Re: GPIO lines on RPi4

[Marcus Müller]

It gets even better:

We've launched a feature in 3.8.1.0 (and on master before that, as we do 
with any feature that ends up in a maintenance release) that we hope 
doesn't come back to bite us due to enabling unclean design. But, we 
must build best practices so that it doesn't go unused, either, so:

Assuming you're using GNU Radio 3.8.1.0 (or later, once we release 
something), you can make use of the "Python Snippets" in GRC.

Cheers,
Marcus

On 18/06/2020 23.17, Marcus D. Leech wrote:
> On 06/18/2020 03:54 PM, jean-michel.friedt@femto-st.fr wrote:
> > My approach:
> > * build your grc chart from GNU Radio Companion and generate the .py file
> > * edit the py file and import pygpio
> > * play with the RPi4 GPIO in your python script.
> >
> > See attached script, with a python server included in the Python script
> > to control an RF switch from a GNU Octave TCP/IP client talking to the 
> > Python
> > TCP/IP server.
> >
> > I am presenting this approach to hardware control at
> > http://jmfriedt.free.fr/sdra_radar.pdf
> >
> > JM
> If you use "Python Module" block, you can write a lot of 
> non-GnuRadio-esque python, import anything you want, etc, etc.  No editing
>    of the output python required, necessarily.
>
>
> > --
> > JM Friedt, FEMTO-ST Time & Frequency/SENSeOR, 26 rue de l'Epitaphe,
> > 25000 Besancon, France
> >
> > June 18, 2020 9:40 PM, "Da Fy" <diver863uk@gmail.com> wrote:
> >
> > > Hi All, does anyone have an example of how to control GOIO lines on 
> > > the RPi4 from within a GRC
> > > flowgraph. I’m guessing it’s an OOT module.
> > >
> > > I need to generate a signal of a few 100Hz & control GPIO lines at 
> > > various points though the cycle.
> > >
> > > Alternatively, I could generate the signal & lines with external 
> > > hardware & read them with
> > > GnuRadio.
> > >
> > > Tnx, Dave

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