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

[Azelio Boriani]

The Xilinx and Altera have their embedded CPUs (Microblaze and Nios) IP.
I'm not familiar with them and don't know how much they cost. Until now I
have developed on Xilinx 50Kgates FPGA and 128 cells CPLD with the Xilinx's
free tools.

On Sat, Apr 7, 2012 at 7:53 AM, Chris Albertson
<albertson.chris at gmail.com>wrote:

> 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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