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1、基于天祥单片机的时钟设计，用到的是单片机内部的晶振，没有用时钟芯片操作时使用四个独立按键用的是数码管显示没有用液晶显示随后更新液晶显示系列#include#defineuintunsignedint#defineucharunsignedcharsbitkey1=P3^4;sbitkey2=P3^5;sbitkey3=P3^6;sbitkey4=P3^7;sbita=P2^6;sbitb=P2^7;sbitled=P1^0;ucharcodetable[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x
2、7c,0x39,0x5e,0x79,0x71};voidshuma(uchar,uchar,uchar,uchar,uchar,uchar);voiddelay(uint);ucharnum,num1,num2,shi,ge,fen1,fen2,num3,shi1,shi2,num4;voidkeyscan();voidmain(){TMOD=0x11;EA=1;TH0=(65536-45872)/256;TL0=(65536-45872)%256;ET0=1;TR0=1;TH1=(65536-45872)/256;TL1=(65536-45872)%256;ET1=1;TR1=1;whi
3、le(1){keyscan();if(num2==20){num2=0;num++;if(num==60){num=0;num3=num3+1;if(num3==60){num3=0;num4=num4+1;if(num4==24)num4=0;}}}fen2=num3/10;fen1=num3%10;shi=num/10;ge=num%10;shi2=num4/10;shi1=num4%10;shuma(shi,ge,fen2,fen1,shi2,shi1);}}voidshuma(ucharshi,ucharge,ucharfen2,ucharfen1,ucharshi2,uchars
4、hi1)//数码管循环{a=1;P0=table[shi];a=0;P0=0xef;b=1;P0=0xef;b=0;delay(2);a=1;P0=table[ge];a=0;P0=0xff;b=1;P0=0xdf;b=0;delay(2);a=1;P0=table[fen2];a=0;P0=0xff;b=1;P0=0xfb;b=0;delay(2);a=1;P0=table[fen1];a=0;P0=0xff;b=1;P0=0xf7;b=0;delay(2);a=1;P0=table[shi2];a=0;P0=0xff;b=1;P0=0xfe;b=0;delay(2);a=1;P0=ta
5、ble[shi1];a=0;P0=0xff;b=1;P0=0xfd;b=0;delay(2);}voiddelay(uintx)//延迟{uinti,j;for(i=x;i>0;i--)for(j=110;j>0;j--);}voidkeyscan(){if(key1==0)//S2键键入加一{delay(10);//去抖延时if(key1==0){num4++;if(num4==24)num4=0;while(!key1)shuma(shi,ge,fen2,fen1,shi2,shi1);//经典之处：按下一次按键未松手时，key1=0，停止在while的死循环中，不会再给num加数}}
6、if(key2==0)//S2键键入减一{delay(10);if(key2==0){num3++;if(num3==60){num3=0;num4++;if(num4==24)num4=0;}while(!key2)shuma(shi,ge,fen2,fen1,shi2,shi1);}}if(key3==0)//置零{delay(10);num=0;while(!key3)shuma(shi,ge,fen2,fen1,shi2,shi1);}if(key4==0)//是否定时器{delay(10);if(key4==0);{num4=23;num3=59;num=58;while(!ke
7、y4)shuma(shi,ge,fen2,fen1,shi2,shi1);//TR0=~TR0;//定时器的状态}}}voidT0_time()interrupt1//中断后LED闪烁{TH0=(65536-45872)/256;TL0=(65536-45872)%256;num1++;if(num1==20){num1=0;led=~led;}}voidT1_time()interrupt3//中断后数码管{TH1=(
