El 05/04/2012 12:20, Azelio Boriani escribió:
On a side note, speaking of deterministic systems, why has no one built a
GPSDO with an FPGA yet? Or an NTP server? :)
Oh, I've done that (an NTP server, not GPSO) in a Cyclone III FPGA. But
well... it has a Nios-II CPU and runs Linux, so I suppose it does not
count too much :). A pure FPGA (without CPU) NTP server would be very
fun, but I suppose that the development effort required would not worth
it, taking into account that implementing a true ntp in an embedded
linux is quite easy. I have recently put into work an application that
reads and writes UDP packets for a relatively high speed (280Mbps)
ethernet to ECSS-E-ST-50-01C TM transfer frames gateway. The Ethernet
part was quite easy to implement (the RAM-based FIFOs and flow and error
control were a bit more difficult, since you must have a continous
uninterrupted 280Mbps output, and the input is Ethernet - with extremely
variable latencies).
Regards,
Javier
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