I've been poking around in other GRC files to find examples. The ones in specest are a little tough around the edges, but I've found the ones in GNURadio/gr-fft and other sub blocks of GNURadio to be decent examples. Rgrep has been helpful...
Jared On Oct 8, 2013 1:26 AM, "Eskil Varenius" <eskil.varen...@gmail.com> wrote: > Hi again, > I uninstalled what I had installed through PyBOMBS and installed Gnuradio > 3.7 through the build_gnuradio script. Then I tried Jareds repo for specest > with 3.7 (http://www.github.com/dfxx) and it seems to compile just fine, > well done! I can also import specest in python without problems. > > Now: I would very much like to use the block moving_average_vff in > Gnuradio Companion. Unfortunately it seems there are no xml files for that > block, hence invisible to the GRC. I got a hint from Martin Braun that I > could use the "gr_modtool makexml" command to generate this. Unfortunately > it seems that I don't understand how to use it: > ------------------------ > gr_specest_jared$ ls > apps AUTHORS build cmake CMakeLists.txt COPYING docs examples grc > include lib python README swig > gr_specest_jared$ gr_modtool makexml moving_average_vff > GNU Radio module name identified: specest > Warning: This is an experimental feature. Don't expect any magic. > Searching for matching files in lib/: > None found. > ------------------------- > There is a file called moving_average_vff.cc in the lib directory, so I > guess something more is needed here which I don't know about. > > I tried looking at the page > http://gnuradio.org/redmine/projects/gnuradio/wiki/OutOfTreeModules?version=16#Making-your-blocks-available-in-GRCwhere > there are links to example xml blocks to understand a bit more, but > it seems these links are broken. Also the link to the gr_block > documentation in the next section (There's more:...) is broken. > > I'm grateful for any hints on how to make the block moving_average_vff > visible in the GRC. > > Best regards, > Eskil > > > 2013/10/4 Jared Clements <jared.cleme...@gmail.com> > >> I updated gr-specest so it would compile with 3.7, see my repo on >> www.github.com/dfxx if you want to try that route. The changes were >> almost all namespace stuff and cmake stuff, i.e. I don't think I broke >> anything. >> >> Jared >> On Oct 4, 2013 7:33 AM, "Eskil Varenius" <eskil.varen...@gmail.com> >> wrote: >> >>> Hi everyone, >>> After a long break since June I am now back learning about Gnuradio. I >>> asked in June for a way to average vectors elementwise and Martin Braun >>> suggested the moving_average_Vff block in the gr-specest. He also said it >>> would be available PyBOMBS. Now update: >>> >>> Since I had installed Gnuradio using the build-script I wanted to >>> re-install it using pybombs. I uninstalled the old gnuradio by doing a >>> "sudo make uninstall" in each build directory for the old release. Seems to >>> work. Now I installed gnuradio 3.6 (since gr-specest is still only verified >>> for 3.6, although I'm happy to see people working towards a 3.7 release). I >>> did the install using the instructions on the pybombs quickstart page: >>> >>> git clone git://github.com/pybombs/pybombs >>> cd pybombs >>> git checkout gr-3.6 >>> ./pybombs install gnuradio >>> >>> Gnuradio seemed to install without problems but: I realised I had >>> path-problems since I could not start anything (gnuradio companion, import >>> gnuradio etc. fails). Perhaps this was related to me using a custom target >>> directory (/opt/gnuradio_pybombs). I looked around and found path >>> instructions for custom directory installs at " >>> http://gnuradio.org/redmine/projects/gnuradio/wiki/UbuntuInstall#Installing-in-a-custom-directory";, >>> i.e. put the following in my .bashrc: >>> >>> # GNU Radio installation >>> export PATH=$PATH:/opt/gnuradio_pybombs/bin >>> export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/opt/gnuradio_pybombs/lib >>> export >>> PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/opt/gnuradio_pybombs/lib/pkgconfig >>> export >>> PYTHONPATH=$PYTHONPATH:/opt/gnuradio_pybombs/lib/python2.6/site-packages >>> >>> However, that didn't work completely - I still could not find the >>> gnuradio python module. I realised two things: the 2.6 should probably be >>> 2.7 for me, and also the pythonpath should end in dist-packages, not >>> site-packages, since the site-packages folder was empty. After modifying >>> the pythonpath with 2.7 and dist-packages everything runs, I can import >>> gnuradio and also use gnuradio companion. So far so good! >>> >>> Now for gr-specest. I tried to install it using app store (cool stuff, >>> you guys are amazing!) and also just command line which is equivalent, i.e. >>> I run using "sudo ./pybombs install gr-specest" I get a lot of output, but >>> the perhaps most interesting one before it ends abruptly is: >>> -- checking for module 'gruel' >>> -- package 'gruel' not found >>> -- Could NOT find GRUEL (missing: GRUEL_LIBRARIES GRUEL_INCLUDE_DIRS) >>> -- checking for module 'gnuradio-core' >>> -- package 'gnuradio-core' not found >>> -- Could NOT find GNURADIO_CORE (missing: GNURADIO_CORE_LIBRARIES >>> GNURADIO_CORE_INCLUDE_DIRS) >>> CMake Error at CMakeLists.txt:100 (message): >>> Gruel required to compile specest >>> >>> I am lost here. Any ideas? I can give the rest of the output as well, >>> but this is the showstopper as far as I can see. I have tried googling >>> this, but it seems to me that the solution used is to use the >>> build-gnuradio script instead of PyBOMBS. I could do that, but then I would >>> not be able to enjoy installing gr-specest through the app-store ;). >>> Grateful for any advice. >>> >>> Cheers, >>> Eskil >>> >>> >>> 2013/6/24 Martin Braun (CEL) <martin.br...@kit.edu> >>> >>>> On Mon, Jun 24, 2013 at 02:09:51PM +0200, Eskil Varenius wrote: >>>> > The grand plan is as follows: >>>> > 1) Use an USRP to recieve a signal, I know how. >>>> > 2) Divide the stream of samples into vectors, I know how. >>>> > 3) Take the FFT of the vectors one by one, I know how. >>>> > 4) Average the vectors coming from the FFT together element-wise. I >>>> don't know >>>> > how. >>>> > 5) Save the averaged vector to a file, I know how. >>>> > >>>> > What I cannot solve is step 4: I need to take the N vectors (each of >>>> size M) >>>> > coming from the FFT-block and sum them together element-wise to >>>> produce one >>>> > vector of size M. >>>> >>>> The spectral estimation toolbox (gr-specest) has a block to do this >>>> (moving_average_vff). You can get it through PyBOMBS, it is not yet >>>> 3.7-compatible, though. >>>> >>>> https://github.com/kit-cel/gr-specest >>>> >>>> MB >>>> >>>> -- >>>> Karlsruhe Institute of Technology (KIT) >>>> Communications Engineering Lab (CEL) >>>> >>>> Dipl.-Ing. Martin Braun >>>> Research Associate >>>> >>>> Kaiserstraße 12 >>>> Building 05.01 >>>> 76131 Karlsruhe >>>> >>>> Phone: +49 721 608-43790 >>>> Fax: +49 721 608-46071 >>>> www.cel.kit.edu >>>> >>>> KIT -- University of the State of Baden-Württemberg and >>>> National Laboratory of the Helmholtz Association >>>> >>>> _______________________________________________ >>>> Discuss-gnuradio mailing list >>>> Discuss-gnuradio@gnu.org >>>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >>>> >>>> >>> >>> _______________________________________________ >>> Discuss-gnuradio mailing list >>> Discuss-gnuradio@gnu.org >>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >>> >>> >
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