Rotary Encoder

// Pins
int encoderPin1 = 2;
int encoderPin2 = 3;
int encoderSwitchPin = 4; //push button switch

// Encoder Magic
volatile int lastEncoded = 0;
volatile long encoderValue = 0;

long lastencoderValue = 0;
long last =0;
int val=0;
int oldval=0;

int lastMSB = 0;
int lastLSB = 0;

// Debounce Stuff for the push button
long btn_debounce_start = 0;
int btn_debounce_duration = 500;



void setup() {
  pinMode(encoderPin1, INPUT);
  pinMode(encoderPin2, INPUT);

  pinMode(encoderSwitchPin, INPUT);


  digitalWrite(encoderPin1, HIGH); //turn pullup resistor on
  digitalWrite(encoderPin2, HIGH); //turn pullup resistor on

  digitalWrite(encoderSwitchPin, HIGH); //turn pullup resistor on

  Serial.begin(9600);

}


void loop(void) {

    if(encoderBtnOK()){
    // this is when the button is pressed
    }
    if(encoderBtnUp()){
        // this when you turn the encoder to one side
    }
    if(encoderBtnDown()){
        // this when you turn the encoder to another side
    }


    // Stuff for the other stuff to work :)
    updateEncoder();
    encoderWatchdog();
}

void updateEncoder(){
  int MSB = digitalRead(encoderPin1); //MSB = most significant bit
  int LSB = digitalRead(encoderPin2); //LSB = least significant bit

  int encoded = (MSB << 1) |LSB; //converting the 2 pin value to single number
  int sum  = (lastEncoded << 2) | encoded; //adding it to the previous encoded value

  if(sum == 0b1101 || sum == 0b0100 || sum == 0b0010 || sum == 0b1011) encoderValue ++;
  if(sum == 0b1110 || sum == 0b0111 || sum == 0b0001 || sum == 0b1000) encoderValue --;

  lastEncoded = encoded; //store this value for next time
}

void encoderWatchdog(){
     //Serial.println(encoderValue);
    if(last != encoderValue){
        if(encoderValue == last+4){
            encoderUp = true;
            last=encoderValue;
        }
        if(encoderValue == last-4){
            encoderDown = true;
            last=encoderValue;
        }
    }
}

boolean encoderBtnOK(){
  if(digitalRead(encoderSwitchPin)){
    if(millis() - btn_debounce_start > btn_debounce_duration){
    btn_debounce_start = millis();
    return true;
  }
  }
  return false;
}

boolean encoderBtnUp(){
  if(encoderUp == true){
    encoderUp = false;
    return true;
  }
  return false;
}

boolean encoderBtnDown(){
  if(encoderDown == true){
    encoderDown = false;
    return true;
  }
  return false;
}