STM32F101系列串口发送中断进不来是为什么

只看该作者 · 2008-12-18 22:43

在IAR环境下，基于STM32F101 Cotex-M3系列芯片开发时，遇到串口发送中断进不来，接收中断是正常的，但发送中断就是进不来，很奇怪，我都配好了，就是在发送一个字节时，进不了中断，不知道为什么，有没有哪个大哥遇到类似情况，给小弟解下困惑。

1万 · 2008-12-19 09:43

只看该作者 · 2008-12-19 16:53

void USART1_IRQHandler(void)//串口中断
{
  if(USART_GetITStatus(USART1, USART_IT_TXE) != RESET)
  {
    /* Write one byte to the transmit data register */
    if(TxCounter1 < NbrOfDataToTransfer1)
    USART_SendData(USART1, TxBuffer1[TxCounter1++]);

    /* Clear the USART1 transmit interrupt */
    USART_ClearITPendingBit(USART1, USART_IT_TXE);

    if(TxCounter1 == NbrOfDataToTransfer1)
    {
      /* Disable the USART1 Transmit interrupt */
      USART_ITConfig(USART1, USART_IT_TXE, DISABLE);
    }
  }
  else
  {
    /* Read one byte from the receive data register */
    RxBuffer1[RxCounter1++] = USART_ReceiveData(USART1);

   /* Clear the USART1 Receive interrupt */
   USART_ClearITPendingBit(USART1, USART_IT_RXNE);

    if(RxCounter1 == NbrOfDataToRead1)
    {
      /* Disable the USART1 Receive interrupt */
      USART_ITConfig(USART1, USART_IT_RXNE, DISABLE);
    }
  }
}

//**********串口基本配置***********************************/
  USART_InitStructure.USART_BaudRate = 9600;
  USART_InitStructure.USART_WordLength = USART_WordLength_8b;
  USART_InitStructure.USART_StopBits = USART_StopBits_1;
  USART_InitStructure.USART_Parity = USART_Parity_No;
  USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
  USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
  USART_InitStructure.USART_Clock = USART_Clock_Disable;
  USART_InitStructure.USART_CPOL = USART_CPOL_Low;
  USART_InitStructure.USART_CPHA = USART_CPHA_2Edge;
  USART_InitStructure.USART_LastBit = USART_LastBit_Disable;

  /* Configure USART1 */
  USART_Init(USART1, &USART_InitStructure);
  /* Configure USART2 */
  USART_Init(USART2, &USART_InitStructure);

  /* Enable USART1 Receive and Transmit interrupt */
  USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
  USART_ITConfig(USART1, USART_IT_TXE, ENABLE);

  /* Enable USART2 Receive and Transmit interrupt */
  USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);
  USART_ITConfig(USART2, USART_IT_TXE, ENABLE);

  /* Enable the USART1 */
  USART_Cmd(USART1, ENABLE);
  /* Enable the USART2 */
  USART_Cmd(USART2, ENABLE);

//**********中断配置***********************************/
  /* Enable the USART1 Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQChannel;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);

  /* Enable the USART2 Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQChannel;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);

STM32F101系列 串口发送中断进不来是为什么

你用的是什么中断？是否使能了相应的中断？