[srslte-users] Error with USRP b200 mini

[Cedric Roux]

Hi Iulia,

just power cycle the usrp (unplug/replug the usb cable).
Sometimes those devices go crazy.

Regards,
Cédric.

On 2020-05-28 15:44, Iulia Gudovan wrote:
> Hello!
> I'm using USRP B200mini-i and I have a similar problem. Even if I set 
> nof_ports to 1 in enb.conf, I still get Error opening UHD: code 11 /  
> error opening rf and can't run anything. After this, if I run 
> uhd_find_devices or uhd_usrp_probe it says there are no UHD devices 
> found, even if the LEDs on the USRP are on and the device was detected 
> just moments ago when launching the eNodeB... What should I try?
> 
> On Tue, May 26, 2020 at 3:06 PM Andre Puschmann 
> <andre.puschmann at softwareradiosystems.com 
> <mailto:andre.puschmann at softwareradiosystems.com>> wrote:
> 
>     On 26/5/20 14:03, Ernesto Xload wrote:
>      > A lot of thanks Andre, where can I config this?
> 
>     In enb.conf, check for nof_ports  and set to 1
> 
>     With the mini you an only do TM1 with one antenna
> 
>     Cheers
>     Andre
> 
> 
> 
>      >
>      > Best regards.
>      >
>      > El mar., 26 may. 2020 a las 13:57, Andre Puschmann
>      > (<andre.puschmann at softwareradiosystems.com
>     <mailto:andre.puschmann at softwareradiosystems.com>
>      > <mailto:andre.puschmann at softwareradiosystems.com
>     <mailto:andre.puschmann at softwareradiosystems.com>>>) escribió:
>      >
>      >     Hey Ernesto,
>      >
>      >     You are trying to use a B200 mini with 2 channels. The mini
>     only has one
>      >     rtx chain.
>      >
>      >     Cheers
>      >     Andre
>      >
>      >
>      >
>      >     On 26/5/20 13:54, Ernesto Xload wrote:
>      >     > Does anyone know what is happening? :(
>      >     >
>      >     > Best regards and a lot of thanks in advance.
>      >     >
>      >     > El vie., 22 may. 2020 a las 12:25, Ernesto Xload
>      >     (<xload.es at gmail.com <mailto:xload.es at gmail.com>
>     <mailto:xload.es at gmail.com <mailto:xload.es at gmail.com>>
>      >     > <mailto:xload.es at gmail.com <mailto:xload.es at gmail.com>
>     <mailto:xload.es at gmail.com <mailto:xload.es at gmail.com>>>>) escribió:
>      >     >
>      >     >     Hello,
>      >     >
>      >     >     I'm trying to run srsLTE with a b200 mini, but I have the
>      >     following
>      >     >     error: Error opening RX stream: 10, can anybody help me?
>      >     >
>      >     >     Complete log:
>      >     >
>      >     >     Built in Release mode using commit d045213fb on branch
>     HEAD.
>      >     >
>      >     >     ---  Software Radio Systems LTE eNodeB  ---
>      >     >
>      >     >     Reading configuration file /root/.config/srslte/enb.conf...
>      >     >     Opening 1 RF devices with 2 RF channels...
>      >     >     [INFO] [UHD] linux; GNU C++ version 9.2.1 20200304;
>     Boost_107100;
>      >     >     UHD_3.15.0.0-2build5
>      >     >     [INFO] [LOGGING] Fastpath logging disabled at runtime.
>      >     >     [INFO] [B200] Loading firmware image:
>      >     >     /usr/share/uhd/images/usrp_b200_fw.hex...
>      >     >     Opening USRP with args: type=b200,master_clock_rate=23.04e6
>      >     >     [INFO] [B200] Detected Device: B205mini
>      >     >     [INFO] [B200] Loading FPGA image:
>      >     >     /usr/share/uhd/images/usrp_b205mini_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] Asking for clock rate 23.040000 MHz...
>      >     >     [INFO] [B200] Actually got clock rate 23.040000 MHz.
>      >     >     [INFO] [MULTI_USRP]     1) catch time transition at pps
>     edge
>      >     >     [INFO] [MULTI_USRP]     2) set times next pps
>     (synchronously)
>      >     >     /home/xload/4g/srsLTE/lib/src/phy/rf/rf_uhd_imp.c.589:
>     Error
>      >     opening
>      >     >     RX stream: 10
>      >     >
>      >     >     /home/xload/4g/srsLTE/lib/src/radio/radio.cc.36: Error
>     opening
>      >     RF device
>      >     >
>      >     >     Failed to find device UHD with args auto
>      >     >     Error initializing radio.
>      >     >
>      >     >     Best regards.
>      >     >     Ernesto Sanchez
>      >     >
>      >     >
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> 
> 
>     -- 
>     Andre Puschmann
> 
>     Software Radio Systems (SRS)
>     http://www.softwareradiosystems.com
> 
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