Steven,

Besides the fact that it would need a channel driver written to support it, unless it was a produced product it would not be used widely enough to warrant the time spend developing it. The USB interface on the other hand is universal and works across all platforms or at least it is suppose to. It has worked well on the PC and on the BBB but the RPi not so well. The reason it works better on some platforms and not others is sometimes in the HW but more often in the kernel support. It takes awhile for the SW on new boards to mature and some Linux flavors are more aggressive about kernel updates than others and there have been lots of USB fixes in late ARM kernels. While experimenting with things is fine the problem comes in when trying to sell it to the troops. USB is simple and if cost is a factor it would be a whole lot easier to just modify a USB FOB and use a platform where it works.

73 Doug
WA3DSP
http://www.crompton.com/hamradio

Date: Sun, 8 Feb 2015 16:20:23 +0000
From: steve@donegan.org
To: App_rpt-users@ohnosec.org
Subject: [App_rpt-users] URI

It seems to me that a Wolfson audio board (on a Pi or Pi interface compatible) and bringing out some GPIO pins would potentially replace a USB URI like the DMK - has anyone tried doing something like this?

____________
Steven Donegan
KK6IVC FCC General Class License
SSCC/NORC Life Member, Car #86
www.sscc.us

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