[FSO] Speed gps time to firxt fix up?
lothar.behrens at lollisoft.de
Sat Jan 3 14:31:51 CET 2009
I'll try that too. Also when the connections to the port are more than 0 it
useful to disabling illume to lower the brightness and the like.
Is this possible within a script ?
Fox Mulder wrote:
> I did nothing special.
> I only deinstalled gpsd and installed fso-gpsd. Some time ago fso-gpsd
> wasn't working good at all. But a few weeks ago i tried again to replace
> gpsd with fso-gpsd and since than it works ok.
> Interesting is that with fso-gpsd the gps chip is activated as soon as a
> connection to the fso-gpsd port is opened. And it is deactivated when
> the last connection closes. This feature has pros and cons but at the
> moment i like it. :)
> lollisoft wrote:
>> what did you made to get GPS working in general ?
>> See my post about GPS ...
>> Fox Mulder wrote:
>>> Since a few weeks i'm using fso-gpsd without any big problems so far.
>>> The only problem is that the TTFF (time to first fix) is always >1
>>> minute and sometimes it needs quite a lot of time. The only solution for
>>> me to be sure to get a fix within <30 sec is to use the agps tool which
>>> downloads the almanac and ephemeris from ublox for my region.
>>> The problem is, that the gps chip doesn't have any internal memory why
>>> it needs to download all relevant gps data every time it is powered up.
>>> So i thought if it is possible to save the relevant gps data before
>>> shutting down the gps which can be done by fso-gpsd or kernel
>>> automatically. Than after starting the gps fso-gpsd/kernel feeds back
>>> the data to speed up the TTFF. This would be the same way most gps
>>> receivers work.
>>> Maybe this is already implemented somewhere but i don't think so because
>>> the TTFF without agps is always quite slow.
>>> Openmoko community mailing list
>>> community at lists.openmoko.org
> Openmoko community mailing list
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