Re: USRP B200mini Does Not Work in Gnu Radio With Latest Version of Linux Mint (21.2)

[Marcus D. Leech]

On 25/07/2023 18:44, Gary Schafer wrote:
> > From: "Marcus D. Leech" <patchvonbraun@gmail.com>
> > To: discuss-gnuradio@gnu.org
> > Subject: Re: USRP B200mini Does Not Work in Gnu Radio With Latest
> >     Version of Linux Mint (21.2)
> > Message-ID: <ca716b75-6403-4d17-1630-981fe970d029@gmail.com>
> > Content-Type: text/plain; charset=UTF-8; format=flowed
> >
> > On 25/07/2023 11:20, Sylvain Munaut wrote:
> > > > If that's the case, then Mint are now packaging a version of UHD 
> > > > that is NOT
> > > >      from NI/Ettus.
> > > Doesn't UHD have like a plugin system that can dynamically load .so
> > > files ? The UHD_MODULE_PATH thing ?
> > >
> > > So it could be a perfectly legit UHD just with some soapy plugin
> > > loaded dynamically.
> > >
> > > Cheers,
> > >
> > >       Sylvain
> > Yeah, so, in the presence of this plug-in, the "scan for radios" when
> > you don't give an explicit address is going to work
> >     differently, so:
> >
> > uhd_usrp_probe --args "type=b200"
> >
> > Should work, hopefully, because it will force it (I think) to go down
> > the "USRP devices" pathway.
>
> Thank you, all, for the response. I learned more in the one minute it 
> took to read through your (Marcus L, Sylvain, and Marcus M) answers 
> then I did in several hours of trying to find an answer via Google.
>
> We're one big step closer to an answer. When I tried "uhd_usrp_probe 
> --args "type=b200"" on the command line, I got the following response:
>
> [INFO] [UHD] linux; GNU C++ version 11.2.0; Boost_107400; UHD_4.1.0.5-3
> [INFO] [B200] Loading firmware image: 
> /usr/share/uhd/images/usrp_b200_fw.hex...
> [INFO] [B200] Detected Device: B200mini
> [INFO] [B200] Loading FPGA image: 
> /usr/share/uhd/images/usrp_b200mini_fpga.bin...
> [INFO] [B200] Operating over USB 3.
> [INFO] [B200] Initialize CODEC control...
> [INFO] [B200] Initialize Radio control...
> [INFO] [B200] Performing register loopback test...
> [INFO] [B200] Register loopback test passed
> [INFO] [B200] Setting master clock rate selection to 'automatic'.
> [INFO] [B200] Asking for clock rate 16.000000 MHz...
> [INFO] [B200] Actually got clock rate 16.000000 MHz.
>   _____________________________________________________
>  /
> |       Device: B-Series Device
> |     _____________________________________________________
> |    /
> |   |       Mboard: B200mini
> |   |   serial: 3279479
> |   |   name: B200mini
> |   |   product: 30521
> |   |   revision: 6
> |   |   FW Version: 8.0
> |   |   FPGA Version: 7.0
> |   |
> |   |   Time sources:  none, internal, external
> |   |   Clock sources: internal, external
> |   |   Sensors: ref_locked
> |   |     _____________________________________________________
> |   |    /
> |   |   |       RX DSP: 0
> |   |   |
> |   |   |   Freq range: -8.000 to 8.000 MHz
> |   |     _____________________________________________________
> |   |    /
> |   |   |       RX Dboard: A
> |   |   | _____________________________________________________
> |   |   |    /
> |   |   |   |       RX Frontend: A
> |   |   |   |   Name: FE-RX1
> |   |   |   |   Antennas: TX/RX, RX2
> |   |   |   |   Sensors: temp, rssi, lo_locked
> |   |   |   |   Freq range: 50.000 to 6000.000 MHz
> |   |   |   |   Gain range PGA: 0.0 to 76.0 step 1.0 dB
> |   |   |   |   Bandwidth range: 200000.0 to 56000000.0 step 0.0 Hz
> |   |   |   |   Connection Type: IQ
> |   |   |   |   Uses LO offset: No
> |   |   | _____________________________________________________
> |   |   |    /
> |   |   |   |       RX Codec: A
> |   |   |   |   Name: B200mini RX dual ADC
> |   |   |   |   Gain Elements: None
> |   |     _____________________________________________________
> |   |    /
> |   |   |       TX DSP: 0
> |   |   |
> |   |   |   Freq range: -8.000 to 8.000 MHz
> |   |     _____________________________________________________
> |   |    /
> |   |   |       TX Dboard: A
> |   |   | _____________________________________________________
> |   |   |    /
> |   |   |   |       TX Frontend: A
> |   |   |   |   Name: FE-TX1
> |   |   |   |   Antennas: TX/RX
> |   |   |   |   Sensors: temp, lo_locked
> |   |   |   |   Freq range: 50.000 to 6000.000 MHz
> |   |   |   |   Gain range PGA: 0.0 to 89.8 step 0.2 dB
> |   |   |   |   Bandwidth range: 200000.0 to 56000000.0 step 0.0 Hz
> |   |   |   |   Connection Type: IQ
> |   |   |   |   Uses LO offset: No
> |   |   | _____________________________________________________
> |   |   |    /
> |   |   |   |       TX Codec: A
> |   |   |   |   Name: B200mini TX dual DAC
> |   |   |   |   Gain Elements: None
>
> I then went back to Gnu Radio and my flowgraph (again, just a USRP 
> source going into a frequency sink) and put "type=b200" into the 
> "Device Argument" entry of the USRP source block. This time, I 
> received the following response:
>
> Executing: /usr/bin/python3 -u 
> /home/gary/SDR-Software/gnuradio/usrpSpectrumAnalyzer.py
>
> [INFO] [UHD] linux; GNU C++ version 11.2.0; Boost_107400; UHD_4.1.0.5-3
> [INFO] [B200] Detected Device: B200mini
> [INFO] [B200] Operating over USB 3.
> [INFO] [B200] Initialize CODEC control...
> [INFO] [B200] Initialize Radio control...
> [INFO] [B200] Performing register loopback test...
> [INFO] [B200] Register loopback test passed
> [INFO] [B200] Setting master clock rate selection to 'automatic'.
> [INFO] [B200] Asking for clock rate 16.000000 MHz...
> [INFO] [B200] Actually got clock rate 16.000000 MHz.
> [INFO] [B200] Asking for clock rate 40.000000 MHz...
> [INFO] [B200] Actually got clock rate 40.000000 MHz.
>
> > > > Done (return code -11)

I think from the UHD perspective, everything is working as intended, but 
some part of Gnu Radio is throwing an exception
  (perhaps Qt GUI?).

You might want to post your flow-graph and give some context to the 
discuss-gnuradio mailing list.

For more UHD information, you might fruitfully start here:

https://kb.ettus.com/Knowledge_Base

The gr-uhd interface from Gnu Radio into UHD is documented here:

https://www.gnuradio.org/doc/doxygen/group__uhd__blk.html