Re: [Discuss-gnuradio] Porting cgran AIS to the new cmake build system

On 18/07/12 09:13, Darren Long wrote:
> Hi Chris,
>
> Might I be so bold to suggest that in your efforts, you consider using
> the gr-osmosdr abstraction (http://sdr.osmocom.org/trac/wiki/GrOsmoSDR)
> so that the RTL-SDR could be used too. In fact it supports UHD, FCD and
> RTL-SDR, and works well in gqrx for example.

Hi,

That sounds interesting, actually, that was on my plan to try the RTL
hardware once I'm happy enough. If i'm not wrong this RTL is the related
to the chip found on some cheap DVB receiver, isn't it?

AFAIU, the ais_rx.py script is half about setting up UHD, and half about
the decoding itself.
I just had a look at gr-osmosdr, and it seems so far quite straight
forward to use.

Nick has just updated his git repo with the cmake branch. I'll give it a
try tonight.

Nick, do you have any thought on this? It would be really nice to get
ais_rx.py be usable with different hardware.

Chris

>
> Sorry for being cheeky :P

You wasn't, it sounds like a good idea indeed!

Chris

>
> Darren
>
> On 17/07/12 22:43, Christian Gagneraud wrote:
>> On 17/07/12 22:24, Nick Foster wrote:
>>> Christian,
>>>
>>> Are you using the version found here?
>>>
>>> https://github.com/bistromath/gr-ais
>>>
>>> If not, please use this version, as it is significantly more up-to-date
>>> than the one on CGRAN. I'm going to change the CGRAN page to point to
>>> the Github repository.
>>
>> Interesting.
>>
>> Would you be interested in getting it ported to the new build system?
>> If so, I'll redo the work on your tree.
>> As well, I realised that ais_received.py is tailored for the USRP.
>> I'm currently using a funcube dongle, so I might as well contribute
>> with a dedicated script, once i start to get things working.
>>
>> Chris
>>
>>
>>>
>>> --n
>>>
>>> On Tue, Jul 17, 2012 at 1:42 PM, Christian Gagneraud <chris@techworks.ie
>>> <mailto:chris@techworks.ie>> wrote:
>>>
>>> On 17/07/12 21:31, Josh Blum wrote:
>>>
>>>
>>>
>>> On 07/17/2012 01:27 PM, Christian Gagneraud wrote:
>>>
>>> Hi,
>>>
>>> I tried to build https://cgran.org/wiki/AIS against
>>> gnuradio-3.6, and i
>>> fails.
>>> As 3.6 brings in a new build system, I decided to give it a
>>> go on the
>>> AIS module. I based everything on gr-howto-write-a-block
>>>
>>> [...]
>>>
>>> ImportError:
>>> /usr/local/lib/python2.7/site-__packages/ais/_ais_swig.so:
>>> undefined symbol: _Z14ais_make_shiftv
>>>
>>>
>>> Just a guess, but
>>>
>>> In gnuradio we explicitly export the library symbols. If you
>>> arent doing
>>> that for libgnuradioais, make sure that the visibility flag is
>>> being set
>>> to default. You can read more here:
>>> http://gcc.gnu.org/wiki/__Visibility
>>> <http://gcc.gnu.org/wiki/Visibility>
>>>
>>>
>>> Hi Josh,
>>>
>>> Actually, I've just discovered this was needed! So, yes that was it.
>>> No it's complaining about usrp stuff, but it's another story. I
>>> don't have a USRP, I'm using a FUNcube dongle.
>>>
>>> BTW, should I make this package install in
>>> lib/python2.7/site-packages/__gnuradio/ais instead of
>>> lib/python2.7/site-packages/__ais
>>> Same with the include dir: include/gnuradio/ais instead of
>>> include/ais?
>>>
>>> I would like to be able to use gnuradio-companion, and pick up the
>>> AIS block from the selection list, but it's not there. This might be
>>> due to the current install dir. Any comment?
>>>
>>> Chris
>>>
>>>
>>>
>>>
>>>
>>> -josh
>>>
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>>>
>>>
>>>
>>> --
>>> Christian Gagneraud,
>>> Embedded systems engineer.
>>> Techworks Marine
>>> 1 Harbour road
>>> Dun Laoghaire
>>> Co. Dublin
>>> Ireland
>>> Tel: + 353 (0) 1 236 5990 <tel:%2B%20353%20%280%29%201%20236%205990>
>>> Web: http://www.techworks.ie/
>>>
>>>
>>>
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>>>
>>
>>
>
>
>
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--
Christian Gagneraud,
Embedded systems engineer.
Techworks Marine
1 Harbour road
Dun Laoghaire
Co. Dublin
Ireland
Tel: + 353 (0) 1 236 5990
Web: http://www.techworks.ie/



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