Hi Since time stamping hardware does exist for 1588, why not simply put the effort into folding that into NTP? Then you have a “generic” solution that addresses a lot of the ambiguity a wide range of cases. It shows up in many of the low end micro’s so it’s not just a “big box only” solution. It’s not a 100% solution (NTP is not 1588) but it gets rid of a lot of noise.
Bob > On Oct 25, 2017, at 8:53 PM, Nick Sayer via time-nuts <[email protected]> > wrote: > > I’ve just completed a project (off topic) with the ATSAMS70 chip and learned > a lot in a relatively short time, and I really like the result. > > I am considering a new project based on its cousin, the ATSAME70. The E70 has > an Ethernet 10/100 MAC built in as well as the rest of the stuff the S70 has > (USARTs, SD/MMC, AES-256, TRNG, high-speed USB… it’s quite nice), and Atmel > Start (the software development framework I’ve been using) purports to have a > ready-to-use IP stack (alas, no IPv6, but it’s a starting point at least). > > Where I am going with this is I am considering designing a precision embedded > NTP/PTP server. I’d connect one of the SkyTraq modules I’ve got piles of up > to a GPIO and USART and the Ethernet port would provide NTP/PTP. The idea > behind making it an embedded system would be to try and make it as accurate > as it reasonably can be with the hope that (at least on the local segment) it > would wind up being more accurate than a Pi Zero doing the same thing. At the > very least, you’d expect such a thing to be a whole lot less hassle to set > up, given decent firmware. > > This may be a fool’s errand, certainly, but looking at it from here, I would > think that such a design might offer accuracy in the microsecond range, but > that’s just a tremendously uninformed guess at this point (and what does that > accuracy mean to a peer that might itself be incapable of better than 2 > orders of magnitude coarser?). > > Anybody have any ideas or suggestions along these lines? > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
