我用ecap检测电网频率,硬件电路实现电网由负到正时出现下降沿,由正到负时出现上升沿,设定为下降沿触发,但为什么有的时候上升沿也会触发这个中断?不是每次都触发,是很偶尔的触发。
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我用ecap检测电网频率,硬件电路实现电网由负到正时出现下降沿,由正到负时出现上升沿,设定为下降沿触发,但为什么有的时候上升沿也会触发这个中断?不是每次都触发,是很偶尔的触发。