Setting hw number

GNU Radio
1

Hi All,

I’m unable to get simple_ra to recognize the USRP1.
I have carried out the check below but do not know how to set the ‘hw
number’ in ‘simple_ra’

Hope someone is able to help.

Many thanks,

Frank

alpha@alpha:~$ cat /proc/asound/cards
0 [Intel ]: HDA-Intel - HDA Intel
HDA Intel at 0xfdff8000 irq 44
alpha@alpha:~$

alpha@alpha:~$ aplay --list-devices
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: VT2020 Analog [VT2020 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: Intel [HDA Intel], device 2: VT2020 HP [VT2020 HP]
Subdevices: 1/1
Subdevice #0: subdevice #0

2

Many thanks,
alpha@alpha:~$ aplay --list-devices
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: VT2020 Analog [VT2020 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: Intel [HDA Intel], device 2: VT2020 HP [VT2020 HP]
Subdevices: 1/1
Subdevice #0: subdevice #0

Hi Frank,

you are checking for Audio devices, the USRP is a regular USB device,
not
an audio device. You can see information about your USRP hardware with
uhd_find_devices, given you use the UHD to interface your USRP.

Try to find out if simple_ra also works with other devices than sound
cards.

Martin

3

Hi Martin,

OK thanks. I have actually attached a piece of wire to a socket on the
USRP and found that it is working.
I sent my previous E mail too soon without checking properly!

Thanks for the information though.

Frank

4

Frank
USRP doesn’t “manifest” as a sound device.

simple_ra takes a “–devid” argument that is in the style of the
gr-osmosdr device specifier. For USRP1, you’d
use:

–devid “uhd=a,type=usrp1”