Post by thread:[OT] Where is Optrex

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 spam_OUTmitchmTakeThisOuTns.net ------------------------------------

For the Optrex's Web site : 'http://www.optrex.co.jp'. ---------- From: Mitchell D. Miller <.....mitchmKILLspam@spam@NS.NET> To: PICLISTKILLspamMITVMA.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 .....mitchmKILLspam.....ns.net ------------------------------------ ----------

( ... ) > 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

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_OUTTakeThisOuTns.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

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

>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.

Try the following: http://www.optrex.co.jp/us/lcd_us/index.html -----Original Message----- From: Mitchell D. Miller <@spam@mitchmKILLspamNS.NET> To: KILLspamPICLISTKILLspamMITVMA.MIT.EDU <RemoveMEPICLISTTakeThisOuTMITVMA.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}> >-- Mitch > >------------------------------------ >Mitch Miller, Roseville, CA >spamBeGonemitchmspamBeGonens.net >------------------------------------ > >-----Original Message----- >From: Madis Kaal [SMTP:TakeThisOuTmastEraseMEspam_OUTNOMAD.EE] >Sent: Wednesday, July 29, 1998 2:20 PM >To: RemoveMEPICLISTTakeThisOuTMITVMA.MIT.EDU >Subject: [OT] Where is Optrex > >>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. >