現在問題是,上電能顯示654321,可當按下P1.3口接的按鍵時,6 個數碼管都不會亮了,程序哪里出了問題
程序目的:上電時數碼管顯示654321,每次按下P1.3口按鍵時
對31H中的數據加一,加到 10時,31H中清0并對下一個地址
(32H)中的數據加1,依次類推
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org 0000h
jmp start
org 0003h
reti
org 000bh
reti
org 0013h
jmp wzd1
org 001bh
reti
org 0023h
reti
wzd1: push psw ;外中斷入口
push acc
clr ea
clr ex1
jnb p1.3,key3 ;P1.3為0時轉KEY3
wzdfh:pop acc ;外中斷返回
pop psw
setb ea
setb ex1
reti
key3:call delay10ms
jb p1.3,wzdfh
l1: jnb p1.3,$
inc 31h ;P1.3松開時31H加1
mov a,#10
cjne a,31h,wzdfh ;31H中不等于10中斷返回
clr a
mov 31h,a ;31H中的數據清0并對下一地址中的數據加一
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,調用一次顯示子程序約6ms,調兩次約12ms
call play
ret
tab:db 48h,0ebh,52h,62h,0e1h,64h,44h,0eah,40h,60h
end
哎~~
我也是開始學匯編，現在開始學C了~~~
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