单片机C语言 电子时钟程序.doc

#include#define uint unsigned int#define uchar unsigned char unsigned char key2; bit ding=1; unsigned char Getkey(void);uchar a,n=0,shi,fen,miao; void delay01s(void);uchar LED=0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90;uchar LED1=0x40,0x79,0x24,0x30,0x19,0x12,0x02,0x78,0x00,0x10;/有小数点的 void init(); /函数声明void Delay(unsigned char z);/函数声明void display();/函数声明 /函数声明void main() /函数声明 P1=0xfe;/对P1口赋初值 init(); /函数调用 while(1) /函数调用 key2=Getkey(); switch(key2) case 1: shi+; if(shi=24) shi=0; break;case 2:fen+; if(fen=60) fen=0; break;case 3:if(fen!=0) fen-; if(fen=24) fen=0; break;case 4: ding=ding;default: break; display(); /函数调用 void init() TMOD=0x01; /定时器工作方式选择和赋初值TH0=(65536-50000)/256;TL0=(65536-50000)%256;EA=1;/开总中断ET0=1;/开定时器中断 TR0=1;/启动定时器void timer0() interrupt 1 /中断服务程序 if(ding=1) TH0=(65536-50000)/256;/中断时间50ms TL0=(65536-50000)%256; /定时器重新赋初值 a+; if(a=10) n=n; if(a=20) n=n; a=0; P1=P17; miao+; if(miao=60) miao=0; fen+; if(fen=60) fen=0; shi+; if(shi=24) shi=0; void display()/显示程序 P0=LEDshi/10; P2=(P2&0x0f)|0x70); Delay(4); if(n=0) P0=LEDshi%10; else P0=LED1shi%10; P2=(P2&0x0f)|0xb0); Delay(4); P0=LEDfen/10; P2=(P2&0x0f)|0xd0); Delay(4); P0=LEDfen%10; P2=(P2&0x0f)|0xe0); Delay(4); /*获得键值子程序*/unsigned char bool;/bool 是否松键的标志unsigned char Getkey(void) unsigned char temp,key=0;P2=(P2&0xff)|0x0f;if(P2&0xff)!=(P2&0xff)|0x0f) / 有键按下 /delay01s(); if(P2&0xff)!=(P2&0xff)|0x0f) &(bool=0) / 有键按下 temp=(P2|0xf0); if(temp=1) key=1; else if(temp=2) key=2; else if(temp=4) key=3; else if(temp=8) key=4; bool=1; if(P2&0xff)=(P2&0xff)|0x0f) &(bool=1) bool=0; return key; /返回116键值 /*延时程序*/void delay01s(void) unsigned char j,k;for(j=5;j0;j-) /198 for(k=15;k0;k-)/248 ; void Delay(