Progress (NOT!) on Sheeva Plug Gnu Radio

GNU Radio
1

I managed to get GRC up.

But when I try to run an application that uses anything graphic, it
segfaults, and dumps core, from
deep within libdricore.so – related to OpenGL, I think?

So, rip out the GUI stuff.

Use my 4-channel audio-type SID receiver without any GUI goop:

Continuous aOaOaOaOaO until I interrupt it.

The audio_to_file.py example seems to work, though :slight_smile:

–
Marcus L.
Principal Investigator
Shirleys Bay Radio Astronomy Consortium

2

On Wed, Apr 7, 2010 at 21:55, Marcus D. Leech [email protected] wrote:

But when I try to run an application that uses anything graphic, it
segfaults, and dumps core, from
deep within libdricore.so – related to OpenGL, I think?

So, rip out the GUI stuff.

You can turn off OpenGL rendering by config file, see the README.gl in
gr-wxgui. On your system it’s probably just using libmesa, which is a
pure host software based emulation of OpenGL anyway.

As far as audio, check out what sample rates the ALSA driver supports
on that hardware. It’s probably substituting some other rate from
what you asked for, and that’s why you’re getting audio overruns.

Johnathan

3

On 04/08/2010 12:55 AM, Marcus D. Leech wrote:

Continuous aOaOaOaOaO until I interrupt it.

The audio_to_file.py example seems to work, though :slight_smile:

Do you think this would work as a remote data collector (USRP + plug)
feeding data over the network to a central PC? That might be useful
since it reduces the cost of the receiver nodes.

Philip

4

On 04/08/2010 07:50 AM, Philip B. wrote:

Too early to tell. Apart from the above noted performance issues, it
seems deeply-broken on this platform
as well. Further testing last night, after I started ripping
functionality out of my flow-graph until I got
the aO down to a dull roar left me puzzled.

–
Marcus L.
Principal Investigator
Shirleys Bay Radio Astronomy Consortium

5

On 04/08/2010 08:23 AM, Marcus D. Leech wrote:

Use my 4-channel audio-type SID receiver without any GUI goop:

Too early to tell. Apart from the above noted performance issues, it
seems deeply-broken on this platform
as well. Further testing last night, after I started ripping
functionality out of my flow-graph until I got
the aO down to a dull roar left me puzzled.

If there is any floating point, I suspect it won’t work since FP is
emulated on the plug.

Philip