[LinuxPPS] [PATCHv2 6/6] pps: add parallel port PPS client

[Remco dB]

Alexander, 

This sounds very interesting! 

Does 'stand alone patchset' mean that if I apply 
the patch with (patch -p1 < [patch] on a 'fresh' kernel
source, after compilation etc etc  ntpd will sync to the 
PPS which is applied to the interrupt pin of the LPT?

Do I need to recompile ntpd (for e.g. nano precision) ? 

Regards, 

Remco 


On Wednesday 24 February 2010 13:28:17 Alexander Gordeev wrote:
> Add parallel port PPS client. It uses a standard method for capturing
> timestamps for assert edge transitions: getting a timestamp soon after
> an interrupt has happened. This is not a very precise source of time
> information due to interrupt handling delays. However, timestamps for
> clear edge transitions are much more precise because the interrupt
> handler continuously polls hardware port until the transition is done.
> Hardware port operations require only about 1us so the maximum error
> should not exceed this value. This was my primary goal when developing
> this client.
>