Analysis_filterbank connect trouble

GNU Radio
1

Hi

Thanks Eric for helping me with the analysis_filterbank and the fact
that all the channels up to the one that I’m interested in should be
connected to something. I do however have another problem now. I
have an app that allows me to pick a channel from a slider. The
slider goes from 1 to 20 (so it’s channels 1 to 19)). This is the
slider’s callback:

def set_channel(self,channel):
self.lock()
self.disconnect_all()

self.connect(self.source_i,(self.conv,0))
self.connect(self.source_q,(self.conv,1))
self.connect(self.conv,self.throttle)
self.connect(self.throttle,self.pfb)
self.connect(self.throttle,self.src_fft)

chan_no = channel-1
if (chan_no == 0):
  self.connect((self.pfb,0),self.final_fft)
else:
  for x in range(0,chan_no):
    self.connect((self.pfb,x),gr.null_sink(gr.sizeof_gr_complex))
    print x
  self.connect((self.pfb,chan_no),self.final_fft)
self.unlock()

self.myform['channel'].set_value(channel)
self.myform['channel_slider'].set_value(channel)

I get the following error when changing the slider value:

Traceback (most recent call last):
File “/usr/local/lib/python2.5/site-packages/gnuradio/wxgui/form.py”,
line 233, in
lambda evt: callback(self._map_out(evt.GetInt())))
File “test_gui.py”, line 100, in set_channel
self.connect((self.pfb,chan_no),self.final_fft)
File
“/usr/local/lib/python2.5/site-packages/gnuradio/gr/top_block.py”,
line 70, in connect
self._connect(points[i-1], points[i])
File
“/usr/local/lib/python2.5/site-packages/gnuradio/gr/top_block.py”,
line 76, in _connect
dst_block.basic_block(), dst_port)
File
“/usr/local/lib/python2.5/site-packages/gnuradio/gr/gnuradio_swig_py_runtime.py”,
line 1493, in connect
return _gnuradio_swig_py_runtime.gr_top_block_sptr_connect(*args)
NotImplementedError: Wrong number of arguments for overloaded function
‘gr_top_block_sptr_connect’.
Possible C/C++ prototypes are:
connect(boost::shared_ptr<gr_top_block > *,gr_basic_block_sptr)
connect(boost::shared_ptr<gr_top_block >
*,gr_basic_block_sptr,int,gr_basic_block_sptr,int)

Where line 100 is this:

self.connect((self.pfb,chan_no),self.final_fft)

Can anyone please help with this?

Thanks a lot.

Sebastiaan

–
Sebastiaan H.
Radar and Remote Sensing Group, University of Cape Town
Tel: +27 83 305 5667

2

Hi

I got my previous problem to work, so no need to respond. I needed to
cast channel to an int.

Thanks for any trouble.

Sebastiaan

On Mon, Jan 12, 2009 at 3:54 PM, Sebastiaan H. [email protected]
wrote:

           self.lock()
                   self.connect((self.pfb,0),self.final_fft)

I get the following error when changing the slider value:
File “/usr/local/lib/python2.5/site-packages/gnuradio/gr/top_block.py”,
*,gr_basic_block_sptr,int,gr_basic_block_sptr,int)

–
Sebastiaan H.
Radar and Remote Sensing Group, University of Cape Town
Tel: +27 83 305 5667

–
Sebastiaan H.
Radar and Remote Sensing Group, University of Cape Town
Tel: +27 83 305 5667