汇编语言 51单片机 器程序

ORG 0000H
LJMP MAIN
ORG 000BH
LJMP T0ISR
ORG 0030H
MAIN:
MOV TMOD，#01H
MOV TH0，#HIGH(65536-10000)
MOV TL0，#LOW(65536-10000)
SETB ET0
SETB EA
MOV R0，#9
MOV R1，#9
MOV R2，#0
MOV R3，#9
CLR 00H
CLR 01H
LOOP:
JB P1.0，LP01
JNB P1.0，$
SETB TR0
CLR 01H
SJMP LOOP0
LP01:
JB P1.1，LP02
JNB P1.1，$
SETB 01H
SJMP LOOP0
LP02:
JB P1.2，LOOP0
JNB P1.1，$
CLR TR0
MOV P3，#0FDH
MOV P2，#0
MOV P3，#0FEH
MOV P2，#0
SJMP MAIN
LOOP0:
JB 00H，LOOP1
MOV A，R0
SJMP LOOP2
LOOP1:
MOV A，R1
LOOP2:
MOV DPTR，#TABLE
MOVC A，@A+DPTR
MOV R3，A
SJMP LOOP
T0ISR:
CLR TR0
MOV TH0，#HIGH(65536-10000)
MOV TL0，#LOW(65536-10000)
SETB TR0
JB 01H，T0C
INC R2
T0C:
CPL 00H
MOV A，R3
JB 00H，T001
MOV P3，#0FDH
MOV P2，A
SJMP T002
T001:
MOV P3，#0FEH
MOV P2，A
T002:
MOV A，R2
CJNE A，#100，T0E
MOV R2，#0
MOV A，R0
JZ T003
DEC R0
SJMP T0E
T003:
MOV A，R1
JZ T004
DEC R1
MOV R0，#9
T0E:
RETI
T004:
CLR TR0
RETI
TABLE: ; 共阴极数码管显示代码表
DB 3FH，06H，5BH，4FH，66H ;01234
DB 6DH，7DH，07H，7FH，6FH ;56789
END