ORG 0000H
AJMP MAIN
MAIN: MOV R2,#50
CLR C
D0: CALL ADCINT
CALL DISP
D1: JNB P2.3,KEY1
JNB P2.2,KEY2
LJMP D0
//A/D轉(zhuǎn)換程序
ADCINT :MOV R1,#30H
MOV DPTR,#7FF8H
MOV R7,#08H
ADC: MOVX @DPTR,A
HER: JNB P3.0,HER
MOVX A,@DPTR
MOV @R1,A
INC DPTR
INC R1
DJNZ R7,ADC
RETI
顯示程序
DISP: MOV A,R2
MOV B,#10
DIV AB
MOV 20H,A
MOV 21H,B
MOV DPTR,#TABLE
CLR P2.4 //十位顯示
CLR P2.5
MOV A,20H
MOVC A,@A+DPTR
MOV P1,A
SETB P2.4
CALL DELAY
CLR P2.4 //個位顯示
MOV DPTR,#TABLE
MOV A,21H
MOVC A,@A+DPTR
MOV P1,A
SETB P2.5
CALL DELAY
RET
KEY1: CALL DELAY1
JB P2.3,D1
MOV A,R2
INC A
MOV R2,A
CALL DISP
RET
KEY2: CALL DELAY1
JB P2.2,D1
MOV A,R2
DEC A
MOV R2,A
RET
DELAY: MOV R6,#5
D2: MOV R5,#249
DL0: NOP
NOP
DJNZ R5,DL0
DJNZ R6,D2
RET
DELAY1: MOV R6,#10
D3: MOV R5,#249
DL1: NOP
NOP
DJNZ R5,DL0
DJNZ R6,D3
RET
TABLE: DB 0C0H,0F9H,0A4H,0B0H,99H
DB 92H,82H,0F8H,80H,90H
END
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