Welcome guest, is this your first visit? Click the "Create Account" button now to join.
Results 1 to 4 of 4
  1. #1
    Junior Member
    Join Date
    Dec 2015
    Location
    With my mommy
    Posts
    2
    Rep Power
    0

    Default Requirements for use of calibration file

    I have read about half of this entire forum by now, as wel as TomTom's own and Navi Total's, so far without finding an answer.

    My Go Classic is still working after 10 years, but it now seems to have digitizer trouble, as the leftmost column of characters can no longer be reached. I played around with the keyboard options large/small and QWERTY/ABCD. No luck.

    I have tried the non-invasive operation, removing bits of dirt around the edges. No luck.

    I placed a cal.txt file in the root of the SD card with modified settings. I checked the HW settings: the cal.txt is disregarded.

    Now I wonder: is there a minimum requirement in bootloader and/or navcore for this calibration file to work? Or is it purely hardware dependent?

  2.    Advertissements


  3. #2
    TomTom Expert

    biggerdave's Avatar
    Join Date
    Dec 2011
    Location
    Darn sarf
    Posts
    1,780
    Rep Power
    508

    Default

    Nothing to do with bootloaders, just cal.txt etc. unfortunately it's not a exact science & you need to try a few small changes each time until you get the right set-up specifically for your actual device.

    All I can suggest is more reading around here [Only registered and activated users can see links. ]
    Please do not post "thanks" but use the "reputation" star(*) bottom/left or "like" bottom/left buttons
    S i m p l e s

    PS If you find any dead links on MY posts please pm me & I'll try to fix/reload

  4. #3
    Junior Member
    Join Date
    Dec 2015
    Location
    With my mommy
    Posts
    2
    Rep Power
    0

    Default

    Mmmm, I have been working in IT since the previous millennium (1984, to be precise) and at any time when a config file is to be taken into account on any hardware and operating system, this is done by code. That code can either be an application program or a (embedded) bootstrap program.

    On many computers you have a core prog like a BIOS, on the TomTom this seems to be the bootloader.
    Such bootstrap programs are known to have parameter files nowadays, you used to have to "burn" them with a separate tool - I'm referring to EEPROMs here.

    Given that TomToms runs on a modified Linux operating system, this is called by the bootloader, I guess.
    Navcore is in my understanding an application program that is called from Linux.
    Or maybe Navcore *is* the modded Linux plus the application program rolled into one?

    Maps are just data files that go (or not) with a specific version of the application program.

    A calibration file is also just a data file. It will either be called from the bootloader, from the OS or from Navcore. Hence my question what it is that uses the file.


    The link you sent is useful though: I see there that Navcore 8.051 and previous used a file called calib.txt instead of cal.txt. Although I have Navcore 9.510 installed, cal.txt is not recognized. I'll have a try with a calib.txt instead.

    Cheers!

  5. #4
    TomTom Expert

    biggerdave's Avatar
    Join Date
    Dec 2011
    Location
    Darn sarf
    Posts
    1,780
    Rep Power
    508

    Default

    That's all way too technical for an oldie like me but there's also this (similar) instruction attached
    Attached Files Attached Files
    Last edited by biggerdave; 1st January 2016 at 08:58.
    Please do not post "thanks" but use the "reputation" star(*) bottom/left or "like" bottom/left buttons
    S i m p l e s

    PS If you find any dead links on MY posts please pm me & I'll try to fix/reload

 

 

Tags for this Thread

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
  •  
This website uses cookies
We use cookies to store session information to facilitate remembering your login information, to allow you to save website preferences, to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.