RGB Color Picker z Arduinom Nano in tremi potenciometri

// Projekt: Arduino Nano RGB Color Picker s TFT zaslonom
// Avtor: Borut Bukovnik - vadnica.org

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

#define TFT_CS 10
#define TFT_DC 8
#define TFT_RST 9

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

const int pinR = A0;
const int pinG = A1; 
const int pinB = A2;

void setup() {
  tft.begin();
  tft.setRotation(2); 
  tft.fillScreen(ILI9341_BLACK);
  tft.invertDisplay(true);
  
  tft.setCursor(50, 10);
  tft.setTextColor(ILI9341_WHITE, ILI9341_BLACK);
  tft.setTextSize(2);
  tft.print("COLOR PICKER");
}

void loop() {
  int vR = analogRead(pinR);
  int vG = analogRead(pinG);
  int vB = analogRead(pinB);

  uint8_t r = map(vR, 0, 1023, 0, 255);
  uint8_t g = map(vG, 0, 1023, 0, 255);
  uint8_t b = map(vB, 0, 1023, 0, 255);
  
  uint16_t barva = tft.color565(r, g, b);

  tft.fillRect(60, 40, 120, 120, barva);

  char buffer[40];
  sprintf(buffer, "R:%3d G:%3d B:%3d", r, g, b);
  
  tft.setCursor(20, 180);
  tft.setTextColor(ILI9341_WHITE, ILI9341_BLACK); 
  tft.setTextSize(2);
  tft.print(buffer);

  sprintf(buffer, "HEX: 0x%04X ", barva);
  tft.setCursor(65, 210);
  tft.setTextColor(ILI9341_YELLOW, ILI9341_BLACK);
  tft.print(buffer);

  delay(50);
}