[USRP-users] My b210 uhd crashes...

Ralph A. Schmid, dk5ras ralph at schmid.xxx
Sun Oct 19 10:09:10 EDT 2014


Hi,

 

I played around a bit with UHD, and I found that I can crash it quite fast
when sampling rate is at 16M or more. 

 

Here the output of a uhd_fft session while changing frequencies and
increasing sample rate: 

 

as at ubuntu:~/uhd/host/tests$ uhd_fft 

linux; GNU C++ version 4.8.2; Boost_105400; UHD_003.008.000-6-gbde8e9a3

 

-- Operating over USB 3.

-- Initialize CODEC control...

-- Initialize Radio control...

-- Performing register loopback test... pass

-- Performing register loopback test... pass

-- Performing CODEC loopback test... pass

-- Performing CODEC loopback test... pass

-- Asking for clock rate 32.000000 MHz

-- Actually got clock rate 32.000000 MHz

-- Performing timer loopback test... pass

-- Performing timer loopback test... pass

Using Volk machine: avx_32_mmx_orc

-- Tune Request: 3025.000000 MHz

--   The RF LO does not support the requested frequency:

--     Requested LO Frequency: 3025.000000 MHz

--     RF LO Result: 3024.999997 MHz

--   Attempted to use the DSP to reach the requested frequency:

--     Desired DSP Frequency: -0.000003 MHz

--     DSP Result: -0.000003 MHz

--   Successfully tuned to 3025.000000 MHz

-- 

 

UHD Warning:

    Tune Request: 0.000002 MHz

      The requested RX frequency is outside of the system range, and has
been clipped:

        Target Frequency: 0.000002 MHz

        Clipped Target Frequency: 34.000000 MHz

      The RF LO does not support the requested frequency:

        Requested LO Frequency: 34.000000 MHz

        RF LO Result: 50.000000 MHz

      Attempted to use the DSP to reach the requested frequency:

        Desired DSP Frequency: 16.000000 MHz

        DSP Result: 16.000000 MHz

      Successfully tuned to 34.000000 MHz

-- Successfully tuned to 1820.000000 MHz

-- 

OOOOOOOOOO

UHD Error:

    The receive packet handler caught an exception.

    ValueError: bad vrt header or invalid packet length

UHD source block got error code 0xf

DOOOOOOOOOOOOOOOOOOOO-- Tune Request: 945.000000 MHz

--   The RF LO does not support the requested frequency:

--     Requested LO Frequency: 945.000000 MHz

--     RF LO Result: 944.999999 MHz

--   Attempted to use the DSP to reach the requested frequency:

--     Desired DSP Frequency: -0.000001 MHz

--     DSP Result: -0.000001 MHz

--   Successfully tuned to 945.000000 MHz

-- 

OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO

UHD Error:

    The receive packet handler caught an exception.

    ValueError: bad vrt header or invalid packet length

UHD source block got error code 0xf

DOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO
OOOOOOOOOOOOOOO

UHD Error:

    The receive packet handler caught an exception.

    ValueError: bad vrt header or invalid packet length

UHD source block got error code 0xf

D

 

Stuff crashes that badly that even commands like lsusb do not work any more
L

 

Any ideas?

 

Ralph.

 

 

--

 

Ralph A. Schmid

Mondstr. 10

90762 Fürth

+49-171-3631223

 <mailto:ralph at schmid.xxx> ralph at schmid.xxx

 <http://www.bclog.de/> http://www.bclog.de/

 

 

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