/*-----------------------------------------------------------------------------------
  Pico_Rotary_SSD1306.ino
  -----------------------------------------------------------------------------------
  Raspberry Pi Pico, SSD1306 OLED, Rotary Encoder

  https://forum.arduino.cc/t/pi-pico-and-ssd1306-oled-display/929498

    Pico  ---- SSD1306 OLED display  (I2C communication)
    3.3V  -----  VCC    physical pin 36
    GND   -----  GND    physical pin 38
    GP4   -----  SDA    physical pin 6
    GP5   -----  SCL    physical pin 7

  https://github.com/netguy204/OakOLED
  https://github.com/mathertel/RotaryEncoder

  // Abruf der aktuellen Position
  long getPosition();

  // Abrufen der Richtung, in die der Knopf zuletzt gedreht wurde.
  // 0 = keine Drehung, 1 = im Uhrzeigersinn, -1 = gegen den Uhrzeigersinn
  Direction getDirection();

  // Eine Position einstellen
  void setPosition(long newPosition);

  // Diese Funktion alle paar Millisekunden aufrufen oder einen Interrupt
  // zur Behandlung von Zustandsänderungen des Drehgebers verwenden.
  void tick(void);

  // Gibt die Zeit zwischen der Drehung in ms zurück
  unsigned long getMillisBetweenRotations() const;

  // Gibt die Drehzahl zurück
  unsigned long getRPM();
*/
#define OAK_OLED
//#define ASCII_OLED

#include "RotaryEncoder.h"

#define PIN_IN1     2           // DT
#define PIN_IN2     3           // CLK
#define SW          6           // Button

RotaryEncoder encoder(PIN_IN1, PIN_IN2, RotaryEncoder::LatchMode::FOUR3);


#ifdef OAK_OLED
#include "OakOLED.h"
OakOLED oled;
#endif //OAK_OLED

/*-----------------------------------------------------------------------------------
  encoderPosition - Interrupt Routine
  -----------------------------------------------------------------------------------*/
void encoderPosition()
{
  encoder.tick();
}

/*-----------------------------------------------------------------------------------
  encoderButton - Interrupt Routine
  -----------------------------------------------------------------------------------*/
void encoderButton()
{
  Serial1.println("Button clicked");
}

/*-----------------------------------------------------------------------------------
  -----  S E T U P  -----
  -----------------------------------------------------------------------------------*/
void setup() {
  Serial1.begin(9600);

  // register interrupt routine
  attachInterrupt(digitalPinToInterrupt(PIN_IN1), encoderPosition, CHANGE);
  attachInterrupt(digitalPinToInterrupt(PIN_IN2), encoderPosition, CHANGE);
  attachInterrupt(digitalPinToInterrupt(SW), encoderButton, CHANGE);

  oled.begin();

  oled.setTextSize(1);
  //oled.setTextColor(1);
  oled.setCursor(30, 40); oled.print("Hello Reini");
  oled.setTextSize(2);
  oled.setCursor(0, 0); oled.print("Pos: 0");
  oled.display();

}

/*-----------------------------------------------------------------------------------
  -----  L O O P  -----
  -----------------------------------------------------------------------------------*/
void loop()
{
  static int pos = 0;

  int newPos = encoder.getPosition();
  if (pos != newPos) {

    oled.clearDisplay();
    oled.setTextSize(2);
    oled.setCursor(0, 0); oled.print("Pos: ");
    oled.setCursor(60, 0); oled.print(newPos);
    oled.display();

    // Serial1.print("pos:");
    // Serial1.print(newPos);
    // Serial1.print(" dir:");
    // Serial1.println((int)(encoder.getDirection()));
    pos = newPos;
  }

}