#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include "RTClib.h"
RTC_DS1307 rtc;
LiquidCrystal_I2C lcd(0x27, 16, 2);

#define encoderClk 8      //Pin 1 from rotary encoder
#define encoderDt 9     //Pin 2 from rotary encoder
#define encoderSw 3
int encoderPos = 0;
int encoderLast = 0;

//Vraiables for rotary encoder state detection
int clk_State;
int Last_State;
bool dt_State;

float set_temperature = 0.0;
float elapsedTime, Time, timePrev;
int menu_activated =1;

void setup() {
  Serial.begin(9600);

  Time = millis();

  Last_State = (PINB & B00000001);      //Detect first state of the encoder

  PCICR |= (1 << PCIE0);    //enable PCMSK0 scan
  PCMSK0 |= (1 << PCINT0);  //Set pin D8 trigger an interrupt on state change.
  PCMSK0 |= (1 << PCINT1);  //Set pin D9 trigger an interrupt on state change.
  PCMSK0 |= (1 << PCINT3);  //Set pin D11 trigger an interrupt on state change.

  pinMode(11, INPUT);
  pinMode(9, INPUT);
  pinMode(8, INPUT);

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

void loop() {

  //lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Set   I  value  ");
  lcd.setCursor(0, 1);
  lcd.print(set_temperature);


}

//The interruption vector for push button and rotary encoder
ISR(PCINT0_vect) {
  if (menu_activated == 1)
  {
    clk_State =   (PINB & B00000001); //pin 8 state? It is HIGH?
    dt_State  =   (PINB & B00000010);
    if (clk_State != Last_State) {
      // If the data state is different to the clock state, that means the encoder is rotating clockwise
      if (dt_State != clk_State) {
        set_temperature = set_temperature + 1 ;
      }
      else {
        set_temperature = set_temperature -1;
      }
    }
    Last_State = clk_State; // Updates the previous state of the clock with the current state
  }

   //Push button was pressed!
  if (PINB & B00001000) //Pin D11 is HIGH?
  {       
   // button_pressed = 1;
    Serial.print("Butona basıldı");
    
  } 
}