Big characters font on Text Display


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  1. #1
    Member amateurtje's Avatar
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    Default Big characters font on Text Display

    Hello,

    I have here a 4x20 HD44780 Charaketer display and I see examples of people having displayed big numbers with combining 2 rows and making glyphs ( I do not know this is an official word). I can however not find an example in picbasic.
    Did anybody ever do this and are you willing to share your project/knowledge?


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    Senior Member AlbertoFS's Avatar
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    Default Re: Big characters font on Text Display

    You can find an example HERE. The LCD display is not the same but it is very compatible. Search the routine that allows you to print 1 line.
    Regards
    Alberto
    73's de Alberto ea3agv

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    Member amateurtje's Avatar
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    Default Re: Big characters font on Text Display

    Hi Alberto,

    Thanks fro helping me. Actually I can not find it very well. Can you point me in the right direction? Is it in the Hitachi file or the 7036 file? Adn can you tell me in which bas file?
    Sorry

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    Senior Member AlbertoFS's Avatar
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    Default Re: Big characters font on Text Display

    Really all the information is in the Hitachi HD44780 LCD datasheet.
    First of all, have you written the correct declares of the LCD? See page 146 of the PDS manual.
    It is also necessary to see how a command can be sent to the LCD. LCD control command page 303 of the PDS manual.
    The LCD can be configured at initialisation with 1 line.
    If it does not work, it would have to do its own code to initialize the LCD by following the datasheet. See some examples.

    LCD commands
    https://dawes.wordpress.com/2010/01/...struction-set/
    Simple library for driving 20x4 LCD with 4bits
    https://mil.ufl.edu/3744/docs/lcdmanual/commands.html
    https://www.crystalfontz.com/blog/fa...y-2-line-mode/

    Regards
    Alberto
    Last edited by AlbertoFS; 3rd July 2018 at 22:40.
    73's de Alberto ea3agv

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    Prolific Poster towlerg's Avatar
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    Default Re: Big characters font on Text Display

    Actually, the data sheets contradict each other. I used the following in this project.

    E hi and send command nibble 0011 (3)
    E lo
    DelayMS 20
    E hi and send command nibble 0011 (3)
    E lo
    DelayMS 20
    E hi and send command nibble 0010 (2)
    E lo
    DelayMS 20
    $28 ' 4 bit mode and 2 lines
    $0C ' enable display, cursor and blink off
    $06 ' move cursor after each write
    $80 ' goto column 1 line 1

    This sub is only called if the Proton runtime reports that the display has not been initialized, weather this string would work on an arbitrarily initialized device I cannot say.
    George.

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    Member amateurtje's Avatar
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    Default Re: Big characters font on Text Display

    Maybe I am not seeing it but you guys are talking about how to print something on the screen, correct?
    But is in your scripts the possibility to print big numbers? (two lines displaying 1 big number?) So a block of 4 charakters displaying together 1 big number?

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    Member amateurtje's Avatar
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    Default Re: Big characters font on Text Display

    sorry, can not edit my message anymore, but something like this but for picbasic; http://woodsgood.ca/projects/2015/02...cd-characters/

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    Junior Member Dave Purola's Avatar
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    Default Re: Big characters font on Text Display

    Maybe you can gleen some info from here. https://www.seetron.com/bpp420/bpp420prog.html

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