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請教16F819 的ADC
#1
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#INCLUDE <P16F819.INC>


DY_1    EQU    20H
DY_2    EQU    21H


    ORG    00H
    
GOTO    START
    ORG    10H

START
:
    
BCF        STATUS,7    CHANGE TO BANK0
        BSF        STATUS
,RP0
    
    MOVLW    0X01
    MOVWF    PORTA

    CALL    INTARL_AD
    
    CALL    DELAY

    BCF    STATUS
,RP0
    BSF    ADCON0
,GO    


WAIT_AD
:
        
CLRWDT
    BTFSC    ADCON0
,GO
    
GOTO    WAIT_AD

    NOP
    
GOTO    WAIT_AD
    



;---------------------------------------------------------------
;
;---------------------------------------------------------------


INTARL_AD:
    
BSF    STATUS,RP0
    
    MOVLW    0X8E
    MOVWF    ADCON1
    

    BCF    STATUS
,RP0    CHANGE TO BANK0
    MOVLW    0XC1
    MOVWF    ADCON0

    


    
RETURN



;--------------------------------------------------------------------
DELAY
;--------------------------------------------------------------------
DELAY:


    
CLRF    DY_1
    CLRF    DY_2
DELAY_L
:
    
    
CLRF    DY_1

DELAY_H
:
    
CLRWDT    
    DECFSZ    DY_1
    
GOTO    DELAY_H
    
    DECFSZ    DY_2
    
GOTO    DELAY_L

    
RETURN


    
END

你好:以上是我試著啟動adc,但在我要將ADCON0的 GO BIT設定為"1"時,一直無法設定進去(此BIT一直為"0")。是我有設定錯嗎?? 還是我的程式有錯?? 謝謝指教

發表於: 2005/8/9 13:21
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