[time-nuts] FPGA GPSDO (Was: Re: NTP jitter with Linux)

Chris Albertson albertson.chris at gmail.com
Sat Apr 7 05:53:51 UTC 2012


On Fri, Apr 6, 2012 at 9:41 PM, Andrew Rodland <andrew at cleverdomain.org> wrote:

> Another option would be building something on an FPGA. This would be a
> considerable stretch for me, since I've never done FPGA work, but if I build
> from the ground up, I can have *very* tight control over things that are chosen
> for me with a micro controller.


A compromise is to find a "soft core" for the FPGA.  This is a CPU
implemented in FPGA and then it runs software just like a "real" CPU.
 This would let you move your micro controller based be sign over to
the FPGA quickly.   After that you can implement some specialized
peripherals that do time stamping


How does the performance of the Arduino based NTP compare with what
you could do with Linux on (say) and Atom or ARM processor?




Chris Albertson
Redondo Beach, California



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