Hi everyone. Got a brand-new B200-mini device, installed all the tools etc. Ubuntu sees the device correctly once it's attached to the host:
<home>:~$ lsusb Bus 001 Device 004: ID 2500:0021 Ettus Research LLC USRP B200-mini ........... However, any attempt to run initial UHD verification (as per https://kb.ettus.com/Verifying_the_Operation_of_the_USRP_Using_UHD_and_GNU_Radio), for example, by running uhd_find_devices, fails in the following way : <home>:~$ uhd_find_devices [INFO] [UHD] linux; GNU C++ version 11.3.0; Boost_107400; UHD_4.4.0.0-0ubuntu1~jammy1 [INFO] [B200] Loading firmware image: /usr/share/uhd/images/usrp_b200_fw.hex... No UHD Devices Found -------------------------- When I re-run 'lsusb' now, The 'B200' device no longer shows up: <home>:~$ lsusb .................. ------------------------------------- At this point, it now requires power-cycling the B200 in order for it to be recognized by the OS again (which presumably re-loads the default factory image that comes on the built-in flash) So, the problem is this: it appears as if in the process of loading the firmware image (which comes as a part of running any of the UHD utilities) the device loses connection to the system, causing it to no longer enumerate on the OS, so that the subsequent steps (of 'uhd_find_devices' in our example) can no longer be executed (due to 'No UHD Devices found'). The questions I have are these : 1) Is this something generally known, with a known solution, or is there something wrong with my particular system, the B200 device, driver installation etc.? 2) Is the problem really caused by the FPGA image loading, or some other non-FPGA component being disturbed causing the device to disconnect? Is it possible the image attempted to be loaded the wrong one( usrp_b200_fw.hex incompatible with the hardware)? 2) Is there a work-around? For example (preferred by me): can I run UHD with the option passed to commands of not-loading the FPGA image every time a command is executed? Say, a config file that UHD reads to know what to do with the device? I want to be able to deal with the B200 with whatever static image I've loaded up on it (be it the factory image or some future custom image) Thank you.
_______________________________________________ USRP-users mailing list -- usrp-users@lists.ettus.com To unsubscribe send an email to usrp-users-le...@lists.ettus.com
