[ntp:questions] GPS clock for Linux
terje.mathisen at hda.hydro.com
Tue Sep 16 15:46:43 UTC 2008
Brian Utterback wrote:
> So, apparently not entirely useless. Using USB as a power source is
> getting to be highly popular. Witness the number of cup warmers, fan,
> etc. on the market. As long as you don't try to read the signal via USB,
> it should be okay.
> One thought occurs to me. Would it work to have the PPS signal go to a
> serial port but the actual NMEA sentences be read via USB? It seems to
> me if the total jitter of the USB still kept the snetences timing within
> half a second it would work.
Sure, that should work, except that if you do have a serial port to
receive the PPS signal on, using the same port for the rest of the
signal simply makes sense.
The USB-based GPSes all seem to be missing a dedicated PPS signal.
- <Terje.Mathisen at hda.hydro.com>
"almost all programming can be viewed as an exercise in caching"
More information about the questions