Touchscreen Display

Introduction: The touchscreen display is an essential component in many electronic devices, providing a user-friendly interface for interaction. In this article, we will explore the importance and usefulness of touchscreen displays and provide examples of code and a list of components used in those examples.

Project: For this example, we will create a simple calculator application using a touchscreen display. The objective is to allow users to perform basic arithmetic operations through the touchscreen interface.

Components List:

1. Arduino Uno - 1x Link: [Insert link to purchase]

2. 2.8" TFT Touchscreen Display - 1x Link: [Insert link to purchase]

3. Breadboard - 1x Link: [Insert link to purchase]

4. Jumper wires - As required Link: [Insert link to purchase]

Examples: Example 1: Display Initialization

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

#define TFT_CLK  13
#define TFT_MISO 12
#define TFT_MOSI 11
#define TFT_CS   10
#define TFT_RST   9
#define TFT_DC    8

#define TS_CLK   6
#define TS_CS    5
#define TS_DIN   4
#define TS_DOUT  3
#define TS_IRQ   2

Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_RST, TFT_CLK, TFT_RST, TFT_MISO, TFT_MOSI);
TouchScreen ts = TouchScreen(TS_XP, TS_YP, TS_XM, TS_YM, 300);

void setup() {
  tft.begin();
  tft.setRotation(3);
}

void loop() {
  // Code for the main program
}

Example 2: Touchscreen Input Handling

void loop() {
  TSPoint p = ts.getPoint();

  if (p.z > MINPRESSURE && p.z < MAXPRESSURE) {
    // Touch detected
    int x = map(p.x, TS_MINX, TS_MAXX, 0, tft.width());
    int y = map(p.y, TS_MINY, TS_MAXY, 0, tft.height());

    // Code to handle touch input
  }
}

Example 3: Simple Calculator Interface

void loop() {
  // Code for displaying calculator interface

  // Code for handling touch input and performing calculations
}

Conclusion: The touchscreen display is a crucial component in modern electronic devices, enabling intuitive user interaction. By understanding the basics of touchscreen displays and utilizing the Arduino platform, we can create innovative projects with user-friendly interfaces. The examples provided in this article serve as a starting point for further exploration and development in this exciting field.