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From: | Tomalak Geret'kal |
Subject: | Re: [gpsd-users] Blocked device when using ldattach |
Date: | Wed, 01 Feb 2012 11:17:36 +0000 |
User-agent: | Mozilla/5.0 (Windows NT 6.1; WOW64; rv:8.0) Gecko/20111105 Thunderbird/8.0 |
[reinjected into the list]
Why not let gpsd handle the PPS for you? PPS without knowledge of the current second is not very usefull anyway.That depends entirely on what you want to do with it. Using it as a reference for a time sync measurement, for example, doesn't need time of day at all, and that's what keeps all your telecom networks running.I understqnd why you want PPS data (telecom, etc) but why not let gpsd handle that for you?Handle what? A proprietary telecoms metric, that is calculated on an FPGA? No...I am baffled how you can have a proprietary FPGA attached to /dev/ttyS0 ??
/dev/ttyS0 has nothing to do with it. The PPS goes straight into the FPGA, while NMEA continues to stream over the serial link.
I just wanted to make the point that PPS has a whole wide range of uses, and not all of them require time-of-day at all. Timing is distinct from time.
Though, to answer your next question, no I can't think of a use for PPS going into the software stack (and thus potentially into gpsd) that doesn't involve time-of-day.
Tom
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