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---+ Lose the per-driver PPS code Dave wants to lose the per-driver PPS code and let the ATOM driver handle it all. Let's use this topic to discuss issues about this set of bugs. <div style="float:left;padding-right:1em"> | *What* | *Status* | | Master | %BUG{557}% | | arbiter | (seems OK) | | as2201 | (seems OK) | | hpgps | (seems OK) | | jupiter | %BUG{560}% | | msfees | %BUG{561}% | | mx4200 | %BUG{562}% | | nmea | %BUG{563}% | | oncore | %BUG{559}% | | parse | %BUG{558}% | | ripencc | %BUG{564}% | | trak | %BUG{565}% | | true | %BUG{566}% | | zyfer | %BUG{567}% | </div> --- --- Harlan: Do the remarks "seems OK" mean - OK as they do not use any of the PPSAPI? -- Users.FrankKardel - 01 Feb 2006 --- Yes, it means that I did a =grep PPS refclock*.c= and the ones marked "seems OK" only discussed PPS in their comments. -- Users.HarlanStenn - 01 Feb 2006 --- --- The thing is that the refclock drivers know exactly whether the PPS of the device they are controlling is valid by the information from the device itself. ATOM/PPS must use PPS derived time stamps only when the clock is doing well. ATOM/PPS has currently no way whatsoever to know about the health state of PPS (I currently see a 500ppm frequency check) - it assumes that PPS is always valid when it is there. We have seen refclock/network scenarios where knowing whether PPS is healthy was absolutely crucial (effect: oscillating clock setting of several 100ms). The scenario was invalid PPS information from a PPS source and valid time time information from the network. For ATOM/PPS we would need an interface where the PPS health information is available to ATOM/PPS. Currently this task is managed in the refclock drivers (some better, some worse). -- Users.FrankKardel - 01 Feb 2006 ---
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Topic revision: r5 - 2006-02-01 - 13:38:05 -
SteveKostecke
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