On Wednesday 25 August 2010, Dmitry Shalnoff wrote: > Hello list, > > Do anybody know how to bake AGPS packet for fast waking up the GPS > module? and what device file I have to use to send it in the module? > > Is it the same as a normal NMEA packet just with a correct time or they > are different? maybe anybody give any links to some reasonable > instructions about that?
The manufacturer's documentation of the chipset and protocol is here: http://www.u-blox.com/en/download/documents-a-resources/antaris-4-gps-modules- resources.html The protocol documentation is in MS Help format. You can find some code examples at freesmartphone.org if you look in the framework under ogpsd. There is a ubx parser in python that can read and write packets, and code that uses this to store initialisation data before shutdown, then load it at startup. http://git.freesmartphone.org/?p=framework.git;a=tree;f=framework/subsystems/ogpsd;h=1c6a3d626bf35bb0a9b169856dc297017c28eccb;hb=HEAD If you just want to seed it time and location you can create the packet directly. If you want almanac and ephemeris you will need to save them for later reuse as ogpsd does, or fetch them from the ublox AGPS server. See also http://wiki.openmoko.org/wiki/Neo_FreeRunner_GPS _______________________________________________ Shr-User mailing list [email protected] http://lists.shr-project.org/mailman/listinfo/shr-user
