[time-nuts] Modern HW replacement for ATOM based NTP server?

Hal Murray hmurray at megapathdsl.net
Wed Apr 8 04:01:49 EDT 2015


attila at kinali.ch said:
> The biggest problem would be to get the data into ntp in the right way, as I
> am not sure whether ntp supports that kind of input.

If anybody ever needs help with ntp, feel free to poke me off list.

There are 2 ways to get data into ntp.
  You can implement the kernel PPS API which basically reads a pair of time 
stamps, one for when the signal changes from low to high and another for high 
to low.

  You can feed data in via the shared memory driver.  GPSD uses this.  Each 
sample needs 2 time stamps, one for what the time should be and the second 
for the OS/system time when the first time stamp arrived.


-- 
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