[arm-allstar] GPIO pin release?

[David McGough]

Hi Iain & everyone,

If a cape were designed to support radio applications, I think bypassing
the need for USB audio entirely would be the best plan. The BBB processor
already contains some very capable audio hardware. However, it doesn't
have a DAC. The output audio is in a serialized, digital format (I2S).
More hardware (e.g.:  http://www.ti.com/product/tlv320aic3106 ) is
required to convert this digital data into analog audio. This is how the
existing audio cape that CircuitCo designed works.

Before even starting down this path, we need software to make this
solution work with the AllStar codebase. An existing CircuitCo-style audio
cape could be used for the software development and I've already done some 
poking at this in a very preliminary way--BBB GPIO capability is the 
first step, however, and is at the top of my "hobby software" priority 
list. More developers would be welcomed!

Here is a link to the audio cape on Mouser's site:  
http://www.mouser.com/ProductDetail/BeagleBoard-by-CircuitCo/BB-BONE-AUDI-01/?qs=sGAEpiMZZMv8qfsbmFratNChH0bvHn5A

These little BBB's sure have some huge potential!!!!


73, David KB4FXC




On Fri, 11 Jul 2014, iain macdonnell - N6ML wrote:

> I've been thinking that it'd be neat if someone could come up with a
> "cape" for the BBB that has the USB audio and plumbing for GPIO into a
> single connector - basically a URI in cape form, but using the "free"
> GPIO and a "cheap" USB audio interface....
> 
> 73,
> 
>     ~iain / N6ML
> 
> 
> On Fri, Jul 11, 2014 at 5:53 AM, Kevin Custer <kuggie at kuggie.com> wrote:
> > On 7/11/2014 7:39 AM, nx4y at verizon.net wrote:
> >
> > Any idea when the GPIO pins will be supported for COS/PTT ? I got a node
> > working fine with a DMK USB interface, but it's too big and I want to use a
> > generic fob.. but I don't relish slicing my hand open again trying to get it
> > open and then soldering too-big parts to too-small pads !
> >
> >
> >
> > Chuck Kelsey - WB2EDV has made some PC Boards that allow any of 3 popular
> > FOB's to be mounted, along with the necessary support components, to make an
> > inexpensive radio interface.  The StarTech ICUSBAUDIO, and two different
> > SYBA USB sound device styles were chosen for Chuck's board, all of which are
> > known to come with leaded C-Media chips 100% of the time.  I have quickly
> > put a page up this morning to show some photos of Chuck's board and the
> > three supported sound devices.  I'm sorry that I don't have any pictures of
> > the board with the FOB's attached, yet:
> >
> > http://www.repeater-builder.com/projects/fob/startech-syba-fob.html
> >
> > If anyone is interested in any of these boards, you may consider contacting
> > Chuck from the link at the bottom of the referenced page.
> >
> > Kevin - WJ8G
> >
> >
> >
> > _______________________________________________
> >
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> > arm-allstar at hamvoip.org
> > http://lists.hamvoip.org/cgi-bin/mailman/listinfo/arm-allstar
> >
> > Visit the BBB web page -
> > http://www.crompton.com/hamradio/BeagleBoneBlackAllstar/
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> 
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> 
> Visit the BBB web page - http://www.crompton.com/hamradio/BeagleBoneBlackAllstar/
>