/*

  ESP32-ILI9341_01.ino

  ESP32 HTTPClient Jokes API Example

  https://wokwi.com/projects/342032431249883731

  Copyright (C) 2022, Uri Shaked
*/

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


/*
SPI DEFAULT: 
MOSI: 23
MISO: 19
SCK: 18
SS: 5
*/
// ************************************************************************
// Setup42_ILI9341_ESP32.h -->  Hardware-specific setup file
// See SetupX_Template.h for all options available
#define USER_SETUP_ID 42

#define ILI9341_DRIVER

#define TFT_MISO 19  // (leave TFT SDO disconnected if other SPI devices share MISO)
#define TFT_MOSI 23
#define TFT_SCLK 18
#define TFT_CS   15  // Chip select control pin
#define TFT_DC    2  // Data Command control pin
#define TFT_RST   4  // Reset pin (could connect to RST pin)

// Optional touch screen chip select
//#define TOUCH_CS 5 // Chip select pin (T_CS) of touch screen

#define LOAD_GLCD    // Font 1. Original Adafruit 8 pixel font needs ~1820 bytes in FLASH
#define LOAD_FONT2   // Font 2. Small 16 pixel high font, needs ~3534 bytes in FLASH, 96 characters
#define LOAD_FONT4   // Font 4. Medium 26 pixel high font, needs ~5848 bytes in FLASH, 96 characters
#define LOAD_FONT6   // Font 6. Large 48 pixel font, needs ~2666 bytes in FLASH, only characters 1234567890:-.apm
#define LOAD_FONT7   // Font 7. 7 segment 48 pixel font, needs ~2438 bytes in FLASH, only characters 1234567890:.
#define LOAD_FONT8   // Font 8. Large 75 pixel font needs ~3256 bytes in FLASH, only characters 1234567890:-.
#define LOAD_GFXFF   // FreeFonts. Include access to the 48 Adafruit_GFX free fonts FF1 to FF48 and custom fonts

#define SMOOTH_FONT

// TFT SPI clock frequency
// #define SPI_FREQUENCY  20000000
// #define SPI_FREQUENCY  27000000
#define SPI_FREQUENCY  40000000
// #define SPI_FREQUENCY  80000000

// Optional reduced SPI frequency for reading TFT
#define SPI_READ_FREQUENCY  16000000

// SPI clock frequency for touch controller
#define SPI_TOUCH_FREQUENCY  2500000
//
// Setup42_ILI9341_ESP32.h -->  Hardware-specific setup file
// ************************************************************************


#define BTN_PIN 5


// Use hardware SPI (on Uno, #13, #12, #11) and the above for CS/DC
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_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);

unsigned long testRects(uint16_t color) {
  unsigned long start;
  int           n, i, i2,
                cx = tft.width()  / 2,
                cy = tft.height() / 2;

  tft.fillScreen(ILI9341_BLACK);
  n     = min(tft.width(), tft.height());
  start = micros();
  for(i=2; i<n; i+=6) {
    i2 = i / 2;
    tft.drawRect(cx-i2, cy-i2, i, i, color);
  }

  return micros() - start;
}

unsigned long testFilledRects(uint16_t color1, uint16_t color2) {
  unsigned long start, t = 0;
  int           n, i, i2,
                cx = tft.width()  / 2 - 1,
                cy = tft.height() / 2 - 1;

  tft.fillScreen(ILI9341_BLACK);
  n = min(tft.width(), tft.height());
  for(i=n; i>0; i-=6) {
    i2    = i / 2;
    start = micros();
    tft.fillRect(cx-i2, cy-i2, i, i, color1);
    t    += micros() - start;
    // Outlines are not included in timing results
    tft.drawRect(cx-i2, cy-i2, i, i, color2);
    yield();
  }

  return t;
}

void setup() {

  Serial.begin(115200);

  pinMode(BTN_PIN, INPUT_PULLUP);

  Serial.print("MOSI on GPIO"); Serial.println(MOSI);
  Serial.print("MISO on GPIO"); Serial.println(MISO);
  Serial.print("SCK  on GPIO"); Serial.println(SCK);
  Serial.print("SS   on GPIO"); Serial.println(SS);

  tft.begin();

  
  tft.fillScreen(ILI9341_RED);
  delay(500);
  tft.fillScreen(ILI9341_GREEN);
  delay(500);
  tft.fillScreen(ILI9341_BLUE);
  delay(500);
/*  
  tft.fillScreen(ILI9341_BLACK);
  delay(500);

  Serial.print(F("Rectangles (outline)     "));
  Serial.println(testRects(ILI9341_GREEN));
  delay(500);
  Serial.print(F("Rectangles (filled)      "));
  Serial.println(testFilledRects(ILI9341_YELLOW, ILI9341_MAGENTA));
  delay(500);

  tft.fillScreen(ILI9341_BLACK);
  delay(500);

  tft.setCursor(26, 120);
  tft.setTextColor(ILI9341_RED);
  tft.setTextSize(3);
  tft.println("Hello, TFT!");
*/
  //tft.setCursor(20, 160);
  // STANDARD HOR.text (landscape)
  tft.setRotation(1); // (HOR.text: L to R, Origin=TOP-L-)
  tft.setCursor(5, 120);
  //
  tft.setTextColor(ILI9341_GREEN);
  tft.setTextSize(2);
  tft.println("Can you press the button?");

  delay(2000);

}

void loop() {

  static bool flip = false;
  
  if (digitalRead(BTN_PIN) == LOW) {
    flip = (! flip);
    if (flip) {
      tft.fillScreen(ILI9341_BLUE);
      tft.setCursor(20, 160);
      tft.setTextColor(ILI9341_YELLOW);
      tft.setTextSize(2);
      // STANDARD HOR.text (landscape)
      tft.setRotation(1); // (HOR.text: L to R, Origin=TOP-L-)
      tft.setCursor(5, 120);
      tft.println("I write with colors.");
    } else {
      tft.fillScreen(ILI9341_BLACK);
    } // if-else
    //
    tft.setCursor(0, 0);
    flip = (! flip);
    delay(1000);
    tft.fillScreen(ILI9341_BLACK);
  } // if
  //
  delay(100);
  //
}