Example Code for Arduino-GDI Display interface

Hardware Preparation

• FireBeetle 2 ESP32-E (SKU: DFR0654) ×1
• Gravity: I2C OLED-128x64 Display（SKU: DFR0669）×1
• USB Data Cable ×1

Wiring Diagram

Other Preparation Work

This interface is a DFRbot dedicated GDI display interface for connecting a screen using a 18pin-FPC wire.

The pin list for using GDI camera interface is shown below:

When using FPC to connect the screen, please configure the corresponding pin numbers according to the GDL demo. Normally, only three pins need to be configured on different main controllers. The screen configuration is shown below:

/*ESP32 and ESP8266*/
#elif defined(ESP32) || defined(ESP8266)
#define TFT_DC  D2
#define TFT_CS  D6
#define TFT_RST D3
#define TFT_BL  D13

Please refer to the GDL display screen wiki for specific usage instructions.

Sample Code:

Function program: Show "DFRobot" and "20220828" on the display.

#include "DFRobot_GDL.h"
#define TFT_DC  D2
#define TFT_CS  D6
#define TFT_RST D3
#define TFT_BL  D13

DFRobot_ST7789_240x320_HW_SPI screen(/*dc=*/TFT_DC,/*cs=*/TFT_CS,/*rst=*/TFT_RST);

void setup() {
  Serial.begin(115200);    //Init
  screen.begin();
  screen.setTextSize(2);   //Text size 4, range 1 to 4
  screen.fillScreen(COLOR_RGB565_BLACK);    //Screen background color 
  screen.setFont(&FreeMono12pt7b);       // Font
  screen.setCursor(/*x=*/10,/*y=*/120);    // Starting point of the text
  screen.setTextColor(COLOR_RGB565_LGRAY);   //Text color 
  screen.print("DFRobot");    //Output text content 
  screen.setCursor(10,200);
  screen.setTextColor(COLOR_RGB565_GREEN);
  screen.setTextWrap(true);
  screen.print("20220828");
}

void loop() {
}

Result

The display shows “DFRobot" and "20220828" when all ready.