Re: [Discuss-gnuradio] Add parameters to a C++ function

[Josh Blum]

On 11/08/2010 12:46 AM, Daniel Dekst wrote:
> Hi, all,
>
> I want to get the subcarrier SNR averaged across the whole packet. So
> I want to trigger the calculation in gr_ofdm_frame_acquisition.cc
> from gr_ofdm_frame_sink.cc where the packet header is examined to be
> correct or not.
>
> To achieve this, I add one parameter to the construction of
> gr_ofdm_frame_sink, a pointer pointing to the instance of
> gr_ofdm_frame_acquistion so that I can access functions in the
> gr_ofdm_frame_acquisition.
>
> However, I got error File
> "/usr/local/lib/python2.6/dist-packages/gnuradio/gr/gnuradio_swig_py_general.py",
> line 7039, in ofdm_frame_sink return
> _gnuradio_swig_py_general.ofdm_frame_sink(*args, **kwargs) TypeError:
> ofdm_frame_sink() takes at most 8 arguments (9 given)
>
> I have changed the gr_ofdm_frame_sink.cc/h to be able to hold 9
> arguments. Why does _gnuradio_swig_py_general still report it can
> only take 8 arguments? What should I modify?

Find the swig .i file for this block and see if there is a function 
signature that needs to be changed. Many of the swig files have copies 
of the header files so you need to make changes in both places. If thats 
not the case, its probably just an issue of rebuilding and installing 
the part of the build tree with the ofdm swig wrapper stuff.

-josh