Importance and Utility of TouchScreen Library

The TouchScreen Library is a crucial tool for engineers and hobbyists working with Arduino and touchscreens. It provides a simplified and efficient way to interface with touchscreens, allowing for the development of interactive projects and user-friendly interfaces. By using the TouchScreen Library, developers can easily detect touch events, retrieve touch coordinates, and implement various touch-based functionalities.

Projeto: Creating a Touch-Based Calculator

In this example project, we will create a touch-based calculator using the Arduino and a touchscreen display. The objective is to build a calculator interface that allows users to perform basic arithmetic operations by touching the corresponding buttons on the screen. The calculator will display the input and the result of the calculations in real-time.

List of Components:

• Arduino Uno (1x): Link to purchase
• Touchscreen Display (1x): Link to purchase
• Breadboard (1x): Link to purchase
• Jumper Wires (Male to Male) (10x): Link to purchase

Examples:

#include <TouchScreen.h>

// Define the pins for the touchscreen
#define TS_CLK 13
#define TS_CS 12
#define TS_DIN 11
#define TS_DOUT 10
#define TS_IRQ 9

// Define the touchscreen dimensions
#define TS_WIDTH 240
#define TS_HEIGHT 320

// Create a TouchScreen object
TouchScreen ts = TouchScreen(TS_CLK, TS_CS, TS_DIN, TS_DOUT, TS_IRQ);

// Define the buttons' coordinates
#define BUTTON_1_X 40
#define BUTTON_1_Y 100
#define BUTTON_2_X 120
#define BUTTON_2_Y 100
#define BUTTON_3_X 200
#define BUTTON_3_Y 100

void setup() {
  // Initialize the serial communication
  Serial.begin(9600);
}

void loop() {
  // Read the touchscreen input
  TSPoint touch = ts.getPoint();

  // Check if a touch event occurred
  if (touch.z > 0) {
    // Check if the touch is within the button 1 area
    if (touch.x > BUTTON_1_X - 10 && touch.x < BUTTON_1_X + 10 && touch.y > BUTTON_1_Y - 10 && touch.y < BUTTON_1_Y + 10) {
      Serial.println("Button 1 pressed");
      // Perform the corresponding action for button 1
    }
    // Check if the touch is within the button 2 area
    else if (touch.x > BUTTON_2_X - 10 && touch.x < BUTTON_2_X + 10 && touch.y > BUTTON_2_Y - 10 && touch.y < BUTTON_2_Y + 10) {
      Serial.println("Button 2 pressed");
      // Perform the corresponding action for button 2
    }
    // Check if the touch is within the button 3 area
    else if (touch.x > BUTTON_3_X - 10 && touch.x < BUTTON_3_X + 10 && touch.y > BUTTON_3_Y - 10 && touch.y < BUTTON_3_Y + 10) {
      Serial.println("Button 3 pressed");
      // Perform the corresponding action for button 3
    }
  }
}

In this example, we use the TouchScreen library to detect touch events on a touchscreen display. We define the pins for the touchscreen and create a TouchScreen object. Then, we define the coordinates for the buttons on the screen and check if the touch falls within those areas. If a touch event occurs within a button's area, the corresponding action is performed.