Hi,
On 02/26/2016 02:39 PM, jimlux wrote:
On 2/26/16 3:34 AM, Björn wrote:
"The product will not report the correct extended GPS week number
after the Feb,13th 2016.
After the rollover to week #860, the thunderbolt will not make
position for 2 hours, because the Ephemeris data on the GPS receiver
being consider incorrect.
The module will work fine after this 2 hours."
Have the Motorola Oncore/Navman/Jupiter receivers also been checked
for this condition?
Strange that at least 3 independant firmware trees/development teams
should chose the same magic wk860.
Actually not that weird.
They might all have inherited a published code snippet. There's a
little table driven chunk of code to compute CRCs that pretty much
everybody uses, and it derives from some article published in the 70s or
early 80s for an 8 bit micro.
Indeed. I know of at least one GPS chip vendor that with their developer
kit provided code. Some code inheritance might be proper, but some might
be unintentional or not even valid license-wise. Very nice way to
inherit bugs, as we know what they are... eventually.
Would still love to see some of that code. Somebody got a copy of the
Marconi/Zarlink code?
Cheers,
Magnus
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