Interfacing KS0108 based 128×64 Graphical LCD with Arduino

 

Aim:

This tutorial describes how to interface between a 128×64 graphic LCD and an 8-bit
micro-controller. The techniques described here are useful for any other controller type and interfacing technique. The micro-controller is connected via its I/O lines and all signals to the LCD are controlled directly by software.

Description:

Display mapping: Individual pixels can be controlled by writing a byte to a specific address. Each address is mapped to a corresponding set of 8 pixels on the display. Please refer to Figure 1. Note that the order of the columns is reversed. The first byte of data entered after setting the address registers to 0 will appear in the upper right of the display.

The display has 20 pins, numbered from right to left, as we can see in the picture below. It can be used to communicate with the any microcontroller using parallel communication. In this article, where the LCD refresh rate is not a critical point, we will use the parallel communication

The circuit uses a potentiometer (used a 50K) for adjusting the display contrast, and power is made ​​by 5v power supply.

The specification of this LCD are as follows.

• 128 horizontal pixel and 64 vertical pixel resolution.
• Controlled based on KS0108B
• Parallel 8bit interface
• On board graphic memory.
• Available in Green backlight with dark green pixels.
• Also available in Blue backlight with light blue pixels.
• LED backlight.
• 20 PIN linear connection.

---

PIN Description

PIN	Name	Function	Connection with AVR PIN
1	Vss	Ground
2	Vcc	+5v Supply in
3	V0	Contrast Adjust
4	RS	Instruction/Data Register Select	A3
5	R/W	READ/WRITE SELECTION	A2
6	E	ENABLE SIGNAL	A4
7	DB0	DATA IN/OUT	8
8	DB1	DATA IN/OUT	9
9	DB2	DATA IN/OUT	10
10	DB3	DATA IN/OUT	11
11	DB4	DATA IN/OUT	4
12	DB5	DATA IN/OUT	5
13	DB6	DATA IN/OUT	6
14	DB7	DATA IN/OUT	7
15	CS1	Chip Select 1	A1
16	CS2	Chip Select 2	A0
17	RST	RESET SIGNAL	RESET
18	VEE	NEGATIVE 10V OUT
19	LED+	LED BACKLIGHT
20	LED-	LED BACKLIGHT

Block Diagram

Schematic

Code

// *******************************************************
// Project: Interfacing Graphical LCD with Arduino
// Author: Hack Projects India
// Module description: Operate Graphical LCD
// *******************************************************

// include the library header
#include <glcd.h>
#include "config/ks0108_Mega.h" // Para Arduino Mega

// include the Fonts
#include <fonts/allFonts.h>

void setup() 
{
  // Initialize the GLCD 
  GLCD.Init();

  // Select the font for the default text area
  GLCD.SelectFont(System5x7);

 GLCD.ClearScreen();
 GLCD.CursorTo(0, 0);
  // GLCD.print("LCD Grafico!");
  //GLCD.print("123456789012345678901");
  GLCD.print("Hack Projects India");
  //delay(3000);
}


void loop() 
{
}

Downloads:

The code was compiled in Keil uvision4 and simulation was made in Proteus v7.7.
To download code and proteus simulation click here.

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