On Thu, 6 Dec 2012 08:16:26 +0800 Xiaofan Chen <xiaofanc@xxxxxxxxx> wrote: > Interestingly you mentioned this article. Back in 2008, we have > some discussions about this topic in Microchip forum. > http://www.microchip.com/forums/tm.aspx?m=329799 My favorite search engine told me about it of course while i did my research :) Sadly no one posted some results of what he tried, but thanks for mentioning it. The biggest problem i noticed with PTP/IEEE1588 scheme is that it relies on the presumption that transmission delays are equal in both directions. This is probably way too optimistic for USB(?). OTOH it might not matter much depending on the precision needs. -- Kind regards/Mit freundlichen Grüßen, Stefan Tauner -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html