTR3 update
End of enumeration elements list.
UDA : Update GPDMA_CxDAR register from memory This bit is used to control the update of GPDMA_CxDAR from the memory during the link transfer.
bits : 27 - 27 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxDAR update
0x1 : B_0x1
GPDMA_CxDAR update
End of enumeration elements list.
USA : update GPDMA_CxSAR from memory This bit controls the update of GPDMA_CxSAR from the memory during the link transfer.
bits : 28 - 28 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxSAR update
0x1 : B_0x1
GPDMA_CxSAR update
End of enumeration elements list.
UB1 : Update GPDMA_CxBR1 from memory This bit controls the update of GPDMA_CxBR1 from the memory during the link transfer. If UB1 = 0 and if GPDMA_CxLLR ≠ 0, the linked-list is not completed. GPDMA_CxBR1.BNDT[15:0] is then restored to the programmed value after data transfer is completed and before the link transfer.
bits : 29 - 29 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxBR1 update from memory (GPDMA_CxBR1.BNDT[15:0] restored if any link transfer)
0x1 : B_0x1
GPDMA_CxBR1 update
End of enumeration elements list.
UT2 : Update GPDMA_CxTR2 from memory This bit controls the update of GPDMA_CxTR2 from the memory during the link transfer.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR2 update
0x1 : B_0x1
GPDMA_CxTR2 update
End of enumeration elements list.
UT1 : Update GPDMA_CxTR1 from memory This bit controls the update of GPDMA_CxTR1 from the memory during the link transfer.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR1 update
0x1 : B_0x1
GPDMA_CxTR1 update
End of enumeration elements list.
GPDMA channel 0 transfer register 1
address_offset : 0x90 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SDW_LOG2 : binary logarithm of the source data width of a burst in bytes Note: Setting a 8-byte data width causes a user setting error to be reported and no transfer is issued. A source block size must be a multiple of the source data width (GPDMA_CxBR1.BNDT[2:0] versus SDW_LOG2[1:0]). Otherwise, a user setting error is reported and no transfer is issued. A source single transfer must have an aligned address with its data width (start address GPDMA_CxSAR[2:0] versus SDW_LOG2[1:0]). Otherwise, a user setting error is reported and none transfer is issued.
bits : 0 - 1 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
byte
0x1 : B_0x1
half-word (2 bytes)
0x2 : B_0x2
word (4 bytes)
0x3 : B_0x3
user setting error reported and no transfer issued
End of enumeration elements list.
SINC : source incrementing burst The source address, pointed by GPDMA_CxSAR, is kept constant after a burst beat/single transfer or is incremented by the offset value corresponding to a contiguous data after a burst beat/single transfer.
bits : 3 - 3 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
fixed burst
0x1 : B_0x1
contiguously incremented burst
End of enumeration elements list.
SBL_1 : source burst length minus 1, between 0 and 63 The burst length unit is one data named beat within a burst. If SBL_1[5:0] =0 , the burst can be named as single. Each data/beat has a width defined by the destination data width SDW_LOG2[1:0]. Note: If a burst transfer crossed a 1-Kbyte address boundary on a AHB transfer, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the AHB protocol. If a burst transfer is of length greater than the FIFO size of the channel x, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the FIFO size. Transfer performance is lower, with GPDMA re-arbitration between effective and lower bursts/singles, but the data integrity is guaranteed.
bits : 4 - 9 (6 bit)
access : read-write
PAM : padding/alignment mode If DDW_LOG2[1:0] = SDW_LOG2[1:0]: if the data width of a burst destination transfer is equal to the data width of a burst source transfer, these bits are ignored. Else: - Case 1: If destination data width > source data width 1x: successive source data are FIFO queued and packed at the destination data width, in a left (LSB) to right (MSB) order (named little endian), before a destination transfer - Case 2: If destination data width < source data width 1x: source data is FIFO queued and unpacked at the destination data width, to be transferred in a left (LSB) to right (MSB) order (named little endian) to the destination Note:
bits : 11 - 12 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
source data is transferred as right aligned, left-truncated down to the destination data width
0x1 : B_0x1
source data is transferred as left-aligned, right-truncated down to the destination data width
0x0 : B_0x0
source data is transferred as right aligned, left-truncated down to the destination data width
0x1 : B_0x1
source data is transferred as left-aligned, right-truncated down to the destination data width
End of enumeration elements list.
SBX : source byte exchange within the unaligned half-word of each source word If the source data width is shorter than a word, this bit is ignored. If the source data width is a word:
bits : 13 - 13 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no byte-based exchange within the unaligned half-word of each source word
0x1 : B_0x1
the two consecutive bytes within the unaligned half-word of each source word are exchanged.
End of enumeration elements list.
SAP : source allocated port This bit is used to allocate the master port for the source transfer Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 14 - 14 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
SSEC : security attribute of the GPDMA transfer from the source If GPDMA_SECCFGR.SECx = 1 and the access is secure: This is a secure register bit. This bit can only be read by a secure software. This bit must be written by a secure software when GPDMA_SECCFGR.SECx =1 . A secure write is ignored when GPDMA_SECCFGR.SECx = 0. When GPDMA_SECCFGR.SECx is de-asserted, this SSEC bit is also de-asserted by hardware (on a secure reconfiguration of the channel as non-secure), and the GPDMA transfer from the source is non-secure.
bits : 15 - 15 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
GPDMA transfer non-secure
0x1 : B_0x1
GPDMA transfer secure
End of enumeration elements list.
DDW_LOG2 : binary logarithm of the destination data width of a burst, in bytes Note: Setting a 8-byte data width causes a user setting error to be reported and none transfer is issued. A destination burst transfer must have an aligned address with its data width (start address GPDMA_CxDAR[2:0] and address offset GPDMA_CxTR3.DAO[2:0], versus DDW_LOG2[1:0]). Otherwise a user setting error is reported and no transfer is issued.
bits : 16 - 17 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
byte
0x1 : B_0x1
half-word (2 bytes)
0x2 : B_0x2
word (4 bytes)
0x3 : B_0x3
user setting error reported and no transfer issued
End of enumeration elements list.
DINC : destination incrementing burst The destination address, pointed by GPDMA_CxDAR, is kept constant after a burst beat/single transfer, or is incremented by the offset value corresponding to a contiguous data after a burst beat/single transfer.
bits : 19 - 19 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
fixed burst
0x1 : B_0x1
contiguously incremented burst
End of enumeration elements list.
DBL_1 : destination burst length minus 1, between 0 and 63 The burst length unit is one data named beat within a burst. If DBL_1[5:0] =0 , the burst can be named as single. Each data/beat has a width defined by the destination data width DDW_LOG2[1:0]. Note: If a burst transfer crossed a 1-Kbyte address boundary on a AHB transfer, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the AHB protocol. If a burst transfer is of length greater than the FIFO size of the channel x, the GPDMA modifies and shortens the programmed burst into singles or bursts of lower length, to be compliant with the FIFO size. Transfer performance is lower, with GPDMA re-arbitration between effective and lower bursts/singles, but the data integrity is guaranteed.
bits : 20 - 25 (6 bit)
access : read-write
DBX : destination byte exchange If the destination data size is a byte, this bit is ignored. If the destination data size is not a byte:
bits : 26 - 26 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no byte-based exchange within half-word
0x1 : B_0x1
the two consecutive (post PAM) bytes are exchanged in each destination half-word.
End of enumeration elements list.
DHX : destination half-word exchange If the destination data size is shorter than a word, this bit is ignored. If the destination data size is a word:
bits : 27 - 27 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no halfword-based exchanged within word
0x1 : B_0x1
the two consecutive (post PAM) half-words are exchanged in each destination word.
End of enumeration elements list.
DAP : destination allocated port This bit is used to allocate the master port for the destination transfer Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
DSEC : security attribute of the GPDMA transfer to the destination If GPDMA_SECCFGR.SECx = 1 and the access is secure: This is a secure register bit. This bit can only be read by a secure software. This bit must be written by a secure software when GPDMA_SECCFGR.SECx = 1. A secure write is ignored when GPDMA_SECCFGR.SECx = 0. When GPDMA_SECCFGR.SECx is de-asserted, this DSEC bit is also de-asserted by hardware (on a secure reconfiguration of the channel as non-secure), and the GPDMA transfer to the destination is non-secure.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
GPDMA transfer non-secure
0x1 : B_0x1
GPDMA transfer secure
End of enumeration elements list.
GPDMA channel 0 transfer register 2
address_offset : 0x94 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
REQSEL : GPDMA hardware request selection These bits are ignored if channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer). Else, the selected hardware request is internally taken into account as per . The user must not assign a same input hardware request (same REQSEL[6:0] value) to different active GPDMA channels (GPDMA_CxCR.EN = 1 and GPDMA_CxTR2.SWREQ = 0 for these channels). GPDMA is not intended to hardware support the case of simultaneous enabled channels incorrectly configured with a same hardware peripheral request signal, and there is no user setting error reporting.
bits : 0 - 6 (7 bit)
access : read-write
SWREQ : software request This bit is internally taken into account when GPDMA_CxCR.EN is asserted.
bits : 9 - 9 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no software request. The selected hardware request REQSEL[6:0] is taken into account.
0x1 : B_0x1
software request for a memory-to-memory transfer. The default selected hardware request as per REQSEL[6:0] is ignored.
End of enumeration elements list.
DREQ : destination hardware request This bit is ignored if channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer). Else: Note:
bits : 10 - 10 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
selected hardware request driven by a source peripheral (request signal taken into account by the GPDMA transfer scheduler over the source/read port)
0x1 : B_0x1
selected hardware request driven by a destination peripheral (request signal taken into account by the GPDMA transfer scheduler over the destination/write port)
End of enumeration elements list.
BREQ : Block hardware request If the channel x is activated (GPDMA_CxCR.EN asserted) with SWREQ = 1 (software request for a memory-to-memory transfer), this bit is ignored. Else:
bits : 11 - 11 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
the selected hardware request is driven by a peripheral with a hardware request/acknowledge protocol at a burst level.
0x1 : B_0x1
the selected hardware request is driven by a peripheral with a hardware request/acknowledge protocol at a block level (see ).
End of enumeration elements list.
TRIGM : trigger mode These bits define the transfer granularity for its conditioning by the trigger. If the channel x is enabled (GPDMA_CxCR.EN asserted) with TRIGPOL[1:0] = 00 or 11, these TRIGM[1:0] bits are ignored. Else, a GPDMA transfer is conditioned by at least one trigger hit: first burst read of a 2D/repeated block transfer is conditioned by one hit trigger. – If the peripheral is programmed as a source (DREQ = 0) of the LLI data transfer, each programmed burst read is conditioned. – If the peripheral is programmed as a destination (DREQ = 1) of the LLI data transfer, each programmed burst write is conditioned. The first memory burst read of a (possibly 2D/repeated) block, also named as the first ready FIFO-based source burst, is gated by the occurrence of both the hardware request and the first trigger hit. The GPDMA monitoring of a trigger for channel x is started when the channel is enabled/loaded with a new active trigger configuration: rising or falling edge on a selected trigger (TRIGPOL[1:0] = 01 or respectively TRIGPOL[1:0] = 10). The monitoring of this trigger is kept active during the triggered and uncompleted (data or link) transfer and if a new trigger is detected then, this hit is internally memorized to grant the next transfer, as long as the defined rising or falling edge is not modified, and the TRIGSEL[5:0] is not modified, and the channel is enabled. Transferring a next LLIn+1 that updates the GPDMA_CxTR2 with a new value for any of TRIGSEL[5:0] or TRIGPOL[1:0], resets the monitoring, trashing the memorized hit of the formerly defined LLIn trigger. After a first new trigger hitn+1 is memorized, if another second trigger hitn+2 is detected and if the hitn triggered transfer is still not completed, hitn+2 is lost and not memorized.memorized. A trigger overrun flag is reported (GPDMA_CxSR.TOF =1 ), and an interrupt is generated if enabled (GPDMA_CxCR.TOIE = 1). The channel is not automatically disabled by hardware due to a trigger overrun. Note: When the source block size is not a multiple of the source burst size and is a multiple of the source data width, then the last programmed source burst is not completed and is internally shorten to match the block size. In this case, if TRIGM[1:0] = 11 and (SWREQ =1 or (SWREQ = 0 and DREQ =0 )), the shortened burst transfer (by singles or/and by bursts of lower length) is conditioned once by the trigger. When the programmed destination burst is internally shortened by singles or/and by bursts of lower length (versus FIFO size, versus block size, 1-Kbyte boundary address crossing): if the trigger is conditioning the programmed destination burst (if TRIGM[1:0] = 11 and SWREQ = 0 and DREQ = 1), this shortened destination burst transfer is conditioned once by the trigger.
bits : 14 - 15 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at block level: the first burst read of each block transfer is conditioned by one hit trigger (channel x = 12 to 15, for each block if a 2D/repeated block is configured with GPDMA_CxBR1.BRC[10:0] ≠ 0).
0x1 : B_0x1
channel x = 0 to 11, same as 00 channel x=12 to 15, at 2D/repeated block level, the
0x2 : B_0x2
at link level: a LLI link transfer is conditioned by one hit trigger. The LLI data transfer (if any) is not conditioned.
0x3 : B_0x3
at programmed burst level: If SWREQ = 1, each programmed burst read is conditioned by one hit trigger. If SWREQ = 0, each programmed burst that is requested by the selected peripheral, is conditioned by one hit trigger.
End of enumeration elements list.
TRIGSEL : trigger event input selection These bits select the trigger event input of the GPDMA transfer (as per ), with an active trigger event if TRIGPOL[1:0] ≠ 00.
bits : 16 - 21 (6 bit)
access : read-write
TRIGPOL : trigger event polarity These bits define the polarity of the selected trigger event input defined by TRIGSEL[5:0].
bits : 24 - 25 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no trigger (masked trigger event)
0x1 : B_0x1
trigger on the rising edge
0x2 : B_0x2
trigger on the falling edge
0x3 : B_0x3
same as 00
End of enumeration elements list.
TCEM : transfer complete event mode These bits define the transfer granularity for the transfer complete and half transfer complete events generation. Note: If the initial LLI0 data transfer is null/void (directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] = 0), then neither the complete transfer event nor the half transfer event is generated. Note: If the initial LLI0 data transfer is null/void (directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] = 0), then neither the complete transfer event nor the half transfer event is generated. Note: If the initial LLI0 data transfer is null/void (i.e. directly programmed by the internal register file with GPDMA_CxBR1.BNDT[15:0] =0 ), then the half transfer event is not generated, and the transfer complete event is generated when is completed the loading of the LLI1.
bits : 30 - 31 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
at block level (when GPDMA_CxBR1.BNDT[15:0] = 0): the complete (and the half) transfer event is generated at the (respectively half of the) end of a block.
0x1 : B_0x1
channel x = 0 to 11, same as 00 channel x=12 to 15, at 2D/repeated block level (when GPDMA_CxBR1.BRC[10:0] = 0 and GPDMA_CxBR1.BNDT[15:0] = 0), the complete (and the half) transfer event is generated at the end (respectively half of the end) of the 2D/repeated block.
0x2 : B_0x2
at LLI level: the complete transfer event is generated at the end of the LLI transfer, including the update of the LLI if any. The half transfer event is generated at the half of the LLI data transfer (the LLI data transfer being a block transfer or a 2D/repeated block transfer for channel x = 12 to 15), if any data transfer.
0x3 : B_0x3
at channel level: the complete transfer event is generated at the end of the last LLI transfer. The half transfer event is generated at the half of the data transfer of the last LLI. The last LLI updates the link address GPDMA_CxLLR.LA[15:2] to zero and clears all the GPDMA_CxLLR update bits (UT1, UT2, UB1, USA, UDA and ULL, plus UT3 and UB2 if present). If the channel transfer is continuous/infinite, no event is generated.
End of enumeration elements list.
GPDMA channel 0 block register 1
address_offset : 0x98 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
BNDT : block number of data bytes to transfer from the source Block size transferred from the source. When the channel is enabled, this field becomes read-only and is decremented, indicating the remaining number of data items in the current source block to be transferred. BNDT[15:0] is programmed in number of bytes, maximum source block size is 64 Kbytes -1. Once the last data transfer is completed (BNDT[15:0] = 0): - if GPDMA_CxLLR.UB1 = 1, this field is updated by the LLI in the memory. - if GPDMA_CxLLR.UB1 = 0 and if there is at least one non null Uxx update bit, this field is internally restored to the programmed value. - if all GPDMA_CxLLR.Uxx = 0 and if GPDMA_CxLLR.LA[15:0] = 0, this field is internally restored to the programmed value (infinite/continuous last LLI). - if GPDMA_CxLLR = 0, this field is kept as zero following the last LLI data transfer. Note: A non-null source block size must be a multiple of the source data width (BNDT[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued. When configured in packing mode (GPDMA_CxTR1.PAM[1] = 1 and destination data width different from source data width), a non-null source block size must be a multiple of the destination data width (BNDT[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued.
bits : 0 - 15 (16 bit)
access : read-write
GPDMA channel 0 source address register
address_offset : 0x9C Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
SA : source address This field is the pointer to the address from which the next data is read. During the channel activity, depending on the source addressing mode (GPDMA_CxTR1.SINC), this field is kept fixed or incremented by the data width (GPDMA_CxTR1.SDW_LOG2[1:0]) after each single source data, reflecting the next address from which data is read. During the channel activity, this address is updated after each completed source burst, consequently to: the programmed source burst either in fixed addressing mode or in contiguous-data incremented mode. If contiguously incremented (GPDMA_CxTR1.SINC = 1), then the additional address offset value is the programmed burst size, as defined by GPDMA_CxTR1.SBL_1[5:0] and GPDMA_CxTR1.SDW_LOG2[21:0] the additional source incremented/decremented offset value as programmed by GPDMA_CxBR1.SDEC and GPDMA_CxTR3.SAO[12:0] once/if completed source block transfer, for a channel x with 2D addressing capability (x = 12 to 15). additional block repeat source incremented/decremented offset value as programmed by GPDMA_CxBR1.BRSDEC and GPDMA_CxBR2.BRSAO[15:0] In linked-list mode, after a LLI data transfer is completed, this register is automatically updated by GPDMA from the memory, provided the LLI is set with GPDMA_CxLLR.USA = 1. Note: A source address must be aligned with the programmed data width of a source single (SA[2:0] versus GPDMA_CxTR1.SDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued. When the source block size is not a multiple of the source burst size and is a multiple of the source data width, the last programmed source burst is not completed and is internally shorten to match the block size. In this case, the additional GPDMA_CxTR3.SAO[12:0] is not applied.
bits : 0 - 31 (32 bit)
access : read-write
GPDMA channel 0 destination address register
address_offset : 0xA0 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
DA : destination address This field is the pointer to the address from which the next data is written. During the channel activity, depending on the destination addressing mode (GPDMA_CxTR1.DINC), this field is kept fixed or incremented by the data width (GPDMA_CxTR1.DDW_LOG2[21:0]) after each single destination data, reflecting the next address from which data is written. During the channel activity, this address is updated after each completed destination burst, consequently to: the programmed destination burst either in fixed addressing mode or in contiguous-data incremented mode. If contiguously incremented (GPDMA_CxTR1.DINC = 1), then the additional address offset value is the programmed burst size, as defined by GPDMA_CxTR1.DBL_1[5:0] and GPDMA_CxTR1.DDW_LOG2[1:0] the additional destination incremented/decremented offset value as programmed by GPDMA_CxBR1.DDEC and GPDMA_CxTR3.DAO[12:0] once/if completed destination block transfer, for a channel x with 2D addressing capability (x = 12 to 15), the additional block repeat destination incremented/decremented offset value as programmed by GPDMA_CxBR1.BRDDEC and GPDMA_CxBR2.BRDAO[15:0] In linked-list mode, after a LLI data transfer is completed, this register is automatically updated by the GPDMA from the memory, provided the LLI is set with GPDMA_CxLLR.UDA = 1. Note: A destination address must be aligned with the programmed data width of a destination burst (DA[2:0] versus GPDMA_CxTR1.DDW_LOG2[1:0]). Else, a user setting error is reported and no transfer is issued.
bits : 0 - 31 (32 bit)
access : read-write
GPDMA non-secure masked interrupt status register
address_offset : 0xC Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
MIS0 : MIS0
bits : 0 - 0 (1 bit)
access : read-only
MIS1 : MIS1
bits : 1 - 1 (1 bit)
access : read-only
MIS2 : MIS2
bits : 2 - 2 (1 bit)
access : read-only
MIS3 : MIS3
bits : 3 - 3 (1 bit)
access : read-only
MIS4 : MIS4
bits : 4 - 4 (1 bit)
access : read-only
MIS5 : MIS5
bits : 5 - 5 (1 bit)
access : read-only
MIS6 : MIS6
bits : 6 - 6 (1 bit)
access : read-only
MIS7 : MIS7
bits : 7 - 7 (1 bit)
access : read-only
MIS8 : MIS8
bits : 8 - 8 (1 bit)
access : read-only
MIS9 : MIS9
bits : 9 - 9 (1 bit)
access : read-only
MIS10 : MIS10
bits : 10 - 10 (1 bit)
access : read-only
MIS11 : MIS11
bits : 11 - 11 (1 bit)
access : read-only
MIS12 : MIS12
bits : 12 - 12 (1 bit)
access : read-only
MIS13 : MIS13
bits : 13 - 13 (1 bit)
access : read-only
MIS14 : MIS14
bits : 14 - 14 (1 bit)
access : read-only
MIS15 : MIS15
bits : 15 - 15 (1 bit)
access : read-only
GPDMA channel 0 linked-list address register
address_offset : 0xCC Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
LA : pointer (16-bit low-significant address) to the next linked-list data structure If UT1 = UT2 = UB1 = USA = UDA = ULL = 0 and if LA[15:20] = 0, the current LLI is the last one. The channel transfer is completed without any update of the linked-list GPDMA register file. Else, this field is the pointer to the memory address offset from which the next linked-list data structure is automatically fetched from, once the data transfer is completed, in order to conditionally update the linked-list GPDMA internal register file (GPDMA_CxCTR1, GPDMA_CxTR2, GPDMA_CxBR1, GPDMA_CxSAR, GPDMA_CxDAR and GPDMA_CxLLR). Note: The user must program the pointer to be 32-bit aligned. The two low-significant bits are write ignored.
bits : 2 - 15 (14 bit)
access : read-write
ULL : Update GPDMA_CxLLR register from memory This bit is used to control the update of GPDMA_CxLLR from the memory during the link transfer.
bits : 16 - 16 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxLLR update
0x1 : B_0x1
GPDMA_CxLLR update
End of enumeration elements list.
UDA : Update GPDMA_CxDAR register from memory This bit is used to control the update of GPDMA_CxDAR from the memory during the link transfer.
bits : 27 - 27 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxDAR update
0x1 : B_0x1
GPDMA_CxDAR update
End of enumeration elements list.
USA : update GPDMA_CxSAR from memory This bit controls the update of GPDMA_CxSAR from the memory during the link transfer.
bits : 28 - 28 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxSAR update
0x1 : B_0x1
GPDMA_CxSAR update
End of enumeration elements list.
UB1 : Update GPDMA_CxBR1 from memory This bit controls the update of GPDMA_CxBR1 from the memory during the link transfer. If UB1 = 0 and if GPDMA_CxLLR ≠ 0, the linked-list is not completed. GPDMA_CxBR1.BNDT[15:0] is then restored to the programmed value after data transfer is completed and before the link transfer.
bits : 29 - 29 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxBR1 update from memory (GPDMA_CxBR1.BNDT[15:0] restored if any link transfer)
0x1 : B_0x1
GPDMA_CxBR1 update
End of enumeration elements list.
UT2 : Update GPDMA_CxTR2 from memory This bit controls the update of GPDMA_CxTR2 from the memory during the link transfer.
bits : 30 - 30 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR2 update
0x1 : B_0x1
GPDMA_CxTR2 update
End of enumeration elements list.
UT1 : Update GPDMA_CxTR1 from memory This bit controls the update of GPDMA_CxTR1 from the memory during the link transfer.
bits : 31 - 31 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
no GPDMA_CxTR1 update
0x1 : B_0x1
GPDMA_CxTR1 update
End of enumeration elements list.
GPDMA channel 1 linked-list base address register
address_offset : 0xD0 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
LBA : linked-list base address of GPDMA channel x
bits : 16 - 31 (16 bit)
access : read-write
GPDMA channel 1 flag clear register
address_offset : 0xDC Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
TCF : transfer complete flag clear
bits : 8 - 8 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding TCF flag cleared
End of enumeration elements list.
HTF : half transfer flag clear
bits : 9 - 9 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding HTF flag cleared
End of enumeration elements list.
DTEF : data transfer error flag clear
bits : 10 - 10 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding DTEF flag cleared
End of enumeration elements list.
ULEF : update link transfer error flag clear
bits : 11 - 11 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding ULEF flag cleared
End of enumeration elements list.
USEF : user setting error flag clear
bits : 12 - 12 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding USEF flag cleared
End of enumeration elements list.
SUSPF : completed suspension flag clear
bits : 13 - 13 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding SUSPF flag cleared
End of enumeration elements list.
TOF : trigger overrun flag clear
bits : 14 - 14 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no effect
0x1 : B_0x1
corresponding TOF flag cleared
End of enumeration elements list.
GPDMA channel 1 status register
address_offset : 0xE0 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
IDLEF : idle flag This idle flag is de-asserted by hardware when the channel is enabled (GPDMA_CxCR.EN = 1) with a valid channel configuration (no USEF to be immediately reported). This idle flag is asserted after hard reset or by hardware when the channel is back in idle state (in suspended or disabled state).
bits : 0 - 0 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
channel not in idle state
0x1 : B_0x1
channel in idle state
End of enumeration elements list.
TCF : transfer complete flag A transfer complete event is either a block transfer complete, a 2D/repeated block transfer complete, a LLI transfer complete including the upload of the next LLI if any, or the full linked-list completion, depending on the transfer complete event mode (GPDMA_CxTR2.TCEM[1:0]).
bits : 8 - 8 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no transfer complete event
0x1 : B_0x1
a transfer complete event occurred
End of enumeration elements list.
HTF : half transfer flag An half transfer event is either an half block transfer or an half 2D/repeated block transfer, depending on the transfer complete event mode (GPDMA_CxTR2.TCEM[1:0]). An half block transfer occurs when half of the bytes of the source block size (rounded up integer of GPDMA_CxBR1.BNDT[15:0]/2) has been transferred to the destination. An half 2D/repeated block transfer occurs when half of the repeated blocks (rounded up integer of (GPDMA_CxBR1.BRC[10:0]+1)/2)) has been transferred to the destination.
bits : 9 - 9 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no half transfer event
0x1 : B_0x1
an half transfer event occurred
End of enumeration elements list.
DTEF : data transfer error flag
bits : 10 - 10 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no data transfer error event
0x1 : B_0x1
a master bus error event occurred on a data transfer
End of enumeration elements list.
ULEF : update link transfer error flag
bits : 11 - 11 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no update link transfer error event
0x1 : B_0x1
a master bus error event occurred while updating a linked-list register from memory
End of enumeration elements list.
USEF : user setting error flag
bits : 12 - 12 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no user setting error event
0x1 : B_0x1
a user setting error event occurred
End of enumeration elements list.
SUSPF : completed suspension flag
bits : 13 - 13 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no completed suspension event
0x1 : B_0x1
a completed suspension event occurred
End of enumeration elements list.
TOF : trigger overrun flag
bits : 14 - 14 (1 bit)
access : read-only
Enumeration:
0x0 : B_0x0
no trigger overrun event
0x1 : B_0x1
a trigger overrun event occurred
End of enumeration elements list.
FIFOL : monitored FIFO level Number of available write beats in the FIFO, in units of the programmed destination data width (see GPDMA_CxTR1.DDW_LOG2[1:0], in units of bytes, half-words, or words). Note: After having suspended an active transfer, the user may need to read FIFOL[7:0], additionally to GPDMA_CxBR1.BDNT[15:0] and GPDMA_CxBR1.BRC[10:0], to know how many data have been transferred to the destination. Before reading, the user may wait for the transfer to be suspended (GPDMA_CxSR.SUSPF = 1).
bits : 16 - 23 (8 bit)
access : read-only
GPDMA channel 1 control register
address_offset : 0xE4 Bytes (0x0)
size : 32 bit
access : read-write
reset_value : 0x0
reset_Mask : 0x0
EN : enable Writing 1 into the field RESET (bit 1) causes the hardware to de-assert this bit, whatever is written into this bit 0. Else: this bit is de-asserted by hardware when there is a transfer error (master bus error or user setting error) or when there is a channel transfer complete (channel ready to be configured, e.g. if LSM=1 at the end of a single execution of the LLI). Else, this bit can be asserted by software. Writing 0 into this EN bit is ignored.
bits : 0 - 0 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
write: ignored, read: channel disabled
0x1 : B_0x1
write: enable channel, read: channel enabled
End of enumeration elements list.
RESET : reset This bit is write only. Writing 0 has no impact. Writing 1 implies the reset of the following: the FIFO, the channel internal state, SUSP and EN bits (whatever is written receptively in bit 2 and bit 0). The reset is effective when the channel is in steady state, meaning one of the following: - active channel in suspended state (GPDMA_CxSR.SUSPF = 1 and GPDMA_CxSR.IDLEF = GPDMA_CxCR.EN = 1) - channel in disabled state (GPDMA_CxSR.IDLEF = 1 and GPDMA_CxCR.EN = 0). After writing a RESET, to continue using this channel, the user must explicitly reconfigure the channel including the hardware-modified configuration registers (GPDMA_CxBR1, GPDMA_CxSAR and GPDMA_CxDAR) before enabling again the channel (see the programming sequence in ).
bits : 1 - 1 (1 bit)
access : write-only
Enumeration:
0x0 : B_0x0
no channel reset
0x1 : B_0x1
channel reset
End of enumeration elements list.
SUSP : suspend Writing 1 into the field RESET (bit 1) causes the hardware to de-assert this bit, whatever is written into this bit 2. Else: Software must write 1 in order to suspend an active channel i.e. a channel with an on-going GPDMA transfer over its master ports. The software must write 0 in order to resume a suspended channel, following the programming sequence detailed in .
bits : 2 - 2 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
write: resume channel, read: channel not suspended
0x1 : B_0x1
write: suspend channel, read: channel suspended.
End of enumeration elements list.
TCIE : transfer complete interrupt enable
bits : 8 - 8 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
HTIE : half transfer complete interrupt enable
bits : 9 - 9 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
DTEIE : data transfer error interrupt enable
bits : 10 - 10 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
ULEIE : update link transfer error interrupt enable
bits : 11 - 11 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
USEIE : user setting error interrupt enable
bits : 12 - 12 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
SUSPIE : completed suspension interrupt enable
bits : 13 - 13 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
TOIE : trigger overrun interrupt enable
bits : 14 - 14 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
interrupt disabled
0x1 : B_0x1
interrupt enabled
End of enumeration elements list.
LSM : Link step mode First the (possible 1D/repeated) block transfer is executed as defined by the current internal register file until GPDMA_CxBR1.BNDT[15:0] = 0 and GPDMA_CxBR1.BRC[10:0] = 0 if present. Secondly the next linked-list data structure is conditionally uploaded from memory as defined by GPDMA_CxLLR. Then channel execution is completed. Note: This bit must be written when EN=0. This bit is read-only when EN=1.
bits : 16 - 16 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
channel executed for the full linked-list and completed at the end of the last LLI (GPDMA_CxLLR = 0). The 16 low-significant bits of the link address are null (LA[15:0] = 0) and all the update bits are null (UT1 =UB1 = UT2 = USA = UDA = ULL = 0 and UT3 = UB2 = 0 if present). Then GPDMA_CxBR1.BNDT[15:0] = 0 and GPDMA_CxBR1.BRC[10:0] = 0 if present.
0x1 : B_0x1
channel executed once for the current LLI
End of enumeration elements list.
LAP : linked-list allocated port This bit is used to allocate the master port for the update of the GPDMA linked-list registers from the memory. Note: This bit must be written when EN=0. This bit is read-only when EN=1.
bits : 17 - 17 (1 bit)
access : read-write
Enumeration:
0x0 : B_0x0
port 0 (AHB) allocated
0x1 : B_0x1
port 1 (AHB) allocated
End of enumeration elements list.
PRIO : priority level of the channel x GPDMA transfer versus others Note: This bit must be written when EN = 0. This bit is read-only when EN = 1.
bits : 22 - 23 (2 bit)
access : read-write
Enumeration:
0x0 : B_0x0
low priority, low weight
0x1 : B_0x1
low priority, mid weight
0x2 : B_0x2
low priority, high weight
0x3 : B_0x3
high priority
End of enumeration elements list.
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