计数器.asm

WAVE6000编写的常用的程序 包括键盘 通信 数据转换

        org 0000h       
        ajmp main
        org 000bh
        reti
        org 001bh
        ajmp int_1
main:   mov a,#0bbh
        mov r4,#04h
        acall led
start:  mov sp,#60h
        mov tmod,#1dh
        mov tl0,#00h
        mov th0,#00h
        mov tl1,#0b0h     ;晶振为12M,若晶振为11.0592M时,时间常数为4C00H,若晶振为6M时,时间常数为9E58H
        mov th1,#3ch
        mov r0,#14h
        setb tr0
        setb et0
        setb tr1
        setb et1
        setb ea
here:   sjmp here
int_1:  push acc
        push psw
        clr tr1
        clr tr0
        mov r1,tl0
        mov r2,th0
        mov tl0,#00h
        mov th0,#00h
        mov tl1,#0b0h
        mov th1,#3ch
        setb tr1
        setb tr0
        djnz r0,e_end
        mov r0,#14h
        mov a,r1
        acall show
        mov a,r2
        acall show
e_end:  pop psw
        pop acc
        reti
show:   mov b,#10h
        div ab
        mov r5,a
        mov r3,b
        mov dptr,#tab
        mov a,r3
        movc a,@a+dptr
        mov r4,#01h
        acall led
        mov a,r5
        mov dptr,#tab
        movc a,@a+dptr
        mov r4,#01h
        acall led
        ret
led:    mov scon,  #00h
        mov sbuf,  a
        jnb ti,    $
        clr ti
        djnz r4,led
        ret

tab:    db 0bbh,09h,0eah,6bh,59h,73h,0f3h,0bh
        db 0fbh,07bh,0dbh,0f1h,0b2h,0e9h,0f2h,0d2h