On Wed, 26 Mar 2014 17:40:07 -0700 Chris Albertson <[email protected]> wrote:
> On Wed, Mar 26, 2014 at 2:51 PM, Henry Hallam > <[email protected]>wrote: > > > Hi Gabs, > > > > I have a Z3805A and a Beaglebone, and would like to set up an NTP > > server for the lab. Any kernel drivers and/or setup hints would be > > appreciated :) > > > > It's best to go in steps. Resist the temptation to simply connect > everything, turn it on and see it is works. > > The first step is to get NTP installed and running using Internet pool > servers for reference clocks. Make sure this is working reliably. > NTP may already be mostly configured. I don't know. > > Next make sure the kernel level PPS diver is working. To test PPS > there is a user-land test program you can run that simply prints the > time of each pulse to the console. Besure to watch both the voltage > levels (the Beagle is 3.3 volts) and the polarity of the pulse. If > you get the polarity wrong it will appear t work but the timing will > lag by the pulse width (because the falling edge is now the raising > edge.) Be sure and match up the levels for both serial and PPS. > > After both of the above, adding a GPS based reference clock to NTP is > easy. All you do is edit the config file. Obviously I've left out > much detail but the biggest thing is to follow the step by step > process Job number one on the Beaglebone Black (and I assume the regular version) is to install NTP. Otherwise it doesn't even know the date. It has no battery for RTC. Beyond that, I haven't found a very clear way to get the gpio-pps going. _______________________________________________ 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.
