STM32_MDMA_CTCR
stm32_mdma_read(dmadev, STM32_MDMA_CTCR(chan->id)));
stm32_mdma_write(dmadev, STM32_MDMA_CTCR(id), hwdesc->ctcr);
ctcr = stm32_mdma_read(dmadev, STM32_MDMA_CTCR(chan->id));
ctcr = stm32_mdma_read(dmadev, STM32_MDMA_CTCR(chan->id));