An interesting idea.  I'll see if it makes an improvement.

    Steve


Craig Hughes wrote:
On Feb 3, 2007, at 9:07 AM, Steven A. Falco wrote:

  
In my
implementation, the PPS output of the ublox is wired to the pw1 GPIO.
I've configured that GPIO as an interrupt, which is what the pxa  
serial
kernel driver uses to report PPS events to ntpd.
    

Sounds like a perfect application to test the RT stuff I just pushed  
into the buildroot!  How about cranking the priority on the PPS  
response ISR, and see if your jitter gets pushed even lower!

C

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