time.c

ATmegal128的混合中断编程

#include<iom128v.h>
unsigned char second;
unsigned char minute;
unsigned char hour;
unsigned char time[9];
unsigned char sound=0;
extern unsigned char keytime;
extern unsigned char keypad(void);
extern void cls(unsigned x,unsigned y,unsigned char high,unsigned char width);
extern void asc_tran(unsigned char x,unsigned char y,unsigned char *asc_p);
extern void ocmj_write(unsigned char data);
extern void hz_tran(unsigned char x,unsigned char y,unsigned char *hz_p);
void timer0_init(void)
{
 TCCR0 = 0x00; //stop
 ASSR = 0x08; //set async mode
 TCNT0 = 0x00; //set count
 TCCR0 = 0x05; //start timer
}
#pragma interrupt_handler timer0_ovf_isr:17
void timer0_ovf_isr(void)
{
 TCNT0 = 0x00; //reload counter value
 keytime++;
 if(second>=59)
   {
    second=0;
	if(minute>=59)
	  {
	   minute=0;
	   if(hour>=23)
	     {
		  hour=0;
		 }
	   else
	     {
		  hour++;
		 }	 
	  }
	else
	  {
	   minute++; 
	  }  
   }
 else
   {
    second++;
   }  
 if((PIND&0b00100000)==0) sound=1;  
 if (minute==0)
     {
	  if (sound==0)
	      TIMSK|=0x40;
	  else
	      TIMSK&=0xbf;	  
	 } 
 else
     {
	  TIMSK&=0xbf;
	  sound=0;
	 }	   
}
void timetoasc(void)
   {
    unsigned char i;
	unsigned char temp;
	temp=hour;
    for(i=0;i<2;i++)
	   {
	    time[1-i]=temp%10+0x30;
		temp=temp/10;
	   }
	time[2]=':';   
	temp=minute;
    for(i=0;i<2;i++)
	   {
	    time[4-i]=temp%10+0x30;
		temp=temp/10;
	   }
	time[5]=':';
	temp=second;
    for(i=0;i<2;i++)
	   {
	    time[7-i]=temp%10+0x30;
		temp=temp/10;
	   }
	time[8]=0;
	cls(0,3,1,8);
	asc_tran(4,52,time);
   }
void timer2_init(void)
{
 TCCR2 = 0x00; 
 TCNT2 = 0xe1; 
 TCCR2 = 0x03;
}
#pragma interrupt_handler timer2_ovf_isr:11
void timer2_ovf_isr(void)
{
  static unsigned int i;
  TCNT2 = 0xe1; //reload counter value
  i++;
  if(i<800)
     {
      PORTB^=0x80;
	 }
  if(i>1600)
      i=0; 	  	
}   
void timecal(void)
   {
    unsigned char temp,step;
	ocmj_write(0xf4);
	hz_tran(2,1,"输入时间");
	hz_tran(1,2,"按");
	asc_tran(4,36,"SHIFT");
	hz_tran(5,2,"确定");
	asc_tran(4,52,"__:__:__");
	for(temp=0;temp<9;temp++)
	   {
	    time[temp]='_';
	   }
	time[2]=':';
	time[5]=':';
	time[8]=0;   
	step=0;
	do
	  {
	   temp=keypad();
	   if(((temp&0x7f)!=0x7f)&((temp&0x7f)<0x0a))
	      {
		   switch (step)
		       {
			    case 0:{
					    if (temp<3)
					       {
						    hour=temp*10;
							time[0]=temp+0x30;
							step++;
						   }
					    break;	   						   
					   }
				case 1:{
					    if(hour<20)
						  {
						   hour+=temp;
						   time[1]=temp+0x30;
						   step++;
						  }
						else
						  {
						   if(temp<4)
						     {
						      hour+=temp;
						      time[1]=temp+0x30;
						      step++;							  
							 }
						  }
						break;  
					   }
				case 2:{
				        if (temp<6)
						   {
						    minute=temp*10;
							time[3]=temp+0x30;
							step++;						    
						   }
						break;   
				       }
				case 3:{
				        minute+=temp;
						time[4]=temp+0x30;
						step++;
						break;
				       }
				case 4:{
				        if(temp<6)
						  {
						   second=second*10;
						   time[6]=temp+0x30;
						   step++;
						  }
						break;  
				       }				  
				case 5:{
				        second+=temp;
					    time[7]=temp+0x30;
						step++;
						break;
				       }
				default:
				        {
	                     for(step=0;step<9;step++)
	                        {
	                         time[step]='_';
                        	}
	                     time[2]=':';
	                     time[5]=':';
	                     time[8]=0;   
	                     step=0;						
						}			   
			   }
		   cls(0,3,1,8);
	       asc_tran(4,52,time);
		  }
	  }
	while((temp&0x80)!=0x80);  
   }