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| author | Eric S. Raymond <esr@thyrsus.com> | 2013-11-28 05:56:52 -0500 |
|---|---|---|
| committer | Eric S. Raymond <esr@thyrsus.com> | 2013-11-28 05:56:52 -0500 |
| commit | a55054c6947583ec6ebf249ab23cea87fccf70ee (patch) | |
| tree | eca9b66ecc27fb16c91304731b4dc25480e8760e /www | |
| parent | 13d09e95001eed5cd5c667c8c8cb11ea8bb90219 (diff) | |
| download | gpsd-a55054c6947583ec6ebf249ab23cea87fccf70ee.tar.gz | |
REmove some future-feature ideas that are done or obsolete.
Diffstat (limited to 'www')
| -rw-r--r-- | www/hacking.html.in | 18 |
1 files changed, 0 insertions, 18 deletions
diff --git a/www/hacking.html.in b/www/hacking.html.in index 14fc343f..9b95f497 100644 --- a/www/hacking.html.in +++ b/www/hacking.html.in @@ -130,7 +130,6 @@ file in the source distribution.</p> <li><a href="#oncepercycle">Reporting fix data only once per cycle</a></li> <li><a href="#shipstrings">Allowing clients to ship arbitrary control strings to a GPS</a></li> <li><a href="#fifo">Setting FIFO threshold to 1 to reduce jitter in serial-message times</a></li> - <li><a href="#utc-tai">Stop using a compiled-in UTC-TAI offset</a></li> <li><a href="#subsecond">Subsecond polling</a></li> </ol></li> <li><a href="#release">Release Checklist</a></li> @@ -1332,7 +1331,6 @@ exploit that in the future.</p> discussion:</p> <pre> -?A .. ?Z -> map to the original A..Z gpsd commands ?almanac -> poll the almanac from the receiver ?ephemeris -> poll the ephemeris from the receiver ?assist -> load assistance data (time, position, etc) into the receiver @@ -1379,22 +1377,6 @@ jitter.</p> expert, reckons that at 4800bps the UART buffering can cause at most about 15msec of jitter. This is, observably, swamped by other less controllable sources of variation.</p> - -<h2 id="utc-tai">Stop using a compiled-in UTC-TAI offset</h2> - -<p>Instead, from the hotplug script, we could maintain a local offset file:</p> - -<ol> -<li>If there is no local offset file, download the current leap-second -offset from <a href='http://hpiers.obspm.fr/iers/bul/bulc/'>IERS</a> -or <a href="ftp://maia.usno.navy.mil/ser7/tai-utc.dat">the U.S. Naval -Observatory</a> and copy it to a local offset file</li> - -<li>If there is a local offset file, consider it stale after five -months and reload it.</li> - -<li>gpsd should read the local offset file when it starts up, if -it exists.</li> </ol> <p>However, it turns out this is only an issue for EverMore chips. SiRF GPSes |