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Re: A/D轉換之問題
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資深會員
 
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不要用ADCON0,GO這個旗標來判斷,試試看用中斷旗標ADIF。
程式裡沒看到你把ADRESL拿出來看... 是不是要加一下 MOVF ADRESL,W MOVWF PORTC
發表於: 2008/1/23 8:50
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A/D轉換之問題
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新會員
 
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請問
當我使用A/D轉換後，其儲存之"ADRESH"與"ADRESL"為何都是相同的。是程式的問題嗎？還是有什麼東西壞了？--謝謝^^ 以下為使用之程式-- LIST P=16F877A #INCLUDE <P16F877A.INC> VAL_US EQU .1 COUNT EQU 0X20 ORG 0X00 NOP GOTO INITIAL INITIAL: BANKSEL TRISD CLRF TRISD BANKSEL PORTC CLRF PORTC BANKSEL ADCON1 MOVLW 0X00 MOVWF ADCON1 BANKSEL ADCON0 MOVLW 0X41 MOVWF ADCON0 START: CALL DELAY_25US BSF ADCON0,GO F0: BTFSC ADCON0,GO GOTO F0 MOVF ADRESH,W MOVWF PORTD GOTO START DELAY_25US: MOVLW VAL_US MOVWF COUNT DEC_LOOP: NOP DECFSZ COUNT,F GOTO DEC_LOOP RETURN END
發表於: 2008/1/22 21:46
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