timer.c

基于89S52的电子时钟

#include "timer.h"
#include "main.h"
#include "1602.h"
#include "KEYS.h"
unsigned char time_1s_ok=0;
unsigned int year;
volatile unsigned char week=2,second,minute=0,hour,day=6,month=6;  //分别保存秒、分、时、天、月、年的变量
unsigned char counter_50ms=0;             //保存多少个50毫秒的变量
unsigned char days_of_month;            //保存该月多少天的变量

void Count_1_interrup(void) interrupt 3     //定时器0中断处理函数
{
 EA=1; //允许定时器0中断
TL1=0xF0;
TH1=0xD8;
ScanKey();  
}
void timer0_isr(void) interrupt 1 using 1      //定时器0中断处理函数
{
 TL0=0xB9;
 TH0=0x40;                             //定时器重装。定时50mS中断一次 
 if(++counter_50ms>=20)                  //1秒到
  {
   time_1s_ok=1;
   counter_50ms=0;                     //清50毫秒计数
   second++;                           //秒加1
   if(second==60)                      //如果秒到60
    {
     second=0;                         //秒清0
     minute++; 
     //分加1
     if(minute==60)                    //如果分到60
      {
       minute=0;                       //分清0
       hour++;                         //小时加1	   
       if(hour==24)                    //如果小时到24
        {
         hour=0;                       //小时清零
         week++;
		 if(week>7)
		 week=1;	
          switch(month)
       {
       case 1:
        case 3:
         case 5:
          case 7:
            case 8:
             case 10:
               case 12:if(++day>31)
                {
                 day=1;   
                if((++month>12)||(month==0))
	                   {
	                     month=1;
	                      ++year;
	                    }
		                }
		          	break;
      case 4:
       case 6:
        case 9:
          case 11:if(++day>30)
          {
           day=1;   
           if((++month>12)||(month==0))
	        {
	        month=1;
	        ++year;
	        }
			}
			break;
        case 2:
         if(((year%4)==0)&&((year%100)!=0))
	     {
	     if(++day>29)
          {
           day=1;   
           if((++month>12)||(month==0))
	        {
	        month=1;
	        ++year;
	        }
			}
		  }
        else 
         {
           if(++day>28)
           {
           day=1;   
           if((++month>12)||(month==0))
	        {
	        month=1;
	        ++year;
	        }
           }
         }
	   break;
       default:break;
       }                 //天置1          
        }
        }
      }
    }
  } 


void display_time(void)
{
WriteCommandLCM(0x80,0);
LCD_printc(year/1000%10+48);
LCD_printc(year/100%10+48);
LCD_printc(year/10%10+48);
LCD_printc(year%10+48);

LCD_printc('-');

LCD_printc(month/10%10+48);
LCD_printc(month%10+48);

LCD_printc('-');

LCD_printc(day/10%10+48);
LCD_printc(day%10+48);
WriteCommandLCM(0x8c,1);
switch(week)
{
case 1:LCD_prints("Mon.");break;
case 2:LCD_prints("Tue.");break;
case 3:LCD_prints("Wed.");break;
case 4:LCD_prints("Thu.");break;
case 5:LCD_prints("Fri.");break;
case 6:LCD_prints("Sat.");break;
case 7:LCD_prints("Sun.");break;
default:break;
}
WriteCommandLCM(0x80+0x40,1);
LCD_printc(' ');//用来清除闹钟标识
LCD_printc(' ');

LCD_printc(hour/10%10+48);
LCD_printc(hour%10+48);

LCD_printc(':');

LCD_printc(minute/10%10+48);
LCD_printc(minute%10+48);

LCD_printc(':');

LCD_printc(second/10%10+48);
LCD_printc(second%10+48);
}