#include <tiny13.h>

// Declare your global variables here

int tmp=0,front=0;

// Pin change interrupt service routine
interrupt [PC_INT0] void pin_change_isr(void)
{
if (PINB.1 == 1)
      {
      front = 1;
      tmp = 0;
      }
else
      {      
      if (tmp < 1150) tmp = 1150;
      if (tmp > 1915) tmp = 1915;
      OCR0A = (tmp-1150)/3;
      front = 0;
      }
}

void main(void)
{
// Declare your local variables here

// Crystal Oscillator division factor: 1
#pragma optsize-
CLKPR=(1<<CLKPCE);
CLKPR=(0<<CLKPCE) | (0<<CLKPS3) | (0<<CLKPS2) | (0<<CLKPS1) | (0<<CLKPS0);
#ifdef _OPTIMIZE_SIZE_
#pragma optsize+
#endif

// Port B initialization
PORTB=0b11111111;
DDRB=0b00000001;
PORTB.0 = 0;

// External Interrupt(s) initialization
        GIMSK = 0b00100000;
        PCMSK = 0b00000010;  // Прерывание по перепаду     
          
// Таймер     
    TCCR0A = 0b10000001;  // управление выходом, ШИМ
    TCCR0B = 0x01;  // делителя нет   

// Global enable interrupts   )
#asm("sei")

while (1)
{
        if (front == 1) tmp++;    
}

}