main.c

应用在51单片机控制的数字时钟上

#ifndef __AT89X51_H__
#include <at89x51.h>
#endif

#include <lcd.h>
#include <stdio.h>

sbit SET = P1^3;
sbit ON = P1^4;
sbit BEEP = P1^5;

int ms = 0;
unsigned char sec = 0;
char ptime[16];

int  state = 0;	
																			   
bit stopwatch = 0;		  		   //功能开关变量 
bit alarm = 0;
bit count = 0;
			
bit  time_up_key = 0;			   //提示开关变量
										  
int  hour = 12, minuter = 0, second = 0, msecond =0;        //标准时间
int  stopw_minuter = 0, stopw_second = 0, stopw_msec = 0;	 //秒表时间
int  count_hour = 0, count_minuter=0, count_second = 0;		//倒计时时间
int  alarm_hour = 0,  alarm_minuter = 0;					//闹钟时间

void init()
{
    TMOD = TMOD | 0x02;
    TH0 = 56;
    TL0 = 0;
    IE = 0x9f;
    IT1 = 1;
    IT0 = 1;
    TR0 = 1;

}

void time_up()								
{
     unsigned char i;
	 for (i=200; i>0; i--)
	 ;                                                           //调用音乐程序！！
     BEEP = !BEEP;
	
}
/*设置各种状态下时间小时位 或 清零时分秒位*/
void key_hour_add () interrupt 0							
{
    switch( state )
	{
	  case 0 : 	hour = (++hour) % 24;
      case 1 :  alarm_hour = (++alarm_hour) % 24;					 
	  case 2 :  {
		                if( !count )
					    {
				            count_hour = (++count_hour) % 24;
					    }
					      else
					    {	
					        count_hour = 0;
							count_minuter = 0;
							count_second = 0;
							
					    }
				 }
	  case 3 :  {	 
	                  stopw_minuter = 0; 
					  stopw_second = 0;
					  stopw_msec = 0;
				} ;
	 }
      
	   
}
/*设置各种状态下分钟位 或 清零时分秒位*/
void  key_minuter_add () interrupt 2
{
     switch (state)
	 { 
	    case 0 :  minuter = (++minuter) % 60;               
		case 1 :  alarm_minuter = (++alarm_minuter) % 60;
		case 2 :  {
		                if ( !count )
					    {
				             count_minuter = (++count_minuter) % 60;
					    }
					      else
					      {	
					         count_hour = 0;
							 count_minuter = 0;
							 count_second = 0;
							
					       }
				  }
		case 3 :  {	 
		                stopw_minuter = 0;
		                stopw_second = 0;
						stopw_msec = 0;	
				  } 
	}
}
void  run_time()
{
	if (23 == hour&&59==minuter&&59==second)
	{
	     hour = 0;
		 minuter =0;
		 second = 0;
	}
	   else  if (59==minuter&&59==second)
	  {
			 hour++;  
			 minuter = 0;
		     second = 0;
	   }
		   else  if (59 == second)
		   {
			     minuter++;
				 second = 0;
			}
			     else 
			     {
					 second++;
			     }
   
} 
void run_stopwatch()
{
    if (59==stopw_minuter&&59 ==stopw_second&&9 ==stopw_msec)
        {
			  stopw_minuter = 0;
			  stopw_second = 0;
			  stopw_msec = 0;
		}
			 else  if (59==stopw_second&&9==stopw_msec)
			 {
			       stopw_minuter++;  
			       stopw_second = 0;
				   stopw_msec = 0;
			  }
			      else  if (9==stopw_msec)
			      {
			           stopw_second++;
				       stopw_msec = 0;
			      }
			         else 
			        {
					   stopw_msec++;
					}
	 
}
void  run_count()
{
    if (0==count_hour&&0==count_minuter&&0 ==count_second )
	{
	     time_up_key = 1;
		 count = !count;
	}
	   else  if (0==count_minuter&&0==count_second )
	  {
			 count_hour--;  
			 count_minuter = 59;
		     count_second = 59;
	   }
		   else  if (0==count_second )
		   {
			     count_minuter--;
				 count_second = 59;
			}
			     else 
			     {
					 count_second--;
			     }
    
} 


void run_alarm()
{
    if (alarm_hour==hour&&alarm_minuter==minuter )	   //判断闹钟
	    {
		    time_up_key = 1;
			alarm = !alarm;
		}
}
/*刷新屏幕时间*/
void  flush_src()
{ 
      switch (state)
	  {
			case 0 :{
			              sprintf(ptime,"******time******");
                          lcd_write_str(ptime, 1, 0);
				          sprintf(ptime,"    %02d:%02d:%02d    ", hour, minuter, second);
                          lcd_write_str(ptime, 2, 0);
						  break;
					}
		    case 1 :{	  if (alarm)
			                  sprintf(ptime,"****alarm on****");
						  else
						      sprintf(ptime,"****alarm off***");  
                          lcd_write_str(ptime, 1, 0);
				          sprintf(ptime,"     %02d:%02d      ", alarm_hour, alarm_minuter);
                          lcd_write_str(ptime, 2, 0);
						  break;
					}
		   case  2 :{	  
		                 if (count)
		                      sprintf(ptime,"****count on****");
						 else
						       sprintf(ptime,"****count off***");
                          lcd_write_str(ptime, 1, 0);
				          sprintf(ptime,"    %02d:%02d:%02d    ", count_hour, count_minuter, count_second);
                          lcd_write_str(ptime, 2, 0);
						  break; 
					}
		  case  3 :{
		                   if (stopwatch)
		                        sprintf(ptime,"*stopwatch on***");
						   else
						        sprintf(ptime,"*stopwatch off*");
						   lcd_write_str(ptime, 1, 0);
				           sprintf(ptime, "     %02d:%02d:%1d    ", stopw_minuter, stopw_second, stopw_msec );
                           lcd_write_str(ptime, 2, 0);
						   break;
					}	   

	}

}

void  time0 ()interrupt 1
{
    ms++;
	if (500 == ms)  // 100ms到
	 {
	     if(1 == stopwatch)
		     run_stopwatch();
		
	 	 sec++;
	     if (10 == sec)  //1秒到
	     {
	          run_time();
		      if ( 1 == count )
		          run_count();
			
			  if ( 1 == alarm )
			      run_alarm();
			  sec = 0;
	     }
	    flush_src(); 
	    ms = 0;
	 } 
}
 /* set 按钮功能函数 */
 void set_state_key()
 { 
    unsigned char i = 100, j = 100;
	SET = 1;
    if (0 == SET)
	    {
		  for (i=200; i>0; i--)
		     for (j=200; j>0; j--)
			 ;
			if (0 == SET)
			{
		         state = (++state) % 4;
				 
		    }
       }
}  

/* on/off 按钮功能函数 */
void  set_on_key()
{
   char i = 100, j = 100;
   ON = 1;
   if (0 == ON)
   {
       for (i=200; i>0; i--)
		  for (j=200; j>0; j--)
		  ;
	   if (0 == ON)
	   {	
	       if (1 == time_up_key)	
			      {
				    time_up_key = 0;
					return ;
					}
	         
           switch (state)
          {
              case 0 :   ;
              case 1 :  {	
			                alarm = !alarm;
							break;
						}
	          case 2 :  {
			                count = !count;
							break;
						}
			  case 3 :	{
			                stopwatch = !stopwatch;
							break;
						}
		  }
		     
	   }
   
}
	  
} 

void  main()
{
    lcd_init();
	init();
	while(1)
	{
	   set_state_key();
	   set_on_key();
	   if (time_up_key)
	   {
		   time_up();
	   }
	}
}