资源描述：
《电子钟四位数码管电路原理图.doc》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、程序：#include#defineucharunsignedchar#defineuintunsignedintucharnum[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};uchart,s=0,m=11,h=0,qian=0,bai=0,shi=0,ge=0,s0=0,m0=0,h0=0,qian0=0,bai0=0,shi0=0,ge0=0,n1=0;sbitkey1=P1^0;//功能sbitkey2=P1^1;//加一sbit
2、key3=P1^2;//减一sbitkey4=P1^3;//查看秒数bitmm=0;sbitbeep=P2^3;uinta;voiddelay_1ms(uintz){uintx,y;for(x=z;x>0;x--)for(y=110;y>0;y--);}voiddelay(uinti){uintj;for(;i>0;i--)for(j>19;j>0;j--);}/*voidclock(){for(a=0;a<=50;a++){beep=1;delay_1ms(200);beep=0;delay_1ms(200);}}
3、*/voidtimer()interrupt1{TH0=(65536-50000)/256;TL0=(65536-50000)%256;t++;if(t==20){s++;t=0;if(s==60){m++;s=0;if(m==60){h++;m=0;if(h==24)h=0;}}}}voiddisplay(ucharh,ucharm,uchars){qian=h/10;bai=h%10;shi=m/10;ge=m%10;P0=num[qian];P2=0xef;delay_1ms(2);P0=0xff;P0=num
4、[bai];P2=0xdf;delay_1ms(2);P0=0xff;P0=num[shi];P2=0xbf;delay_1ms(2);P0=0xff;P0=num[ge];P2=0x7f;delay_1ms(2);P0=0xff;}voiddisplay0(ucharh0,ucharm0,uchars0){qian0=h0/10;bai0=h0%10;shi0=m0/10;ge0=m0%10;P0=num[qian0];P2=0xef;delay_1ms(2);P0=0xff;P0=num[bai0];P2=0xd
5、f;delay_1ms(2);P0=0xff;P0=num[shi0];P2=0xbf;delay_1ms(2);P0=0xff;P0=num[ge0];P2=0x7f;delay_1ms(2);P0=0xff;}voidkeyscan()//按键扫描{if(key4==0)mm=!mm;while(!key4)display(m,s,0);if(key1==0){mm=0;delay(20);//消抖if(key1==0)//功能选择{TR0=0;n1++;while(!key1)display(h,m,s);if
6、(n1==7){TR0=1;n1=0;}}}if(n1!=0){if(n1==1){if(key2==0)//调时{//加delay(20);if(key2==0){h++;if(h==24)h=0;}while(!key2)display(h,m,s);}elseif(key3==0)//减{delay(20);if(key3==0){if(h==0)h=24;h--;}while(!key3)display(h,m,s);}}if(n1==2){if(key2==0)//调分{delay(20);if(key2=
7、=0){m++;if(m==60)m=0;}while(!key2)display(h,m,s);}elseif(key3==0){delay(20);if(key3==0){if(m==0)m=60;m--;}while(!key3)display(h,m,s);}}if(n1==3){if(key2==0)//调秒{delay(20);if(key2==0){s++;if(s==60)s=0;}while(!key2)display(m,s,0);}elseif(key3==0){delay(20);if(key
8、3==0){if(s==0)s=60;s--;}while(!key3)display(m,s,0);}}if(n1==4){if(key2==0)//调闹钟时{//加delay(20);if(key2==0){h0++;if(h0==24)h0=0;}while(!key2)display0(h0,m0,s0);}elseif(key3==0
