noname1

汇编语言写的时钟程序,已调试通过,使用的是51单片机.

display:mov r1,#78h
        mov r2,#0feh
play:   mov p1,#0ffh
        mov a,r2
        anl p3,a
        mov a,@r1
        mov dptr,#tab
        movc a,@a+dptr
        mov p1,a
        call dl1ms
        inc r1
        mov a,r2
        rl a
        jnb acc.3,endout
        mov r2,a
        ajmp play
endout: mov p1,#0ffh
        MOV P3,#0FFH
        ;mov a,#0ffh
        ;anl p3,a
        djnz r7,display

        ret







 gogo:
 go30:clr c
     mov a,70h
     cjne a,#30,gg30
     ajmp speaker

gg30:jc speaker

g230:clr c
     mov a,70h
     cjne a,#230,gg230
     ajmp speaker
gg230:
      jnc speaker
      ret
speaker:mov r2,#50
    spp:clr speak ;p3.6
        clr lamp   ;p3.5
        call bcd
        call display
        call display
        djnz r2,spp
        ret




        go30:clr c
     mov a,70h
     cjne a,#30,gg30
     ajmp speaker

gg30:jc speaker

g230:clr c
     mov a,70h
     cjne a,#230,gg230
     ajmp speaker
gg230:
      jnc speaker
      ajmp start
speaker:clr speak
        ajmp start