/*
  Simple "Hello World" for ILI9341 LCD

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

#include "SPI.h"
#include "Adafruit_GFX.h"
#include "Adafruit_ILI9341.h"

// 2.8" TFT display with ILI9341, 240x320
// Display | color | ESP32 pin (38 pins Dev)
// GND | black | GND
// VCC | red   | 3.3V
// SCK | blue  | GPIO18   -- CLK
// SDA | green | GPIO23 -- MOSI  
// RST |   -   | -
// D/C | gelb  | GPIO22 (data/command toggle, for displays, not SPI standard)
// CS | orange | GPIO5 SS (chip select)

#define TFT_DC 22 // GPIO 22, beliebig..  Display Data/command
#define TFT_CS 5   // Chip select
// TODO: backlight == LED mit PWM...
#define TFT_MOSI 23 
#define TFT_CLK  18
//#define TFT_RST
// #define TFT_MISO -- not used...

//Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);

// Use hardware SPI (on Uno, #13, #12, #11) and the above for CS/DC
// If using the breakout, change pins as desired
// Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_MOSI, TFT_CLK, TFT_RST, TFT_MISO);
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_MOSI, TFT_CLK);

/*
  void setRotation(uint8_t r);
  void invertDisplay(bool i);
  void scrollTo(uint16_t y);

*/

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?");

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

/* void loop() { } */

void loop() {
   for (int i = 0; i<30; i=i+5) {
      //tft.clearDisplay();
      tft.setCursor(26+i, 120+i);
      tft.setTextColor(ILI9341_RED);
      tft.setTextSize(3);
      tft.println("Hello, TFT!");
    
      tft.setCursor(20+i, 160+i);
      tft.setTextColor(ILI9341_GREEN);
      tft.setTextSize(2);
      tft.println("I can has colors?");
      delay(1000);
  }
}