coldcard/micropython
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

stm32/dma: STM32L4: always deinit/reinit DMA channels

Browse Source
This commit is contained in:
Peter D. Gray 2018-04-13 09:14:44 -04:00
parent b8a5167517
commit f826f6172b
1 changed files with 8 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
ports/stm32/dma.c
View File

@ -498,6 +498,7 @@ void dma_init(DMA_HandleTypeDef *dma, const dma_descr_t *dma_descr, void *data){
dma_enable_clock(dma_id);
#if !defined(STM32L4)
// if this stream was previously configured for this channel/request then we
// can skip most of the initialisation
uint8_t sub_inst = DMA_SUB_INSTANCE_AS_UINT8(dma_descr->sub_instance);
@ -524,6 +525,13 @@ void dma_init(DMA_HandleTypeDef *dma, const dma_descr_t *dma_descr, void *data){
dma->ChannelIndex = (((uint32_t)dma->Instance - (uint32_t)dma->DmaBaseAddress) /20)*4;
#endif
}
#else
// ALWAYS reset and configure DMA peripheral
// (dma->State is set to HAL_DMA_STATE_RESET by memset above)
HAL_DMA_DeInit(dma);
HAL_DMA_Init(dma);
HAL_NVIC_SetPriority(dma_irqn[dma_id], IRQ_PRI_DMA, IRQ_SUBPRI_DMA);
#endif
HAL_NVIC_EnableIRQ(dma_irqn[dma_id]);
}