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CCS/EK-TM4C1294XL: Kentec Touchscreen BoosterPack calibration app

Helder Sales
Expert 1220 points
Part Number: EK-TM4C1294XL

Tool/software: Code Composer Studio

Hi,

I'm trying to calibrate my screen, the buttons are responding in the wrong locations (a bit off on the left side). But I can't find any application to do that.

This link mentions a "calibrate application", but I couldn't find any (and the link inside the PDF to explain the calibration is broken).

http://www.sfu.ca/~eeshiken/TivaWare_C_Series-2.1.4.178/docs/SW-EK-TM4C123GXL-BOOSTXL-KENTEC-S1-UG-2.1.4.178.pdf

There's at least something that helps with the calibration? Because the touch.c has many numbers and do not explain what they actually do (I imagined it would be just X, Y and Z, three numbers).

#ifdef LANDSCAPE
    328192,                     // M0
    -4352,                      // M1
    -178717056,                 // M2
    1488,                       // M3
    -314592,                    // M4
    1012670064,                 // M5
    3055164,                     // M6
#endif

Regards,

Helder

  • 0
    TI__Guru*** 135355 points
    Hello Helder,

    The link in the document was this one: www.embedded.com/.../How-To-Calibrate-Touch-Screens

    Not sure how helpful it will be, but that's the missing resource.

    We aren't really experts with that screen as we don't make it. It's a third party resource at the end of the day, and not a TI product. I didn't find a lot of information about calibration but if needed I can look further tomorrow when in the office.
  • 0 in reply to Ralph Jacobi
    Expert 1220 points

    Hi Ralph,

    I'm no expert with that screen either...I tried to use the resource material, but I don't have any clue how to proceed with the Kentec screen. If you find any information, I would be very grateful.

    At least I may try to correct it by trial and error.

    Regards,

    Helder

  • 0 in reply to Helder Sales
    TI__Guru*** 135355 points
    Hello Helder,

    I did some more checking but came up empty. Actually from what I can see, it doesn't look like anyone at TI really has knowledge on this topic. I saw some references about asking Kentac for help but it wasn't clear if that was useful - perhaps something you can try. Sorry we can't be of more help...
  • 0 in reply to Ralph Jacobi
    Expert 1220 points
    Hi Ralph,

    No need to be sorry, I wish to thank you for trying to help. I just assumed that someone here would be more familiar with that screen, because it's a BoosterPack and there is a driver for TM4C boards.

    Anyway, I'll do a bit of research and try to ask Kentec, if not successful, I still have the piece of code that I can modify and observe the results (not a optimized way, but works...).

    Regards,

    Helder