Re: [Discuss-gnuradio] Re: change variables in the FFT Plot the 2.

[Josh Blum]

feldmaus wrote:
> Josh Blum <josh <at> joshknows.com> writes:
>
> > Using GRC, I just tested changing the sample rate of the fftsink. I 
> > tested this for the gl and non gl version. The x-axis markers move and 
> > change correctly when I move the slider for sample rate. The 
> > flowgraph.grc is attached.
> >
> > I do not understand why you have the problem? Do you have the latest 
> > gnuradio trunk installed? http://gnuradio.org/svn/gnuradio/trunk
> I have the SVN Version 2009-Jan-28.

Aha, I believe that I added the set_sample_rate callback recently 
(possibly in February). svn up!

> Further on everytimen i open my *.grc file, the <grc> deletes the manually
> inserted class-method,
> <set_sample_rate>
> so there must be a Problem.

When you generate or run a flow graph in grc, the generated flow graph 
is always overwritten.


> > Also, I am concerned that the gl fftsink aborted/segfaulted. Can you run 
> > the flow graph in gdb and send the traceback?
> Yes i will try this and post the message here.
>
> Another important Point,
> Is there a possibility to save my manually inserted python commands
> in the <top_block.py> file without loosing this by the next
> start of <grc> ?

Nope, too complicated!

If you want to change things: the best way is to manipulate the xml 
block wrappers or make your own custom wrappers:

http://gnuradio.org/trac/wiki/GNURadioCompanion#AddingCustomBlocks

And here is fftsink:

http://gnuradio.org/trac/browser/gnuradio/trunk/grc/data/platforms/python/blocks/wxgui_fftsink2.xml

> Regards Markus
>
>
>
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