/*
  Simple "Hello World" for ILI9341 LCD

  https://wokwi.com/arduino/projects/308024602434470466
*/

#include "SPI.h"
#include "Adafruit_GFX.h"
#include "Adafruit_ILI9341.h"
const int encoder_a = 2; // Pin
const int encoder_b = 3; // Pin 
const int encoder_Z = 4; // Pin

long encoder_pulse_counter = 0;
long direction = 1;

void encoderPinChangeA()
{
    encoder_pulse_counter += 1;
    direction = digitalRead(encoder_a) == digitalRead(encoder_b) ? -1 : 1;
}

void encoderPinChangeB()
{
    encoder_pulse_counter += 1;
    direction = digitalRead(encoder_a) != digitalRead(encoder_b) ? -1 : 1;
}


void encoderPinChangeZ()
{
    encoder_pulse_counter += 1;
   // direction = digitalRead(encoder_a) == digitalRead(encoder_b) ? -1 : 1;
}

#define TFT_DC 9
#define TFT_CS 10
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);

void setup() {
  tft.begin();

  // tft.setCursor(26, 120);
  // tft.setTextColor(ILI9341_RED);
   tft.setTextSize(3);
  // tft.println("Hello, TFT!");

  // tft.setCursor(20, 160);
  // tft.setTextColor(ILI9341_GREEN);
   //tft.setTextSize(2);
  // tft.println("I can has colors?");

 Serial.begin(9600);
    pinMode(encoder_a, INPUT_PULLUP);
    pinMode(encoder_b, INPUT_PULLUP);
    pinMode(encoder_Z, INPUT_PULLUP);

    attachInterrupt(0, encoderPinChangeA, CHANGE);
    attachInterrupt(1, encoderPinChangeB, CHANGE);
    //counting Z pin interruptions
   attachInterrupt(digitalPinToInterrupt(encoder_Z), encoderPinChangeA, HIGH);
   attachInterrupt(digitalPinToInterrupt(encoder_a), speedCalculate, HIGH);

  // Meme reference: https://english.stackexchange.com/questions/20356/origin-of-i-can-haz
}

void loop() 
{
   
 }

 void speedCalculate()
 {
 long speed = encoder_pulse_counter/1024.00*60;

     // For encoder plate with 1024 Pulses per Revolution
    //Serial.print("RPM: ");
      tft.println("RPM:");

    if(direction == 1)
    {
      //Serial.println("Rotated clockwise ⏩");
  tft.println("clockwise");

    }
    else
    {
        tft.println("counterclockwise");

     // Serial.println("Rotated counterclockwise ⏪");

    }
//Printing speed with direction
    //Serial.println(direction*speed);
    encoder_pulse_counter = 0; // Clear variable just before counting again 
    delay(1000);
 }