八段数码管动态显示“1234”，可却显示“1432”，如何正确显示“1234”，求高手指导。

显示全部楼层 · 2011-5-1 18:14:08

程序如下：

ORG 0000H
LJMP MAIN
ORG 0100H
MAIN:
MOV 23H,#4
MOV 22H,#3
MOV 21H,#2
MOV 20H,#1
MOV R0,#20H
MOV R7,#10001000B
MOV R6,#4
LOOP:
MOV A,@R0
MOV DPTR,#TAB
MOVC A,@A+DPTR
MOV P0,A
MOV A,R7
LCALL DS1MS
MOV P2,A
RR A
MOV R7,A
INC R0
DJNZ R6,LOOP
LJMP MAIN
DS1MS:
MOV R5,#10
LP:
MOV R4,#248

DJNZ R4,$
DJNZ R5,LP
RET
TAB:
DB 0C0H,0F9H,0A4H,0B0H,99H,92H,82H,0F8H,80H,90H

END

千问 · 2011-5-1 18:14:08

LJMP MAIN ORG 0100HMAIN:
MOV 23H,#4 MOV 22H,#3 MOV 21H,#2 MOV 20H,#1 MOV R0,#20H MOV R7,#10001000B MOV R6,#4LOOP:
MOV A,@R0 MOV DPTR,#TAB MOVC A,@A+DPTR MOV P0,A MOV A,R7 MOV P2,A LCALL DS1MS ;一位亮后，延时mo

千问 · 2011-5-1 18:14:08

DB 里面的值和你所需要显示的值不对应还要检查下