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關於pic16f627a
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請問各位我有一塊裸版,上面有一顆pic16f627a鑰對其寫一些控制程式,並且要與同為裸版上面的cpu溝通,
我的問題是pic的RA3是input其定義為power enable接收cpu的狀態也就是當cpu開機或是wake up 時會送一個3.3伏特的訊號給pic,反之,休眠時則送一個0v的訊號給pic,由pic來判斷是power on or power off,所以就現簡單瀉一個 if(RA3) { } else { } 可是程式卻無法判斷RA3是否為High or Low,但是在公版上面則是可以動作,想請問大家是什麼問題呢
發表於: 2005/6/20 9:48
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