用数码管就可以了,比如用共阳的数码管,程序如下:(89C52)
cs0809 equ 08000h
aa:
mov b,#51
div ab
movc a,@a+dptr
clr p3.0
setb p3.1 数码管的COM端
setb p3.2
mov dptr,#cs0809
movx @dptr,a
orl a,#80h
mov p1,a
call delay
setb p3.0
clr p3.1
setb p3.2
mov a,b
mov b,#5
div ab
mov dptr,#tab
movc a,@a+dptr
mov dptr,#cs0809
movx @dptr,a
mov p1,a
call delay
setb p3.0
setb p3.1
clr p3.2
mov a,b
mov b,#10
mul ab
mov b,#51
div ab
mov dptr,#tab
movc a,@a+dptr
mov dptr,#cs0809
movx @dptr,a
mov p1,a
call delay
ljmp aa
tab: db 3fh,06h,5bh,4fh,66h,6dh,7dh,07h,7fh,6fh
delay:
mov r7,#0
mov r6,#10
delayloop:
djnz r7,delayloop
djnz r6,delayloop
ret
end
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