#include <LiquidCrystal_I2C.h> 
#include <avr/io.h>
#include <avr/interrupt.h>
#include <MsTimer2.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);
// Globals
uint8_t flag = 1;
static unsigned long last_interrupt_time = 0;

/*
class LCD{
  public:
  LiquidCrystal_I2C lcd = LiquidCrystal_I2C(0x27, 16, 2);

    LCD () {
      lcd.init();
      lcd.backlight();
    }

};
*/

class coff{

public:
  void sui(){
    switch (flag){

    case 1:
    
    flag++;
    break;

   }
  }
};

ISR(INTO_vect){
 
  if (millis() - last_interrupt_time > 200) 
  {
  flag++;
}
last_interrupt_time = millis() ;
}

int main (void){
  lcd.init();
  lcd.clear();
  lcd.backlight();
  coff m;
  // Rising edge of INTO generates interrupt 
  EICRA |= (1 << ISC01); 
  EICRA &= ~(1 << ISC00);
  // Enable interrupts for INT0 
  EIMSK |= (1 <<INT0);
  // Enable global interrupts 
  sei(); 
  
  while(true){
  m.sui();
  }
}