Example Code for Arduino-gesture recognition UI

Hardware Preparation

• Arduino UNO control board x1
• 2.8" 240x320 LCD display module x1
• Wires

Note: Due to the limited memory capacity of Arduino UNO, it is unable to run programs related to UI. Therefore, we recommend using ESP32, which has more memory, for such operations.

Software Preparation

• Arduino IDE, click to download
• About how to install the library
• DFRobot_GDL API interface function , click to learn more

1. The GDI interface should be used in conjunction with the main control board with GDI interface
2. It is recommended to use Arduino 1.8.10 and above
3. If the SD card slot is in poor contact, it may fail to initialize. Try agian after unplugging and plugging

Wiring Diagram

Due to the limited memory capacity of Arduino UNO, it is unable to run programs related to UI. Therefore, we recommend using ESP32, which has more memory, for such operations.

Sample Code

/*!
 * @file UI_gesture.ino
 * @brief Recognize user's gesture in the specified area of the screen, and display the name of the gesture in the text box.
 * @n The demo supports Arduino Uno, Leonardo, Mega2560, FireBeetle-ESP32, FireBeetle-ESP8266, FireBeetle-M0
 * @n Click the text box to move the cursor into it when we need a text box to display.
 * @copyright Copyright (c) 2010 DFRobot Co. Ltd (http://www.dfrobot.com)
 * @licence The MIT License (MIT)
 * @author [fengli] ([email protected])
 * @version V1.0
 * @date 2019-12-6
 * @get from https://www.dfrobot.com
 * @url https://github.com/DFRobot/DFRobot_GDL/src/DFRpbot_UI
*/
#include "DFRobot_UI.h"
#include "Arduino.h"
#include "DFRobot_GDL.h"
#include "DFRobot_Touch.h"

/*M0*/
#if defined ARDUINO_SAM_ZERO
#define TFT_DC  7
#define TFT_CS  5
#define TFT_RST 6
#define TOUCH_CS A3
/*ESP32 and ESP8266*/
#elif defined(ESP32) || defined(ESP8266)
#define TFT_DC  D2
#define TFT_CS  D6
#define TFT_RST D3
#define TOUCH_CS D12
/* AVR series mainboard */
#else
#define TFT_DC  2
#define TFT_CS  3
#define TFT_RST 4
#define TOUCH_CS 5
#endif
/**
 * @brief Constructor When the touch uses XPT2046 chip, you can call this constructor
 * @param cs SPI chip select signal
 * @param rst Reset signal
 * @param irq Interrupt signal
 */
DFRobot_Touch_XPT2046 touch(/*cs=*/TOUCH_CS);

/**
 * @brief Constructor When the screen uses hardware SPI communication, the driver IC is ILI9341, and the screen resolution is 240x320, this constructor can be called
 * @param dc Command/data line pin for SPI communication
 * @param cs Chip select pin for SPI communication
 * @param rst Reset pin of the screen
 */
DFRobot_ILI9341_240x320_HW_SPI screen(/*dc=*/TFT_DC,/*cs=*/TFT_CS,/*rst=*/TFT_RST);
/* M0 mainboard DMA transfer */
//DFRobot_ILI9341_240x320_DMA_SPI  screen(/*dc=*/TFT_DC,/*cs=*/TFT_CS,/*rst=*/TFT_RST);

/**
 * @brief Constructor
 * @param gdl Screen object
 * @param touch Touch object
 */
DFRobot_UI ui(&screen, &touch);



void setup()
{

  Serial.begin(9600);
  ui.begin();
  // Set the UI theme, there are two themes to choose from: CLASSIC and MODERN.
  ui.setTheme(DFRobot_UI::MODERN);

  //Create a text box control
  DFRobot_UI::sTextBox_t &tb = ui.creatText();
  //Create a text box control on the screen and draw the text box according to the customized or initialized parameters
  ui.draw(&tb);
  /**
   * @brief  Set the touch gesture recognition area
   */
  ui.setGestureArea(/*x=*/screen.width()/2-75,/*y=*/100,/*width=*/150,/*height=*/150);
  while(true){
     //Refresh
    ui.refresh();
    // getGestures()： Get gesture
    switch(ui.getGestures()){
      //setText：let the text box display a string
      case ui.SUPGLIDE : tb.setText("upwards slide"); break;
      case ui.SDOWNGLIDE : tb.setText("down slide"); break;
      case ui.SLEFTGLIDE : tb.setText("left slide"); break;
      case ui.SRIGHTGLIDE : tb.setText("right slide"); break;
      case ui.DLONGPRESSED : tb.setText("long press"); break;
      case ui.SCLICK : tb.setText("click"); break;
      case ui.DDOUBLECLICK : tb.setText("double click"); break;
      default  :  break;
      }
  }
}


void loop()
{


}