Re: [Linuxptp-users] Inexpensive ARM board for a PTP server (using GPS PPS)?
PTP IEEE 1588 stack for Linux
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From: Richard H. <pl...@gm...> - 2019-02-06 05:39:01
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> I have a GPS 1PPS signal available and would like to use it to > distribute time across my home network. The more accurate the better. > > GPS ----> single-board computer ------> several PTP client hosts > 1PPS ethernet > > I see that the TI AM355x boards like the Beaglebone Black have an > ethernet driver with hardware timestamp support, but I also found > some references on this mailing list to a silicon bug affecting the PTP > clock? Assuming that's still the case, what limitations does it > impose? > > I haven't procured any hardware yet. Is there another animal- or > fruit-board SBC with better PTP support that I should be looking at? > > If I do go with the Beaglebone, will a recent mainline kernel get me > everything I need (current PTP drivers, PPS input on a GPIO pin)? > > Thanks, > Mark Bear in mind Mark that PPS-in via GPIO might not give great results - far too much jitter & latency. Some hardware (eg iMX6 boards I have used ) allows PPS-In to be connected directly to dedicated registers which I found to work well. (The standard kernel driver needs extensive rework to do this however) _______________________________________________ Linuxptp-users mailing list Lin...@li... https://lists.sourceforge.net/lists/listinfo/linuxptp-users |