Re: [Discuss-gnuradio] Custom Block Issue

[Josh Blum]

On 07/27/2012 02:01 PM, Jonathan Fox wrote:
> I am trying to create a custom block that does energy detection. I used the
> gr-modtool.py to generate the appropriate directory and files and added my
> algorithm and necessary code to the header and cc. I also added the XML
> file for the GRC It compiled without error but when I tried testing it out,
> I got this error:
> 
> linux; GNU C++ version 4.6.3; Boost_104601; UHD_003.004.002-181-g25649781
> 
> Traceback (most recent call last):
>   File "/home/jonfox/spectrum_sensing_test.py", line 21, in <module>
>     import specsense
>   File "/usr/local/lib/python2.7/dist-packages/specsense/__init__.py", line
> 45, in <module>
>     from specsense_swig import *
>   File
> "/usr/local/lib/python2.7/dist-packages/specsense/specsense_swig.py", line
> 26, in <module>
>     _specsense_swig = swig_import_helper()
>   File
> "/usr/local/lib/python2.7/dist-packages/specsense/specsense_swig.py", line
> 22, in swig_import_helper
>     _mod = imp.load_module('_specsense_swig', fp, pathname, description)
> ImportError: libgnuradio-specsense.so: cannot open shared object file: No
> such file or directory
> 

First off, does the file really exist, if not is it installed, but under
the wrong name or wrong directory?

If its there, sometimes running sudo ldconfig fixes issues like this.

> specsense is the module I created with the modtool but I did not modify the
> swig file. Any ideas on what I did wrong here?
> 
> Also, it seems that my code for having a vector input does not hold up and
> I have to manually change the input type in the appropriate python script
> despite setting it in GRC already. Is there any documentation on adding
> vector inputs and outputs?
> 

any code snippets with the problem that you can post?
-josh