On 28/01/2013 8:54 AM, Marc Lavallée wrote:
There's a better solution that NTP (with some analog trick):
http://en.wikipedia.org/wiki/Precision_Time_Protocol
Further to this, note that AVB, IEEE 802.1AS - "Precise synchronization"
is a according to Wikipedia "a very tightly-constrained subset of"
IEE1588 PTP that you mention.
http://en.wikipedia.org/wiki/Audio_Video_Bridging
Via some miracle of the open web, IEEE make the IEEE 802.1AS spec
available for free:
http://standards.ieee.org/findstds/standard/802.1AS-2011.html
It works on a properly configured multicast network with UDP packets,
for example on a private Wifi network, so no special hardware
is required. Here's two free implementations for Linux:
http://ptpd.sourceforge.net/
http://linuxptp.sourceforge.net/
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