Help with USRP and USB permissions

GNU Radio
1

Hey all,

I’ve seen two different methods for setting up USB permissions
correctly, and I can’t seem to get either to work. The first way is
udev, the other method is hotplug.

So I tried udev first, and created /etc/udev/rules.d/60-usrp.rules:

USRP without loaded firmware (FX2)

BUS==“usb”, SYSFS{idVendor}==“fffe”, SYSFS{idProduct}==“0002”,
SYSFS{bcdDevice}==“0002”, GROUP=“usrp”, RUN+="/usr/local/bin/usrper
load_standard_bits"
BUS==“usb”, SYSFS{idVendor}==“fffe”, SYSFS{idProduct}==“0002”,
SYSFS{bcdDevice}==“0004”, GROUP=“usrp”, RUN+="/usr/local/bin/usrper
load_standard_bits"

USRP with loaded firmware

BUS==“usb”, SYSFS{idVendor}==“fffe”, SYSFS{idProduct}==“0002”,
SYSFS{bcdDevice}==“0102”, GROUP=“usrp”
BUS==“usb”, SYSFS{idVendor}==“fffe”, SYSFS{idProduct}==“0002”,
SYSFS{bcdDevice}==“0104”, GROUP=“usrp”

So then I reboot, plugin my device, and it seems to set permissions
correctly:

gnychis@cyprus ~/ $ ls -l /dev | grep usrp
crw-rw---- 1 root usrp 442, 5 Feb 12 11:47 usbdev1.6_ep00

So now I try to run an example:
./usrp_wfm_rcv.py
usrp_open_interface:usb_claim_interface: failed interface 0
could not claim interface 0: Operation not permitted
open_nth_cmd_interface: open_cmd_interface failed

I am in the group, and I have logged out and back in since (completely
rebooted for udev…):
usrp:x:1004:gnychis

So the other method was with hotplug, and i made /etc/hotplug/usb/usrp:
#!/bin/sh
chown root:usb “$DEVICE”
chmod ug+rw “$DEVICE”

and usrp.usermap:
usrp 0x0003 0xfffe 0x0002 0 0 0 0 0 0 0
0

I am in fact using the same vendor and product id:
cyprus SDR # lsusb
Bus 001 Device 006: ID fffe:0002

So I rebooted, and i was in the “usb” group, but again… still get the
same error.

Any ideas? :slight_smile:

Thanks!
George

2

On Mon, Feb 12, 2007 at 11:59:07AM -0500, George N. wrote:

load_standard_bits"
BUS==“usb”, SYSFS{idVendor}==“fffe”, SYSFS{idProduct}==“0002”,
SYSFS{bcdDevice}==“0004”, GROUP=“usrp”, RUN+=“/usr/local/bin/usrper
load_standard_bits”

The suggestion in the wiki is known to work.

This is the relevant part from http://gnuradio.org/trac/wiki/UdevConfig:

rule to grant read/write access on USRP to group named usrp.

to use, install this file in /etc/udev/rules.d as 10-usrp.rules

ACTION==“add”, BUS==“usb”, SYSFS{idVendor}==“fffe”,
SYSFS{idProduct}==“0002”, GROUP:=“usrp”, MODE:=“0660”

Eric

3

flawless victory

but now i have another problem, that i some how created using those two
methods below… I searched the mailing list and google for this but
couldn’t find a solution.

gnychis@cyprus ~/school/SDR/gnuradio/gnuradio-examples/python/usrp $
./usrp_wfm_rcv.py
write_internal_ram failed: error sending control message: Protocol error
usrp: failed to load firmware /usr/share/usrp/rev2/std.ihx.

In dmesg:
usb 1-7: usbfs: USBDEVFS_CONTROL failed cmd python rqt 64 rq 160 len 3
ret -71

I did not change any kernel settings… only things i changed are what i
listed as trying to get the permission thing to work.

We have two USRP’s and two desktops, the board worked on the other
desktop, therefore its not the board … and i tried the other board on
my desktop and it doesn’t work… so its gotta be my comp.

Additionally, I tried make uninstall and rebuilt everything… no change

any ideas?

Thanks!
George