LCD0821

aGuy · Post by **aGuy** » Sat Feb 02, 2002 10:20 pm

Hey.

First of all, I'm new to doing anything with this stuff. I just need some help operating my LCD0821 with an OOPic2 (www.oopic.com). I have no idea what the heck most of the stuff in the manual supposed to "help" me means...

Anyhow, I'm just asking for a reply from someone who may know something about OOPics or just controllers at all, and the LCD0821. Thanks.
-J

Post by **Henry** » Sat Feb 02, 2002 11:13 pm

what do you really need? what kind of problems are you having? How are you interfacing it? I2C or Serial? What are you trying to do?

aGuy · Post by **aGuy** » Sun Feb 03, 2002 7:28 pm

Sorry for my vagueness, but I can hardly help it.

Well the OOPic has two I2C network connectors (5 pins each). I've tried to connect them to the 4 pins on the back of the LCD. What I really need to know is the integer for 5C. Is it 92? Thanks!

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<font size=-1>[ This Message was edited by: aGuy on 2002-02-04 15:39 ]</font>

aGuy · Post by **aGuy** » Mon Feb 04, 2002 6:35 pm

Hey. I got the connection, and I'm pretty sure 92's the integer for the hex "5C", but I think I need some kind of memory address for the LCD0821 or something. Help?

Jeremiah Crouse

Ghoast · Post by **Ghoast** » Tue Feb 05, 2002 3:09 am

You can convert hex to dec numbers in windows calculator in advanced mode.

Post by **Henry** » Tue Feb 05, 2002 1:34 pm

We use normal I2C protocal... this link is a great I2C FAQ...

http://www.ping.be/%7Eping0751/i2cfaq/i2cindex.htm

aGuy · Post by **aGuy** » Tue Feb 05, 2002 2:54 pm

Thanks, Henry.

That was pretty helpful. Now to test all of this knewly-acquired knowledge.

-aGuy

aGuy · Post by **aGuy** » Tue Feb 05, 2002 4:03 pm

Well, now that I'm trying out Serial, it's not working anyways. How do you send ASCII through one I/O line?. Thanks.

-J

Post by **Henry** » Tue Feb 05, 2002 8:51 pm

you just do... it's that simple... just send the commands from the processor to the lcd. there is nothing else to it. Check your cable, your signal, make sure you are using true RS232, not TTL and you should be good to go.

To clear the screen...

0xFE
'X'

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<font size=-1>[ This Message was edited by: Henry on 2002-02-05 20:51 ]</font>

aGuy · Post by **aGuy** » Thu Feb 07, 2002 9:03 pm

Yes, I did that. I've done more since then, though. I moved back to I2C, and I'm getting some help from some guy named Tony Brenke (from OOPic.com) who's worked with Matrix Orbital LCDs (talented guy-Matrix Orbital and OOPic are hard to combine...)

<FORM>
<Button type="submit" onclick="alert('I am bored')>
</Form>

<font size=-1>[ This Message was edited by: aGuy on 2002-02-07 21:06 ]</font>

aGuy · Post by **aGuy** » Thu Feb 07, 2002 9:11 pm

OOPS...I made an HTML mistake (sorry). Here's a cool thing to make up for it.

<a href="#" onmouseover="alert('I am bored')">Hi!</a>

There. From now on, no more cool html stuff (well, maybe a little...

)

-Jeremiah

<font size=-1>[ This Message was edited by: aGuy on 2002-02-07 21:12 ]</font>

Post by **Henry** » Fri Feb 08, 2002 2:26 am

Well, share the information you do get with us here for the next person that my need it. Getting a OOPic to interface with our LCDs easier is always nicer

aGuy · Post by **aGuy** » Sat Feb 09, 2002 4:32 pm

Will do.

A very useful thing to do is to plug the LCD0821 into the 40-Pin connector instead of the network connectors. They allow you to use "wide voltage" (see the LCD0821 manual for configuring specs 'n' stuff). <img src="http://www.lcdforums.com/forums/images/ ... _smile.gif" onclick="alert('Smile!')">

Also, don't forget to change the node value! The hex 0x5c is not right! It should be 0x2E (I think so...if it's not right, check with the yahoo OOPic forum articles on MO LCDs; they'll have it for sure <img src="http://www.lcdforums.com/forums/images/ ... iggrin.gif" onclick="alert('SMILE!!!')">).

I'll probably update this topic soon.

-aGuy

P.S. --my LCD died. I applied too high a voltage. I learned my lesson. NEVER USE A LANTERN BATTERY, as well as ALWAYS USE 4 1.2 DOUBLE A BATTERIES!!! That's that. I quit.
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<font size=-1>[ This Message was edited by: aGuy on 2002-02-09 16:41 ]</font>

<font size=-1>[ This Message was edited by: aguy on 2002-02-21 11:52 ]</font>

Krumthi · Post by **Krumthi** » Fri Feb 22, 2002 6:52 am

Trying to connect the LCD via serial okay so how do I do this since there isn't any clear instructions on how to do this in the manual quote from the Manual

"Serial Communications Connector.

RS-232 port: This connector is a three pin strip header. Note that this device complies to the EIA232 standard in that it uses signal levels from +/- 3V to +/- 12V. It will not operate correctly at TTL (0 to +5V) levels."

Okay like this helps. sorry to be so rude about this but there hasn't been any clear instructions on how to do this at all. To me all that stuff in the quote makes no sense to me.
If you can help me out here it would be nice

Post by **Henry** » Fri Feb 22, 2002 9:46 am

I'm not sure what the problem is.

The left connecter is there the serial connection goes. The onyl difference in this LCD is there is no DB-9 connector but a strip header. Since this LCD only needs 2 of the 9 pins from the serial cable there is no need (or room) for a big connector.

http://www.matrixorbital.com/manuals/lc ... abeled.jpg
Updated manual...