[Discuss-gnuradio] help with USRP and USB permissions

[George Nychis]

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:

address@hidden ~/ $ 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.

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Any ideas? :)

Thanks!
George