[time-nuts] Holdover, RTC for Pi as NTP GPS source
hmurray at megapathdsl.net
Thu Nov 2 01:12:57 EDT 2017
tpiepho at gmail.com said:
> Forget about accurate time from the RTC's registers. The slowness and
> variably in I2C is quite poor and most of them don't even have sub-second
> resolution when read or written.
If your RTC has a PPS output, you can read the registers to get the coarse
time, then wait for the PPS to tick to get the low order bits.
These are my opinions. I hate spam.
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