?? ledkey.asm
字號(hào):
;8個(gè)led循環(huán)5次右移;然后5次左移。
org 0000h
ajmp START1
org 0003h
reti
org 000bh
reti
org 0013h
reti
org 001bh
reti
org 0023h
reti
org 0030h
start1:MOV SP,#60H
SETB P1.6
SETB P3.5
MOV R0,#00H
MOV R1,#00H
MOV R2,#02H
CLR F0
MOV A,#80H
MOV TMOD,#01H
MOV TL0,#00H
MOV TH0,#00H
LOOPM:SETB P1.6
ACALL SOUT
CLR P1.6
SETB TR0
INC R1
CJNE R1,#08H,LOOPN
INC R0
MOV R1,#00H
LOOPN:JNB TF0,$
CLR TF0
MOV TL0,#00H
MOV TH0,#00H
DJNZ R2,LOOPN
MOV R2,#02H
CJNE R0,#05H,LOOPO
CPL F0
MOV R0,#00H
LOOPO:JB F0,LOOPA
RR A
SJMP LOOPM
LOOPA:RL A
SJMP LOOPM
SOUT:MOV SBUF,A
JNB TI,$
CLR TI
RET
END
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