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'[OT] Where is Optrex'
1998\07\28@024811 by Mitchell D. Miller

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Does anyone know whether Optrex has a Web presence?  I've done quite a bit of looking around, and have found lots about LCDs, but no Optrex (Optrex.com appears to be someone else).  

Also, where I can I get _real_ docs on interfacing to LCD panels using Hitachi's 44780 controller?  I've found lots of sample code, and lots of timing diagrams, but nothing that explains (well) the commands, etc. this device expects to receive.  A bunch of code samples I recently reviewed demonstrated sending an initialization sequence (I believe the binary representation of the byte sent was 0011xxxx) three times with differing pauses between each before finally sending the 4 bit interface initializer (I believe 0010xxxx) ... can anyone explain why?  

Thanks,
Mitch

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Mitch Miller, Roseville, CA
spam_OUTmitchmTakeThisOuTspamns.net
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1998\07\28@034646 by David Lions

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www.optrex.co.jp

1998\07\28@094122 by Corrine

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For the Optrex's Web site :  'http://www.optrex.co.jp'.


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From: Mitchell D. Miller <.....mitchmKILLspamspam@spam@NS.NET>
To: PICLISTspamKILLspamMITVMA.MIT.EDU
Subject: [OT] Where is Optrex
Date: 28 juillet, 1998 02:47

Does anyone know whether Optrex has a Web presence?  I've done quite a bit
of looking around, and have found lots about LCDs, but no Optrex
(Optrex.com appears to be someone else).

Also, where I can I get _real_ docs on interfacing to LCD panels using
Hitachi's 44780 controller?  I've found lots of sample code, and lots of
timing diagrams, but nothing that explains (well) the commands, etc. this
device expects to receive.  A bunch of code samples I recently reviewed
demonstrated sending an initialization sequence (I believe the binary
representation of the byte sent was 0011xxxx) three times with differing
pauses between each before finally sending the 4 bit interface initializer
(I believe 0010xxxx) ... can anyone explain why?

Thanks,
Mitch

------------------------------------
Mitch Miller, Roseville, CA
.....mitchmKILLspamspam.....ns.net
------------------------------------
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1998\07\28@100708 by Stefan Sczekalla-Waldschmidt

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( ... )

> Also, where I can I get _real_ docs on interfacing to LCD panels using
> Hitachi's 44780 controller?

have a look at Hitachi.

There is a PDF document referring the HD44780U with about 60 pages.
the first third covers pinout etc. later it covers commands and howto use etc.

kind regards
       Stefan Sczekalla-Waldschmidt

1998\07\28@122743 by David W. Duley

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In a message dated 98-07-28 02:51:57 EDT, you write:

<<
Does anyone know whether Optrex has a Web presence?  I've done quite a bit of
looking around, and have found lots about LCDs, but no Optrex (Optrex.com
appears to be someone else).

Also, where I can I get _real_ docs on interfacing to LCD panels using
Hitachi's 44780 controller?  I've found lots of sample code, and lots of
timing diagrams, but nothing that explains (well) the commands, etc. this
device expects to receive.  A bunch of code samples I recently reviewed
demonstrated sending an initialization sequence (I believe the binary
representation of the byte sent was 0011xxxx) three times with differing
pauses between each before finally sending the 4 bit interface initializer (I
believe 0010xxxx) ... can anyone explain why?

Thanks,
Mitch

------------------------------------
Mitch Miller, Roseville, CA
EraseMEmitchmspam_OUTspamTakeThisOuTns.net
------------------------------------
 >>
Hello Mitch!

Try http://www.optrex.co.jp/us/products.html

I can also put you in touch with a california optrex rep. if you need to buy
lots of whatever you are looking for.
Hope this helps

Dave Duley

1998\07\29@012209 by Peter L. Peres

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On Mon, 27 Jul 1998, Mitchell D. Miller wrote:

> Also, where I can I get _real_ docs on interfacing to LCD panels using
> Hitachi's 44780 controller?  I've found lots of sample code, and lots of
> timing diagrams, but nothing that explains (well) the commands, etc.
> this device expects to receive.  A bunch of code samples I recently

Be glad, that you got code examples. When I did my 1st there weren't any,
just an approximately translated manual. I took me about a week's worth of
removed hair (pulled out strand by strand), to find out that on this
particular display, high contrast is high voltage on Vcl, and only then
did I start getting into the real fun ;)

> reviewed demonstrated sending an initialization sequence (I believe the
> binary representation of the byte sent was 0011xxxx) three times with
> differing pauses between each before finally sending the 4 bit interface
> initializer (I believe 0010xxxx) ... can anyone explain why?

Many of these displays have a brownout/reset problem exactly like some
PICs. The initialization sequence that you describe is recommended by the
manufacturer to recover the device from such an improper reset at startup.
It is good for you if you stick to it until you have a working system and
test for brownout etc.

hope this helps,

       Peter

1998\07\29@143223 by Madis Kaal

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>Also, where I can I get _real_ docs on interfacing to LCD panels using
>Hitachi's 44780 controller?  I've found lots of sample code, and lots
>of timing diagrams, but nothing that explains (well) the commands, etc.

There are .pdf files available at hitachi site. Takes some searching
but I found them a while ago.

1998\07\30@010620 by Mitchell D. Miller

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part 0 630 bytes
-- Mitch

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Mitch Miller, Roseville, CA
mitchmspamspam_OUTns.net
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{Original Message removed}

1998\07\30@020441 by Alan Vogel

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Try the following:

http://www.optrex.co.jp/us/lcd_us/index.html

-----Original Message-----
From: Mitchell D. Miller <@spam@mitchmKILLspamspamNS.NET>
To: KILLspamPICLISTKILLspamspamMITVMA.MIT.EDU <RemoveMEPICLISTTakeThisOuTspamMITVMA.MIT.EDU>
Date: Wednesday, July 29, 1998 10:06 PM
Subject: Re: [OT] Where is Optrex


>Can you provide a URL?  I've been looking for 3 days, and can not seem to
find _any_ .PDFs ... ??
{Quote hidden}

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