Forum: GNU Radio WX GUIs using FFTs not working

Hi,

After building gnu-radio v3.6.3-35 with the build-gnuradio script the
WX GUIs that use FFTs do not work (waterfall sink, fft sink),
reporting "gri_fftw: can't import wisdom from $HOME/.gr_fftw_wisdom".
That file does exist, has the right permissions (664) and contains
fftwf_wisdom information.

Non-fft WX GUI sinks like scope and histo sink do work when using a
throttled noise source as input (all created through grc).

I have a fftw3 compiled and installed in /usr/local and the
build-gnuradio script installed the libraries and header files in
/usr; not sure if this is part of the problem.

Before this issue there were problems with wx; failing the 'import wx'
on anything that used wx. It appeared I had both python-wxgtk2.6 and
python-wxgtk2.8 installed. After removing both and installing
python-wxgtk2.8 that problem went away, but may have caused the FFT
problem.

Regards,
    C. Bassa

On 02/02/13 02:34 PM, C. Bassa wrote:
>
> Regards,
>     C. Bassa
>
> _______________________________________________
> Discuss-gnuradio mailing list
> Discuss-gnuradio@gnu.org
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>
>
Just remove your .gr_fftw_wisdom file, it's probably got trash in it.

What Linux distrib are you using?



--
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org

Hi Marcus,

On Sat, Feb 2, 2013 at 7:38 PM, Marcus D. Leech <mleech@ripnet.com> 
wrote:
> Just remove your .gr_fftw_wisdom file, it's probably got trash in it.

I tried this; the error message disappears but the program seg faults.
No new .gr_fftw_wisdom file is created.

> What Linux distrib are you using?

XUbuntu 12.04.

Regards,
     Cees

On 02/02/13 02:43 PM, C. Bassa wrote:
> Hi Marcus,
>
> On Sat, Feb 2, 2013 at 7:38 PM, Marcus D. Leech <mleech@ripnet.com> wrote:
>> Just remove your .gr_fftw_wisdom file, it's probably got trash in it.
> I tried this; the error message disappears but the program seg faults.
> No new .gr_fftw_wisdom file is created.
>
My suspicion is a conflict between the installed-from-package FFTW
(which build-gnuradio will install if it isn't there),
 and your installed-from-source FFTW.

Unless you've done something pathological in your .grc file that's
provoking a bug in the FFT implementation.

Can you post your .grc file?

--
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org

Hi Marcus,

On Sat, Feb 2, 2013 at 8:02 PM, Marcus D. Leech <mleech@ripnet.com> 
wrote:
> Can you post your .grc file?

See below. In the companion I've hooked up a gaussian noise source
through a throttle to a WX GUI FFT. If I change the GUI FFT for the
scope it works fine, hence my suspicion is has to do with either FFTW
or WX.

Regards,
     Cees

------------
<?xml version='1.0' encoding='ASCII'?>
<flow_graph>
  <timestamp>Sat Feb  2 19:27:57 2013</timestamp>
  <block>
    <key>options</key>
    <param>
      <key>id</key>
      <value>top_block</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>title</key>
      <value></value>
    </param>
    <param>
      <key>author</key>
      <value></value>
    </param>
    <param>
      <key>description</key>
      <value></value>
    </param>
    <param>
      <key>window_size</key>
      <value>1280, 1024</value>
    </param>
    <param>
      <key>generate_options</key>
      <value>wx_gui</value>
    </param>
    <param>
      <key>category</key>
      <value>Custom</value>
    </param>
    <param>
      <key>run_options</key>
      <value>prompt</value>
    </param>
    <param>
      <key>run</key>
      <value>True</value>
    </param>
    <param>
      <key>max_nouts</key>
      <value>0</value>
    </param>
    <param>
      <key>realtime_scheduling</key>
      <value></value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(10, 10)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>variable</key>
    <param>
      <key>id</key>
      <value>samp_rate</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>value</key>
      <value>32000</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(10, 170)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>gr_throttle</key>
    <param>
      <key>id</key>
      <value>gr_throttle_0</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>type</key>
      <value>complex</value>
    </param>
    <param>
      <key>samples_per_second</key>
      <value>samp_rate</value>
    </param>
    <param>
      <key>vlen</key>
      <value>1</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(476, 31)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>wxgui_fftsink2</key>
    <param>
      <key>id</key>
      <value>wxgui_fftsink2_0</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>type</key>
      <value>complex</value>
    </param>
    <param>
      <key>title</key>
      <value>FFT Plot</value>
    </param>
    <param>
      <key>samp_rate</key>
      <value>samp_rate</value>
    </param>
    <param>
      <key>baseband_freq</key>
      <value>0</value>
    </param>
    <param>
      <key>y_per_div</key>
      <value>10</value>
    </param>
    <param>
      <key>y_divs</key>
      <value>10</value>
    </param>
    <param>
      <key>ref_level</key>
      <value>0</value>
    </param>
    <param>
      <key>ref_scale</key>
      <value>2.0</value>
    </param>
    <param>
      <key>fft_size</key>
      <value>1024</value>
    </param>
    <param>
      <key>fft_rate</key>
      <value>15</value>
    </param>
    <param>
      <key>peak_hold</key>
      <value>False</value>
    </param>
    <param>
      <key>average</key>
      <value>False</value>
    </param>
    <param>
      <key>avg_alpha</key>
      <value>0</value>
    </param>
    <param>
      <key>win</key>
      <value>None</value>
    </param>
    <param>
      <key>win_size</key>
      <value></value>
    </param>
    <param>
      <key>grid_pos</key>
      <value></value>
    </param>
    <param>
      <key>notebook</key>
      <value></value>
    </param>
    <param>
      <key>freqvar</key>
      <value>None</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(810, 149)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>analog_noise_source_x</key>
    <param>
      <key>id</key>
      <value>analog_noise_source_x_0</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>type</key>
      <value>complex</value>
    </param>
    <param>
      <key>noise_type</key>
      <value>analog.GR_GAUSSIAN</value>
    </param>
    <param>
      <key>amp</key>
      <value>1</value>
    </param>
    <param>
      <key>seed</key>
      <value>0</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(256, 14)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <connection>
    <source_block_id>analog_noise_source_x_0</source_block_id>
    <sink_block_id>gr_throttle_0</sink_block_id>
    <source_key>0</source_key>
    <sink_key>0</sink_key>
  </connection>
  <connection>
    <source_block_id>gr_throttle_0</source_block_id>
    <sink_block_id>wxgui_fftsink2_0</sink_block_id>
    <source_key>0</source_key>
    <sink_key>0</sink_key>
  </connection>
</flow_graph>

i am still face problem for making simple block in gnuradio
 i am using gr_modtool
i follow the steps
1- creating the module ( named ramadan)
2 adding the block(mm)
i have 2 files in lib (mm_imp.cc, mm_imp.hh) and one file in include  
(mm.h)
i made changes in the 3 files like square example in tutorial, but while 
building i face problem in make appears for me

el-hadidy@ubuntu:~/gr-ramadan/build$ make
Scanning dependencies of target gnuradio-ramadan
[  5%] Building CXX object 
lib/CMakeFiles/gnuradio-ramadan.dir/mm_impl.cc.o
/home/el-hadidy/gr-ramadan/lib/mm_impl.cc:32:29: error: 
howto_square_ff.h: No such file or directory
/home/el-hadidy/gr-ramadan/lib/mm_impl.cc:39: error: 
‘howto_square_ff_sptr’ does not name a type
/home/el-hadidy/gr-ramadan/lib/mm_impl.cc:62: error: ‘howto_square_ff’ 
has not been declared
/home/el-hadidy/gr-ramadan/lib/mm_impl.cc:62: error: ISO C++ forbids 
declaration of ‘howto_square_ff’ with no type
/home/el-hadidy/gr-ramadan/lib/mm_impl.cc: In function ‘int 
howto_square_ff()’:
/home/el-hadidy/gr-ramadan/lib/mm_impl.cc:63: error: only constructors 
take base initializers
/home/el-hadidy/gr-ramadan/lib/mm_impl.cc: At global scope:
/home/el-hadidy/gr-ramadan/lib/mm_impl.cc:73: error: expected 
constructor, destructor, or type conversion before ‘::’ token
/home/el-hadidy/gr-ramadan/lib/mm_impl.cc:79: error: ‘howto_square_ff’ 
is not a class or namespace
/home/el-hadidy/gr-ramadan/lib/mm_impl.cc:
 In function ‘int general_work(int, gr_vector_int&,
gr_vector_const_void_star&, gr_vector_void_star&)’:
/home/el-hadidy/gr-ramadan/lib/mm_impl.cc:94: error: ‘consume_each’ was 
not declared in this scope
make[2]: *** [lib/CMakeFiles/gnuradio-ramadan.dir/mm_impl.cc.o] Error 1
make[1]: *** [lib/CMakeFiles/gnuradio-ramadan.dir/all] Error 2
make: *** [all] Error 2
el-hadidy@ubuntu:~/gr-ramadan/build$

so , how can i solve this problem? can any one help me to fix this 
problem as i read more and still face problems. Thanks

On Sun, Feb 3, 2013 at 6:02 AM, Mohammed Ramadan
<eng_mo7med2005@yahoo.com>wrote:

>
> declaration of howto_square_ff with no type
> general_work(int, gr_vector_int&, gr_vector_const_void_star&,
> gr_vector_void_star&):
> /home/el-hadidy/gr-ramadan/lib/mm_impl.cc:94: error: consume_each was
> not declared in this scope
> *make[2]: *** [lib/CMakeFiles/gnuradio-ramadan.dir/mm_impl.cc.o] Error 1
> make[1]: *** [lib/CMakeFiles/gnuradio-ramadan.dir/all] Error 2
> make: *** [all] Error 2*
> el-hadidy@ubuntu:~/gr-ramadan/build$
>
> so , how can i solve this problem? can any one help me to fix this problem
> as i read more and still face problems. Thanks


Again, this looks like a version problem. Except in this case, it looks
like you have a really old version of GNU Radio installed before there 
was
a consume_each (and I can't even remember how far back that was).

Tom

>> (mm.h)
>> /home/el-hadidy/gr-ramadan/lib/mm_impl.cc:39: error:
>> /home/el-hadidy/gr-ramadan/lib/mm_impl.cc: At global scope:
>> not declared in this scope
> Again, this looks like a version problem. Except in this case, it looks
> like you have a really old version of GNU Radio installed before there was
> a consume_each (and I can't even remember how far back that was).
>
> Tom

To me it looks like there are some classname:: missing in the
implementation file, in which case the general_work is defined outside 
the
class and thus undefined (at least that's when I am seeing these 
errors).
Can you check/post your .cc code?

Martin