Re: [Discuss-gnuradio] Problems with USRP

[Krzysztof Kamieniecki]

I think "fftsink.make_fft_sink_c" should be "fftsink.fft_sink_c"

Quoting Anastasopoulos Achilleas <address@hidden>:
> Dear all,
> 
> I received the USRP, followed the WiKi instruction and
> it seems to be working since I get meaningful result when I run
> test_usrp_standard_tx and test_usrp_standard_rx.
> 
> I have also updated my gnuradio installation using
> tarballs 2.5
> 
> However I have problems running any of the python
> scripts on gnuradio-examples that involve the USRP.
> 
> I have sanitized one of the scripts and it works fine when I
> comment out the
> from gnuradio import usrp
> line
> but it gives an error otherwise.
> 
> I attach the simple script and error message.
> 
> Any idea as to what might be wrong?
> 
> Thanks
> Achilleas
> 
> 
> ===================================================
> #!/usr/bin/env python
> 
> from gnuradio import gr
> 
> from gnuradio.wxgui import stdgui, fftsink
> import wx
> 
> #from gnuradio import usrp
> 
> class nbfm_rx_graph (stdgui.gui_flow_graph):
>     def __init__(self,frame,panel,vbox,argv):
>         stdgui.gui_flow_graph.__init__ (self,frame,panel,vbox,argv)
> 
>         src = gr.sig_source_c (256e3, gr.GR_SIN_WAVE, 20e3, 1e1)
> 
>         usrp_fft, fft_win1 = \
>                   fftsink.make_fft_sink_c (self, panel, "USRP Output",
> 512,
>                                            256e3, 0, 100)
>         self.connect (src, usrp_fft)
>         vbox.Add (fft_win1, 1, wx.EXPAND)
> 
> def main():
>     app = stdgui.stdapp (nbfm_rx_graph, "NBFM RX")
>     app.MainLoop ()
> 
> if __name__ == '__main__':
>     main()
> 
> ===================================================
> 
> Traceback (most recent call last):
>   File "./test2.py", line 29, in ?
>     main()
>   File "./test2.py", line 25, in main
>     app = stdgui.stdapp (nbfm_rx_graph, "NBFM RX")
>   File "/usr/local/lib/python2.3/site-packages/gnuradio/wxgui/stdgui.py",
> line 35, in __init__
>     wx.App.__init__ (self)
>   File "/usr/lib/python2.3/site-packages/wx-2.5.3-gtk-ansi/wx/_core.py",
> line 5301, in __init__
>     self._BootstrapApp()
>   File "/usr/lib/python2.3/site-packages/wx-2.5.3-gtk-ansi/wx/_core.py",
> line 4980, in _BootstrapApp
>     return _core_.PyApp__BootstrapApp(*args, **kwargs)
>   File "/usr/local/lib/python2.3/site-packages/gnuradio/wxgui/stdgui.py",
> line 38, in OnInit
>     frame = stdframe (self.flow_graph_maker, self.title)
>   File "/usr/local/lib/python2.3/site-packages/gnuradio/wxgui/stdgui.py",
> line 59, in __init__
>     self.panel = stdpanel (self, self, flow_graph_maker)
>   File "/usr/local/lib/python2.3/site-packages/gnuradio/wxgui/stdgui.py",
> line 85, in __init__
>     self.fg.start ()
>   File "/usr/local/lib/python2.3/site-packages/gnuradio/gr/flow_graph.py",
> line 73, in start
>     self.scheduler = scheduler (self)
>   File "/usr/local/lib/python2.3/site-packages/gnuradio/gr/scheduler.py",
> line 49, in __init__
>     sts = single_threaded_scheduler (list_of_blocks)
>   File
> "/usr/local/lib/python2.3/site-packages/gnuradio/gr/gnuradio_swig_python.py",
> line 1484, in single_threaded_scheduler
>     return _gnuradio_swig_python.single_threaded_scheduler(*args)
> TypeError: argument number 1: a 'gr_block_sptr' is expected,
> 'gr_block_sptrPtr(<gr_block sig_source_c (0)>)' is received in sequence
> element 0
> 
> =================================================
> 
> 
> 
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