/* Work in progress.. incomplete.. */
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_ST7789.h>

#define TFT_CS     10
#define TFT_RST    9
#define TFT_DC     8
#define TFT_WIDTH  320
#define TFT_HEIGHT 240




/*
  Simple "Hello World" for ILI9341 LCD

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

#include <Adafruit_GFX.h> // graphics library
#include <Adafruit_ST7789.h> // library for this display
#include <SPI.h>

// 2.8" TFT display ST7789 (NOT 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 | brown | GPIO13  -- Reset pin seems important…
// 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..  data pin   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  13 // reset pin
// #define TFT_MISO -- not used...
*/

// to ensure pinout for first tests, lets enumerate the important pins from pinout.
// Adafruit_ST7789 tft = Adafruit_ST7789(TFT_CS, TFT_DC, TFT_RST);
// Adafruit_ST7789 tft = Adafruit_ST7789(TFT_CS, TFT_DC, TFT_MOSI, TFT_CLK);
Adafruit_ST7789 tft = Adafruit_ST7789(TFT_CS, TFT_DC, TFT_MOSI, TFT_CLK, TFT_RST);

void setup() {
  //tft.init(240, 320, SPI_MODE2);
  tft.init(240, 320, SPI_MODE3);
  tft.invertDisplay(false);
  tft.setRotation(1); // rotates the screen  
  // (0) == 0 Degree == portrait mode with connector at bottom
  // (1) == 90 Degree == wide mode, connector at right side..
  // (2) == 180 Degree == portrait on my display / connector on top

  tft.fillScreen(ST77XX_BLACK); // fills the screen with black colour
  tft.setCursor(10, 10); // starts to write text at y10 x10
  tft.setTextColor(ST77XX_WHITE); // text colour to white you can use hex codes like 0xDAB420 too
  tft.setTextSize(3); // sets font size
  tft.setTextWrap(true);
  tft.print("HELLO WORLD!");

  tft.setCursor(20, 60);
  tft.setTextColor(ST77XX_RED);
  tft.setTextSize(2);
  tft.println("2.8' TFT, 320x240");

  tft.setCursor(20, 100);
  tft.setTextColor(ST77XX_GREEN);
  tft.setTextSize(2);
  tft.println("Color, ST7789");

  tft.setCursor(20, 130);
  tft.setTextColor(ST77XX_BLUE);
  tft.setTextSize(2);
  tft.println("SPI, 3.3V");

}
void loop() {
  
  }