ct2a:mov 43h,4ah
ret
cd1:;-----常断个位定时减----
jnb p3.0,$
mov r4,4dh
dec 4dh
cjne r4,#00h,cd1a
mov 4dh,#09h
cd1a:mov 42h,4dh
ret;
cd2:;-----常断十位定时减----
jnb p3.0,$
mov r4,4ch
dec 4ch
cjne r4,#00h,cd2a
mov 4ch,#09h
cd2a:mov 43h,4ch
ret
qd: mov 46h,#00h
mov 44h,#00h
mov 42h,4bh
mov 43h,4ah
mov ie,#88h
clr nca
clr ncb
setb tr1
clr p3.7
ret
ms10:;----- 延时毫秒-------
mov r0,#100
ms: nop
djnz r0,ms
ret
;---------------------------
tab: db 80h,0f2h,48h,60h,32h,24h
db 04h,0f0h,00h,20h
end
上一篇：AT89C51编程器
