On 05/07/2018 09:42 PM, Hojoon Yang via USRP-users wrote:
Hi,
When I executed the "uhd_find_devices"
I got "[ERROR] [USB] USB open failed: insufficient permissions."
However, when I put sudo in it(i.e. sudo uhd_find_devices", there is
no such error.
Also, when I typed "./tx_waveforms ..."
I got an following WARNING
"[WARNING] [UHD] Unable to set the thread priority. Performance may be
negatively affected.
Please see the general application notes in the manual for instructions.
EnvironmentError: OSError: error in pthread_setschedparam"
similarly, the warning disappeared when I put the sudo in it.
Marcus said it is incomplete installation, if the sudo needed.
As Marcus recommended, I created(because there was no such file)
/etc/udev/rules.d/10-usrp.rules and put the following contents.
#
# Copyright 2011,2015 Ettus Research LLC
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
#USRP1
SUBSYSTEMS=="usb", ATTRS{idVendor}=="fffe", ATTRS{idProduct}=="0002",
MODE:="0666"
#B100
SUBSYSTEMS=="usb", ATTRS{idVendor}=="2500", ATTRS{idProduct}=="0002",
MODE:="0666"
#B200
SUBSYSTEMS=="usb", ATTRS{idVendor}=="2500", ATTRS{idProduct}=="0020",
MODE:="0666"
SUBSYSTEMS=="usb", ATTRS{idVendor}=="2500", ATTRS{idProduct}=="0022",
MODE:="0666"
SUBSYSTEMS=="usb", ATTRS{idVendor}=="3923", ATTRS{idProduct}=="7813",
MODE:="0666"
SUBSYSTEMS=="usb", ATTRS{idVendor}=="3923", ATTRS{idProduct}=="7814",
MODE:="0666"
However, nothing changed.
Do I need to re-install the uhd?
Regards,
Hojoon
You also need to:
sudo udevadm control --reload-rules
And then replug your USRP
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