基于单片机时钟设计.doc

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#define uint unsigned int#define uchar unsigned charsbit key1=P34;sbit key2=P35;sbit key3=P36;sbit key4=P37;sbit a=P26;sbit b=P27;sbit led=P10;uchar code table=0x3f,0x06,0x5b,0x4f, 0x66,0x6d,0x7d,0x07, 0x7f,0x6f,0x77,0x7c, 0x39,0x5e,0x79,0x71;void shuma(uchar,uchar,uchar,uchar,uchar,uchar);void delay(uint);uchar num,num1,num2,shi,ge,fen1,fen2,num3,shi1,shi2,num4;void keyscan(); void main() 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;while(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); void shuma(uchar shi,uchar ge,uchar fen2,uchar fen1,uchar shi2,uchar shi1) /数码管循环 a=1;P0=tableshi;a=0;P0=0xef;b=1;P0=0xef;b=0;delay(2);a=1;P0=tablege;a=0;P0=0xff;b=1;P0=0xdf;b=0;delay(2);a=1;P0=tablefen2;a=0;P0=0xff;b=1;P0=0xfb;b=0;delay(2);a=1;P0=tablefen1;a=0;P0=0xff;b=1;P0=0xf7;b=0;delay(2);a=1;P0=tableshi2;a=0;P0=0xff;b=1;P0=0xfe;b=0;delay(2);a=1;P0=tableshi1;a=0;P0=0xff;b=1;P0=0xfd;b=0;delay(2);void delay(uint x) /延迟 uint i,j; for(i=x;i0;i-) for(j=110;j0;j-); void keyscan()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(!key4)shuma(shi,ge,fen2,fen1,shi2,shi1);/TR0=TR0; /定时器的状态void T0_time() interrupt 1 /中断后LED闪烁TH0=(65536-45872)/256;TL0=(65536-45872)%256;num1+;if(num1=20) n