F030通讯一直中断

fansanderen 提问时间：2018-5-11 16:33 /

我用的STM32F030C8T6做通讯，TTL主动发送数据采集室内空气参数模块数据，但是用了好几个达人的例程都是一直死在中断，望请协助！万分感谢
//初始化函数
void initUart(void)
{
      USART_InitTypeDef  USART_InitStructure;
      GPIO_InitTypeDef GPIO_InitStructure;
      NVIC_InitTypeDef NVIC_InitStructure;

      RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA,ENABLE);
      RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);

      /* USART2 Pins configuration ******/
      /* Connect pin to Periph */
      GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_1);
      GPIO_PinAFConfig(GPIOA, GPIO_PinSource10, GPIO_AF_1);

      /* Configure pins as AF pushpull */
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
      GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
      GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
      GPIO_Init(GPIOA, &GPIO_InitStructure);

      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_Init(USART1,&USART_InitStructure);

   USART_ClearFlag(USART1,USART_FLAG_TC);
      USART_ITConfig(USART1,USART_IT_TC,ENABLE);
      //USART_ITConfig(USART1,USART_IT_TXE,ENABLE);
      USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);
      USART_Cmd(USART1,ENABLE);    //使能串口

      NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
      NVIC_InitStructure.NVIC_IRQChannelPriority = 1;
      NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
      NVIC_Init(&NVIC_InitStructure);    //使能串口中断
}
//网上下的例程
void Usart_TxByte(uint8_t dat)
{
  USART_SendData(USART1,dat);
  while (USART_GetFlagStatus(USART1, USART_FLAG_TC) != SET);
}

/**
  * @brief  send string
  * @param  string ->  pointer string will be send
  * @retval None
  */
void Usart_TxString(uint8_t *string)
{
  while(*string != '\0')
Usart_TxByte(*string++);
}

/**
  * @brief  interrupt server function
  * @param  None
  * @retval None
  */
void USART1_IRQHandler(void)
{
  static uint8_t n = 0;
  //一直可以进入
  if(USART_GetFlagStatus(USART1,USART_FLAG_ORE)) //溢出中断
USART1->ICR |= 1 << 3;// USART_ReceiveData(USART1); //空读清除ORE位
//一直可以进入
  if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)
  {
Usart_TxByte(USART_ReceiveData(USART1));
  }
//一直可以进入
  if(USART_GetITStatus(USART1, USART_IT_TC) != RESET)
  {
if(TestString[n] == '\0')
{
   USART_ClearFlag(USART1,USART_FLAG_TC);
   Tx_BusyFlag = 0;n = 0;
}
else
{
   Tx_BusyFlag = 1;
   USART_SendData(USART1,TestString[n++]);
}
  }
}

赞收藏评论4 发布时间：2018-5-11 16:33

4个回答

黑皮男回答时间：2018-5-11 17:18:03

接收数据后清除一下中断标志位试试

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wenyangzeng 回答时间：2018-5-11 17:39:36

楼主的发送既有查询发送又有中断发送，貌似冲突。
而：
if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)
{
Usart_TxByte(USART_ReceiveData(USART1));
}
按理应该接收完成后再发送，否则当然要无限死循环了。