[App_rpt-users] CHAN_PI

[David McGough]

The chan_pi driver first showed up in early 2016. From what I was told,
Jim coded it to work with a prototype pi-hat board that was being
developed by DMK engineering.

This pi-hat hardware included an I2C attached GPIO chip similar to an 
MCP23017. There was no code to directly drive the native RPi GPIO.

As for the audio device, based on the mixer-setting code, it appears to be
the Cirrus/Wolfson WM5102 I2S audio chip or similar.

I don't think this project ever made it beyond the early prototype phase
(anyone know???).  Back in that timeframe, there was major concern that
the CM108/CM119 USB chips might be on the rapid path to extinction. Now,
we know that genuine C-media CM119A and CM119B chips will continue to be
readily available....And, I expect there will be CM1xyz clones available
until the cows come home!


73, David KB4FXC






On Mon, 15 Apr 2019, Skyler F wrote:

> Would the CHAN_Pi support a GPIO -Based sound card? I would love to see
> support for a GPIO-Based Sound card, not USB.
> 
> It would be great to be able to add analog compatibility with all of these
> multimode digital hotspots, but they are GPIO based, and it would be
> awkward to wire a USB sound card.
> 
> 
> 
> 
> On Sun, Apr 14, 2019 at 1:39 PM Marshall Oldham <ke6pcv at cal-net.org> wrote:
> 
> > George,
> >
> > I have not seen a reply to your question on the list.
> >
> > So, I asked someone more knowledgeable.
> >
> > It is a raspberry pi specific driver for gpio.
> >
> > I believe it also does a few other things too.
> >
> > Hope this helps.
> >
> > Marshall - ke6pcv
> >
> >
> > -----Original Message-----
> > From: App_rpt-users [mailto:app_rpt-users-bounces at lists.allstarlink.org]
> > On Behalf Of George
> > Csahanin
> > Sent: Wednesday, April 10, 2019 10:37 PM
> > To: app_rpt-users at lists.allstarlink.org
> > Subject: [App_rpt-users] CHAN_PI
> >
> > Hey guys, looking at the source I see chan_pi...what is it. I knew at
> > one time but my aging grey matter can't find it.
> >
> > Reply off list if desired
> >
> > GeorgeC W2DB
> >
> > Allstar nodes 2360, 2428, 28599, 49089
> >
> >
> > --
> > George Csahanin
> > 10100 Carson Ranch Rd.
> > Crowley, TX 76036
> > 682-708-5716 home
> > 401-338-0568 cel
> >
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