stm32 串口接收字符串 中断程序怎么写

2025-04-27 18:44:52
推荐回答(1个)
回答1:

void USART3_IRQHandler(void)
{
u8 res;
if(USART_GetITStatus(USART3, USART_IT_RXNE) != RESET)//½ÓÊÕµ½Êý¾Ý
{
res =USART_ReceiveData(USART3);
if((USART3_RX_STA&(1<<15))==0)//½ÓÊÕÍêµÄÒ»ÅúÊý¾Ý,»¹Ã»Óб»´¦Àí,Ôò²»ÔÙ½ÓÊÕÆäËûÊý¾Ý
{
if(USART3_RX_STA{
TIM_SetCounter(TIM7,0);//¼ÆÊýÆ÷Çå¿Õ //¼ÆÊýÆ÷Çå¿Õ
if(USART3_RX_STA==0) //ʹÄܶ¨Ê±Æ÷7µÄÖжÏ
{
TIM_Cmd(TIM7,ENABLE);//ʹÄܶ¨Ê±Æ÷7
}
USART3_RX_BUF[USART3_RX_STA++]=res; //¼Ç¼½ÓÊÕµ½µÄÖµ
}else
{
USART3_RX_STA|=1<<15; //Ç¿ÖÆ±ê¼Ç½ÓÊÕÍê³É
}
}
}
}