746 Nucleo板子上添加UART初始化代码，不发生接收中断

davidwzn 提问时间：2017-10-18 11:03 /

问答
是否解决:

本帖最后由 david_wzn 于 2017-10-18 11:04 编辑

我在用746 Nucleo板子作串口实验，用下面这个工程：

D:\work\STM32CubeF7\STM32Cube_FW_F7_V1.7.0\Projects\STM32F746ZG-Nucleo\Examples\UART\UART_Printf\EWARM

uart初始化代码改成，我用UART3：

void HAL_UART_MspInit(UART_HandleTypeDef *huart)
{
  GPIO_InitTypeDef  GPIO_InitStruct;

  RCC_PeriphCLKInitTypeDef RCC_PeriphClkInit;

  /*##-1- Enable peripherals and GPIO Clocks #################################*/
  /* Enable GPIO TX/RX clock */
  USARTx_TX_GPIO_CLK_ENABLE();
  //USARTx_RX_GPIO_CLK_ENABLE();

  /* Select SysClk as source of USART1 clocks */
  RCC_PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART1;
  RCC_PeriphClkInit.Usart1ClockSelection = RCC_USART1CLKSOURCE_SYSCLK;
  HAL_RCCEx_PeriphCLKConfig(&RCC_PeriphClkInit);

  /* Enable USARTx clock */
  USARTx_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_VERY_HIGH;
  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);

  HAL_NVIC_SetPriority(USARTx_IRQn,0,1);
  HAL_NVIC_EnableIRQ(USARTx_IRQn);

}

在main文件中加了回调函数：
/**
  * @brief Rx Transfer completed callbacks
  * @param huart: uart handle
  * @retval None
  */
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
            UartReady = SET;
}

main（）函数里增加了接收判断函数；
UartHandle.Instance       = USARTx;

  UartHandle.Init.BaudRate = 9600;
  UartHandle.Init.WordLength = UART_WORDLENGTH_8B;
  UartHandle.Init.StopBits = UART_STOPBITS_1;
  UartHandle.Init.Parity    = UART_PARITY_ODD;
  UartHandle.Init.HwFlowCtl  = UART_HWCONTROL_NONE;
  UartHandle.Init.Mode    = UART_MODE_TX_RX;
  UartHandle.Init.OverSampling = UART_OVERSAMPLING_16;
  if (HAL_UART_Init(&UartHandle) != HAL_OK)
  {
/* Initialization Error */
Error_Handler();
  }
      printf("\n\r UART Printf Example: retarget the C library printf function to the UART\n\r");
  printf("** Test finished successfully. ** \n\r");
      UartReady = RESET;

      if( HAL_UART_Receive_IT(&UartHandle , aRxBuffer, 30) != HAL_OK)
      {
               Error_Handler();
      }
      UartReady = RESET;
      while (UartReady != SET)
      {
            BSP_LED_On(LED2);
            HAL_Delay(100);
            BSP_LED_Off(LED2);
            HAL_Delay(100);
            BSP_LED_On(LED2);
            HAL_Delay(100);
            BSP_LED_Off(LED2);
            HAL_Delay(500);
      }

      UartReady = RESET;
      BSP_LED_Off(LED2);

启动程序后，断点放在最后两行，无论用超级终端怎么发数据，都无法跳出上面的while 循环。

如果谁有 746Nucleo板子的中断方式发送和接收的工程，共享出来学习一下。谢谢！