Hello,
I recently did a clean installation of UHD 3.14.1 and gnuradio 3.7.13.5 on
Ubuntu 18.04 LTS, following the steps outlined in the Ettus knowledge base
for installation from source.
The installation worked great, and I started experimenting with the example
programs installed with UHD (located in /usr/lib/uhd/examples/). At first
they ran correctly and I was able to run the gpio and benchmark_rate
programs without issue, getting the normal expected output for my
b205mini-i.
Without making any changes to the system, and in the same shell session,
all of a sudden the example programs all started consistently generating
errors when I tried to run them:
dsmay4@UbuntuPrecision7530:/usr/lib/uhd/examples$ ./benchmark_rate
--rx_rate 10e6
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"
Creating the usrp device with: ...
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"
Error: LookupError: KeyError: No devices found for ----->
Empty Device Address
This is quite strange as my uhd_images_downloader isn't installed to that
directory, but it does run just fine. uhd_find_devices and uhd_usrp_probe
run fine and indicate no problems with the radio itself. Other sdr apps
using the b205 work just fine - the problem seems to only impact these
example programs.
I tried rebooting, as well as uninstalling and reinstalling UHD (which
reinstalled the example programs) but the problem persists. I'm mostly
interested in figuring out what caused the spontaneous change in system
behavior. I can't for the life of me figure out why just these apps can't
find the fpga images but everything else works just fine...
TIA,
Dave
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