din0._c

这个是用AVR编写的程序

#include<iom16v.h>
#include<macros.h>
#include<stdio.h>
#define uint unsigned int
#define uchar unsigned char
uchar num=0;
#pragma data:code
 const  table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,
                  0x39,0x5e,0x79,0x71};
#pragma interrupt_handler miao:5		  
void delay(uint z)
   {uint x,y;
    for (x=0;x<z;x++)
	  for(y=0;y<1104;y++);
      }
	 void show(uchar x,uchar y)
   {DDRA|=0x18;
    DDRB=0xff;
    PORTB=table[x];
	PORTA|=BIT(3);
	PORTA&=~BIT(3);
	PORTB=0XFF;
	PORTB&=~BIT(y);
	PORTA|=BIT(4);
	PORTA&=~BIT(4);
	delay(1);}
 /* void show(uchar x,uchar y)
   {DDRA|=0X18;
    DDRB=0XFF;
	PORTB=table[x];
	PORTA|=BIT(3);
	PORTA&=~BIT(3);
	PORTB=0XFF;
	PORTB&=~BIT(y);
	PORTA|=BIT(4);
	PORTA&=~BIT(4);
	delay(1);
   }*/	
   void init() //定时器0的初始化
    {TCNT0=0X01;
	 TCCR0=0x05;
	 TIMSK|=BIT(2);
	 SREG|=BIT(7);
	 }
	 
	  }
	/*   void init() //定时器2的初始化
    {TCNT2=0X01;
	 TCCR2=0x05;
	 TIMSK|=BIT(6);
	 SREG|=BIT(7);
	 }
	  void miao() //中断函数2
	  {if(num==1000)
	    {num=0;}
	   else num++;
	   TCNT2=0X01;
	  }*/
	 void miao() //中断函数0
	  {if(num==1000)
	    {num=0;}
	   else num++;
	   TCNT0=0X01;
	  }
	  			  
  void main(void)
    {uchar fen=0;
	init();
	while(1)
      {
	  if(num==1000)
	  {num=0;
	   if(fen==59)
	   {fen=0;
	   }
	   else fen++;
	   }
	 show(fen/10,0);
	 show(fen%10,1);
	  }
}