Mark Jessop lenniethelemming at gmail.com
Mon Dec 18 20:35:26 AEDT 2017

Given the cost of boards like the Raspberry Pi Zero, and other similar
boards, I don't see it being targeted at ARM-NEON being that big of a deal.

I guess a good product to complement the modem would be a 'shield' (or hat,
or cape, or whatever the kids call them nowadays), for a raspberry pi or
similar, that includes:
- An Audio codec chip (probably via I2S? Example DAC board here, but no
- PTT interface (relay? FET?)
- Maybe even a GPS unit? (Something like a uBlox MAX-8 would go nicely)

Of course you can do a lot of this with a USB sound card and some external
circuitry, but I like the idea of a self-contained unit that you could
mount in a small box.

I might look into parts for such a board over the holidays, if I'm not too
busy chasing balloons at Mt Gambier...

Mark VK5QI

On Mon, Dec 18, 2017 at 1:22 PM, Glen English VK1XX <
glenlist at pacificmedia.com.au> wrote:

> Matthew Cook asked me about the hardware and STM32 :
> STM32F7 MIGHT run the decoder, for narrow bandwidth search windows and
> slightly higher SNR requirements (+1 dB say) . The search algorithm is
> intensive and the LDPC decoder is hard work, also. But there is a nice
> vernier control on the "how hard it tries" to control CPU usage.
> STM32-anything will definitely run the encoder (lots of LUTs in FLASH)
> (it already is implemented on STM32L151 back in 2014)
> talk soon when I am not so flat out
> cheers
> _______________________________________________
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> OZAPRS at aprs.net.au
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