DMA_CfgDescrSGAlt_TypeDef Struct Reference
Configuration structure for alternate scatter-gather descriptor.
#include <em_dma.h>
Data Fields |
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| void * | src |
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Pointer to location to transfer data from.
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| void * | dst |
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Pointer to location to transfer data to.
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| DMA_DataInc_TypeDef | dstInc |
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Destination increment size for each DMA transfer.
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| DMA_DataInc_TypeDef | srcInc |
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Source increment size for each DMA transfer.
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| DMA_DataSize_TypeDef | size |
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DMA transfer unit size.
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| DMA_ArbiterConfig_TypeDef | arbRate |
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Arbitration rate, i.e., number of DMA transfers done before re-arbitration takes place.
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| uint16_t | nMinus1 |
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Number of DMA transfers minus 1 to do.
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| uint8_t | hprot |
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HPROT signal state, refer to reference manual, DMA chapter for further details.
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| bool | peripheral |
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Specify if a memory or peripheral scatter-gather DMA cycle.
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Configuration structure for alternate scatter-gather descriptor.
Field Documentation
◆ src
| void* DMA_CfgDescrSGAlt_TypeDef::src |
Pointer to location to transfer data from.
◆ dst
| void* DMA_CfgDescrSGAlt_TypeDef::dst |
Pointer to location to transfer data to.
◆ dstInc
| DMA_DataInc_TypeDef DMA_CfgDescrSGAlt_TypeDef::dstInc |
Destination increment size for each DMA transfer.
◆ srcInc
| DMA_DataInc_TypeDef DMA_CfgDescrSGAlt_TypeDef::srcInc |
Source increment size for each DMA transfer.
◆ size
| DMA_DataSize_TypeDef DMA_CfgDescrSGAlt_TypeDef::size |
DMA transfer unit size.
◆ arbRate
| DMA_ArbiterConfig_TypeDef DMA_CfgDescrSGAlt_TypeDef::arbRate |
Arbitration rate, i.e., number of DMA transfers done before re-arbitration takes place.
◆ nMinus1
| uint16_t DMA_CfgDescrSGAlt_TypeDef::nMinus1 |
Number of DMA transfers minus 1 to do.
Must be <= 1023.
◆ hprot
| 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.
◆ peripheral
| 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.
- true - this is a peripheral scatter-gather cycle.
- false - this is a memory scatter-gather cycle.