Alan
the way it is written, it is reliant on a single core performance.
The way to get it running on multi core ARMs is that you will need to
break up the GRU matrix functions in nnet.c into separate threads.
specifically the functions in nnet.c that call functions in vec.c (or
sse_vec or avx vec etc)
IE parallelize the operations. My guess is on your N2 platform, maybe 4
threads CPU affinity locked on the 4 x A75 would do it, without using neon.
It may be worthwhile to look at the transcendentals, also, (exponent)
-glen
On 21/07/2020 09:33, Al Beard wrote:
Hi Glen,
The question is for me, how close are we to getting Mode 2020
running on a top-end Pi, Odroid XX etc.?
As it stands now, Mode 700D runs well on almost any Pi. And putting
one in a small box with USB peripherals is not a problem really.
Alan VK2ZIW
On Tue, 21 Jul 2020 08:27:08 +1000, Glen English wrote
I need some comments to drive decisions on part choices for the SM30000
My focus is on accessability- being affordable.
Having said that a few dollars saved is poor savings if the new box
cannot meet our forseeable objectives.
The original project leaders are not providing any opinions, maybe
they are burned out. Volunteers get that way.
The original SM1000 had a BOM (bill of materials) of about US$44
(quantity 100) + enclosure and packing. Setup costs for small
PCB runs and small metal work runs are very high compared to the
cost of the job. The Sm1000 used commodity components, nothing
special so it was able to be made in a simple factory.
The SM3000 is not going to be such a simple beast.
My estimate right now is the digital PCB would be approx USD52 or USD60
The analog interface mezzanine PCB (to provide SM1000 functionality)
would be another USD20 (mostly connectors and large passives)
The digital radio mezzanine PCB (HF + 28 MHz IF 1mW radio (capable
of direct aliasing to 200 MHz) 16 bit DAC , low noise clocks, will
be around USD100 if it is high performance.
My questions- Was the Sm1000 a good idea- how many people used them
as intended ?
did anyone use it with the internal speaker-mic, or should that be a
standard headset 3.5mm jack for connection to whatever ?
Total size of the digital PCB is probably around maybe 50mm x 80mm I
guess. If it goes into an existing SM1000 box, the audio board
would become the baseboard, and support all the connectors and
the digital PCB would be the piggyback. IE whole digital radio in
the SM1000 existing case (but not much use withotu connectors ) !
-glen
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Alan VK2ZIW
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Glen English
RF Communications and Electronics Engineer
CORTEX RF
&
Pacific Media Technologies Pty Ltd
ABN 40 075 532 008
PO Box 5231 Lyneham ACT 2602, Australia.
au mobile : +61 (0)418 975077
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