14LED点阵显示实验.doc

;文件名:LEDDZforMCU51;功能:LED点阵显示实验;接线:B2模块的JT1B短路帽接至右端;;用导线对应连接双色点阵显示模块的DIN、SCLK、RCLK到;CPU模块的P10、P11、P12。;//*******************************************************;;0100HMAIN:CLREAMOVR2,#0MOVR1,#32;32个字符MOVR0,#40HMOVDPTR,#TABMOVEDATA:;把全部字符复制到40HMOVA,R2MOVCA,***@A+******@R0,AINCR2INCR0DJNZR1,MOVEDATAMOVTMOD,#01H;定时器0工作方式为1MOVTL0,#0AFH;置计数初值MOVTH0,#080H;0FFFFH-3CAFH=50000,50mSMOVR7,#5;软件计数器,循环5次SETBET0;允许T0中断CLRET1;禁止T1中断SETBEASETBTR0CLRR_CLKMOVSP,#60HMOVR3,#080H;第一行A0:MOVR2,#08HMOVR0,#40HLOOP:;MOVDPTR,#TAB;字符首地址MOVR1,#4MOVA,R3RRA;行码右移一位转下一行MOVR3,ALCALLOUTDATAA1:MOVA,***@R0LCALLOUTDATAINCR0DJNZR1,A1SETBR_CLK;显示一行CLRR_CLKDJNZR2,LOOP;下一行LJMPA0LJMPMAINOUTDATA:MOVR6,#8OUT1:LRCLKSETBCLKNOPNOPDJNZR6,OUT1RETINTS_TO:CLREAPUSH0E0HPUSH00HPUSH01HPUSH02HDJNZR7,BACK;软件计数,次数不到返回MOVR7,#5MOVR0,#40HMOVR1,#8SHIFT1:MOVR2,#4CLRCPUSH00HMOVA,R0ADDA,#3MOVR0,AMOVA,***@R0POP00HRLCASHIFT2