#include <LiquidCrystal.h>

LiquidCrystal lcd(13, 12, 11, 10, 9, 8);

byte AA;

void setup() 
{
  DDRD &= ~(1<<5);
  PORTD|= 1<<5;

  DDRD &= ~(1<<4);
  PORTD |= 1<<4;

  DDRD &= ~(1<<3);
  PORTD |= 1<<3;

  DDRD &= ~(1<<2);
  PORTD |= 1<<2;

  PCICR |= 1<<PCIE2;
  PCMSK2 |= 1<<PCINT18;
  PCMSK2 |= 1<<PCINT19;
  PCMSK2 |= 1<<PCINT20;
  PCMSK2 |= 1<<PCINT21;


  AA = PORTD;


  SREG |= 1<<7;

  lcd.begin(20, 4);
}

void loop() 
{
  delay(1000);
}



ISR(PCINT2_vect)
{

  if((PIND&(1<<2)) == 0 && (PIND&(1<<2)) != (AA&(1<<2)))
  {

    lcd.setCursor(0, 0);
    lcd.print("Komora1 je otvorena ");
  }
  else if((PIND&(1<<2)) != 0 && (PIND&(1<<2)) != (AA&(1<<2)))
  {

    lcd.setCursor(0, 0);
    lcd.print("Komora1 je zatvorena");
    

  }

  if((PIND&(1<<3)) == 0 && (PIND&(1<<3)) != (AA&(1<<3)))
  {
    lcd.setCursor(0, 1);
    lcd.print("Komora2 je otvorena ");
  }
  else if((PIND&(1<<3)) != 0 && (PIND&(1<<3)) != (AA&(1<<3)))
  {
    lcd.setCursor(0, 1);
    lcd.print("Komora2 je zatvorena");

  }


  if((PIND&(1<<4)) == 0 && (PIND&(1<<4)) != (AA&(1<<4)))
  {
    lcd.setCursor(0, 2);
    lcd.print("Komora3 je otvorena ");
  }
  else if((PIND&(1<<4)) != 0 && (PIND&(1<<4)) != (AA&(1<<4)))
  {
    lcd.setCursor(0, 2);
    lcd.print("Komora3 je zatvorena");

  }


  if((PIND&(1<<5)) == 0 && (PIND&(1<<5)) != (AA&(1<<5)))
  {
    lcd.setCursor(0, 3);
    lcd.print("Komora4 je otvorena ");
  }
  else if((PIND&(1<<5)) != 0 && (PIND&(1<<5)) != (AA&(1<<5)))
  {
    lcd.setCursor(0, 3);
    lcd.print("Komora4 je zatvorena");

  }

  AA = PIND;


}