P0 口 数据输出 采用共阳极7段数码管
ORG 00H
START: MOV P1,#00000011B ;0
CALL DELAY
MOV P1,#10011111B;1
CALL DELAY
MOV P1,#00100101B;2
CALL DELAY
MOV P1,#00001101B;3
CALL DELAY
MOV P1,#10011001B;4
CALL DELAY
MOV P1,#01001001B;5
CALL DELAY
MOV P1,#01000001B;6
CALL DELAY
MOV P1,#00011111B;7
CALL DELAY
MOV P1,#00000001B;8
CALL DELAY
; MOV P1,#00011001B;9
JMP START
DELAY: ;延时1S子程序
MOV R3,#100
D1: MOV R4,#20
D2: MOV R5,#248
DJNZ R5,$
DJNZ R4,D2
DJNZ R3,D1
RET
END