HAL_DMA_Start_IT(huart->hdmarx, (uint32_t)&huart->Instance->DR, *(uint32_t *)tmp, Size); /* Clear the Overrun flag just before enabling the DMA Rx request: can be mandatory for the second transfer */ __HAL_UART_CLEAR_OREFLAG(huart); /* Process Unlocked */ __HAL_UNLOCK(h...
0:S/W request mode, DMA is triggered by setting SW_TRIG bit of DMASKTRIG control register 1:DMA source selected by bit[26:24] triggers the DMA operation service mode:DCON[27] 0:single service mode,一次DMA请求完成一次原子操作,等待下一次请求 1:whole service mode,一次DMA请求完成一批原子操作...
(huart->Instance->CR1, USART_CR1_PEIE); } /* Enable the UART Error Interrupt: (Frame error, noise error, overrun error) */ ATOMIC_SET_BIT(huart->Instance->CR3, USART_CR3_EIE); /* Enable the DMA transfer for the receiver request by setting the DMAR bit in the UART CR3 register ...
Enable capture from the counter into the capture register by setting the CC1E bit in the TIMx_CCER register. If needed, enable the related interrupt request by setting the CC1IE bit in the TIMx_DIER register, and/or the DMA request by setting the CC1DE bit in the TIMx_DIER...
1. Firstly, I am setting the 'Data Rate (kbps)' in the SCB in slave mode to be 16384. Shouldn't this be sufficient to determine the clock that operates the SCB? I dont understand why we need to specify another that drives the block. Also what value should I set the block clock to...
* @arg USART_DMAReq_Rx: USART DMA receive request * @param NewState: new state of the DMA Request sources. * This parameter can be: ENABLE or DISABLE. * @retval None */ void USART_DMACmd(USART_TypeDef* USARTx, uint16_t USART_DMAReq, FunctionalState NewState) ...
26.4.19 DMA All eTMRssupport DMA, this function is enabled by setting CH_CTRL[DMAEN]=1. The DMA request is generated when STS[CHxF]=1. The DMA request is cleared by clearing STS[CHxF]. The DMA priority is higher than the interrupt. ...
/* Enable the DMA transfer for the receiver request by setting the DMAR bit in the UART CR3 register */ ATOMIC_SET_BIT(huart->Instance->CR3, USART_CR3_DMAR); return HAL_OK; } UART_Start_Receive_DMA(huart, pData, Size) 在接收数组缓存到达数组一半时,会执行下面此函数: ...
添加DMA Request:添加ADC1为DMA Reuest,Channel为DMA1 Channel 1,DMA的数据传输方向为:peripheral To Memory(外设到内存),Priori为Low。 配置DMA Requeset Settings: Mode:Circular。表示DMA循环、连续采集各个ADC通道的模拟量。 Data Width为Word。表示DMA传输的数据的基本大小为Word,即四字节。
hdma_tx.Init.FIFOMode = DMA_FIFOMODE_DISABLE; hdma_tx.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL; hdma_tx.Init.MemBurst = DMA_MBURST_SINGLE; hdma_tx.Init.PeriphBurst = DMA_PBURST_SINGLE; hdma_tx.Init.Request = DMA_REQUEST_SPI4_TX; ...