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

[David Gay]

On Dec 18, 2007 2:03 PM, John Griessen <john at ecosensory.com> wrote:
> David Gay wrote:
>
> > 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 ;-)
>
> OK.  Yes, a .1 second resolution HIL module would be a go...
> and yes that is more useful than systems out of sync by half a second...
>
> Any chance we have of using the most deterministic delays coming from the hardware
> we should take it is all I meant.
>
> What time accuracy do you call a useful timesync on our current platforms?

Well I was asking that question too, actually ;-) I'm not an
application developper/expert, so I can't really answer.

David
PS: I suspect with reasonable evidence that millisecond level timesync
is practical.