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VGA driver for text and graphics? — Parallax Forums

VGA driver for text and graphics?

Chris MicroChris Micro Posts: 160
edited 2009-05-04 00:34 in Propeller 1
Is there a VGA driver for displaying text and graphics?
I want do display some measurement data in a graph and to print some text on the sreen.

tnanx,
chris

Comments

  • Mike GreenMike Green Posts: 23,101
    edited 2009-05-03 06:13
    There's a group of VGA drivers in the Object Exchange with different resolutions that can provide small areas of graphics plus text on the rest of the screen. The size limitation is based on memory requirements for the graphics bitmaps. Look at the associated demo program for examples of graphics use.

    Here's one: obex.parallax.com/objects/176/
  • Chris MicroChris Micro Posts: 160
    edited 2009-05-03 10:06
    Hi Mike,

    thank you for the hint. I use an old LCD-Monitor with a resolution of only 1024x768. I looked througt the Object Exchange but I couldn't find a driver suitable for this resultution which can display text and graphics. I will try the example you posted and see if it works.

    chris
  • RaymanRayman Posts: 14,827
    edited 2009-05-03 13:12
    1024x768 is the main resolution I use for my "real" applications...

    I use a Parallax driver that I'm not sure is in OBEX...

    But, I have a link to it on this page (first link):

    http://www.rayslogic.com/propeller/Users/3rdParty.htm
  • RaymanRayman Posts: 14,827
    edited 2009-05-03 13:13
    Also,·at the very bottom of this page:

    http://www.rayslogic.com/propeller/Programming/Programming.htm

    I have notes on how to move and resize the graphics window...
  • Oldbitcollector (Jeff)Oldbitcollector (Jeff) Posts: 8,091
    edited 2009-05-03 13:47
    @Rayman:

    Your site is incredibly handy. Wish you'd add it to your .sig. [noparse]:)[/noparse]

    OBC

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  • ElectricAyeElectricAye Posts: 4,561
    edited 2009-05-03 15:34
    Rayman,

    thanks for posting this info about VGAs. I found that the stuff that was already on the OBEX was tragically void of comments so I've been reverse engineering color codes, etc. to get things working. I wish I had known about your site before.

    you the man,
    Mark

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  • Chris MicroChris Micro Posts: 160
    edited 2009-05-03 19:14
    Hi Rayman, thanks for the links. The last driver works smile.gif
  • Beau SchwabeBeau Schwabe Posts: 6,568
    edited 2009-05-03 19:26
    Chris Micro,

    Here is another option that might be of some use. This was more of a learning exercise for myself, but I took the 2-bit color graphics routines from the TV Graphics demo, and converted them into a 1-bit version to work with the VGA.

    http://forums.parallax.com/showthread.php?p=606957

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    IC Layout Engineer
    Parallax, Inc.
  • RaymanRayman Posts: 14,827
    edited 2009-05-03 21:57
    OBC:· Good idea!

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    visit http://www.rayslogic.com
  • RossHRossH Posts: 5,511
    edited 2009-05-04 00:34
    Hi Chris,

    Another option - there's a virtual VGA driver for the propeller that can do both text and vector graphics at resolutions up to 1152x864 (2 colour) or 800x600 (4 color) - provided you don't expect to be able to fill the screen with content (as Mike points out - there just isn't enough RAM on the propeller to do that!). It also requires 5 cogs.

    I never put this driver in the OBEX because I always intended to do more work on it - but you can find it as part of the VGA versions of SpaceWar or BattleZ0wned. The driver supports most of the standard Parallex graphics functions (e.g. text, arcs, lines, etc).

    For an example, see the thread at http://forums.parallax.com/forums/default.aspx?f=33&m=281452

    Ross.
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