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stm32/dma: Move FCR configuration to acquire function

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The FCR register content might change during mem-to-mem DMA transfers,
Forcing it back in the acquire should be sufficient to ensure proper
operations.
This commit is contained in:
Koen Zandberg 2020-05-15 13:24:55 +02:00
parent d7b1b7fc7c
commit 977d227213
No known key found for this signature in database
GPG Key ID: 0895A893E6D2985B
1 changed files with 6 additions and 1 deletions
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7
cpu/stm32/periph/dma.c
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@ -327,8 +327,14 @@ int dma_transfer(dma_t dma, int chan, const volatile void *src, volatile void *d
void dma_acquire(dma_t dma)
{
assert(dma < DMA_NUMOF);
int stream_n = dma_config[dma].stream;
mutex_lock(&dma_ctx[dma].conf_lock);
#if CPU_FAM_STM32F2 || CPU_FAM_STM32F4 || CPU_FAM_STM32F7
stream->FCR = 0;
#endif
#ifdef STM32_PM_STOP
/* block STOP mode */
pm_block(STM32_PM_STOP);
@ -388,7 +394,6 @@ int dma_configure(dma_t dma, int chan, const volatile void *src, volatile void *
/* Enable interrupts */
stream->CR |= DMA_SxCR_TCIE | DMA_SxCR_TEIE;
/* Configure FIFO */
stream->FCR = 0;
#else
#if defined(DMA_CSELR_C1S) || defined(DMA1_CSELR_DEFAULT)
dma_req(stream_n)->CSELR &= ~((0xF) << ((stream_n & 0x7) << 2));