Configuration structure for alternate scatter-gather descriptor.

Definition at line 258 of file em_dma.h .

#include < em_dma.h >

Data Fields
DMA_ArbiterConfig_TypeDef	arbRate

void *	dst

DMA_DataInc_TypeDef	dstInc

uint8_t	hprot

uint16_t	nMinus1

bool	peripheral

DMA_DataSize_TypeDef	size

void *	src

DMA_DataInc_TypeDef	srcInc

Field Documentation

DMA_ArbiterConfig_TypeDef DMA_CfgDescrSGAlt_TypeDef::arbRate

Arbitration rate, i.e., number of DMA transfers done before re-arbitration takes place.

Definition at line 278 of file em_dma.h .

Referenced by DMA_CfgDescrScatterGather() .

void* DMA_CfgDescrSGAlt_TypeDef::dst

Pointer to location to transfer data to.

Definition at line 263 of file em_dma.h .

Referenced by DMA_CfgDescrScatterGather() .

DMA_DataInc_TypeDef DMA_CfgDescrSGAlt_TypeDef::dstInc

Destination increment size for each DMA transfer.

Definition at line 266 of file em_dma.h .

Referenced by DMA_CfgDescrScatterGather() .

uint8_t DMA_CfgDescrSGAlt_TypeDef::hprot

HPROT signal state, refer to reference manual, DMA chapter for further details. Normally set to 0 if protection is not an issue. The following bits are available:

bit 0 - HPROT[1] control for source read accesses, privileged/non-privileged access.
bit 3 - HPROT[1] control for destination write accesses, privileged/non-privileged access.

Definition at line 292 of file em_dma.h .

Referenced by DMA_CfgDescrScatterGather() .

uint16_t DMA_CfgDescrSGAlt_TypeDef::nMinus1

Number of DMA transfers minus 1 to do. Must be <= 1023.

Definition at line 281 of file em_dma.h .

Referenced by DMA_CfgDescrScatterGather() .

bool DMA_CfgDescrSGAlt_TypeDef::peripheral

Specify if a memory or peripheral scatter-gather DMA cycle. Notice that this parameter should be the same for all alternate descriptors.