6 个数码管都不会亮了

只看该作者 · 2017-6-30 22:16

现在问题是,上电能显示654321,可当按下P1.3口接的按键时,6 个数码管都不会亮了,程序哪里出了问题
程序目的:上电时数码管显示654321,每次按下P1.3口按键时
对31H中的数据加一,加到 10时,31H中清0并对下一个地址
(32H)中的数据加1,依次类推
org 0000h
jmp start
org 0003h
reti
org 000bh
reti
org 0013h
jmp wzd1
org 001bh
reti
org 0023h
reti

wzd1: push psw    ;外中断入口
   push acc
   clr ea
   clr ex1
   jnb p1.3,key3 1.3为0时转KEY3
wzdfh:pop acc       ;外中断返回
   pop psw
   setb ea
   setb ex1
   reti
key3:call delay10ms
   jb p1.3,wzdfh
l1: jnb p1.3,$
   inc 31h          1.3松开时31H加1
   mov a,#10
   cjne a,31h,wzdfh    ;31H中不等于10中断返回
   clr a
   mov 31h,a          ;31H中的数据清0并对下一地址中的数据加一
   inc 32h
   mov a,#10
   cjne a,32h,wzdfh
   clr a
   mov 32h,a
   inc 33h
   mov a,#10
   cjne a,33h,wzdfh
      clr a
   mov 33h,a
   inc 34h
   mov a,#10
   cjne a,34h,wzdfh
      clr a
   mov 34h,a
   inc 35h
   mov a,#10
   cjne a,35h,wzdfh
      clr a
   mov 35h,a
   inc 36h
   mov a,#10
   cjne a,36h,wzdfh
   clr a
   mov 36h,a
   jmp wzdfh

start:mov 31h,#1
   mov 32h,#2
   mov 33h,#3
   mov 34h,#4
   mov 35h,#5
   mov 36h,#6
   clr p1.5
   setb ea
      setb ex1
start1:call display
   jmp start1
display:mov r1,#31h
mov r2,#00000001
play:  mov p0,#0ffh
   mov a,r2
   mov p2,a
   mov a,@r1
   mov dptr,#tab
   movc a,@a+dptr
   mov p0,a
   call delay1ms
   inc r1
   mov a,p2
   jb acc.5,endout
   rl a
   mov r2,a
   mov p2,#0h
   jmp play
endout:mov p0,#0ffh
   mov p2,#0
   ret
delay1ms:mov r3,#2
d1: mov r4,#250
d2: djnz r4,$
      djnz r3,d1
      ret
delay10ms: call play ;10ms子程序,调用一次显示子程序约6ms,调两次约12ms
         call play
      ret

tab:db 48h,0ebh,52h,62h,0e1h,64h,44h,0eah,40h,60h
end