[ntp:questions] Why do the nmea and pps drivers differ regarding the default for flag2?

Doug Calvert dfc-list at douglasfcalvert.net
Wed Oct 26 04:07:32 UTC 2011


Hello,

  Why do the nmea and pps drivers differ regarding the default for 
flag2? How would a user know which is appropriate?

> PPS(22):
> flag2 0 | 1
> Specifies PPS capture on the rising (assert) pulse edge if 0; falling (clear)
> edge if 1. (default), 1 for clear.

> NMEA(20):
> flag2 0 | 1
> If PPS signal processing is enabled, capture the pulse on the rising edge if 0
> (default); capture on the falling edge if 1.







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