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1、程序源代码：ORG0000HLJMPMAINORG000BH;定时器0中断入口地址LJMPINTT0WEEKBITP1.0;定义调星期键HOURBITP1.1;定义调时键MINBITP1.2;定义调分键QINGBITP1.3;定义清零键MAIN:MOVTMOD,#01H;定时器0，工作模式1MOVTH0,#03CH;赋初值，定时50msMOVTL0,#0B0HSETBEA;开中断总开关SETBET0;定时器0中断允许位SETBTR0;开启定时器0MOVR6,#0;计中断次数MOVR5,#0;R5扫描按
2、键的时间间隔MOV20H,#0;秒个位清零MOV21H,#0;秒十位清零MOV22H,#0;分个位清零MOV23H,#0;分十位清零MOV24H,#0;时个位清零MOV25H,#0;时十位清零MOV26H,#1;星期位清零LJMPDISPLAY;清零数据显示;T0中断子程序INTT0:CLREAINCR6;中断次数加一INCR5MOVTH0,#03CHMOVTL0,#0B0H;重新赋初值SETBEARETIJIA_TIME:CJNER6,#20,EXIT;定时器中断20次，1秒到MOVR6,#0SET
3、BP1.7;关闭闹钟INC20H;秒加一MOVA,20HCJNEA,#10,EXIT;如果秒个位等于10，清零MOV20H,#00HINC21H;秒MOVA,21HCJNEA,#6,EXIT;如果秒十位等于6，清零MOV21H,#00HMIAO1:INC22H;MIN:MOVA,22HCJNEA,#10,EXIT;如果分个位等于10，清零MOV22H,#00HINC23HMOVA,23HCJNEA,#6,EXIT;如果分十位等于6，清零CLRP1.7;ssssssMOV23H,#00HMIN1:INC
4、24H;HOUR:MOVA,25HCJNEA,#2,LOOP;如果时十位等于2，检查时个位MOVA,24HCJNEA,#4,EXIT;如果时个位等于4，清零MOV24H,#00H;清零时个位MOV25H,#00H;清零时十位HOUR1:INC26HXINGQI:MOVA,26HCJNEA,#8,EXITMOV26H,#1LJMPEXITLOOP:MOVA,24HCJNEA,#10,EXIT;如果时个位等于10，清零MOV24H,#00HINC25HLJMPEXITEXIT:MOVA,21HCJNEA,
5、#1,DISPLAYSETBP1.7LJMPDISPLAY;加完毕跳转到显示DISPLAY:MOVDPTR,#TABLEMOVA,20HMOVCA,@A+DPTRMOVP0,ASETBP2.7LCALLDELAYCLRP2.7;显示秒个位MOVA,21HMOVCA,@A+DPTRMOVP0,ASETBP2.6LCALLDELAYCLRP2.6;显示秒十位MOVA,22HADDA,#10MOVCA,@A+DPTRMOVP0,ASETBP2.5LCALLDELAYCLRP2.5;显示分个位MOVA,23H
6、MOVCA,@A+DPTRMOVP0,ASETBP2.4LCALLDELAYCLRP2.4;显示分十位MOVA,24HADDA,#10MOVCA,@A+DPTRMOVP0,ASETBP2.3LCALLDELAYCLRP2.3;显示时个位MOVA,25HMOVCA,@A+DPTRMOVP0,ASETBP2.2LCALLDELAYCLRP2.2;显示时十位MOVA,#40HMOVP0,ASETBP2.1LCALLDELAYCLRP2.1;显示"-"MOVA,26HMOVCA,@A+DPTRMOVP0,AS
7、ETBP2.0LCALLDELAYCLRP2.0;显示星期CJNER5,#4,KEY_SCAN;当R5到4时，扫描按键MOVR5,#0KEY_SCAN:JNBWEEK,JIA_XINGQIJNBHOUR,JIA_HOURJNBMIN,JIA_MINJNBQINGQINGLINGLJMPJIA_TIME;无键按下，跳至走时JIA_XINGQI:LCALLDELAY1;消抖延时JNBWEEK,JIA1JIA1:LJMPHOUR1JIA_HOUR:LCALLDELAY1;消抖延时JNBHOUR,JIA2;小
8、时加1JIA2:LJMPMIN1;更新JIA_MIN:LCALLDELAY1;消抖延时JNBMIN,JIA3;分钟加1JIA3:LJMPMIAO1;更新QINGLING:MOV20H,#0;秒个位清零MOV21H,#0;秒十位清零MOV22H,#0;分个位清零MOV23H,#0;分十位清零MOV24H,#0;时个位清零MOV25H,#0;时十位清零MOV26H,#1;星期清零LJMPDISPLAYEXIT0:LJMPJIA_TIMEDELAY:MOVR7
