代码

#include<p16f722a.inc>

;__CONFIG	_CONFIG1 (_LP_OSC & _PWRTE_OFF & _WDT_OFF & _CP_OFF);
;__CONFIG	_CONFIG1, _PWRTE_ON , _XT_OSC , _WRT_OFF , _LVP_OFF, _CPD_OFF
	cblock 0x20
adChSel
adValBuff
count1
count2
	endc

	org 0x00
	goto main

	org 0x20
main
	banksel TRISC
	MOVLW	.0
	;MOVWF	TRISB
	MOVWF	TRISC
	banksel	PORTB
	CLRF	PORTB
	BANKSEL	ADCON1
	;CLRF	ADCON1
	MOVLW	B'10'
	MOVWF	ADCON1

	MOVLW	B'00000001'
	MOVWF	TRISA
	
	BANKSEL	ADCON0
	MOVLW	B'000001'
	MOVWF	ADCON0
	CLRF	adChSel
	CLRF	adValBuff
Loop
	CALL	AdConvert
	goto	Loop

AdConvert
	call	SamplingDelay
	clrf	STATUS
	BSF		ADCON0,GO
	BTFSC	ADCON0,GO
	GOTO	$-1
	
	BANKSEL	ADRES
	
	movf	ADRES,W
	
	banksel	PORTC
	MOVWF	PORTC
	
	return

SamplingDelay
	;clrf	count1
	clrf	count2
	decfsz	count2,f
	goto	$-1
	;decfsz	count1,f
	;goto	$-3
	return

END

仿真效果图

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