GPS Week Number Rollover [WNRO] JUST Findings, Fixes, and Frustrations

I've been looking a bit around concerning the GL1. I'm pretty convinced now that these units won't receive an official update from TomTom. The GL1/Hammerhead chip was launched sometime around 2004. The most prominent device using this chip is probably the opensource linux-based OpenMoko Neo1973 smartphone. Due to their stance towards promoting opensource and openhardware, they were not happy that the A-GPS chip came with a closed-source binary blob "gllin". There were quite some efforts reverse engineering the binary and to create an opensource interface, however unsuccessful, and with the release of the newer OpenMoko Neo FreeRunner, which uses a different GPS chip, there wasn't much interest in pursuing further reverse engineering.

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This binary-to-NMEA-converter "gllin" is probably what is "gltt" on our TomToms. Now it seems this is not so closed-source, but possibly handed to TomTom under an NDA. I believe this because TomTom was able to make adjustments, e.g. they hard-coded the file name of the output fifo to be "/var/run/gpspipe", while it is different in "gllin". Anyway, it's a closed-source blob and probably even if TomTom wanted, they can't release the source, as was requested by someone on their forum.

This brings me to the conclusion as to why TomTom won't fix GL1 devices: GL2 "Barracuda" is - as the name unambiguously suggests - the successor (launched in 2007/2008 still by Global Locate) to GL1 "Hammerhead" (note how they seemed to like fish ). I guess both blobs "glgps" and "gltt" aren't too different. If TT was able to fix the bug in "glgps", it shouldn't be much more difficult to fix "gltt". Or maybe they don't have access to the source anymore (contractual agreement)? In that case, I don't see why Broadcom would submit a patch for "glgps" but hold back on "gltt", if it was available. So, unless Broadcom decides to publish the source for the translator, I don't think we can expect an official update for GL1 devices!

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Try my navcore (post #230):

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I have a Rider2 (SIRF 3) in the summer village that I thought I would use during the holidays next month. What should I do with it?

Just use it. It should be fine. Maybe you need a suicide.dat. But from what I've heard from Rider-2-users so far there is no problem, contrary to other SiRF3 units.

Hi all. I have a tomtom one v8 with the GL1 antenna, with 32 RAM, with the navcore 9541 and the map 1030.9524. From April 6 I have the problem of the hour that stays at 00:00 and problems with the reception of the satellites.

Given this, my question is that if with the ttconv-v9, the problem of the time and reception of the satellites would be solved?

Another thing how to install and where the ttconv-v9 file is installed?

where is the patch ttconv-v9?

I hope your answer

Warm regards to all

@rafita-jerez use ttconv-v11. It's on rima-lock.com. just extract to ur TomTom. This will fix the time issue. There should be no reception problem with GL1.

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@treysis: Can you please tell use where we can find ttconv-v11? Or attach it in this thread is even better

Peter

Is it here ?? Not sure as I don't need it !

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If the fix is not working for you, you can delete the ttn File.
Than the Tomtom Rider will start without the fix... of course with broken time.
this fix also works with some other Tomtom´s ONE 3rd, ONE XL, XL 2008 with GL1 chipset...