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16x2 Cyrillic LCD available in USA?

Discussion in 'Electronic Components' started by larwe, May 13, 2007.

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  1. larwe

    larwe Guest

    I'm looking for a small number (2-3) of standard 16x2 LCDs with a
    Cyrillic character ROM and the standard 7-wire/11-wire Hitachi-style
    interface. Backlighting is not important, and I can make do with
    almost any size. Standard Roman LCDs don't have enough user-defined
    character spaces for my needs.

    Ideas?
     
  2. Deep Reset

    Deep Reset Guest

    Didn't some of the Hitachi-chipped displays have user-defineable characters?

    Deep.
     
  3. larwe

    larwe Guest

    Yes, it's documented in the controller datasheets (sometimes); however
    I have not found any module on the market that has a pure-RAM
    character generator. All of them have mask ROM plus a _few_ user-
    defined characters. Not enough to make up the different/missing
    letters.
     
  4. I had a suspicion that you are from sovok, but now it is more then a
    suspicuon. úÄÒÁ×ÓÔ×ÕÊÔÅ, ÄÏÒÏÇÏÊ ÔÏ×ÁÒÉÝ ËÁË ×ÁÓ ÔÁÍ ÚÏ×ÕÔ ÎÁ ÓÁÍÏÍ ÄÅÌÅ.

    VLV
     
  5. larwe

    larwe Guest

    "From" sovok?

    I have no cultural affiliation with Mother Russia (the closest I get
    is that I want to take a tour of Pripyat).

    I've simply been asked to mock up a Russian version of something that
    currently uses a 16x2/5x7 LCD.
     
  6. Guest


    Hi,

    LCD producers have a portfolio of a certain number of ROM resident
    font sets.
    Therefore I see here two ways:

    1. Find a supplier that has already produced an LCD with the Cyrillic
    font set.
    In this case, you pay just the 3 pieces you need.

    2. Place an order to a supplier, for custom LCD with the required font
    set.
    If you buy at least 2000 of these custom LCD, the supplier won't
    ask you the money for the tooling.

    Enrico
     
  7. Didi

    Didi Guest

    Not located in the USA, but should be no problem to get.

    Have a look at http://comet.bg , search for "LCD". The first of the
    LCD
    modules (fifth on the match list) returned this data sheet:

    http://home.comet.bg/datasheets/LCD/AC-162B.pdf .

    You can either figure out a way to buy from Comet in Sofia
    or find your way to the Taiwanese manufacturer directly.

    Dimiter
     
  8. Aly

    Aly Guest

    Just an idea.. In true Russian style why not construct a complete new
    display from dot matrix LED modules. Totally impractical I know, but oh so
    typically Russian. :)

    The other daft idea was to disconnect the controller and put in place your
    own.

    As I said, a bit daft, but more to cross off the list when presenting to
    Exec. You know, for some reason I thought that the Hitachi interface
    allowed the whole character set to be reprogrammed on the fly.

    Is it possible to redefine a character, print it, and then redefine again.
    What I mean is, once the UDG is on the screen, can you then go back and
    output another.

    Apologies for not being able to offer any solid answers.
     
  9. Gary Tait

    Gary Tait Guest

    I have one I pulled from an old laser printer (NEC silent writer 800 or
    something, I know it had a big board with a 68000 and a whole bunch of
    ROMs).

    The custom code on the HD44780 is A67. This particular one is EL backlit.
     
  10. Tim Dunne

    Tim Dunne Guest

    No, I assume it refetches the character each scan. This can be used to
    useful effect when designing bargraphs, strength or charge indicators; the
    last Batron I used had only 8 UD characters (standard, I think) and I needed
    two strength indicators. I just wrote a routine in the ucontroller to
    redefine a pair of characters as required - so out of 2 characters I got a
    six point signal indicator...

    Tim
     
  11. larwe

    larwe Guest

    Using only my steel dentures and solder reclaimed from stolen military
    electronics, melted over an open fire? :)

    I'm looking for a drop-in replacement (more or less) for an existing
    circuit, where I can just wire it up, change a string table, and be on
    my way. If I'm going to have to go to significant trouble, then I'll
    just use a graphic LCD.
    I'm aware of LCD controllers that offer a RAM-resident CG set for the
    whole font table, but I've never seen one in the wild (probably
    because it would waste so much ROM space in the host side of the
    equation). All the standard controllers only let you redefine a few
    characters, typically 16; the remainder are mask-ROM and you're given
    the option of a custom mask run.
    No, the controller doesn't work that way. It's not like UDGs on the
    Spectrum (are you the same Aly as in c.s.s?) which are really just a
    fancy way of accessing a fully APA display.
     
  12. larwe

    larwe Guest

    Weird! How do you know it has Cyrillic CGROM? (Or, was that
    information implicit in the ROM version?)
     
  13. larwe

    larwe Guest

    Thanks for that one... I have found several similar vendors selling
    such products, but as yet have not successfully made contact with any
    of them.

    Hmm. Suddenly, I wonder if Olimex might be able to help.
    Wow, I bet you can help if my next project requires a character LCD
    with Klingon CGROM? ;)
     
  14. Roman

    Roman Guest

    ÔÏ×ÁÒÉÝ is still a word in Russia? We (Czechs and Slovaks) ditched the
    equivalent word after 1989.

    Roman
     
  15. larwe

    larwe Guest

    Word or not, in Google Groups it's unintelligible. I don't know what
    you're seeing in my quote above, but I'm just seeing garbage hi-ASCII.
     
  16. Roman

    Roman Guest

    Coding page problem. The cyrillic from Vladimir shows fine and the word
    reads 'tovarish'.
     
  17. Roman

    Roman Guest

    Ok, I went to Google Groups and it reeally shows as garbage even
    original Vladimir's post. In my Thunderbird it shows fine in both -
    Vladimir's and mine posts.

    Oh, well. Year 2007, Unicode and all that buzz around it and they still
    cant get it right.
     
  18. larwe

    larwe Guest

    OIC. I think the word has a retro feel, totally compatible with the
    "sovok" comment. So even if not in current usage, it's appropriate :)
     
  19. What does it mean? I didn't think I knew any Russian beyond da, niet, and a
    few words picked up via Nadsat in 'A Clockwork Orange', but that one is
    definitely familiar somehow, but I can't remember why.
     
  20. nm, I went Googling.. I'm interested in whether it still has a formalised
    use though.
     
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