int LED_BUILTIN = 33;
#include <Wire.h>
#include "SPI.h"
#include "Adafruit_GFX.h"
#include "Adafruit_ILI9341.h"

#define TFT_DC 2
#define TFT_CS 15



Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);

const float offset = 0;
const float vt_factor = 1.4; //1.35

const int Regler = 0;
const int CLK = 32;
const int Start = 26;

float temp_c1;
float temp_c2;
float temp_c3;
int Temperatur1 = 34;
int Temperatur2 = A0;
int Temperatur3 = A0;

int y;
int Zustand = 0;
int zealer = 0;
int counter = 200;
unsigned long last_run = 0;

void setup() {
  pinMode(Regler, INPUT);
  pinMode (LED_BUILTIN, OUTPUT);
  pinMode(Temperatur1, INPUT);
  pinMode(Temperatur2, INPUT);
  pinMode(Temperatur3, INPUT);

  Serial.begin (115200);
attachInterrupt(digitalPinToInterrupt(CLK), shaft_moved, FALLING);
tft.begin();
  tft.setRotation(3);
  

  xTaskCreatePinnedToCore (
    loop2,     // Function to implement the task
    "loop2",   // Name of the task
    1000,      // Stack size in words
    NULL,      // Task input parameter
    0,         // Priority of the task
    NULL,      // Task handle.
    0          // Core where the task should run
  );
    xTaskCreatePinnedToCore (
    test,     // Function to implement the task
    "test",   // Name of the task
    1000,      // Stack size in words
    NULL,      // Task input parameter
    1,         // Priority of the task
    NULL,      // Task handle.
    1          // Core where the task should run
  );
      xTaskCreatePinnedToCore (
    loop4,     // Function to implement the task
    "loop4",   // Name of the task
    1000,      // Stack size in words
    NULL,      // Task input parameter
    1,         // Priority of the task
    NULL,      // Task handle.
    1          // Core where the task should run
  );
}
void clearTextArea(int x, int y, int width, int height) {
  tft.fillRect(x, y, width, height, ILI9341_BLACK); // Hintergrundfarbe
}
ICACHE_RAM_ATTR void shaft_moved() {
  if (millis() - last_run > 5) {
    if (digitalRead(Regler) == LOW) {
      counter++;
      if (counter > 400) counter = 400;
    }
    if (digitalRead(Regler) == HIGH) {
      counter--;
      if (counter < 200) counter = 200;
    }
    last_run = millis();
  }
}
// the loop function runs over and over again forever
void loop() {
  Serial.println(zealer);
  Serial.println(counter);
  
  clearTextArea(20, 120, 200, 39);
  clearTextArea(20, 180, 400, 30);
  
  tft.setCursor(20, 120);
  tft.setTextColor(ILI9341_RED);
  tft.setTextSize(3);
   tft.print(temp_c1);
   tft.setCursor(20, 180);
  tft.print("Soll Temp.: "); tft.print(counter); tft.print((char)247); tft.println("C");
  Serial.println (xPortGetCoreID());
  
}

// the loop2 function also runs forver but as a parallel task
void loop2 (void* pvParameters) {
  while (1) {
    int T1 = analogRead(Temperatur1);
    temp_c1 = ((T1 / vt_factor) + offset);
    Serial.print ("Hello");
    Serial.print (" World from loop2() at ");
    Serial.println (xPortGetCoreID());
    
  }
}

void test (void* pvParameters) {
  while (1) {
 
  
  }
}

void loop4 (void* pvParameters) {
  while (1) {
    Serial.print ("Hello");
    delay (500); // wait for half a second
    Serial.print (" World from loop4() at ");
    Serial.println (xPortGetCoreID());
    delay (500); // wait for half a second
  }
}