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[Discuss-gnuradio] uspr2 working intermittently/segmentation fault

From: Pham, Thanh
Subject: [Discuss-gnuradio] uspr2 working intermittently/segmentation fault
Date: Wed, 01 Apr 2009 15:00:57 -0600


I am running gnuradio on a Linux x86_64 box, fedora10. I downloaded the code from the development trunk on 2/26/09.  Lately I notice that my uspr2 has been working intermittently.  Sometimes, even running the example code would give me a segmentation fault error or errors like the one listed below.

If I turn the uspr2 off and back on then rerun the program, the program will run again okay. 

Has someone seen this behavior before or had any explanation for why it behaves that way.

Also, is there a command to reboot/reset the uspr2 instead of turning the power off and on?




./usrp2_fft_copy.py      (which is an exact copy of the usrp2_fft.py in the example)

usrp2: failed to enable realtime scheduling

Traceback (most recent call last):

  File "./usrp2_fft_copy.py", line 290, in <module>

    main ()

  File "./usrp2_fft_copy.py", line 286, in main

    app = stdgui2.stdapp(app_top_block, "USRP2 FFT", nstatus=1)

  File "/usr/local/lib64/python2.5/site-packages/gnuradio/wxgui/stdgui2.py", line 36, in __init__

    wx.App.__init__ (self, redirect=False)

  File "/usr/lib64/python2.5/site-packages/wx-2.8-gtk2-unicode/wx/_core.py", line 7935, in __init__


  File "/usr/lib64/python2.5/site-packages/wx-2.8-gtk2-unicode/wx/_core.py", line 7509, in _BootstrapApp

    return _core_.PyApp__BootstrapApp(*args, **kwargs)

  File "/usr/local/lib64/python2.5/site-packages/gnuradio/wxgui/stdgui2.py", line 39, in OnInit

    frame = stdframe (self.top_block_maker, self.title, self._nstatus)

  File "/usr/local/lib64/python2.5/site-packages/gnuradio/wxgui/stdgui2.py", line 60, in __init__

    self.panel = stdpanel (self, self, top_block_maker)

  File "/usr/local/lib64/python2.5/site-packages/gnuradio/wxgui/stdgui2.py", line 81, in __init__

    self.top_block = top_block_maker (frame, self, vbox, sys.argv)

  File "./usrp2_fft_copy.py", line 70, in __init__

    self.u = usrp2.source_32fc(options.interface, options.mac_addr)

  File "/usr/local/lib64/python2.5/site-packages/gnuradio/usrp2.py", line 577, in source_32fc

    return _usrp2.source_32fc(*args, **kwargs)

RuntimeError: Unable to retrieve daughterboard info


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