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Re: 請問有關PORT設定問題....
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版主
 
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你只要單獨設定 RA4 為 output 就好了。
TRISAbits.TRISA4=0; //這樣就好了 底下是p18f2550.inc對TRISA的宣告: 建議看看右邊教育訓練裡的 W401 C18 workshop 這樣對你是有幫助的。 extern volatile near unsigned char TRISA; extern volatile near struct { unsigned TRISA0:1; unsigned TRISA1:1; unsigned TRISA2:1; unsigned TRISA3:1; unsigned TRISA4:1; unsigned TRISA5:1; unsigned TRISA6:1; } TRISAbits;
發表於: 2005/7/20 21:00
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請問有關PORT設定問題....
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新會員
 
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各位高手好...
小弟我有一些問題...煩請賜教.. 我用的是PIC18F2550.... 我把PortA的RA0~RA3,RA5用來做A/D轉換的Input 但是我需要用RA4來當一般I/O... 而要把RA4當一般I/O時(輸出Hi or Lo)...需下: TRISA = 0; //設定PortA為輸出... 但當我執行完上述指令後...RA0~RA3,RA5就被當成一般I/O... 請問我該如何設定這些Port呢..?...煩請賜教 還有...就是一開始 #include <p18cxxx.h> 組譯後 應該會對整個Controller做設定(包含Port)... 請問是這樣嗎..?
發表於: 2005/7/20 16:47
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