esp32-035_touchscreen.ino

#include <Arduino_GFX_Library.h>  // By Moon On Our Nation
/* Use V1.3.1 
 * (https://github.com/moononournation/Arduino_GFX) Can be installed via the library manager of the Arduino IDE
*/
#include <XPT2046_Touchscreen.h>  // By Paul Stoffregen
/* Use V1.4.0
 * (https://github.com/PaulStoffregen/XPT2046_Touchscreen) Can be installed via the library manager of the Arduino IDE
*/
#include <SPI.h>

// Setup TFT screen
Arduino_DataBus *bus = new Arduino_ESP32SPI(2 /* DC */, 15 /* CS */, 14 /* SCK */, 13 /* MOSI */, 12 /* MISO */);
Arduino_GFX *gfx = new Arduino_ST7796(bus, -1 /* RST */, 3 /* rotation */, false /* IPS */);

#define GFX_BL DF_GFX_BL  // default backlight pin, you may replace DF_GFX_BL to actual backlight pin
#define TFT_BL 27

// Setup touch
#define TOUCH_XPT2046
#define TOUCH_XPT2046_SCK 14
#define TOUCH_XPT2046_MISO 12
#define TOUCH_XPT2046_MOSI 13
#define TOUCH_XPT2046_CS 33
#define TOUCH_XPT2046_INT 36
#define TOUCH_XPT2046_ROTATION 3
#define TOUCH_MAP_X1 4000
#define TOUCH_MAP_X2 100
#define TOUCH_MAP_Y1 100
#define TOUCH_MAP_Y2 4000

XPT2046_Touchscreen ts(TOUCH_XPT2046_CS, TOUCH_XPT2046_INT);

void setup(void) {
  Serial.begin(115200);
  gfx->begin();
  gfx->fillScreen(BLACK);

#ifdef TFT_BL
  pinMode(TFT_BL, OUTPUT);
  digitalWrite(TFT_BL, HIGH);
#endif

  gfx->setCursor(10, 10);
  gfx->setTextColor(RED);
  gfx->println("Hello World!");

  delay(2000);  // 2 seconds

  SPI.begin(TOUCH_XPT2046_SCK, TOUCH_XPT2046_MISO, TOUCH_XPT2046_MOSI, TOUCH_XPT2046_CS);
  ts.begin();
  ts.setRotation(TOUCH_XPT2046_ROTATION);

  gfx->fillScreen(BLACK);
  gfx->setCursor(0, 0);
  gfx->print("ESP32-3248S035R touch test:");
  gfx->setTextColor(GREEN);
  Serial.println(digitalRead(-1));
}

void loop() {
  if (ts.tirqTouched()) {
    if (ts.touched()) {
      // Get touched point
      TS_Point p = ts.getPoint();
      // Print touch in Serial Monitor
      Serial.print("Touch: ");
      Serial.print("  X: ");
      Serial.print(p.x);
      Serial.print("  Y: ");
      Serial.print(p.y);
      Serial.print("  Pressure: ");
      Serial.println(p.z);

      // Print touch on screen
      gfx->setCursor(0, 20);
      gfx->println("X: " + String(p.x) + "   Y: " + String(p.y) + "   Pressure: " + String(p.z));

      delay(100);
      gfx->fillRect(0, 20, 220, 40, BLACK);
      gfx->fillRect(0, 300, 170, 20, BLACK);
      gfx->setCursor(0, 310);
    }
  }
  delay(50);
}