1.asm

P1口的流水灯程序

main: 
mov p1,#0f5h
lcall delay
mov p1,#0aah
lcall delay

ljmp main
delay:
    mov r7,#0ffh
d1: mov r6,#0ffh
d2: djnz r6,d2
    djnz r7,d1
    ret
    end