diff options
| -rw-r--r-- | ports/stm32/dma.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/ports/stm32/dma.c b/ports/stm32/dma.c index d4b41771b..de3088691 100644 --- a/ports/stm32/dma.c +++ b/ports/stm32/dma.c @@ -1120,6 +1120,36 @@ void dma_nohal_init(const dma_descr_t *descr, uint32_t config) { init->FIFOMode // DMDIS | init->FIFOThreshold // FTH ; + + #if defined(STM32H7) + // Configure DMAMUX + uint32_t request = descr->sub_instance & DMAMUX_CxCR_DMAREQ_ID; + if ((dma >= DMA1_Stream0 && dma <= DMA1_Stream7) || (dma >= DMA2_Stream0 && dma <= DMA2_Stream7)) { + // DMA1/2 channels 0 to 7 are hardwired to DMAMUX1 channels 0-15. + uint32_t stream = (((uint32_t)dma & 0xff) - 16) / 24 + ((dma >= DMA2_Stream0) ? 8 : 0); + // Set DMAMUX channel peripheral request. + ((DMAMUX_Channel_TypeDef *)(((uint32_t)DMAMUX1_Channel0) + (stream * 4)))->CCR = request; + DMAMUX1_ChannelStatus->CFR = 1 << (stream & 0x1F); + // Configure DMAMUX request generator if needed. + if (request >= DMA_REQUEST_GENERATOR0 && request <= DMA_REQUEST_GENERATOR7) { + ((DMAMUX_RequestGen_TypeDef *)(((uint32_t)DMAMUX1_RequestGenerator0) + ((request - 1) * 4)))->RGCR = 0; + DMAMUX1_RequestGenStatus->RGCFR = 1 << (request - 1); + } + #if ENABLE_BDMA // TODO: BDMA is Not currently supported by this driver. + } else if (dma >= BDMA_Channel0 && dma <= BDMA_Channel7) { + // BDMA channels 0 to 7 are hardwired to DMAMUX2 channels 0-7. + uint32_t stream = (((uint32_t)dma & 0xff) - 8) / 20; + // Set DMAMUX channel peripheral request. + ((DMAMUX_Channel_TypeDef *)(((uint32_t)DMAMUX2_Channel0) + (stream * 4)))->CCR = request; + DMAMUX2_ChannelStatus->CFR = 1 << (stream & 0x1F); + // Configure DMAMUX request generator if needed. + if (request >= DMA_REQUEST_GENERATOR0 && request <= DMA_REQUEST_GENERATOR7) { + ((DMAMUX_RequestGen_TypeDef *)(((uint32_t)DMAMUX2_RequestGenerator0) + ((request - 1) * 4)))->RGCR = 0; + DMAMUX2_RequestGenStatus->RGCFR = 1 << (request - 1); + } + #endif // ENABLE_BDMA + } + #endif // STM32H7 } void dma_nohal_deinit(const dma_descr_t *descr) { |