Re: [Discuss-gnuradio] Empty Device Address - EzTV 668

On 22/07/12 10:54 PM, David Brush wrote:

Hello,

I am trying to get GNU Radio up and running, I am am experiencing an error that I haven't been able to fix. It seems that uhd cannot find my EzTV 668 usb dongle. rtl_test, however, lists it correctly. When I try to run uhd_fft, I get a traceback and an error that says "No device found for ----> Empty device address." I used the most recent version of build-gnuradio to install all of the components, and have an up to date Ubuntu 12.04 x86_64 distribution. I have also made sure that udev was configured per http://files.ettus.com/uhd_docs/manual/html/transport.html#usb-transport-libusb. I have attached the outputs I get from lsusb, rtl_test, uhd_fft, and uhd_find_devices. Please help!

I can provide additional info as needed.

Thank you!

-David

$ lsusb

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

Bus 001 Device 003: ID 0bda:0158 Realtek Semiconductor Corp. USB 2.0 multicard reader

Bus 001 Device 004: ID 05ca:180a Ricoh Co., Ltd 

Bus 003 Device 007: ID 413c:8160 Dell Computer Corp. Wireless 365 Bluetooth

Bus 003 Device 002: ID 0a5c:4500 Broadcom Corp. BCM2046B1 USB 2.0 Hub (part of BCM2046 Bluetooth)

Bus 003 Device 003: ID 413c:8161 Dell Computer Corp. Integrated Keyboard

Bus 003 Device 004: ID 413c:8162 Dell Computer Corp. Integrated Touchpad [Synaptics]

Bus 002 Device 008: ID 0bda:2838 Realtek Semiconductor Corp. 

$ 

$ 

$ 

$ rtl_test

Found 1 device(s):

  0:  ezcap USB 2.0 DVB-T/DAB/FM dongle

Using device 0: ezcap USB 2.0 DVB-T/DAB/FM dongle

Found Elonics E4000 tuner

Supported gain values (18): -1.0 1.5 4.0 6.5 9.0 11.5 14.0 16.5 19.0 21.5 24.0 29.0 34.0 42.0 43.0 45.0 47.0 49.0 

Reading samples in async mode...

^CSignal caught, exiting!

User cancel, exiting...

$ uhd_find_devices

linux; GNU C++ version 4.6.3; Boost_104601; UHD_003.004.002-181-g25649781

No UHD Devices Found

$ uhd_fft

linux; GNU C++ version 4.6.3; Boost_104601; UHD_003.004.002-181-g25649781

Traceback (most recent call last):

  File "/usr/local/bin/uhd_fft", line 337, in <module>

    main ()

  File "/usr/local/bin/uhd_fft", line 333, in main

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

  File "/usr/local/lib/python2.7/dist-packages/gnuradio/wxgui/stdgui2.py", line 38, in __init__

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

  File "/usr/lib/python2.7/dist-packages/wx-2.8-gtk2-unicode/wx/_core.py", line 7981, in __init__

    self._BootstrapApp()

  File "/usr/lib/python2.7/dist-packages/wx-2.8-gtk2-unicode/wx/_core.py", line 7555, in _BootstrapApp

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

  File "/usr/local/lib/python2.7/dist-packages/gnuradio/wxgui/stdgui2.py", line 42, in OnInit

    self._max_noutput_items)

  File "/usr/local/lib/python2.7/dist-packages/gnuradio/wxgui/stdgui2.py", line 64, in __init__

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

  File "/usr/local/lib/python2.7/dist-packages/gnuradio/wxgui/stdgui2.py", line 86, in __init__

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

  File "/usr/local/bin/uhd_fft", line 91, in __init__

    otw_format=options.wire_format, args=options.stream_args))

  File "/usr/local/lib/python2.7/dist-packages/gnuradio/uhd/__init__.py", line 116, in constructor_interceptor

    return old_constructor(*args)

  File "/usr/local/lib/python2.7/dist-packages/gnuradio/uhd/uhd_swig.py", line 2726, in usrp_source

    return _uhd_swig.usrp_source(*args)

RuntimeError: LookupError: KeyError: No devices found for ----->

Empty Device Address

$ 

Thanks again!

  
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UHD devices are those manufactured by Ettus Research (the USRP family), and have *nothing* to do with
  RTLSDR dongles at all.

build-gnuradio installs both gr-osmosdr, and rtl-sdr components, and I think they include a simple test app,
 other than rtl_test--osmosdr_source_1rtl.grc  appears to be a simple test app for gr-osmosdr-type devices,
  including RTLSDR devices.

Now, confusingly enough, the gr-osmosdr *source* object for Gnu Radio acts a kind of quasi-universal
  abstraction layer for SDR-like hardware, so you can use that source for RTLSDR, OSMOSDR, FunCube, and
  UHD-type devices.  Until the (very recent) advent of gr-osmosdr, there wasn't any hardware-independant
  device abstraction for Gnu Radio, although UHD provides a universal abstraction for USRP devices, there
  was nothing that was cross-manufacturer.  With gr-osmosdr, you can write an RX flow-graph that doesn't
  really "know" very much about the hardware involved.

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