Our header file lcd.h makes interfacing 16×2 character LCD with using Keil C simpler and user friendly. Just include the header file and enjoy. LCD Interfacing with 89C51 – microcontroller – Circuit & C program. Learn how to interface 16 x 2 LCD and microcontroller using C code and circuit. This is a circuit diagram of Interfacing 16X2 LCD with AT89C51 which is a microcontroller family. We use LCD displays for displaying the error messages, etc.

Author: JoJokus Shakalkis
Country: Bolivia
Language: English (Spanish)
Genre: Software
Published (Last): 15 July 2010
Pages: 256
PDF File Size: 6.27 Mb
ePub File Size: 8.55 Mb
ISBN: 493-1-60640-523-9
Downloads: 82290
Price: Free* [*Free Regsitration Required]
Uploader: Samuramar

El retardo es demasiado corto.

How to interface 16×2 LCD with 8051 microcontroller (AT89C51)

Sorry for the question. This microcontroller has 40 pin s with four 8-bit ports P 0P 1P 2and P 3. The reset circuit, oscillator circuit and power supply need to be provided for the proper working of the circuit. This Code is only visible to Registered users.

Previous post Next post. There is nothing appearing on lcd. Here we only need to write to the LCD module. Use 2 lines and 5×7 matrix. However 4 itnerface mode uses only 4 data lines along with the control pins.


Capacitor C3, resistor R3 and push button switch S1 forms the reset circuitry. Thankyou for taking the efforts!

Sending data to the LCD. Also instruction command codes are sent to these pins. A command is an instruction given to LCD to do a predefined task like initializing, clearing the af89c51, setting the cursor position, controlling display etc. VEE pin is meant for adjusting the contrast of the LCD display and the contrast can be adjusted by varying the voltage at this pin.

Place data byte on the interfae register. The steps that has to be done for initializing the LCD display is given below and these steps are common for almost all applications. Could you explain me how DELY subroutine produces the delay? Each write operation is performed on the positive edge of the Enable signal. Program for interfacing LCD to microcontroller is shown below.

We will discuss in detail about the commands later. Pin 3 is connected to a preset of 10k? The necessary commands for the LCD initialization are defined at the end part of the program. Data register is for placing the data to be displayedand the command register is to place the commands. What is Web Browser. See the circuit diagram for better understanding. The steps for sending data to the LCD module is given below.


how to interface 16×2 LCD with microcontroller (AT89C51) – CONSBEDDED

An LCD module can be interfaced with a microcontroller either in 8 bit mode as seen above or in 4 bit mode. Each command will make the module to do a particular task. High level at this pin enables read mode and low level at this pin enables write mode. Force cursor to the beginning of the 2 nd line. DB0 to DB7 are the data pins.

LCD interfacing with Microcontroller (AT89C51) – Circuit & C Program

In this LCD each character is displayed in 5×7 pixel matrix. Pulse E from high to low.

Pls provide alp programs for LCD interfacing. Power supply to control contrast. Therefore before passing any data to LCD, its command register should be read and busy flag should be checked.

The JHDA has two built in registers namely data register and command register.