On 04/13/2016 11:05 PM, Jean Luc wrote:
I've been trying as well to use GR on RPi (model 3), the ultimate
purpose would be radio astronomy. A smaller form factor such as RPI's
makes a remote installation more palatable than a full PC.
I wasn't able to compile it on RPi but compromised on using a more
recent version (3.7.9-3~bpo8+1) taken from jessie-backports. The steps
are below.
sudo apt-key adv --keyserver keyserver.ubuntu.com
<http://keyserver.ubuntu.com> --recv-keys 8B48AD6246925553
7638D0442B90D010
sudo vi /etc/apt/sources.list and add the following line:
deb http://ftp.debian.org/debian jessie-backports main
sudo apt-get update
sudo apt-get -t jessie-backports install gnuradio
On the positive side, GR works on RPi3. However, it does keep one core
to 100% in many cases. This was with input from an SDR with the 2Msps
rate, though. Actually, one more problem: audio output. That part
didn't work ("check topology failed on audio_alsa_sink"); I posted a
message on the list the other day. I cannot say it's a GR problem,
could be mine; I have yet to understand what the problem is.
JL.
I'll point out that ARCH generally has up-to-date packages for this
stuff, including for most of the ARM-based SBCs.
I run ARCH on various Odroid platforms, running radio-astronomy GR
flow-graphs, with good success. I run these "headless", without any
graphical display from the Odroid--it's just the digital radio +
processing platform.
On Wed, Apr 13, 2016 at 7:45 AM, Rob Roschewsk <pabut...@gmail.com
<mailto:pabut...@gmail.com>> 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 ....
roschews@raspberrypi:~/sdr/multirx $ ./multirx_nogui.py
<http://nogui.py/> -s 49 noaa.xml
linux; GNU C++ version 4.9.1; Boost_105500; UHD_003.007.003-0
<tel:0030070030>-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 <tel: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
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