#include <avr/io.h>
#include <avr/interrupt.h>

volatile int luminosity=0;
volatile int stage=0;
volatile int button_pressed =0;
ISR(TIMER1_COMPA_vect)//when 5ms passes
{
  button_pressed=0;
  TCCR1B=0b00001000; //turn off the timer
}

ISR(INT0_vect) 
{
  if(stage < 9 && button_pressed ==0)
  {
    stage+=1;
    luminosity+=28;
    button_pressed =1;
    TCCR1B=0b00001100; // turn on the timer
  }
}
ISR(INT1_vect) 
{
  if(stage>0 && button_pressed == 0)
  {
    stage-=1;
    luminosity-=28;
    button_pressed =1;
    TCCR1B=0b00001100; // turn on the timer
  }
}


int main(void){
  init();
  DDRD=0b00100000; // - pin2 and 3 as inputs, 5 as output
  PORTD=0b00001100; // - use pullup resistor on 2 and 3
  EIMSK=0x03; // - activate extint on both pins
  EICRA=0xA; //-falling edge interrupt


  //0b00000101;
  //timer
  TCCR1A=0b00000000;// ---- \/
  TCCR1B=0b00001000; //- compare mode
  OCR1A = 0b000100110111; // 311 in binary - count at 5ms
  TIMSK1 |= (1 << OCIE1A); // compare-interrupt
  sei();
  while (true)
  {
    analogWrite(5,luminosity);
    
    if(stage==0)
    {
      DDRD=0<<7;
      DDRB=0b00111111;
    }
    else if(stage==1)
    {
      DDRD=0<<7;
      DDRB=0b00011000;
    }
    else if(stage==2)
    {
      DDRD=1<<7;
      DDRB=0b00110110;
    }
    else if(stage==3)
    {
      DDRD=1<<7;
      DDRB=0b00111100;
    }
    else if(stage==4)
    {
      DDRD=1<<7;
      DDRB=0b00011001;
    }
    else if(stage==5)
    {
      DDRD=1<<7;
      DDRB=0b00101101;
    }
    else if(stage==6)
    {
      DDRD=1<<7;
      DDRB=0b00101111;
    }
    else if(stage==7)
    {
      DDRD=0<<7;
      DDRB=0b00111000;;
    }
    else if(stage==8)
    {
      DDRD=1<<7;
      DDRB=0b00111111;
    }
    else if(stage==9)
    {
      DDRD=1<<7;
      DDRB=0b00111101;
    }
    
  }
  return 0;
}