[op25-dev] Re: Updating the OP25 codebase

Keith S ktsangel69 at yahoo.com
Fri Mar 8 19:09:32 UTC 2013


I'm not much of a coder but I can assist in taking captures of a p25 phase II system. There is a site near me.

I have a gnuradio setup using rtlsdr dongles. Let me know how and what you would like me to capture. There are audio channels and a Motorola trunking control channel on this site. I've done some basic decoding of the control channel with some windows apps already but haven't tried anything with gnuradio yet.

Keith 

ikj1234i <ikj1234i at yahoo.com> wrote:

>
>
>Hello Stevie
>
>Good to hear from you - this sounds like a good idea, for sure.
>
>It's always tempting to take such an opportunity as this to rewrite the entire system from scratch :)
>
>I think another piece to add to the puzzle that perhaps might be broken out as a separate item of concern would be UHD support.  
>
>Mostly I think that would affect our py code but not so much our C++ blocks.
>
>Also when you added the fsk4 demod block to the op25 core it took me longer than it should but as of a few days ago I checked in several remaining stragglers to svn, all of our py code is now upgraded to use the in-tree version.  I think there may have been one or two _very_ old ones that still use Franks' p25 and RD-LAP protocol handlers, but those apps date back to the days before our project had its own protocol processing...
>
>Also for GR 3.6 in addition to cmake there is a new directory structure that apps are to conform to.
>
>Looking further out there is some very exciting new stuff coming in GR for handling packet-oriented streams with timed transmission features.  This looks like it should be a good fit for our repeater work, but will require effort to make use of the new capability. 
>
>Finally, we're interested in P25 phase II, and are looking for RF captures of various phase II scenarios.
>
>Best
>
>Max
>
>--- In op25-dev at yahoogroups.com, Steve Glass <stevie.glass at ...> wrote:
>>
>> Hi Everyone
>> 
>> I think its time to organize a drive to move the code to the latest version
>> of GNURadio. The OP25 codebase is suffering badly from bit rot and that
>> needs fixing. GNURadio has evolved and developed many new features we've
>> not properly kept up with. Fixing the codebase will mean that we can get
>> people working with much less hassle than at present.
>> 
>> I've created a wiki
>> page<http://op25.osmocom.org/wiki/wiki/ReengineeringPage>to act as the
>> starting point. I shall start opening tickets this week and
>> start mapping out the direction of the exercise. For now I want to focus
>> the effort on the core OP25 components and we can use GRC as our top-level
>> test harness. Take a look and take part in the discussion.
>> 
>> Atb
>> 
>> Steve
>>
>
>
>
>
>------------------------------------
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