Re: [Discuss-gnuradio] UHD Error

Follow the instructions in section "Setup Udev for USB (Linux)" at the following URL for you to be able to access your USRP1 with non-root permissions:

http://files.ettus.com/uhd_docs/manual/html/transport.html#setup-udev-for-usb-linux

An easy way to locate the 'uhd-usrp.rules' file is to run the following:

sudo find / -name uhd-usrp.rules

Mike

--
Mike Jameson M0MIK BSc MIET
Ettus Research Technical Support
Email: support@ettus.com
Web: http://ettus.com

On Sat, Jun 28, 2014 at 5:39 AM, Nguyễn Văn Lý <lynguyenvan.uet@gmail.com> wrote:

Dear all,

I am new to gnuradio. I am trying to run an experiment, but I got an error as follows:

UHD Error:
    USB open failed: insufficient permissions.
    See the application notes for your device.
Traceback (most recent call last):
  File "/home/van-ly/GNU_Radio/SDR Implementation of OFDM-based Network Coding_Project Codes and Files/ofdm_transmitter.py", line 198, in <module>
    tb = ofdm_transmitter()
  File "/home/van-ly/GNU_Radio/SDR Implementation of OFDM-based Network Coding_Project Codes and Files/ofdm_transmitter.py", line 67, in __init__
    channels=range(1),
  File "/usr/local/lib/python2.7/dist-packages/gnuradio/uhd/__init__.py", line 121, in constructor_interceptor
    return old_constructor(*args)
  File "/usr/local/lib/python2.7/dist-packages/gnuradio/uhd/uhd_swig.py", line 2208, in make
    return _uhd_swig.usrp_sink_make(*args)
RuntimeError: LookupError: KeyError: No devices found for ----->
Empty Device Address

Then I tried a command (sudo uhd_usrp_probe) to test the UHD installation and I got

linux; GNU C++ version 4.8.1; Boost_104800; UHD_003.005.004-0-unknown

-- Loading firmware image: /usr/local/share/uhd/images/usrp1_fw.ihx... done
-- Opening a USRP1 device...
-- Loading FPGA image: /usr/local/share/uhd/images/usrp1_fpga.rbf... done
-- Using FPGA clock rate of 64.000000MHz...
  _____________________________________________________
 /
|       Device: USRP1 Device
|     _____________________________________________________
|    /
|   |       Mboard: USRP1
|   |   serial: 6R2706U1
|   |  
|   |   Time sources: none
|   |   Clock sources: internal
|   |   Sensors:
|   |     _____________________________________________________
|   |    /
|   |   |       RX DSP: 0
|   |   |   Freq range: -32.000 to 32.000 Mhz
|   |     _____________________________________________________
|   |    /
|   |   |       RX DSP: 1
|   |   |   Freq range: -32.000 to 32.000 Mhz
|   |     _____________________________________________________
|   |    /
|   |   |       RX Dboard: A
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       RX Frontend: 0
|   |   |   |   Name: Unknown (0xffff) - 0
|   |   |   |   Antennas:
|   |   |   |   Sensors:
|   |   |   |   Freq range: 0.000 to 0.000 Mhz
|   |   |   |   Gain Elements: None
|   |   |   |   Connection Type: IQ
|   |   |   |   Uses LO offset: No
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       RX Codec: A
|   |   |   |   Name: ad9522
|   |   |   |   Gain range pga: 0.0 to 20.0 step 1.0 dB
|   |     _____________________________________________________
|   |    /
|   |   |       RX Dboard: B
|   |   |   ID: RFX2400 (0x0027)
|   |   |   Serial: E5R12YBR2
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       RX Frontend: 0
|   |   |   |   Name: RFX2400 RX
|   |   |   |   Antennas: TX/RX, RX2, CAL
|   |   |   |   Sensors: lo_locked
|   |   |   |   Freq range: 2300.000 to 2900.000 Mhz
|   |   |   |   Gain range PGA0: 0.0 to 70.0 step 0.0 dB
|   |   |   |   Connection Type: QI
|   |   |   |   Uses LO offset: No
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       RX Codec: B
|   |   |   |   Name: ad9522
|   |   |   |   Gain range pga: 0.0 to 20.0 step 1.0 dB
|   |     _____________________________________________________
|   |    /
|   |   |       TX DSP: 0
|   |   |   Freq range: -44.000 to 44.000 Mhz
|   |     _____________________________________________________
|   |    /
|   |   |       TX DSP: 1
|   |   |   Freq range: -44.000 to 44.000 Mhz
|   |     _____________________________________________________
|   |    /
|   |   |       TX Dboard: A
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       TX Frontend: 0
|   |   |   |   Name: Unknown (0xffff) - 0
|   |   |   |   Antennas:
|   |   |   |   Sensors:
|   |   |   |   Freq range: 0.000 to 0.000 Mhz
|   |   |   |   Gain Elements: None
|   |   |   |   Connection Type: IQ
|   |   |   |   Uses LO offset: No
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       TX Codec: A
|   |   |   |   Name: ad9522
|   |   |   |   Gain range pga: -20.0 to 0.0 step 0.1 dB
|   |     _____________________________________________________
|   |    /
|   |   |       TX Dboard: B
|   |   |   ID: RFX2400 (0x002b)
|   |   |   Serial: E5R12YBR2
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       TX Frontend: 0
|   |   |   |   Name: RFX2400 TX
|   |   |   |   Antennas: TX/RX, CAL
|   |   |   |   Sensors: lo_locked
|   |   |   |   Freq range: 2300.000 to 2900.000 Mhz
|   |   |   |   Gain Elements: None
|   |   |   |   Connection Type: IQ
|   |   |   |   Uses LO offset: Yes
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       TX Codec: B
|   |   |   |   Name: ad9522
|   |   |   |   Gain range pga: -20.0 to 0.0 step 0.1 dB

Can anyone tell me why so? and help me how to fix this error.

Thanks in advance

Van-Ly

Nguyen Van-Ly,  

Vietnam National University, Hanoi - VNU  

University of Engineering and Technology - UET      

Faculty of Electronics and Telecommunications - FET         

Tel: +84 978 819 406

Standing on my own two feet !!!

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