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1、8×8程序:ORG0000HLJMPSTARTORG0080HSTART:;P2口接行线,P3口接列线NOPMOVR3,#3;产生从右到左的竖柱。并显示3次LOP2:MOVR4,#8;竖柱从右到左需要经过8次循环MOVR2,#0;从第0列开始扫描LOP1:MOVP2,#0FFH;行线置0FFH,每根行线都置高电平1MOVDPTR,#TABAMOVA,R2;从第0列开始,逐列扫描MOVCA,@A+DPTR;查表得列线值MOVP3,A;送列线值INCR2;扫描下一列LCALLDELAYDJNZR4,LOP1;从
2、右到左是否扫描完成DJNZR3,LOP2;总共显示3次MOVR3,#3;产生从左到右的竖柱。并显示3次LOP4:MOVR4,#8MOVR2,#7LOP3:MOVP2,#0FFHMOVDPTR,#TABAMOVA,R2MOVCA,@A+DPTRMOVP3,ADECR2LCALLDELAYDJNZR4,LOP3DJNZR3,LOP4MOVR3,#3;产生从上到下的横柱。并显示3次LOP6:MOVR4,#8MOVR2,#0LOP5:MOVP3,#00HMOVDPTR,#TABBMOVA,R2MOVCA,@A+DP
3、TRMOVP2,AINCR2LCALLDELAYDJNZR4,LOP5DJNZR3,LOP6MOVR3,#3;产生从下到上的横柱。并显示3次LOP8:MOVR4,#8MOVR2,#7LOP7:MOVP3,#00HMOVDPTR,#TABBMOVA,R2MOVCA,@A+DPTRMOVP2,ADECR2LCALLDELAYDJNZR4,LOP7DJNZR3,LOP8LCALLSTARTDELAY:;延时子程序MOVR5,#20D2:MOVR6,#20D1:MOVR7,#248DJNZR7,$DJNZR6,D1
4、DJNZR5,D2RETTABA:DB0FEH,0FDH,0FBH,0F7H,0EFH,0DFH,0BFH,07FH;行置1,列采用逐行扫描TABB:DB01H,02H,04H,08H,10H,20H,40H,80H;列置0,行采用逐行扫描ENDORG0000HLJMPSTARTORG0080HSTART:;P2口接行线,P3口接列线LOP2:MOVR4,#8;竖柱从右到左需要经过8次循环MOVR2,#0;从第0列开始扫描LOP1:MOVDPTR,#TABAMOVA,R2;从第0列开始,逐列扫描MOVCA,
5、@A+DPTR;查表得列线值MOVP3,ACPLAMOVP2,A;送列线值INCR2;扫描下一列LCALLDELAYDJNZR4,LOP1;从右到左是否扫描完成LOP4:MOVR4,#8MOVR2,#7LOP3:MOVDPTR,#TABAMOVA,R2MOVCA,@A+DPTRMOVP3,ACPLAMOVP2,ADECR2LCALLDELAYDJNZR4,LOP3SJMPSTARTDELAY:;延时子程序MOVR5,#30D2:MOVR6,#20D1:MOVR7,#248DJNZR7,$DJNZR6,D1D
6、JNZR5,D2RETTABA:DB0FEH,0FCH,0F8H,0F0H,0E0H,0C0H,80H,00H;列置1,行采用逐行扫描END