（一）显示调试程序
ORG 0000H
MOV P0,#0FFH
NOP
MOV P2,#11111111B
NOP
NOP
mov p2,#1FH
NOP
NOP
AA: MOV P0,#0B0H
setb p2.7
NOP
NOP
NOP
clr p2.7
（二）总体程序
ORG 0000H
AJMP ST
ORG 000BH
AJMP LOCK
ORG 001BH;
AJMP OPEN；运用两个定时器
ORG 0030H
ST: MOV P2,#00011111B；上电不选通数码管
MOV TMOD,#22H
MOV SP,70H
MOV TH0,#3CH
MOV TL0,#0B0H
MOV TH1,#3CH
MOV TL1,#0B0H
MOV P2,#1FH
mov r6,#00h
mov r4,#00h
mov r0,#00h
mov r1,#00h
mov R2,#00h
MOV R3,#00H
MOV R5,#00H
MOV R7,#00H
clr a
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