On 02/24/2012 12:56 PM, Peter Bigot wrote:
> My point is that there is value in re-using the POSIX API including struct
> timeval and gettimeofday/settimeofday, which have commonly understood and
> documented semantics, rather than inventing a new

On 02/24/2012 11:36 AM, Mark Rages wrote:
 > This makes no sense... you are comparing a crystal spec to a POSIX API
 > call?  gettimeofday() will have the same accuracy as the underlying
 > system clock, no?

I've been wondering for a long time, (without doing any experiments), if
precision time protocol, (PTP), could be implemented using some deterministic
output of the radio chip as packets arrive, and linking that time of arrival, 
(TOA),
to the particular packet as they arrive.  You would not save all these local 
timestamps,
just TOAs that matched a PTP synchronization packet.  anyone familiar enough 
with
radio details to know which radio chip(s) would allow that?

John Griessen
-- 
Ecosensory

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