[Tinyos-devel] Re: [Tinyos Core WG] time sync interfaces

[David Gay]

On Dec 18, 2007 12:03 PM, John Griessen <john at ecosensory.com> wrote:
> I could only imagine a worthwhile HIL time sync if the hardware had a PLL oscillator
> that can be adjusted based on round trip tests as a system runs.  NO hardware has
> that yet, so a HIL wouldn't be worthwhile.

Surely that depends on what resolution timesync you think is
worthwhile? My assumption is that different apps have different
precision requirements, from second-level timesync down to
microsecond-level timesync. I'm fairly sure that second-level timesync
doesn't require an adjustable PLL oscillator ;-)

So the relevant question for a HIL is whether we can express a
sufficiently useful timesync on our current platforms, not whether we
can express the ultimate timesync.

David Gay