d.asm

来自「40个练习程序（坚持）.rar」· 汇编 代码 · 共 39 行

org 0000h
ajmp main
org 0030h
main:mov r0,#00h
mov r1,#00h
mov dptr,#table
x1:jb P3.0,x2
lcall delay
jb P3.0,x2
inc r0
mov a,r0
cjne a,#0ah,x2
clr a
mov r0,a
inc r1
cjne r1,#0ah,x2
mov r1,#00h
x2:mov a,r1
mov P2,#02h
movc a,@a+dptr
mov P0,a
mov a,r0
movc a,@a+dptr
mov P2,#03h
mov P0,a
ljmp x1
delay:
MOV R4,#30
D3:MOV R2,#10
D2:MOV R3,#248
D1:DJNZ R3,D1
DJNZ R2,D2
DJNZ R4,D3
RET
table: DB 3FH,06H,5BH,4FH,66H,6DH,7DH,07H
db 7FH,6FH
end