Hi All,
I have just upgraded my laptop to the latest version of GNU Radio Companion
(ver 3.8.2.0 (Python 3.6.9)), and am now trying to use it to monitor a block of
spectrum with my USRP B210. Unfortunately the flowgraph won’t run (even though
it ran in my old GNU Radio setup), and instead prints the following message to
the console:
linux; GNU C++ version 7.3.0; Boost_106501; UHD_003.010.003.000-0-unknown
UHD Warning:
EnvironmentError: IOError: Could not find path for image: usrp_b200_fw.hex
Using images directory: <no images directory located>
Set the environment variable 'UHD_IMAGES_DIR' appropriately or follow the
below instructions to download the images package.
Please run:
"/usr/lib/x86_64-linux-gnu/uhd/utils/uhd_images_downloader.py"
Traceback (most recent call last):
File "/home/anyone/Documents/Brendan/GNU-Radio/top_block.py", line 244, in
<module>
main()
File "/home/anyone/Documents/Brendan/GNU-Radio/top_block.py", line 220, in
main
tb = top_block_cls()
File "/home/anyone/Documents/Brendan/GNU-Radio/top_block.py", line 87, in
__init__
channels=list(range(0,1)),
File "/usr/lib/python3/dist-packages/gnuradio/uhd/__init__.py", line 125, in
constructor_interceptor
return old_constructor(\*args)
File "/usr/lib/python3/dist-packages/gnuradio/uhd/uhd_swig.py", line 3259, in
make
return _uhd_swig.usrp_source_make(device_addr, stream_args,
issue_stream_cmd_on_start)
RuntimeError: LookupError: KeyError: No devices found for ----->
Device Address:
serial: 318425D
The above message suggests GRC is calling version **003.010.003.000-0** of the
UHD driver. This is weird, as last week I installed version **3.15.0.0** of
the UHD driver on my laptop, after first uninstalling the old driver (or so I
thought…).
However, if I run uhd_usrp_probe or uhd_find_devices, I get a message
confirming that I am indeed running v3.15.0.0 of the UHD driver:
* linux; GNU C++ version 7.5.0; Boost_106501; **UHD_3.15.0.HEAD-0-gaea0e2de**
If I look in the folder “/usr/lib/x86_64-linux-gnu/”, I find the files
**libuhd.so.003.010.003** and **libuhd.so.3.15.0** are both present — but I am
pretty sure there should only be one of them present!
This “dual-install” problem seems to be fairly common among USRP/GNU Radio
users, but so far I haven’t found any actual solutions.
There is also a second error message in the above console output:
**“EnvironmentError: IOError: Could not find path for image:
usrp_b200_fw.hex”**. This is baffling, as I have run the script
“/usr/local/lib/uhd/utils/uhd_images_downloader.py“ three times, and am
confident that the FPGA images have downloaded successfully (for the record,
they are in /usr/local/share/uhd/images).
If anyone can tell me how to resolve these problems, I would be very grateful!
Regards,
Brendan.
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