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Re: 讀取兩個channel 的AD , 其中一個發生錯誤
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版主
 
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ADCON0=0b00000101; //設AD2 (AN1) 在PIC18F4520是選擇了 AN1 為輸入。程式看起來沒有錯，請用電錶量一下 AN1 實際電壓值為何?
發表於: 2008/6/16 17:42
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讀取兩個channel 的AD , 其中一個發生錯誤
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初級會員
 
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請問各位大大
我的程式這樣寫 為什麼18F的AN0的資料可正確讀取 但AN1的資料讀回來都是錯的 ADCON1=0b00001101; // use AN0 and AN1 ADCON2=0b10001101; // Right justified ADCON0=0b00000001; //設AD1 (AN0) Delay100TCYx(10); ADCON0bits.GO = 1; // Start AD conversion while(ADCON0bits.NOT_DONE); // Wait for conversion BATT[k]=ADRESH&0x03; //high byte BATT[k+1]=ADRESL; //low byte ADCON0=0b00000101; //設AD2 (AN1) Delay100TCYx(10); ADCON0bits.GO = 1; // Start AD conversion while(ADCON0bits.NOT_DONE); // Wait for conversion BATT[k+3]=ADRESH&0x03; //high byte BATT[k+4]=ADRESL; //low byte
發表於: 2008/6/16 16:59
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