shiyan.asm

自己做的一个单片机实验,实现led灯的闪烁

        org     0000h
        ljmp    main
        org     0003h
        ljmp    iint0
        org     0013h
        ljmp    iint1
        org     0030h
main:   mov     ie,#85h
        mov     ip,#02h
        mov     tcon,#0
        clr     a
loop:   mov     p1,a
        lcall   delay
        cpl     a
        ljmp    loop
iint0:
        push    acc
        mov     r1,#2
loop11: mov     a,#0ffh
        clr     c
        mov     r2,#8
loop12: rlc     a
        mov     p1,a
        lcall   delay
        djnz    r2,loop12
        mov     r2,#7
loop13: rrc     a
        mov     p1,a
        lcall   delay
        djnz    r2,loop13
        djnz    r1,loop11
        pop     acc
        reti
iint1:
        push    acc
        mov     r1,#2
loop21: mov     a,#0fch
        mov     r2,#6
loop22: rl      a
        mov     p1,a
        lcall   delay
        djnz    r2,loop22
        mov     r2,#6
loop23: rr      a
        mov     p1,a
        lcall   delay
        djnz    r2,loop23
        djnz    r1,loop21
        pop     acc
        reti
delay:  mov     r4,#10
loop31: mov     r5,#40
loop32: mov     r6,#0ffh
        djnz    r6,$
        djnz    r5,loop32
        djnz    r4,loop31
        ret
        end