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TMS320F28335: 两次进入中断子程序

Part Number: TMS320F28335


开发板上的GPIO12引脚和按键KEY连接,按下KEY后,GPIO12为低电平

GPIO67引脚与LED灯相连,GPIO67输出低电平时,LED灯亮,输出高电平时,LED不亮。

我想通过中断方式用KEY控制LED灯的亮灭,设置为下降沿触发。

我用示波器两个引脚的波形,发现了一些异常,具体描述见附件word。

1411.中断问题.docx