Re: [Discuss-gnuradio] OOT block not showing in GRC

[Kevin McQuiggin]

Hi Logan:

Glad to hear that!  Happy to help.  

My first OOT block was a variant of the “Repeat” block that permitted the repeat factor (the “Interpolation” parameter in the block itself) to be changed on the fly.  I needed that capability for an approach to demodulating AFSK that I have since found a much better way to do...  So I don’t “need” the block myself anymore, but nonetheless it is handy to have around.  

Kevin

On Aug 8, 2015, at 3:56 PM, Washbourne, Logan <address@hidden> wrote:

Kevin,

It worked! I really appreciate your help!!

Ron,

So that install prefix should be pointing to where I installed gnuradio?

(Never can know too many ways to skin a cat-metaphorically)

Logan Washbourne

Electrical Engineering Graduate Student

(Electromagnetics)

On Sat, Aug 8, 2015 at 5:43 PM, Kevin McQuiggin <address@hidden> wrote:

Hi Logan:

I just went through the same process!  My new OOT block wasn't being found.  The solution is to add a [grc] segment to the config.conf file in ~/.gnuradio:

I had to create the .gnuradio directory, then add the simple two-line [grc] stanza to a new config.conf file:

[grc]
local_blocks_path=/usr/local/share/gnuradio/grc/blocks

This tells grc to look for additional blocks in the stated directory.  So you would do something like:

cd
mkdir .gnuradio
cd .gnuradio
vi config.conf

Then add the two lines above, your OOT block install path may be different so I'd check it first.

Hope this helps,

Kevin

> On Aug 8, 2015, at 3:33 PM, Washbourne, Logan <address@hidden> wrote:
>
> Hello all,
>
> I am trying to create a simple OOT block. Eventually I would like to create a block that lets a transmitting agent know if their message was received or not, but for now I am just trying to create a block that multiplies the input values by 2 (very similar to the guided tutorial example of the square_ff block).
>
> So the problem is that when I follow all of the instructions no errors appear but when I open up the GRC, my module and blocks are not there.
>
> So hopefully no one minds if I explain how I have installed Gnuradio on my machine and the process of creating the OOT module, in hopes someone might find where I made an error.
>
> I have already gotten previous help and responses on here that really did help me out so I'd like to say again, thank you to the community.
>
> Ok, so I used Pybombs to install Gnuradio.
>
> /home/username/Thesis/pybombs is where I installed pybombs.
>
> Before installing gnuradio I changed the permissions to the path of /opt/gnuradio/pybombs by using: sudo chown username:mygroupname /opt/gnuradio/pybombs (thanks to Nathan West)
>
> I then used ./pybombs install gnuradio.
>
> I changed the install prefix to /opt/gnuradio/pybombs
>
> Then I used ./pybobms env
> source /opt/gnuradio/pybombs/setup_env.sh (sometimes I have to rerun this to get the GRC to open, not sure what I'm doing to undo this command)
>
> Then I created the folder, /home/username/Thesis/OOT
>
> I then used gr_modtool newmod ACK
>
> Then /home/username/Thesis/OOT/gr-ACK gr_modtool add -t general check
>
> altered the QA file
> rewrote the check_impl.cc file
>
> Created the build folder(/home/username/Thesis/OOT/gr-ACK/build
>
> ran cmake ../
> ran make
> ran make test
>
> Everything passed(after some debugging, array indices start at 0 btw)
>
> I then ran gr_modtool makexml check in the gr-ACK folder
>
> Then cd build
>
> sudo make install
> sudo ldconfig
>
> gnuradio-companion
>
> And I can't find my module or block.
>
> I have a feeling that I'm still installing gnuradio or my OOT blocks in the wrong places, but I'm not sure how to remedy it.
>
> *********check_impl.cc***********
>
> #ifdef HAVE_CONFIG_H
> #include "config.h"
> #endif
>
> #include <gnuradio/io_signature.h>
> #include "check_impl.h"
>
> namespace gr {
>   namespace ACK {
>
>     check::sptr
>     check::make()
>     {
>       return gnuradio::get_initial_sptr
>         (new check_impl());
>     }
>
>     /*
>      * The private constructor
>      */
>     check_impl::check_impl()
>       : gr::block("check",
>               gr::io_signature::make(1,1, sizeof (float)),
>               gr::io_signature::make(1,1, sizeof (float)))
>     {}
>
>     /*
>      * Our virtual destructor.
>      */
>     check_impl::~check_impl()
>     {
>     }
>
>     void
>     check_impl::forecast (int noutput_items, gr_vector_int &ninput_items_required)
>     {
>         ninput_items_required[0] = noutput_items;
>     }
>
>     int
>     check_impl::general_work (int noutput_items,
>                        gr_vector_int &ninput_items,
>                        gr_vector_const_void_star &input_items,
>                        gr_vector_void_star &output_items)
>     {
>         const float *in = (const float *) input_items[0];
>         float *out = (float *) output_items[0];
>
>         // Do <+signal processing+>
>         // Tell runtime system how many input items we consumed on
>         // each input stream.
>
>     for(int i = 0; i < noutput_items ;i++)
>     {
>         out[i] = in[i] * 2;
>     }
>
>
>         consume_each (noutput_items);
>
>         // Tell runtime system how many output items we produced.
>         return noutput_items;
>     }
>
>   } /* namespace ACK */
> } /* namespace gr */
>
>
> ***********qa_check.py**********************
>
> #!/usr/bin/env python
>
>
> from gnuradio import gr, gr_unittest
> from gnuradio import blocks
> import ACK_swig as ACK
>
> class qa_check (gr_unittest.TestCase):
>
>     def setUp (self):
>         self.tb = gr.top_block ()
>
>     def tearDown (self):
>         self.tb = None
>
>     def test_001_check (self):
>
>     src_data = (3, 4, 5.5, 2, 3)
>     expected_result = (6, 8, 11, 4, 6)
>     src = "" class=""> >     sqr = ACK.check()
>     dst = blocks.vector_sink_f()
>     self.tb.connect(src,sqr)
>     self.tb.connect(sqr,dst)
>     self.tb.run()
>     result_data = dst.data()
>     self.assertFloatTuplesAlmostEqual(expected_result,result_data,6)
>
>
>
>
>
>
> if __name__ == '__main__':
>     gr_unittest.run(qa_check, "qa_check.xml")
>
>
>
>
> I really appreciate all of your time,
>
> Logan Washbourne
> Electrical Engineering Graduate Student
> (Electromagnetics)
>

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