Re: [Discuss-gnuradio] raspi FAQ/HOWTO/recipe ??????

[West, Nathan]

On Mon, Apr 18, 2016 at 3:27 AM, Douglas Geiger <address@hidden> wrote:

I know I'm a little late to this party, but I thought I'd point this out: the output "VOLK: Error allocating memory (posix_memalign: 22)" suggests you are running into this known issue: http://gnuradio.org/redmine/issues/692

If this is indeed a rPi Rev B, then this is the known/old issue of volk_get_alignment() returning a value on 1 on that arch, which then breaks posix_memalign. I believe this has been fixed in more recent releases, so perhaps jessie-backports can help you there?

Indeed. https://github.com/gnuradio/volk/commit/cc1abd2ea27c7f303efaa6466e979700000915ed has been in VOLK since before v1.0

 

 Good luck,

  Doug

On Wed, Apr 13, 2016 at 4:45 AM, Rob Roschewsk <address@hidden> wrote:

Marcus,

Thanks for responding.

I'm looking to build a headless FM receiver to record and stream public service communication (fire, police, etc.). We will stream as many channels as possible that fall into a given passband.

I already have a system running on a PC and now would like to port it to the PI.

I understand it maybe an "up hill" path, but the thought is to deploy multiple inexpensive units around a geographic area all feeding a central streaming server.

The Pi is running Raspian Jesse .... I started with the distribution packages but ran into problems right out of the blocks and thought it would be best to use the latest code before asking questions :)

I understand cross compiling is the way to go.

Since I brought it up, here was the error I saw when I tried to run the script that runs on the PC but fails spectacularly on the raspberry pi with the precompiled packages ....

address@hidden:~/sdr/multirx $ ./multirx_nogui.py -s 49 noaa.xml
linux; GNU C++ version 4.9.1; Boost_105500; UHD_003.007.003-0-unknown

high=162500000 low=162400000 span=100000
center=162450000
gr-osmosdr 0.1.3 (0.1.3) gnuradio 3.7.5
built-in source types: file osmosdr fcd rtl rtl_tcp uhd miri hackrf bladerf rfspace airspy
Using device #0 Realtek RTL2838UHIDIR SN: 00000108
Found Elonics E4000 tuner
Exact sample rate is: 1000000.026491 Hz
Using Volk machine: generic_orc
VOLK: Error allocating memory (posix_memalign: 22)
VOLK: Error allocating memory (posix_memalign: 22)
VOLK: Error allocating memory (posix_memalign: 22)
Segmentation fault

_______________________________________________
Discuss-gnuradio mailing list
address@hidden
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

--

Doug Geiger
address@hidden

_______________________________________________
Discuss-gnuradio mailing list
address@hidden
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio