Comments on: Using LCD Module with AVRs

By: Murali

Murali — Tue, 31 Jan 2012 15:03:40 +0000

Thanks alot for providing this much of valuable information in easy to use LCD library.In this code i made two changes i.e.,1)connected R/W pin to GND,and commented LCDBusyLoop(); 2 times one at InitLCD and second at LCDByte(); insted of busy loop function i inserted a delay 10 ms, so here i saved one M.C.U pin.
2)I connected data pins(D4,D5,D6,D7) from LCD to higher nibble at MCUport(PD4,PD5,PD6,PD7)
with some changes at InitLCD();LCDByte();,it is working good.My question is it ok eliminate reading data from L.C.D or it’s needed,
Thanks&Regards
Murali,
Waiting for your reply….

By: Attila

Attila — Thu, 05 Jan 2012 18:48:59 +0000

Nice project, helped me a lot!
Does this library handle 16×4 or 20×4 LCD-s with HD44780 controller?

Thanks, Attila

By: Avinash

Avinash — Tue, 03 Jan 2012 03:27:20 +0000

Instead write

LCDData(96);

you can use any valid ASCII code as parameter.

By: Filip

Filip — Mon, 02 Jan 2012 17:12:13 +0000

Great, I’m looking forward this new edition.
If I want to display specific character from lcd ascii table should I write
LCDWriteString(223) ?

By: Avinash

Avinash — Mon, 02 Jan 2012 04:26:18 +0000

other wise you may try SoftI2C

http://extremeelectronics.co.in/avr-tutorials/ds1307-i2c-rtcc-interface-using-softi2c-lib/

By: Avinash

Avinash — Mon, 02 Jan 2012 04:23:46 +0000

@Filip,

Nice question. Although our internal version has support, yet the public version is short on that feature.

Soon we will release the custom char supported version.

By: Filip

Filip — Sun, 01 Jan 2012 21:09:34 +0000

This is very good and easy to use lcd library.
I have 2 questions: Is there possibility to make custom characters with this library?
How can I print character which exist in lcd rom but is not available throu keyboard? Like some lcd special characters. For example degree symbol ° is not available throu keyboard, or am I wrong?

Thanks,
regards
filip

By: Vita

Vita — Thu, 29 Dec 2011 20:29:44 +0000

Nice tutorial, thanks. My first running application with Atmega32 and LCD with large number of not working before. I have tried move all pins to port D, but display doesnot works correctly. I would like to get free C port for realtime chip on my kit (http://shop.onpa.cz/?kit-evb-4.3,27) and SDA and SCL pins. I will try move them on port B on my board tomorow. Thank again. Czech Republic

By: aurelien

aurelien — Sun, 25 Dec 2011 10:43:16 +0000

Hye Avinash and thanks for this tutorial !!! It’s help me a lot for my project.

I have one question… I want to use my LCD display in 8bit mode like this (with atmega16):
D7 => PORTC pin 7 to D0 => PORTC pin 0
R/E/RW => No change.

What I should modify ?? Is it easy to do?

Thanks
Aurélien
PS: Merry Christmas

By: Matthew

Matthew — Thu, 15 Dec 2011 14:03:32 +0000

Thank you

By: Avinash

Avinash — Thu, 15 Dec 2011 03:36:39 +0000

@Matthew,

Yes you can use them

By: Matthew

Matthew — Mon, 12 Dec 2011 16:33:22 +0000

Dear sir,
I think your tutorial and the library is very helpful. I should like to ask you if I may use your library for my robotic project in a students’ technical competition?

Yours faithfully

By: itaci

itaci — Sat, 10 Dec 2011 18:57:01 +0000

Plase… i’m request LCD libarary for ATmega16,32 ..
Thanks for u…
azizmetronet@yahoo.com

By: Avinash

Avinash — Tue, 29 Nov 2011 03:51:54 +0000

Thanks!

By: compushh

compushh — Tue, 25 Oct 2011 04:47:18 +0000

Thanks so much for this info. the library and the instructions you provided was really really helpful. it was also easy to understand, even for a beginner like me.

By: Ramesh

Ramesh — Sat, 08 Oct 2011 21:41:36 +0000

Thanks to author for all those nice tutorials, really good.
Am having problem in using the lcd libs downloaded on Oct 10. With this lib and sample code am not able to see any characters getting printed on LCD, I took the same sample code and used the old lib it works fine. Some changes in new libs are 1.delay has been modified, 2.In all the places 0x0F is replaced with 0xF0 and vice versa 3.#define F_CPU 10000000UL is 12000000UL in new lib. My Hardware connections and port usage are same for both codes.Pls help me to solve this issue.

By: ayaz

ayaz — Thu, 25 Aug 2011 08:30:48 +0000

your tutorials are just great it helped me a lot….
my YJ1602A 16*4 lcd module has worked successfully because of your cool lcd library but isn’t working for 20*4 lcd module 2004A . Is the library made for only 1 HD44780 controlled lcds ??? because i heard 20*4 lcd module has 2 HD44780 controllers inside……..& many thanx for other tutorials too

By: baljeet

baljeet — Mon, 22 Aug 2011 12:26:53 +0000

thanx a lot for the tutorial
my lcd is working but light of the lcd in not fully on..it shows very dul characters.

By: Rashad

Rashad — Sat, 13 Aug 2011 06:59:44 +0000

it doesnt work.

By: Avinash

Avinash — Fri, 12 Aug 2011 13:44:46 +0000

change like below and inform.
while(1) { //Read data char data[2];


data[1]='\0';
data[0]=USARTReadChar();
LCDWriteStringXY(0,1,data);
USARTWriteChar(data);

}
}