Re: USRP drivers vs UHD drivers in gnuradio-companion

Also, it used to be that I needed to be in the “usrp” group in order to access
the USRP.

Now i deleted this group and i still have access to usrp (even when the source
is not a uhd one but a usrp source)!

My understanding is that if i use the uhd device then i can do that
(ie, don’t need to be in the “usrp” group) but it seems to be happening even
with the usrp source.

What am I missing?

Merely deleting the “usrp” group from group file doesn’t do anything until you
log-out/log-in again.

yes I did logout/login (even rebooted the system to make sure)…

Achilleas

On 01/25/2011 10:30 PM, Achilleas A. wrote:

yes I did logout/login (even rebooted the system to make sure)…

Well, in that case, probably your “UDEV” rules create the device world
read/write.

Check /etc/udev/rules.d/*usrp.rules


Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org

On 01/25/2011 07:30 PM, Achilleas A. wrote:

Also, it used to be that I needed to be in the “usrp” group in order to access
the USRP.

Now i deleted this group and i still have access to usrp (even when the source
is not a uhd one but a usrp source)!

My understanding is that if i use the uhd device then i can do that
(ie, don’t need to be in the “usrp” group) but it seems to be happening even
with the usrp source.

What am I missing?

It depends on your udev settings:
http://www.ettus.com/uhd_docs/manual/html/usrp1.html#linux-setup-udev

The udev instructions I put in the UHD manual set the device wide open
to anyone on the system.

-Josh

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