How to Interface an Arduino Board with a 128x64 GLCD Display to Display Photos

Interfacing an Arduino board with a 128x64 GLCD (Graphic Liquid Crystal Display) is a straightforward process that allows you to display photos and other images on the display. This guide will walk you through the steps to set up and program an Arduino Mega board and a 128x64 GLCD to display your photo.

Required Components

Arduino Mega Board 128x64 GLCD Display Connecting Wires 100K Variable Resistor OpenGLCD Library LCD Assistant Software

Step-by-Step Guide

Step 1: Make the Connections

Connect the GLCD display to the Arduino Mega board following the pinout diagram. The 100K variable resistor must be attached to the contrast control pin of the GLCD to adjust the brightness. The pinout details are as follows:

GLCD PinArduino Mega Pin 1A0 260 361 462 563 664 765 866 967 1068 1169 1270 1371 1472 1573 1674 1775 1876 1977 2078

Step 2: Download the OpenGLCD Library

Insert the OpenGLCD library into your Arduino IDE. Once installed, you can access example programs and functions specifically designed for the GLCD display.

Step 3: Prepare the Image

Select a photo that you want to display on the GLCD. Ensure that your image does not exceed 128x64 pixels. Resize and convert your image to a monochrome bitmap format using an appropriate image editing tool.

Step 4: Convert the Bitmap to HEX

Download and use the LCD Assistant Software to convert the bitmap image into hex codes.

Step 5: Save the Hex File

Load the bitmap image in the LCD Assistant software, convert it to a hex file, and save it with a .h extension, such as 12134.h.

Step 6: Copy the HEX Details

Open the saved hex file using a text editor like Notepad and extract the hex numbers only.

Step 7: Make Header File

Create a new notepad file and define the bitmap size and other required elements.

Step 8: Paste in Library

Save the header file as a .h file and copy it into the OpenGLCD bitmaps folder.

Step 9: Store the Bitmap Image

Copy the bitmap image into the OpenGLCD/bitmaps/images folder. This ensures that the GLCD can generate the image correctly.

Step 10: Use Arduino Code to Display the Photo

Use the following Arduino code to display the photo centered on the display:

includeGLCD.hincludeSPI.h#define DELAY 2000  // ms delay between examplesvoid setup(){    ();    GLCD.display();}void loop(){    ();    GLCD.DrawBitmap12134(0, 1, 12134);    delay(DELAY);}

Ensure that the correct path to the bitmap file is specified in the code.

By following these steps, you can successfully interface your Arduino board with a 128x64 GLCD display and display photos on it.