串口接收实例——空闲中断

版权声明：转载记得声明~~~ :) https://blog.csdn.net/ReCclay/article/details/82424958

//先看51的
void UARTInterrupt(void) interrupt 4
{
    if(RI)
    {
        RI = 0;
        UsartReceive[UsartReadCnt] = SBUF;
        UsartReadCnt++;
        if(UsartReadCnt > ReadLength-2)//防止溢出
        {
            UsartReadCnt = 0;
        }
    }
}
void Timer0Interrupt(void) interrupt 1
{
    TH0 = (65536 - 5000) / 256;
    TL0 = (65536 - 5000) % 256; //定时5ms

    if(UsartReadCnt != 0)//接收到数据
    {
        if(UsartIdleCnt == UsartReadCnt)
        {
            UsartReadCntCopy = UsartReadCnt;
            UsartReadCnt = 0;
            UsartIdleCnt = 0;
            UsartFlag = 1;
        }
        else
        {
            UsartIdleCnt  = UsartReadCnt;
        }   
    }
}
...
if(UsartFlag == 1)
{
    UsartFlag = 0;
    ...
}

...



//STM32的
void USART1_IQRHandler(void)
{
    if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)//表示接收到数据
    {
        Usart1ReadBuff[Usart1ReadCnt++] = USART_ReceiveData(USART1);

        if(Usart1ReadCnt > UsartReadLen - 10)
        {
            Usart1ReadCnt = 0;
        }
    }
}
void TIM2_IRQHandler(void)
{
    if(TIM_GetITStatus(TIM2, TIM_IT_Update) == SET)
    {
        TIM_ClearITPendingBit(TIM2, TIM_IT_Update);

        if(Usart1ReadCnt != 0)
        {
            if(Usart1ReadCnt == Usart1IdleCnt)
            {
                Usart1ReadCntCpoy = Usart1ReadCnt;
                Usart1ReadCnt = 0;
                Usart1IdleCnt = 0;
                Usart1ReadFlag = 1;
            }
        }
    }
}
...
if(Usart1ReadFLag == 1)
{
    Usart1ReadFlag = 0;
    ...
}
...