Results 1 to 9 of 9

Thread: A question for parallel LCD users

  1. #1
    Newbie
    Join Date
    Oct 1999
    Location
    Puyallup, WA USA
    Posts
    17

    A question for parallel LCD users

    With your LCD connected to the parallel port, is it possibe to sent ASCII characters to the LCD from a DOS batch file?
    Example: ECHO BOOTING COMPUTER > LPT1

  2. #2
    Newbie
    Join Date
    Oct 1999
    Location
    Yukon, ok , USA
    Posts
    43
    You should be able to. I used something simmilar when trying out a serial module for a LCD. But I used a copy con com2. What you have should work as well.

    The best way is to just try it. If it works is works. If not well we know it will not.

  3. #3
    Newbie
    Join Date
    Oct 1999
    Location
    Puyallup, WA USA
    Posts
    17
    I would try it if I had my LCD. I just ordered it a few days ago and I am anxiously awaiting it's arrival.

  4. #4
    Variable Bitrate
    Join Date
    Jul 1999
    Location
    West palm Beach , Fl, USA
    Posts
    291
    Where did you buy your LCD?

  5. #5
    Variable Bitrate
    Join Date
    Aug 1999
    Location
    Yorba Linda, CA
    Posts
    323
    Actually, it doesn't work Most LCDs require not only ASCII text data, but special control signals as well. Simply sending raw ASCII won't make it show up on the character LCD module. First there is an initialization sequence and then each character needs to be clocked into the LCD's internal RAM.

    It wouldn't be hard to write a program to pipe text to it that you could use in a batch file... I have a simple C program for DOS that lets you type characters and have them show up, like a word processor.

    Serial LCDs have all the "brains" needed to convert serial ASCII into control & data signals to talk to the LCD properly, and DOS knows how to send standard serial data, so that is why you can pipe text into a serial LCD so easily.



    --Jason
    http://jump.to/m2pc
    Jason Johnson
    Yorba Linda, California
    http://www.m2pc.com

    MPC Phase IV - *** PENDING ***

  6. #6
    Newbie
    Join Date
    Oct 1999
    Location
    Puyallup, WA USA
    Posts
    17
    mpRover: I bought my LCD from cnetsolutions.com. It's a 4x20 w/blue-green EL backlight and HD44780 controller.

    jjohnson: where can I get your program (or source code?)

  7. #7
    Newbie
    Join Date
    Aug 1999
    Location
    Wigan, UK
    Posts
    18
    Try here

    http://www.geocities.com/SiliconValley/Peaks/9546/player/OtherUtils.html

    This is a prog called LCDPrint that lets you sent a DOS batch file to a parallel port LCD panel.

    Works well.

  8. #8
    Newbie
    Join Date
    Nov 1999
    Posts
    1
    uhm cnetsolutions.com is an isp..
    Where did you buy your lcd from again?

  9. #9
    Variable Bitrate
    Join Date
    Sep 1999
    Location
    Yarmouth NS, Canada
    Posts
    336
    If you look near the top of the page I think there is a link to a sale.. They have a lot of LCDs actually. I was confused first myself heh.
    MP3 Cavalier - http://www.mp3cavalier.com
    MP3 Grand Prix - http://www.mp3gp.com

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •