[En-Nut-Discussion] Time sync below mSecond

Alexander Baranov baranov at intech21.com
Mon Jul 17 14:01:29 CEST 2006

I use timers not used by NutOS for getting microseconds intervals. For 
example Timer3.
----- Original Message ----- 
From: "ivesworking" <ivesworking at hotmail.com>
To: <wbasser at cyberinteg.com>; "Ethernut User Chat (English)" 
<en-nut-discussion at egnite.de>
Sent: Saturday, July 15, 2006 9:01 PM
Subject: [En-Nut-Discussion] Time sync below mSecond

>i know we can use NutGetMillis to operate the system in milisecond 
> just wonder can we improve this to micro second ? (maybe .1ms if 
> microsecond is impossible)
> i conduct a new academic research on time sensitive network control 
> application,
> i studying on the possibility on sync all the network capable mcu on the 
> network in a sub milisecond range.
> (the network device might have distant upto hundred miles)
> the sntp on ethernut i believe in second(not confirm)
> according to rfc the best implementation can upto 200ps,
> but according to network delay and condition, someone say the best 
> particle result is around 10-20ms,
> just want to ask, did anyone able to perform time sync on below second 
> scale.
> the RFC also state the time sync also depends on the hardware pll clock.
> i not sure how well are ethernut, but before enter implementation stage, 
> just want to ask what is the best possible result i can get.
> wfloh
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