Nils Faerber wrote:
Ian Stirling schrieb:
Nils Faerber wrote:
Hi!
I am interested in doing a little research on the AGPS part. As far as I
understood the used Hammerhead chip will dump out the more or less raw
GPS data into userland which will then need to be post-processed in
order to get the usual NMEA or whatever messages.
So, can OpenMoko provide at least somemore information about that chip
and especially its output?
No, the chip is under NDA.
Darn.
I do not care aout most of the chip, just the output format ;)
There probably isn't a clear line.
http://wiki.openmoko.org/wiki/Hardware:AGPS has the current state of play.
Basically, the satellite format is known, and not especially hard to
decode especially if we also get NMEA (or whatever) output out of the
supplied daemon at the same time to decode it.
You mean some kind of reverse engeneering trying to match the NMEA
output to the raw input?
The gpsd will output assorted parameters, including current position, ...
You can take this - or even output from a nearby (1m) GPS, and the
bitstream input and output to the GPS chip, and try to work out what the
chip sends out.
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