Ejemplo n.º 1
0
/**
  * @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);
}
Ejemplo n.º 2
0
/**
  * @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);
}