串口0备用引脚为(P1_4 P1_5),当我在P1外部中断服务函数,清除P1IF时。串口就无法正常工作,我使用的是DMA串口
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串口0备用引脚为(P1_4 P1_5),当我在P1外部中断服务函数,清除P1IF时。串口就无法正常工作,我使用的是DMA串口