这是个按键控制数码管显示的:
ORG0000H
LJMPMAIN
ORG0100H
MAIN:CLRP2.0
MOVP1,#0FEH
MOVA,P1
CJNEA,#0FEH,SAO1
MOVP1,#0FDH
MOVA,P1
CJNEA,#0FDH,SAO2
MOVP1,#0FBH
MOVA,P1
CJNEA,#0FBH,SAO3
MOVP1,#0F7H
MOVA,P1
CJNEA,#0F7H,SAO4
LJMPMAIN
SAO1:ACALLDELAY
MOVA,P1
CJNEA,#0FEH,PAN1
LJMPMAIN
PAN1:CJNEA,#0EEH,PD1
MOVA,#00H
LJMPSEND
PD1:CJNEA,#0DEH,PD2
MOVA,#01H
LJMPSEND
PD2:CJNEA,#0BEH,PD3
MOVA,#02H
LJMPSEND
PD3:MOVA,#03H
LJMPSEND
SAO2:ACALLDELAY
MOVA,P1
CJNEA,#0FDH,PAN2
LJMPMAIN
PAN2:CJNEA,#0EDH,PD4
MOVA,#04H
LJMPSEND
PD4:CJNEA,#0DDH,PD5
MOVA,#05H
LJMPSEND
PD5:CJNEA,#0BDH,PD6
MOVA,#06H
LJMPSEND
PD6:MOVA,#07H
LJMPSEND
SAO3:ACALLDELAY
MOVA,P1
CJNEA,#0FBH,PAN3
LJMPMAIN
PAN3:CJNEA,#0EBH,PD7
MOVA,#08H
LJMPSEND
PD7:CJNEA,#0DBH,PD8
MOVA,#09H
LJMPSEND
PD8:CJNEA,#0BBH,PD9
MOVA,#0AH
LJMPSEND
PD9:MOVA,#0BH
LJMPSEND
SAO4:ACALLDELAY
MOVA,P1
CJNEA,#0F7H,PAN4
LJMPMAIN
PAN4:CJNEA,#0E7H,PD10
MOVA,#0CH
LJMPSEND
PD10:CJNEA,#0D7H,PD11
MOVA,#0DH
LJMPSEND
PD11:CJNEA,#0B7H,PD12
MOVA,#0EH
LJMPSEND
PD12:MOVA,#0FH
LJMPSEND
SEND:MOVDPTR,#TAB
ORG0000H
LJMPMAIN
ORG0100H
MAIN:CLRP2.0
MOVP1,#0FEH
MOVA,P1
CJNEA,#0FEH,SAO1
MOVP1,#0FDH
MOVA,P1
CJNEA,#0FDH,SAO2
MOVP1,#0FBH
MOVA,P1
CJNEA,#0FBH,SAO3
MOVP1,#0F7H
MOVA,P1
CJNEA,#0F7H,SAO4
LJMPMAIN
SAO1:ACALLDELAY
MOVA,P1
CJNEA,#0FEH,PAN1
LJMPMAIN
PAN1:CJNEA,#0EEH,PD1
MOVA,#00H
LJMPSEND
PD1:CJNEA,#0DEH,PD2
MOVA,#01H
LJMPSEND
PD2:CJNEA,#0BEH,PD3
MOVA,#02H
LJMPSEND
PD3:MOVA,#03H
LJMPSEND
SAO2:ACALLDELAY
MOVA,P1
CJNEA,#0FDH,PAN2
LJMPMAIN
PAN2:CJNEA,#0EDH,PD4
MOVA,#04H
LJMPSEND
PD4:CJNEA,#0DDH,PD5
MOVA,#05H
LJMPSEND
PD5:CJNEA,#0BDH,PD6
MOVA,#06H
LJMPSEND
PD6:MOVA,#07H
LJMPSEND
SAO3:ACALLDELAY
MOVA,P1
CJNEA,#0FBH,PAN3
LJMPMAIN
PAN3:CJNEA,#0EBH,PD7
MOVA,#08H
LJMPSEND
PD7:CJNEA,#0DBH,PD8
MOVA,#09H
LJMPSEND
PD8:CJNEA,#0BBH,PD9
MOVA,#0AH
LJMPSEND
PD9:MOVA,#0BH
LJMPSEND
SAO4:ACALLDELAY
MOVA,P1
CJNEA,#0F7H,PAN4
LJMPMAIN
PAN4:CJNEA,#0E7H,PD10
MOVA,#0CH
LJMPSEND
PD10:CJNEA,#0D7H,PD11
MOVA,#0DH
LJMPSEND
PD11:CJNEA,#0B7H,PD12
MOVA,#0EH
LJMPSEND
PD12:MOVA,#0FH
LJMPSEND
SEND:MOVDPTR,#TAB