Example Code for Arduino-Rotate

Hardware Preparation

• DFRduino UNO R3 (or similar) x 1
• 3.5”480x320 TFT LCD with Capacitive Touchscreen x1
• Wires

Software Preparation

• Arduino IDE
• DFRobot_GDL Library Files
• About how to install the library?
• DFRobot_GDL API Functions, click to find more details

Wiring Diagram

Other Preparation Work

1. All the demos of this product are all stored in the DFRobot_GDL->example->basic file
2. Before burning the demo, please open the corresponding materialized function (DFRobot_ST7789_240x320_HW_SPI）

Sample Code

/*!
 * @file rotate.ino
 * @brief Two fingers rotate left or right to change the display direction
 * @n The demo supports Mega2560, FireBeetle-ESP32, FireBeetle-ESP8266, FireBeetle-M0
 * @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"
#include "GrayscaleBitmap1.h"
/*M0*/
#if defined ARDUINO_SAM_ZERO
#define TFT_DC  7
#define TFT_CS  5
#define TFT_RST 6
/*ESP32 and ESP8266*/
#elif defined(ESP32) || defined(ESP8266)
#define TFT_DC  D2
#define TFT_CS  D6
#define TFT_RST D3
/* AVR series motherboard */
#else
#define TFT_DC  2
#define TFT_CS  3
#define TFT_RST 4
#endif

/**
   @brief Constructor   When the touch uses the gt series chip, you can call this constructor
*/
DFRobot_Touch_GT911 touch;

/**
   @brief Constructor When the screen uses hardware SPI communication, the driver IC is ILI9488, and the screen resolution is 320x480, 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_ILI9488_320x480_HW_SPI screen(/*dc=*/TFT_DC,/*cs=*/TFT_CS,/*rst=*/TFT_RST);
/* M0 mainboard DMA transfer */
//DFRobot_ILI9488_320x480_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);
int8_t rotate =0;
void setup()
{

  Serial.begin(9600);
  //UI initialization
  ui.begin();
  //Draw picture
  screen.drawRGBBitmap(/*x=*/(screen.width()-100)/2,/*y=*/(screen.height()-100)/2,/*bitmap gImage_Bitmap=*/(const unsigned uint16_t*)gImage_GrayscaleBitmap,/*w=*/100,/*h=*/100);
}


void loop()
{

    //getGestures()：Recognize gestures
    DFRobot_UI:: eGesture_t gesture = ui.getGestures();

   switch (gesture) {
    //Clockwise rotation
    case ui.DWROTATE : { 
      rotate++;
      if(rotate>3) rotate=0;
      //Set screen display orientation
       screen.setRotation(rotate);
       screen.drawRGBBitmap(/*x=*/(screen.width()-100)/2,/*y=*/(screen.height()-100)/2,/*bitmap gImage_Bitmap=*/(const unsigned uint16_t*)gImage_GrayscaleBitmap,/*w=*/100,/*h=*/100);

      } break; 
    //Anticlockwise rotation
    case ui.DCWROTATE : {
      if(rotate<0) {rotate=3;}
      else{
        rotate--;
      }
       screen.setRotation(rotate);
       screen.drawRGBBitmap(/*x=*/(screen.width()-100)/2,/*y=*/(screen.height()-100)/2,/*bitmap gImage_Bitmap=*/(const unsigned uint16_t*)gImage_GrayscaleBitmap,/*w=*/100,/*h=*/100);


      } break;
    case ui.NONE: {
        return;
      }
  }


}