timer08.c

这是用51单片机开发的电子时钟

#include <reg52.h>
#include<24C02.h>   
#define  uchar unsigned char    
#define  uint  unsigned int
uchar hour=23;min=58;sec=12;
uchar DisplayArray[6]={2,1,8,5,3,2};
uchar count,s1num;
uchar ci=6;
sbit speaker=P3^3;
sbit s1=P1^4;
sbit s2=P1^5;
sbit s3=P1^6;
sbit c3=P1^3;
void delay(uint z)
{
 uint x,y;
 for(x=z;x>0;x--)
   for(y=110;y>0;y--);
}
void ScanSeg7()                             /*数码管扫描显示*/
{
    static uchar s_scanCounter;
    s_scanCounter++;
    if(s_scanCounter>5) s_scanCounter=0;                    /*ptr1>5表示6个数码管都已经扫描过*/
    P0=s_scanCounter|(DisplayArray[s_scanCounter]<<4);
} 

void write_sfm(uchar add,uchar date)
{
  uchar hour,ge;
  hour=date/10;
  ge=date%10;
  DisplayArray[add]=ge;
  DisplayArray[add+1]=hour;
}
void keyscan()
{
    P1=0xff;
    c3=0;
    if(s1==0)
	   {
	      delay(5);
		  if(s1==0)
		  {	
		    sec++;
		    while(!s1);
		    switch(s1num)
		    {
		      case 1: 
			   {
			      write_sfm(0,sec);
		          TR0=0;
				  
			   }        break;
		      case 2:
			    {
				  
				  TR0=0; 
				}		break;
			  case 3:
			    {
				  
				  TR0=0;
				}		break;
			  default:
			    {
				  
				  TR0=1;
				}
		     }
			}//s1键被按下
	 }
	 if(s1num!=0)
         {
           if(s2==0)//第二个键被按下,让时或分或秒加一
            {
             while(!s2);//等待松手
             if(s1num==1)//秒针按下
             {
                sec++;
                if(sec==60) min=0;
                write_sfm(0,sec);
              }
             if(s1num==2)
              {
                min++;
                if(min==60)  min=0;
                write_sfm(2,min);
               
               }
              if(s1num==3)//小时
              {
                hour++;
                if(hour==24)  hour=0;
                write_sfm(4,hour);
                
                }
              }
/*时分秒减*/
        if(s3==0)
        {
         delay(5);
         if(s3==0)
          {
            while(!s3);
            if(s1num==1)
             {
                 sec--;
                 if(sec==-1) sec=59;
                 write_sfm(0,sec);
                 
              }
            if(s1num==2)
            {
                min--;
                if(min==-1)  min=59;
                write_sfm(2,min);
                
             }
             if(s1num==3)
             {
                hour--;
                if(hour==-1)  hour=59;
                write_sfm(4,min);
               
             }

           }
       }
   }

 }


void main()
{
   init();//初始化24C02	
   for(ci=0;ci<6;ci++)
   {
      DisplayArray[ci]=read_add(ci);
   }
   TMOD=0x01;
   TR0=1;
   EA=1;
   ET0=1;

     while(1)
   {

     ScanSeg7() ;
	 if(sec&min&hour==0)
	 {
	   speaker=0;  
	 }
	 
   }
}  
void Timer0Int() interrupt 1
{
  	 TH0=(65536-50000)/256; /*设定Timer0每隔SCAN_CYCLEu中断一次*/
     TL0=(65536-50000)%256;
     count++;
	 keyscan();
	if(count==20)
	 {
	   count=0;
	   sec++;
	   if(sec==60)
	   {
	      sec=0;
		  min++;
		  if(min==60)
		  {
		    min=0;
			hour++;
			if(hour==24)
			{
			hour=0;
			}
			write_sfm(4,hour);
		  }
		  write_sfm(2,min);
	   }
	   write_sfm(0,sec);
	   for(ci=0;ci<6;ci++)
	   {
	     write_add(ci,DisplayArray[ci]);
	   }
	 }
             	
}