Re: GNU Radio on Raspberry Pi 4?

[Franco VENTURI]

Glen,
if you are interested in using SDRplay API version 3.X (I think the latest 
version of their API is 3.07), and you are on GNU Radio 3.7, you may want to 
take a look at the gr-sdrplay GNU Radio OOT module I modified to work with 
SDRplay API version 3.X: 
https://github.com/fventuri/gr-sdrplay/tree/API3+RSPduo (notice the non-default 
branch name: 'API3+RSPduo').

If instead you are on GNU Radio 3.9/master, I rewrote that OOT module from 
scratch, called it 'gr-sdrplay3', and you'll find it here: 
https://github.com/fventuri/gr-sdrplay3

Let me know if you have problems building or running those modules (possibly by 
creating a new issue in GitHub to avoid hijacking this thread).

Franco
 

> On 12/17/2020 1:34 PM Glen Langston <glen.i.langston@gmail.com> wrote:
> 
>  
> Concerning Full Raspberry Pi OS software installed on a single Raspberry Pi 
> image,
> we’re encouraging high schools to use this installation document.
> https://docs.google.com/document/d/1hfS7cRx3emlZz0sTs583zN8o-35nKtIej6BYMKCJLXY/edit?usp=sharing
> 
> The document includes the links to the OS and hardware to purchase.
> 
> Unfortunately this is a 3.7.13.4 Gnuradio release, as we’ve not had the 
> strength
> to get the SDRPlay software support working for newer gnuradio Releases.
> 
> Best regards, 
> 
> Glen
> 
> > On Dec 17, 2020, at 12:03 PM, Kyeong Su Shin <ksshin@postech.ac.kr> wrote:
> > 
> > To whom it may concern:
> > 
> > Just a tip: If you are building GNU Radio from the source, dependencies and 
> > build procedures for Raspberry Pi is available at the GNU Radio Wiki. It 
> > assumes that you are doing on-board compile.
> > 
> > See: https://wiki.gnuradio.org/index.php/InstallingGR#From_Source
> > 
> > 
> > Regards,
> > Kyeong Su Shin
> > 보낸 사람: Albin Stigö <albin.stigo@gmail.com> 대신 Discuss-gnuradio 
> > <discuss-gnuradio-bounces+ksshin=postech.ac.kr@gnu.org>
> > 보낸 날짜: 2020년 12월 18일 금요일 오전 1:13
> > 받는 사람: Kristoff <kristoff@skypro.be>; GNURadio Discussion List 
> > <discuss-gnuradio@gnu.org>
> > 제목: Re: GNU Radio on Raspberry Pi 4?
> >  
> > There's no special configuration. Just install dependencies and build from 
> > source. Put root on SSD or it will be very slow. Ubuntu 65bit is fine. In 
> > general GNURadio is hell to build and get dependencies right, but in the 
> > end it works well.
> > 
> > --Albin
> > 
> > On Thu, Dec 17, 2020, 16:37 Kristoff <kristoff@skypro.be> wrote:
> > Albin,
> > 
> > 
> > Can you share your configuration for this? Do you need to set up 
> > something special?
> > Can you do this on standard ubuntu 64 bit (20.04LTS or 20.10) on a pi4b 
> > or do you need another distro for this?
> > 
> > 
> > I read somewhere opengl on the pi4 has not been released yes as it has 
> > the pi4 has a more recent GPU.
> > Or am I completely wrong?
> > 
> > 
> > 73
> > kristoff - ON1ARF
> > 
> > 
> > On 17/12/2020 1:22 p.m., Albin Stigö wrote:
> > > I suspect a lot of the graphics could run perfectly fine if they took 
> > > advantage of the gpu better. A lot of the current rendering in 
> > > GNURadio (and GQRX) is very cpu bound.
> > >
> > > I had a spectrum and waterfall running easily at 60fps on a pi3 by 
> > > using opengl properly. Using vulkan on pi4 the sky is the limit.
> > >
> > > --Albin
> > >
> > > On Thu, Dec 17, 2020, 13:18 Marcus Müller <mueller@kit.edu 
> > > <mailto:mueller@kit.edu>> wrote:
> > >
> > >     Can't stress this enough. Running a 32 bit Linux on a RPi 4 would be
> > >     like running Windows 98 on a modern PC and expecting top performance
> > >     from the CPU. You're not making use of the CPU you have, you're only
> > >     making use of a legacy mode that it still supports.
> > >
> > >     Best regards,
> > >     Marcus
> > >
> > >     On 17.12.20 10:53, Albin Stigö wrote:
> > >     > 64bit mode is most likely better because in addition to being
> > >     64bit it
> > >     > enables additional cpu features (certain new instructions and
> > >     more SIMD
> > >     > NEON registers)
> > >     >
> > >     > On Thu, Dec 17, 2020, 10:36 jean-michel.friedt@femto-st.fr
> > >     <mailto:jean-michel.friedt@femto-st.fr>
> > >     > <mailto:jean-michel.friedt@femto-st.fr
> > >     <mailto:jean-michel.friedt@femto-st.fr>>
> > >     <jean-michel.friedt@femto-st.fr
> > >     <mailto:jean-michel.friedt@femto-st.fr>
> > >     > <mailto:jean-michel.friedt@femto-st.fr
> > >     <mailto:jean-michel.friedt@femto-st.fr>>> wrote:
> > >     >
> > >     >     The benchmark on volk/64 bit kernel v.s 32 bit Raspbian is at
> > >     > https://pubs.gnuradio.org/index.php/grcon/article/view/73/55
> > >     >     <https://pubs.gnuradio.org/index.php/grcon/article/view/73/55>
> > >     >     last page. I get 3 to 7-fold improvement by volk_config on a
> > >     dedicated
> > >     >     toolchain for 64-bit CPU.
> > >     >
> > >     >     JM
> > >     >
> > >     >     --
> > >     >     JM Friedt, FEMTO-ST Time & Frequency, 26 rue de l'Epitaphe,
> > >     25000
> > >     >     Besancon, France
> > >     >
> > >     >     December 17, 2020 10:28 AM, "Kristoff" <kristoff@skypro.be
> > >     <mailto:kristoff@skypro.be>
> > >     >     <mailto:kristoff@skypro.be <mailto:kristoff@skypro.be>>> wrote:
> > >     >
> > >     >     > HI all,
> > >     >     >
> > >     >     > I also have a RPi4 (*).
> > >     >     > Some follow-up question.
> > >     >     >
> > >     >     > What OS would be the best for this?
> > >     >     > Would running 64 bit make a difference?
> > >     >     >
> > >     >     > I don't know to what degree this is related, but I did a
> > >     test running
> > >     >     > WebGL (**) on that pi, and I got about 1/3 of the frames per
> > >     >     second on
> > >     >     > my RPi4 compared to my laptop (which only has a UHD
> > >     Graphics 630
> > >     >     Mobile,
> > >     >     > so not the  best or latest neither)
> > >     >     > Is the GPU in the Pi4 good enough to run many GUI elements
> > >     in GNU
> > >     >     Radio
> > >     >     > at the same time?
> > >     >     >
> > >     >     > Kr.
> > >     >     >
> > >     >     > (*) RPi4B 8 GB, 120 SSD
> > >     >     >
> > >     >     > (*) https://webglsamples.org <https://webglsamples.org>
> > >     >     >
> > >     >     > On 16/12/2020 11:10 p.m., Dan Romanchik KB6NU wrote:
> > >     >     >
> > >     >     >> Has anyone successfully run GNU Radio on a Pi 4? I
> > >     recently purchased
> > >     >     >> an RTL-SDR dongle and thought it would be fun to
> > >     experiment a little
> > >     >     >> with GNU Radio and learn something about SDR.
> > >     >     >>
> > >     >     >> A couple of days ago, I fired up GNU Radio, and after
> > >     having some
> > >     >     >> trouble figuring out how to get the audio sink to talk to
> > >     the Pi, I
> > >     >     >> downloaded VE6EY's FM receiver flow graph. The flow graph
> > >     runs, but
> > >     >     >> the Pi 4 just doesn't seem to have enough horsepower to
> > >     run it in
> > >     >     real
> > >     >     >> time. The audio is slow and distorted.
> > >     >     >>
> > >     >     >> Thinking that it might be the WX widgets slowing down the
> > >     program, I
> > >     >     >> first deleted the FFT display widgets, then converted the
> > >     WX slider
> > >     >     >> controls to QT range controls. Neither had any effect on
> > >     how well the
> > >     >     >> flow graph ran.
> > >     >     >>
> > >     >     >> GQRX and CubicSDDR seem to work just fine. At least with
> > >     both of
> > >     >     them,
> > >     >     >> I'm able to receive FM broadcast and NOAA weather
> > >     station. But, maybe
> > >     >     >> the PI4 just doesn't have enough horsepower to run GNU
> > >     Radio? If so,
> > >     >     >> that's kind of disappointing.
> > >     >     >>
> > >     >     >> 73! <—ham radio lingo for “best regards"
> > >     >     >>
> > >     >     >> *Dan KB6NU*
> > >     >     >> CW Geek, Ham Radio Instructor
> > >     >     >> Author of the "No Nonsense" amateur radio license study
> > >     guides
> > >     >     >> Read my ham radio blog at http://www.kb6nu.com
> > >     <http://www.kb6nu.com>
> > >     >
> > >