#define SET0(REG,BIT) REG &= ~(1<<BIT)
#define SET1(REG,BIT) REG |= (1<<BIT)
#define TEST(REG,BIT) (REG&(1<<BIT))
#include <LiquidCrystal.h>

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


void setup() 
{

  lcd.begin(16, 2);

  SET0(DDRD, 3);
  SET1(PORTD, 3);

  SET0(DDRD, 2);
  SET1(PORTD, 2);
  
  SREG |= 1<<7;

  EIMSK |= 1<<INT0;
  EIMSK |= 1<<INT1;
  EICRA = 0b00001010;

  SET0(DDRC, 0);

  SET0(ADMUX, REFS1);
  SET0(ADMUX, REFS0);
  SET0(ADMUX, ADLAR);
  SET0(ADMUX, MUX3);
  SET0(ADMUX, MUX2);
  SET0(ADMUX, MUX1);
  SET0(ADMUX, MUX0);


  SET1(ADCSRA, ADEN); // zapne sa prevodnik
  SET0(ADCSRA, ADATE);
  SET0(ADCSRA, ADIE);
  SET1(ADCSRA, ADPS2);
  SET1(ADCSRA, ADPS1);
  SET1(ADCSRA, ADPS0);


  SET0(DDRC, 1);

}

void loop() 
{

}



ISR(INT0_vect)
{
  lcd.setCursor(0,1);
  lcd.println("P:");
  
}

ISR(INT1_vect)
{
  SET1(ADCSRA, ADSC);
  while(TEST(ADCSRA, ADIF) == 0)
  {
  }
  int vysledok = ADCL;
  vysledok = vysledok + (ADCH<<8);

  
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("L:");
  lcd.setCursor(2,0);
  lcd.print(vysledok);
  
  

}