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ahwhchj
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樓主  發(fā)表于: 2014-09-16 12:18
DFIU/DFID上升沿和下降沿到底是起什么作用的��？求高手解答。
liusiming
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1樓  發(fā)表于: 2014-09-27 23:12
上升沿和下降沿只動(dòng)作一次。
當開(kāi)關(guān)量來(lái)說(shuō)的話(huà)，上升沿按下時(shí)開(kāi)，下降沿按下松開(kāi)時(shí)才開(kāi)。

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