/** * @brief UART MSP Initialization * This function configures the hardware resources used in this example: * - Peripheral's clock enable * - Peripheral's GPIO Configuration * - DMA configuration for transmission request by peripheral * - NVIC configuration for DMA interrupt request enable * @param huart: UART handle pointer * @retval None */ void HAL_UART_MspInit(UART_HandleTypeDef *huart) { static DMA_HandleTypeDef hdma_tx; GPIO_InitTypeDef GPIO_InitStruct; /*##-1- Enable peripherals and GPIO Clocks #################################*/ /* Enable GPIO clock */ USARTx_TX_GPIO_CLK_ENABLE(); USARTx_RX_GPIO_CLK_ENABLE(); /* Enable USARTx clock */ USARTx_CLK_ENABLE(); /* Enable DMA clock */ DMAx_CLK_ENABLE(); /*##-2- Configure peripheral GPIO ##########################################*/ /* UART TX GPIO pin configuration */ GPIO_InitStruct.Pin = USARTx_TX_PIN; GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; GPIO_InitStruct.Pull = GPIO_PULLUP; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH; HAL_GPIO_Init(USARTx_TX_GPIO_PORT, &GPIO_InitStruct); /* UART RX GPIO pin configuration */ GPIO_InitStruct.Pin = USARTx_RX_PIN; GPIO_InitStruct.Mode = GPIO_MODE_INPUT; HAL_GPIO_Init(USARTx_RX_GPIO_PORT, &GPIO_InitStruct); /*##-3- Configure the NVIC for UART ########################################*/ HAL_NVIC_SetPriority(USARTx_IRQn, 4, 0); HAL_NVIC_EnableIRQ(USARTx_IRQn); /*##-4- Configure the DMA channels ##########################################*/ /* Configure the DMA handler for Transmission process */ hdma_tx.Instance = USARTx_TX_DMA_STREAM; hdma_tx.Init.Direction = DMA_MEMORY_TO_PERIPH; hdma_tx.Init.PeriphInc = DMA_PINC_DISABLE; hdma_tx.Init.MemInc = DMA_MINC_ENABLE; hdma_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE; hdma_tx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE; hdma_tx.Init.Mode = DMA_NORMAL; hdma_tx.Init.Priority = DMA_PRIORITY_LOW; HAL_DMA_Init(&hdma_tx); /* Associate the initialized DMA handle to the UART handle */ __HAL_LINKDMA(huart, hdmatx, hdma_tx); /*##-5- Configure the NVIC for DMA #########################################*/ /* NVIC configuration for DMA transfer complete interrupt (USARTx_TX) */ HAL_NVIC_SetPriority(USARTx_DMA_TX_IRQn, 5, 0); HAL_NVIC_EnableIRQ(USARTx_DMA_TX_IRQn); /*##-6- Enable TIM peripherals Clock #######################################*/ TIMx_CLK_ENABLE(); /*##-7- Configure the NVIC for TIMx ########################################*/ /* Set Interrupt Group Priority */ HAL_NVIC_SetPriority(TIMx_IRQn, 5, 0); /* Enable the TIMx global Interrupt */ HAL_NVIC_EnableIRQ(TIMx_IRQn); }
/** * @brief UART MSP Initialization * This function configures the hardware resources used in this example: * - Peripheral's clock enable * - Peripheral's GPIO Configuration * - DMA configuration for transmission request by peripheral * - NVIC configuration for DMA interrupt request enable * @param huart: UART handle pointer * @retval None */ void HAL_UART_MspInit(UART_HandleTypeDef *huart) { static DMA_HandleTypeDef hdma_tx; static DMA_HandleTypeDef hdma_rx; GPIO_InitTypeDef GPIO_InitStruct; /*##-1- Enable peripherals and GPIO Clocks #################################*/ /* Enable GPIO clock */ USARTx_TX_GPIO_CLK_ENABLE(); USARTx_RX_GPIO_CLK_ENABLE(); /* Enable USARTx clock */ USARTx_CLK_ENABLE(); /* Enable DMA clock */ DMAx_CLK_ENABLE(); /*##-2- Configure peripheral GPIO ##########################################*/ /* UART TX GPIO pin configuration */ GPIO_InitStruct.Pin = USARTx_TX_PIN; GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; GPIO_InitStruct.Pull = GPIO_PULLUP; GPIO_InitStruct.Speed = GPIO_SPEED_FAST; GPIO_InitStruct.Alternate = USARTx_TX_AF; HAL_GPIO_Init(USARTx_TX_GPIO_PORT, &GPIO_InitStruct); /* UART RX GPIO pin configuration */ GPIO_InitStruct.Pin = USARTx_RX_PIN; GPIO_InitStruct.Alternate = USARTx_RX_AF; HAL_GPIO_Init(USARTx_RX_GPIO_PORT, &GPIO_InitStruct); /*##-3- Configure the DMA ##################################################*/ /* Configure the DMA handler for Transmission process */ hdma_tx.Instance = USARTx_TX_DMA_STREAM; hdma_tx.Init.Channel = USARTx_TX_DMA_CHANNEL; hdma_tx.Init.Direction = DMA_MEMORY_TO_PERIPH; hdma_tx.Init.PeriphInc = DMA_PINC_DISABLE; hdma_tx.Init.MemInc = DMA_MINC_ENABLE; hdma_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE; hdma_tx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE; hdma_tx.Init.Mode = DMA_NORMAL; hdma_tx.Init.Priority = DMA_PRIORITY_LOW; hdma_tx.Init.FIFOMode = DMA_FIFOMODE_DISABLE; hdma_tx.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL; hdma_tx.Init.MemBurst = DMA_MBURST_INC4; hdma_tx.Init.PeriphBurst = DMA_PBURST_INC4; HAL_DMA_Init(&hdma_tx); /* Associate the initialized DMA handle to the UART handle */ __HAL_LINKDMA(huart, hdmatx, hdma_tx); /* Configure the DMA handler for reception process */ hdma_rx.Instance = USARTx_RX_DMA_STREAM; hdma_rx.Init.Channel = USARTx_RX_DMA_CHANNEL; hdma_rx.Init.Direction = DMA_PERIPH_TO_MEMORY; hdma_rx.Init.PeriphInc = DMA_PINC_DISABLE; hdma_rx.Init.MemInc = DMA_MINC_ENABLE; hdma_rx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE; hdma_rx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE; hdma_rx.Init.Mode = DMA_NORMAL; hdma_rx.Init.Priority = DMA_PRIORITY_HIGH; hdma_rx.Init.FIFOMode = DMA_FIFOMODE_DISABLE; hdma_rx.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL; hdma_rx.Init.MemBurst = DMA_MBURST_INC4; hdma_rx.Init.PeriphBurst = DMA_PBURST_INC4; HAL_DMA_Init(&hdma_rx); /* Associate the initialized DMA handle to the the UART handle */ __HAL_LINKDMA(huart, hdmarx, hdma_rx); /*##-4- Configure the NVIC for DMA #########################################*/ /* NVIC configuration for DMA transfer complete interrupt (USARTx_TX) */ HAL_NVIC_SetPriority(USARTx_DMA_TX_IRQn, 0, 1); HAL_NVIC_EnableIRQ(USARTx_DMA_TX_IRQn); /* NVIC configuration for DMA transfer complete interrupt (USARTx_RX) */ HAL_NVIC_SetPriority(USARTx_DMA_RX_IRQn, 0, 0); HAL_NVIC_EnableIRQ(USARTx_DMA_RX_IRQn); /* NVIC configuration for USART, to catch the TX complete */ HAL_NVIC_SetPriority(USARTx_IRQn, 0, 1); HAL_NVIC_EnableIRQ(USARTx_IRQn); }