[FSO] Speed gps time to firxt fix up?
lothar.behrens at lollisoft.de
Sat Jan 3 15:26:34 CET 2009
I haven't success.
My FSO is the 'more homework' version 4.1.
Installing gpsd really installs fso-gpsd. Installing tangogps complains
about having two
versions matching gpsg, eg. the fso-gpsd and the compatibility (gpsd)
wrapper that seems
to be installed with fso-gpsd.
What version do you use exactly (image locations) ?
> I'll try that too. Also when the connections to the port are more than 0
> it could be
> 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
>>>> 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
>>>> the TTFF without agps is always quite slow.
>>>> Openmoko community mailing list
>>>> community at lists.openmoko.org
>> Openmoko community mailing list
>> community at lists.openmoko.org
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