SJMP MAIN
ORG 0030H
MAIN:
MOV A, #7FH
OUT_P1:
MOV P1, A
RL A
LCALL DL_100MS
SJMP OUT_P1
DL_100MS: ;這裏的數字,可以自行調整到延時200ms
MOV R3, #20
D1: MOV R4, #20
D2: MOV R5, #248
DJNZ R5, $
DJNZ R4, D2
DJNZ R3, D1
RET
END