Hi If you want a 1588 PHY and are on a budget:
https://www.digikey.com/products/en/development-boards-kits-programmers/evaluation-boards-embedded-mcu-dsp/786?k=freescale+freedom&k=&pkeyword=freescale+freedom&pv47=24619&FV=ffe00312%2C7e80098&mnonly=0&newproducts=0&ColumnSort=0&page=1&quantity=0&ptm=0&fid=0&pageSize=25 Drop NTP into it and let it rip. Bob > On Feb 14, 2017, at 5:26 PM, Scott Stobbe <scott.j.sto...@gmail.com> wrote: > > Something like this would make a great NTP server. > https://www.digikey.com/products/en?keywords=P0286-ND > > Too bad they didn't include a PTP 1588 capable PHY... > > On Tue, Feb 14, 2017 at 12:33 PM, Chris Albertson <albertson.ch...@gmail.com >> wrote: > >> Here is a something that could work. It has a real serial port and you >> could add more ethernet controllers, uses very little power and cost only >> $60. >> www.newegg.com/.... >> <https://www.newegg.com/Product/Product.aspx?Item= >> N82E16813157497&cm_re=j1900-_-13-157-497-_-Product> >> >> There are other boards like this that use the same J1900 CPU. I'm >> thinking about using this as th machine tool (milling machine) controller. >> >> On Tue, Feb 14, 2017 at 4:26 AM, Bob Camp <kb...@n1k.org> wrote: >> >>> Hi >>> >>> A direct port might be a +/- 100 ns sort of thing most of the time and a >>> +/-10 us >>> thing every so often under some OS’s. Most desktop operating systems are >>> not >>> designed to prioritize random pin interrupts. A dirt cheap MCU coded with >>> a few >>> (hundred) lines of assembly code may be a better option than a typical >>> desktop. >>> Complicating this further is the degree to which some OS’s can be >> directly >>> or >>> indirectly optimized. Install *this* package and it all goes nuts. >> Install >>> that package >>> and not much happens …. >>> >>> Bob >>> >>>> On Feb 13, 2017, at 11:07 AM, Ruslan Nabioullin <rnabioul...@gmail.com >>> >>> wrote: >>>> >>>> Hi, generally speaking, what are the performance differences between >> the >>> following: 1. direct RS-232 (i.e., what I believe is a standard PCI card >>> offering RS-232---essentially UARTs interfaced more-or-less directly to >> the >>> PCI bus); 2. RS-232 via USB; 3. PPS decoding PCI cards (which might also >>> have an IRIG input or even an onboard GNSS receiver). >>>> >>>> Thanks in advance, >>>> Ruslan >>>> _______________________________________________ >>>> time-nuts mailing list -- time-nuts@febo.com >>>> To unsubscribe, go to https://www.febo.com/cgi-bin/ >>> mailman/listinfo/time-nuts >>>> and follow the instructions there. >>> >>> _______________________________________________ >>> time-nuts mailing list -- time-nuts@febo.com >>> To unsubscribe, go to https://www.febo.com/cgi-bin/ >>> mailman/listinfo/time-nuts >>> and follow the instructions there. >>> >> >> >> >> -- >> >> Chris Albertson >> Redondo Beach, California >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to https://www.febo.com/cgi-bin/ >> mailman/listinfo/time-nuts >> and follow the instructions there. >> > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.