LCD Module Documentation Standard

iLabs Srijan LCD Module

Snap / Product Picture (HD Quality)

Features

1. Easy to program using Srijan.

2. Works on a very high speed of 100 Kbps.

3. Operates on both 3.3V & 5V TTL Logic Levels.

4. Has an easy command interface.

5. Has a high refresh rate of 75Hz.

6. Has inbuilt commands for creating scrolling text.

7. Has inbuilt commands for creating custom menu.

Application

1. RFID Readers.

2. Finger Print Recognizers.

3. Attendance Recorder Systems.

4. Time Display Modules.

5. Displays for Embedded System Applications.

Introduction / Abstract

iLabs Srijan LCD Module is an intelligent 16X2 LCD display device. It can be easily interfaced

with the Srijan Mother Board to display all the English alpha numerals. It has and easy

COMMAND interface which can be used to control the functionality of the module. This LCD

Module works on standard iLabs Communication Protocol. It has various commands inbuilt

in its on-chip controller which helps the designer to design a perfect product with very less

complexities.

Key Specification

Content in black (Detail PCB Components Specification)

Functional Block Diagram

Principle of Operation

Note:- It is assumed that the developer is using ATmel Studio 6 for firmware

Development.

Connect the LCD Module as shown in the functional block diagram with the Srijan

Motherboard. To get started with the LCD Module you need to first copy paste the header file

SrijanMaster.h & libSrijanMaster.a in your source folder (The place where your .c file

resides). Then in your code add the directive #includeSrijanMaster.h. Then go to the

project tab and select project properties.

Then click on Toolchain > AVR GNU C Linker > Libraries

Then click on add item

You will see a textbox type there libSrijanMaster and click OK.

Also click on the AddItem button in the Library Search Path box and give the path of the

folder where libSrijanSlave.a file resides. Now you are ready to interface with the LCD

Module.

Slave address of the LCD Module is 44 (Hex). To interact with the LCD module you need to

send the following commands on the iLabs Communication Bus.

Command Description

LCD_CLEAR Will clear the LCD screen LCD_GOTO posx,posy Will go to the specified position in x and y

direction. (Here posx & posy are user defined location numbers)

LCD_NEWLINE Will move the cursor to the new line LCD_MARQUEE text Will set the marquee text which will be

marquee on the LCD when an enable command is sent. (Here text is a user defined

value which is to be marquee) LCD_MARQUEE_ON Will start moving the set marquee text. LCD_MARQUEE_OFF Will stop moving the marquee text.

To interface with the LCD Module you just need to call the function

write(0x44,COMMAND);. Here the command should be a character array or a character

pointer which is terminated with \0.

Application Information: Software

Sample Code:-

/* * Master_I2C.c * * Created: 12-07-2012 PM 04:57:00 * Company: iLabs * Author: Mahesh */ #define F_CPU 8000000 #include #include #include #include #include "SrijanMaster.h" //Header file for Srijan Based Applications int main(void) { init(); //To initialize the communication while(1) //Loop forever { write(0x44,"HI"); //Will display Hi on the LCD _delay_ms(5); write(0x44,"LCD_NEWLINE"); //To move to a new line in the LCD _delay_ms(5); write(0x44,"New line"); //To display New line on the LCD _delay_ms(3000); write(0x44,"LCD_CLEAR"); //To clear the LCD Screen _delay_ms(5); write(0x44,"LCD_GOTO 2,3");//To go to the specified position in the LCD _delay_ms(5); write(0x44,"Hello"); //To display Hello on the LCD screen _delay_ms(1000); Write(0x44,"LCD_CLEAR"); //To clear the LCD Screen

_delay_ms(1000);

} }

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