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Re: 有關PORTA
#2
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ADC的設定以將類比輸入設為 Digital I/O Mode,但類比的比較器還開著,請參考 PIC16F873A Data Sheet page 134 (Figure 12-1) <CM2:CM0>要設為 111 後,Voltage Comparator 才會關閉後PORT0-3 才會有功能。

發表於: 2006/6/16 14:38
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有關PORTA
#1
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list    p=16F873Af=INHX8Mr=DECb=8C=80
    
#include     <p16F873A.inc>        ; Include file locate at defult directory
        


        
ORG        0X00
        
GOTO    MAIN_C
        ORG        0X04
        
GOTO    INT_MAIN 
        ORG        0X10            

                                MAIN_C    BSF    STATUS
,RP0
        MOVLW    0X06
        MOVWF    ADCON1
        
;MOVLW    0X06
        MOVWF    CMCON
        MOVLW    0X0F
        MOVWF    TRISA
        MOVLW    0X80
        MOVWF    TRISC
        MOVLW    0XF0
        MOVWF    TRISB
        MOVLW    0X20
        MOVWF    TXSTA
        MOVLW    0X19
        MOVWF    SPBRG
        MOVLW    0X20
        MOVWF    PIE1

        BCF        STATUS
,RP0
        MOVLW    0X90
        MOVWF    RCSTA
        MOVLW    0XC0
        MOVWF    INTCON

MAIN    MOVLW    0XF5
        MOVWF    PORTB
XX        CALL    DEL_1MS
        BTFSS    PORTA
,1
        
GOTO     MAIN    
        BSF        PORTB
,1
        
GOTO    XX
        

當PROTA
,1     ON時   設定PORTB,1為1....我用的是16F873A....
可是當PORTA,1ON時,我的PORTB,1怎麼都沒動作ㄋ....
是不是我哪裡還沒有設定阿???   
請各位先進,幫我解開迷團ㄇ!!我看了DATA SHEET  我覺得這樣設定應該是可以動作的阿!!!

發表於: 2006/6/15 19:03
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