M4串口1与串口3应用区别

1040128183 · 发表于 2016-5-10 07:10:41

本帖最后由 1040128183 于 2016-5-10 07:26 编辑

void USART1_IRQHandler()
{
      u16 n=0;
      USART_ITConfig(USART1,USART_IT_RXNE,DISABLE);
      USART_ITConfig(USART3,USART_IT_RXNE,DISABLE);


      do
      {
            while(!USART_GetFlagStatus(USART1,USART_FLAG_RXNE));
            buf[n++]=USART_ReceiveData(USART1);
            USART_ClearFlag(USART1,USART_FLAG_RXNE);
      }while(!((buf[n-2]==0x0d)&&(buf[n-1]==0x0a)));
      n=0;
      do
      {
            USART_SendData(USART1,buf[n++]);
            while(!USART_GetFlagStatus(USART1,USART_FLAG_TC));
            USART_ClearFlag(USART1,USART_FLAG_TC);
      }while(!(buf[n-2]==0x0d&&buf[n-1]==0x0a));


      USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);
      USART_ITConfig(USART3,USART_IT_RXNE,ENABLE);
}
void USART3_IRQHandler()
{
      int n=0;
      USART_ITConfig(USART3,USART_IT_RXNE,DISABLE);
      USART_ITConfig(USART1,USART_IT_RXNE,DISABLE);


      do
      {
            while(!USART_GetFlagStatus(USART3,USART_FLAG_RXNE));
            buf[n++]=USART_ReceiveData(USART3);
            USART_ClearFlag(USART3,USART_FLAG_RXNE);
      }while(!((buf[n-2]==0x0d)&&(buf[n-1]==0x0a)));
      n=0;
      do
      {
            USART_SendData(USART3,buf[n++]);
            while(!USART_GetFlagStatus(USART3,USART_FLAG_TC));
            USART_ClearFlag(USART3,USART_FLAG_TC);
      }while(!(buf[n-2]==0x0d&&buf[n-1]==0x0a));


      USART_ITConfig(USART3,USART_IT_RXNE,ENABLE);
      USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);
}