#include <mega8.h>
int a;
#asm
   .equ __lcd_port=0x12 ;PORTD
#endasm
#include <lcd.h>
#include<stdio.h>
interrupt [TIM2_OVF] void timer2_ovf_isr(void)
{
a++;
if(a==2){
a=0;
TCNT2=0;
}
}
char str[20];
void main(void)
{
int b,c,d;
PORTB=0x00;
DDRB=0x00;
PORTC=0x00;
DDRC=0x00;
PORTD=0x00;
DDRD=0x00;
ASSR=0x08;
TCCR2=0x02;
TCNT2=0x00;
OCR2=0x00;
TIMSK=0x40;
lcd_init(16);
#asm("sei")
while (1)
      {
      if ((a==0) && (PINB.0==1)){
      b++;
      d=1;
      }  
      if ((a==1) && (PINB.0==0)){
      if(d==1){
      c=b;
      b=0;     
      d=0;
      } 
      } 
      lcd_gotoxy(0,0);
      sprintf(str,"%u",c);
      lcd_puts(str); 
      if (c<10){     
      lcd_gotoxy(1,0);
      lcd_putsf(" ");
      }
      };
}