EFM32 Happy Gecko Software Documentation
efm32hg-doc-5.1.2
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Callback structure that can be used to define DMA complete actions.
A reference to this structure is only stored in the primary descriptor for a channel (if callback feature is used). If callback is required for both primary and alternate descriptor completion, this must be handled by one common callback, using the provided 'primary' parameter with the callback function.
#include <em_dma.h>
Data Fields | |
DMA_FuncPtr_TypeDef | cbFunc |
uint8_t | primary |
void * | userPtr |
DMA_FuncPtr_TypeDef DMA_CB_TypeDef::cbFunc |
Pointer to callback function to invoke when DMA transfer cycle done. Notice that this function is invoked in interrupt context, and therefore should be short and non-blocking.
Definition at line 155 of file em_dma.h.
Referenced by DMA_IRQHandler().
uint8_t DMA_CB_TypeDef::primary |
For internal use only: Indicates if next callback applies to primary or alternate descriptor completion. Mainly useful for ping-pong DMA cycles. Set this value to 0 prior to configuring callback handling.
Definition at line 165 of file em_dma.h.
Referenced by DMA_ActivateScatterGather(), and DMA_IRQHandler().
void* DMA_CB_TypeDef::userPtr |
User defined pointer to provide with callback function.
Definition at line 158 of file em_dma.h.
Referenced by DMA_IRQHandler().