GPS tracking application

I need to log GPS coordinates (time and position) every x seconds. I 
have a GPS receiver connected through RS232. Together I have to log 
measures from sensors connected to another RS232 port (proprietary 
protocol).

I think the GPS real-time tracking is almost standard so I think there 
are many hw/sw already available. Is there a software sufficiently 
flexible to join my custom sensors data to GPS data? Or an open-source 
GPS real-time tracking software to customize?

pozzugno wrote:
> I need to log GPS coordinates (time and position) every x seconds. I 
> have a GPS receiver connected through RS232. Together I have to log 
> measures from sensors connected to another RS232 port (proprietary 
> protocol).
> 
> I think the GPS real-time tracking is almost standard so I think there 
> are many hw/sw already available. Is there a software sufficiently 
> flexible to join my custom sensors data to GPS data? Or an open-source 
> GPS real-time tracking software to customize?

Sparkfun have an "hw/sw", arm based, combination for serial-to-sd 
logging called Logomatic with at least a pair of different firmware with 
available sources
it can be a good starting point, but I think you must add the second 
uart driver/logger to the original firmware