发表于:2006/2/28 11:48:00
#0楼
请大家看一下这个程序有没有问题.LED七段依次显示一些数字.间隔一秒. P0口驱动
ORG 00H
MAIN: MOV R2,#00H
MOV DPTR,#TAB
DSUP: MOV A,R2
MOVC A,@A+DPTR
MOV P0,A
LCALL YSH1S
INC R2
CJNE R2,#0AH,DSUP
AJMP MAIN
YSH1S: MOV R3,#05H
LOOP0: MOV R4,#0C8H
LOOP1: MOV R5,#0FAH
XHD: DJNZ R5,XHD
DJNZ R4,LOOP1
DJNZ R3,LOOP0
RET
TAB: DB 0C0H
DB 92H
DB 92H
DB 0F9H
DB 92H
DB 0C0H
DB 0A4H
DB 0C0H
DB 80H
DB 0C0H
DB 0C0H
DB 80H
DB 0C0H
DB 0F9H
DB 0C0H
DB 92H
DB 82H
DB 92H
DB 82H
END
ORG 00H
MAIN: MOV R2,#00H
MOV DPTR,#TAB
DSUP: MOV A,R2
MOVC A,@A+DPTR
MOV P0,A
LCALL YSH1S
INC R2
CJNE R2,#0AH,DSUP
AJMP MAIN
YSH1S: MOV R3,#05H
LOOP0: MOV R4,#0C8H
LOOP1: MOV R5,#0FAH
XHD: DJNZ R5,XHD
DJNZ R4,LOOP1
DJNZ R3,LOOP0
RET
TAB: DB 0C0H
DB 92H
DB 92H
DB 0F9H
DB 92H
DB 0C0H
DB 0A4H
DB 0C0H
DB 80H
DB 0C0H
DB 0C0H
DB 80H
DB 0C0H
DB 0F9H
DB 0C0H
DB 92H
DB 82H
DB 92H
DB 82H
END