예제 #1
0
void serial_init(serial_t *obj, PinName tx, PinName rx) {
    // Determine the UART to use (UART_1, UART_2, ...)
    UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX);
    UARTName uart_rx = (UARTName)pinmap_peripheral(rx, PinMap_UART_RX);

    // Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object
    obj->uart = (UARTName)pinmap_merge(uart_tx, uart_rx);
    MBED_ASSERT(obj->uart != (UARTName)NC);

    // Enable USART clock
    if (obj->uart == UART_1) {
        __USART1_CLK_ENABLE();
        obj->index = 0;
    }

#if defined USART2_BASE
    if (obj->uart == UART_2) {
        __USART2_CLK_ENABLE();
        obj->index = 1;
    }
#endif

#if defined USART3_BASE
    if (obj->uart == UART_3) {
        __USART3_CLK_ENABLE();
        obj->index = 2;
    }
#endif

#if defined USART4_BASE
    if (obj->uart == UART_4) {
        __USART4_CLK_ENABLE();
        obj->index = 3;
    }
#endif

#if defined USART5_BASE
    if (obj->uart == UART_5) {
        __USART5_CLK_ENABLE();
        obj->index = 4;
    }
#endif

#if defined USART6_BASE
    if (obj->uart == UART_6) {
        __USART6_CLK_ENABLE();
        obj->index = 5;
    }
#endif

#if defined USART7_BASE
    if (obj->uart == UART_7) {
        __USART7_CLK_ENABLE();
        obj->index = 6;
    }
#endif

#if defined USART8_BASE
    if (obj->uart == UART_8) {
        __USART8_CLK_ENABLE();
        obj->index = 7;
    }
#endif

    // Configure the UART pins
    pinmap_pinout(tx, PinMap_UART_TX);
    pinmap_pinout(rx, PinMap_UART_RX);
    if (tx != NC) {
        pin_mode(tx, PullUp);
    }
    if (rx != NC) {
        pin_mode(rx, PullUp);
    }

    // Configure UART
    obj->baudrate = 9600;
    obj->databits = UART_WORDLENGTH_8B;
    obj->stopbits = UART_STOPBITS_1;
    obj->parity   = UART_PARITY_NONE;

    obj->pin_tx = tx;
    obj->pin_rx = rx;

    init_uart(obj);

    // For stdio management
    if (obj->uart == STDIO_UART) {
        stdio_uart_inited = 1;
        memcpy(&stdio_uart, obj, sizeof(serial_t));
    }
}
/**
  * @brief UART MSP Initialization 
  *        This function configures the hardware resources used in this example: 
  *           - Peripheral's clock enable
  *           - Peripheral's GPIO Configuration  
  *           - NVIC configuration for UART interrupt request enable
  * @param huart: UART handle pointer
  * @retval None
  */
void HAL_UART_MspInit(UART_HandleTypeDef *huart)
{  
  GPIO_InitTypeDef  GPIO_InitStruct;
  
  switch((uint32_t)huart->Instance)
  {
  case (uint32_t)USART1 :
    {
      /*##-1- Enable peripherals and GPIO Clocks #################################*/
      /* Enable GPIO TX/RX clock */
      __GPIOA_CLK_ENABLE();
      /* Enable USARTx clock */
      __USART1_CLK_ENABLE(); 
      
      /*##-2- Configure peripheral GPIO ##########################################*/  
      /* UART TX GPIO pin configuration  */
      GPIO_InitStruct.Pin       = GPIO_PIN_9 | GPIO_PIN_10;
      GPIO_InitStruct.Mode      = GPIO_MODE_AF_PP;
      GPIO_InitStruct.Pull      = GPIO_PULLUP;
      GPIO_InitStruct.Speed     = GPIO_SPEED_HIGH;
      GPIO_InitStruct.Alternate = GPIO_AF1_USART1;
      HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
      
      /*##-3- Configure the NVIC for UART ########################################*/
      /* NVIC for USART */
      HAL_NVIC_SetPriority(USART1_IRQn, 1, 0);
      HAL_NVIC_EnableIRQ(USART1_IRQn);
    }
    break;
  case (uint32_t)USART2 :
    {
      /*##-1- Enable peripherals and GPIO Clocks #################################*/
      /* Enable GPIO TX/RX clock */
      __GPIOD_CLK_ENABLE();
      /* Enable USARTx clock */
      __USART2_CLK_ENABLE(); 
      
      /*##-2- Configure peripheral GPIO ##########################################*/  
      /* UART TX GPIO pin configuration  */
      GPIO_InitStruct.Pin       = GPIO_PIN_6 | GPIO_PIN_5;
      GPIO_InitStruct.Mode      = GPIO_MODE_AF_PP;
      GPIO_InitStruct.Pull      = GPIO_PULLUP;
      GPIO_InitStruct.Speed     = GPIO_SPEED_HIGH;
      GPIO_InitStruct.Alternate = GPIO_AF0_USART2;
      
      HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
      
      /*##-3- Configure the NVIC for UART ########################################*/
      /* NVIC for USART */
      HAL_NVIC_SetPriority(USART2_IRQn, 1, 0);
      HAL_NVIC_EnableIRQ(USART2_IRQn);
    }
    break;
  case (uint32_t)USART3 :
    {
      /*##-1- Enable peripherals and GPIO Clocks #################################*/
      /* Enable GPIO TX/RX clock */
      __GPIOD_CLK_ENABLE();
      /* To allow the IT source identification */
      __SYSCFG_CLK_ENABLE();      
      /* Enable USARTx clock */
      __USART3_CLK_ENABLE(); 
      
      /*##-2- Configure peripheral GPIO ##########################################*/  
      /* UART TX GPIO pin configuration  */
      GPIO_InitStruct.Pin       = GPIO_PIN_8 | GPIO_PIN_9;
      GPIO_InitStruct.Mode      = GPIO_MODE_AF_PP;
      GPIO_InitStruct.Pull      = GPIO_PULLUP;
      GPIO_InitStruct.Speed     = GPIO_SPEED_HIGH;
      GPIO_InitStruct.Alternate = GPIO_AF0_USART3;
      HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
      
      /*##-3- Configure the NVIC for UART ########################################*/
      /* NVIC for USART */
      HAL_NVIC_SetPriority(USART3_8_IRQn, 0, 0);
      HAL_NVIC_EnableIRQ(USART3_8_IRQn);
    }
    break;
  case (uint32_t)USART4 :
    {
      /*##-1- Enable peripherals and GPIO Clocks #################################*/
      /* Enable GPIO TX/RX clock */
      __GPIOC_CLK_ENABLE();
      /* To allow the IT source identification */
      __SYSCFG_CLK_ENABLE();
      
      /* Enable USARTx clock */
      __USART4_CLK_ENABLE(); 
      
      /*##-2- Configure peripheral GPIO ##########################################*/  
      /* UART TX GPIO pin configuration  */
      GPIO_InitStruct.Pin       = GPIO_PIN_10 | GPIO_PIN_11;
      GPIO_InitStruct.Mode      = GPIO_MODE_AF_PP;
      GPIO_InitStruct.Pull      = GPIO_PULLUP;
      GPIO_InitStruct.Speed     = GPIO_SPEED_HIGH;
      GPIO_InitStruct.Alternate = GPIO_AF0_USART4;
      HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

      /*##-3- Configure the NVIC for UART ########################################*/
      /* NVIC for USART */
      HAL_NVIC_SetPriority(USART3_8_IRQn, 0, 0);
      HAL_NVIC_EnableIRQ(USART3_8_IRQn);
    }
    break;
  case (uint32_t)USART5 :
    {
      /*##-1- Enable peripherals and GPIO Clocks #################################*/
      /* Enable GPIO TX/RX clock */
      __GPIOB_CLK_ENABLE();
      /* To allow the IT source identification */
      __SYSCFG_CLK_ENABLE();      
      /* Enable USARTx clock */
      __USART5_CLK_ENABLE(); 
      
      /*##-2- Configure peripheral GPIO ##########################################*/  
      /* UART TX GPIO pin configuration  */
      GPIO_InitStruct.Pin       = GPIO_PIN_3 | GPIO_PIN_4;
      GPIO_InitStruct.Mode      = GPIO_MODE_AF_PP;
      GPIO_InitStruct.Pull      = GPIO_PULLUP;
      GPIO_InitStruct.Speed     = GPIO_SPEED_HIGH;
      GPIO_InitStruct.Alternate = GPIO_AF4_USART5;
      HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
      
      /*##-3- Configure the NVIC for UART ########################################*/
      /* NVIC for USART */
      HAL_NVIC_SetPriority(USART3_8_IRQn, 0, 0);
      HAL_NVIC_EnableIRQ(USART3_8_IRQn);
    }
    break;
  case (uint32_t)USART6 :
    {
      /*##-1- Enable peripherals and GPIO Clocks #################################*/
      /* Enable GPIO TX/RX clock */
      __GPIOF_CLK_ENABLE();
      /* To allow the IT source identification */
      __SYSCFG_CLK_ENABLE();      
      /* Enable USARTx clock */
      __USART6_CLK_ENABLE(); 
      
      /*##-2- Configure peripheral GPIO ##########################################*/  
      /* UART TX GPIO pin configuration  */
      GPIO_InitStruct.Pin       = GPIO_PIN_9 | GPIO_PIN_10;
      GPIO_InitStruct.Mode      = GPIO_MODE_AF_PP;
      GPIO_InitStruct.Pull      = GPIO_PULLUP;
      GPIO_InitStruct.Speed     = GPIO_SPEED_HIGH;
      GPIO_InitStruct.Alternate = GPIO_AF1_USART6;  
      HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);
      
      /*##-3- Configure the NVIC for UART ########################################*/
      /* NVIC for USART */
      HAL_NVIC_SetPriority(USART3_8_IRQn, 0, 0);
      HAL_NVIC_EnableIRQ(USART3_8_IRQn);
    }
    break;
  case (uint32_t)USART7 :
    {
      /*##-1- Enable peripherals and GPIO Clocks #################################*/
      /* Enable GPIO TX/RX clock */
      __GPIOF_CLK_ENABLE();
      /* To allow the IT source identification */
      __SYSCFG_CLK_ENABLE();
      /* Enable USARTx clock */
      __USART7_CLK_ENABLE(); 
      
      /*##-2- Configure peripheral GPIO ##########################################*/  
      /* UART TX GPIO pin configuration  */
      GPIO_InitStruct.Pin       = GPIO_PIN_3 | GPIO_PIN_2;
      GPIO_InitStruct.Mode      = GPIO_MODE_AF_PP;
      GPIO_InitStruct.Pull      = GPIO_PULLUP;
      GPIO_InitStruct.Speed     = GPIO_SPEED_HIGH;
      GPIO_InitStruct.Alternate = GPIO_AF1_USART7;
      HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);
      
      /*##-3- Configure the NVIC for UART ########################################*/
      /* NVIC for USART */
      HAL_NVIC_SetPriority(USART3_8_IRQn, 0, 0);
      HAL_NVIC_EnableIRQ(USART3_8_IRQn);
    }
    break;
  case (uint32_t)USART8 :
    {
      /*##-1- Enable peripherals and GPIO Clocks #################################*/
      /* Enable GPIO TX/RX clock */
      __GPIOC_CLK_ENABLE();
      /* To allow the IT source identification */
      __SYSCFG_CLK_ENABLE();      
      /* Enable USARTx clock */
      __USART8_CLK_ENABLE(); 
      
      /*##-2- Configure peripheral GPIO ##########################################*/  
      /* UART TX GPIO pin configuration  */
      GPIO_InitStruct.Pin       = GPIO_PIN_8 | GPIO_PIN_9;
      GPIO_InitStruct.Mode      = GPIO_MODE_AF_PP;
      GPIO_InitStruct.Pull      = GPIO_PULLUP;
      GPIO_InitStruct.Speed     = GPIO_SPEED_HIGH;
      GPIO_InitStruct.Alternate = GPIO_AF1_USART8;     
      HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
      
      /*##-3- Configure the NVIC for UART ########################################*/
      /* NVIC for USART */
      HAL_NVIC_SetPriority(USART3_8_IRQn, 1, 0);
      HAL_NVIC_EnableIRQ(USART3_8_IRQn);
    }
    break;
  }
}