how to interface lcd with arduino leonardo?i follow the data and program given in the arduino software many times but no output come..please help anyone to me...

Views: 194

Replies to This Discussion

First the basics, check what kind of LCD display they expect in the SW and make sure yours is compatible.  If it is compatible, then verify it has power.

Does your screen do anything at all?  Flash?  Light up?  Lines?  Blocks?  The Arduino LiquidCrystal library is for LCDs based on the Hitachi HD44780 chipset, but they have libraries for many other common chipsets on the LCD Playground page.  If your LCD lights up or displays garbage you probably have a different chipset.  More information about your device and what it's doing would be helpful to get more help!

ya in my LCD BACKGROUND LIGHTS ON  and simply black colour blocks come.i use 16*2 JHD 162A  .this LCD is compatible with HD44780 ? 

Hi, I think this thread might help you.  I didn't read it, but it sounds like a similar problem.

http://arduino.cc/forum/index.php/topic,26527.0.html

If you get lights and blocks then the LCD is working and not getting any data.  It looks like the JHD uses the HD44780 chipset, so it should work with the LiquidCrystal library.  I'd check your wiring, or redo it from scratch.  Make sure all of your grounds are grounded, and make sure your contrast pot is hooked up correctly (5V on one pin, ground on the other, and the middle pin goes to the LCD).  Make sure that the R/W pin is grounded.  Make sure that in your code you initialize the LiquidCrystal library with the correct pins (if you look at the LiquidCrystal constructor, you'll use the first option with rs, enable, and d4, d5, d6, and d7); tell the library which pin on the Arduino is connected to each of the LCD pins.  After that, be sure you call LCD.begin(16, 2).  Also, for my LCD sometimes I have to reset the Arduino once or twice to get it to work.

RSS

Latest Activity

Profile IconAllan Paculan and Nilesh Parmar joined GarageLab (arduino, electronics, robotics, hacking)
6 hours ago
keith vasilakes replied to Andy S's discussion Arduino MEGA boolean?
"sounds like an uninitialized variable when used in your task, what ever that is"
19 hours ago
GarageLab posted blog posts
yesterday
Fajer commented on GarageLab's blog post Tutorial: Make your line following robot
"Hi there can u stop the motors if there are no more lines??"
Tuesday
Profile IconDivergent Programmer, avengineer01, Fajer and 3 more joined GarageLab (arduino, electronics, robotics, hacking)
Tuesday
GarageLab posted blog posts
Tuesday
David Hay posted a status
"Just finished the first phaseof a homebrewing project. Holds temps & is consistent. Check it out: www.callaid-taigh-gruide.com"
Monday
GarageLab posted blog posts
Oct 24
GarageLab posted a blog post

Scientists Create a Real Hoverboard

Ever since the fictional hoverboards in 1989’s Back to the Future Part II children (and adults)…See More
Oct 22
Colin Goldberg posted a discussion

Can I use my Samsung Tab 4 tablet as a usb host to a beaglebone board black?

Hi,As a newbie to this space, I would like to know what to think about before I try to connect my…See More
Oct 21
Antonio Turner posted a status
Oct 21
GarageLab posted blog posts
Oct 21
Profile IconGeorge Ray Learmond, Steve Barnes and Diego Leite Mendes joined GarageLab (arduino, electronics, robotics, hacking)
Oct 20
GarageLab posted a blog post
Oct 17
Stu porley is now a member of GarageLab (arduino, electronics, robotics, hacking)
Oct 16
GarageLab posted blog posts
Oct 16
Atari Punk Console posted a status
"I backed Garag Lab Kick Starter Project the Garagino, I can't wait till I get my Garagino! https://www.kickstarter.com/projects/931487098/g"
Oct 15
Profile IconDan bgarage and Joe Cannella joined GarageLab (arduino, electronics, robotics, hacking)
Oct 15
GarageLab posted blog posts
Oct 14
Profile IconSim Wilkins G. Entendez, Charles Hamilton and Colin Goldberg joined GarageLab (arduino, electronics, robotics, hacking)
Oct 13

© 2014   Created by Marcelo Rodrigues.

Badges  |  Report an Issue  |  Terms of Service