Sorry, didn't mean to send this twice. Mark
On Mon, 2007-12-24 at 09:19 -0500, Mark Phillips wrote: > You have to patch the kernel with the NTP patches rather than with gpsd > patches. > > Get the kernel patches here > ftp://ftp.kernel.org/pub/linux/daemons/ntp/PPS/ > > And a vague howto here http://etienne.favey.ch/ntp/ > > Thanks for looking at this. > > Mark > > On Mon, 2007-12-24 at 09:27 +0800, Kim-man 'Punky' TSE wrote: > > Hi , > > > > But where can I get the 1PPS patch for Linux and instruction? As far as > > I read gpsd documentation, it indeed support 1PPS as long as you have > > the proper equipment. > > > > What is the different between gpsd support for 1PPS and the 1PPS patch > > for the time server? > > > > Regards, > > Punky > > > > Mark Phillips wrote: > > > Any thoughts/comments on this Punky? > > > > > > > > > > > > On Mon, 2007-12-10 at 14:33 -0500, Mark Phillips wrote: > > > > > >> I have mine setup in a similar way but it is not a true time server in > > >> that because of the lack of a disciplining kick on a regular basis it is > > >> able to drift between time updates. > > >> > > >> The problem with NMEA time strings is that they tend to come in a > > >> cluster and not at all every second or 3 seconds or 5 seconds. They come > > >> along whenever the GPS processor has time to spit them out. > > >> > > >> The 1PPS pulse from the GPS system is not derived from the decoded data > > >> but rather is an inherant component of the GPS signal along with the > > >> 10KHz pulse and thus is more reliable. > > >> > > >> I'd still like to see a 1PPS patched kernel particularly as it would > > >> then allow for connections to things like Frequency Standards and LORAN > > >> RX's etc. Heck, one could even connect it up to the mains after a very > > >> simple signal divider (trick used on clock radios etc) is added. > > >> > > >> Mark > > >> > > >> On Thu, 2007-12-06 at 19:24 +0800, Kim-man 'Punky' TSE wrote: > > >> > > >>> Hi guys, > > >>> > > >>> Forget to mention, I have setup voyage attached to Garmin GPS18/USB and > > >>> get NTP time sync'd. Of course, this device is not PPS-capable, but it > > >>> works without any patch to the kernel and NTP daemon. See my blog > > >>> article: > > >>> > > >>> http://www.punknix.com/?q=node/116 > > >>> > > >>> Regards, > > >>> Punky > > >>> > > >>> Mark Phillips wrote: > > >>> > > >>>> Now I think about it, updating the gpsd package would also be useful > > >>>> for > > >>>> this purpose. > > >>>> > > >>>> FYI, my NTP server is running Voyage on a Neoware N3000 thin client > > >>>> (ebay $20). It has a 300MHz via processor in it as well as an IDE > > >>>> interface which is now running a CF card. The GPS RX plugs into ttyS0 > > >>>> and I'm running gpspipe on ttyS1 to allow my Nixie tube clock to > > >>>> correct > > >>>> itself. > > >>>> > > >>>> Mark > > >>>> > > >>>> On Fri, 2007-11-30 at 05:10 +0000, Clark wrote: > > >>>> > > >>>> > > >>>>> Mark Phillips <[EMAIL PROTECTED]> writes: > > >>>>> > > >>>>> > > >>>>> > > >>>>>> Hi all, > > >>>>>> > > >>>>>> Is there anywhere that I can register a feature request for adding > > >>>>>> PPS > > >>>>>> to the kernel for use in NTP apps? This would be really handy I > > >>>>>> think. > > >>>>>> > > >>>>>> Thanks > > >>>>>> > > >>>>>> Mark > > >>>>>> > > >>>>>> > > >>>>>> > > >>>>> I would really like that too! > > >>>>> > > >>>>> I have been using Voyage to try to create an NTP appliance 'cause the > > >>>>> commercial ones are WAY beyond my budget! > > >>>>> > > >>>>> I appreciate the work on Voyage so far! > > >>>>> > > >>>>> Thanks! > > >>>>> > > >>>>> > > >>>>> _______________________________________________ > > >>>>> Voyage-linux mailing list > > >>>>> [email protected] > > >>>>> http://list.voyage.hk/mailman/listinfo/voyage-linux > > >>>>> > > >>>>> > > >>> > > > > -- Mark Phillips, G7LTT/NI2O Randolph, NJ _______________________________________________ Voyage-linux mailing list [email protected] http://list.voyage.hk/mailman/listinfo/voyage-linux
