I think the only solution is to put the correction value in by hand. On Fri, Jun 8, 2012 at 3:45 AM, k4...@aol.com <k4...@aol.com> wrote:
> Mike, > The problem with your solution is that the receiver can get an error in > calculating the year value and if it writes a number greater than it > actually is into eeprom, the next time it powers on it will be forced to go > forward 19 years in time. And since it is not allowed to go backwards in > time, it will always have the wrong date. I have worked with many software > engineers doing GPS receiver design, believe me, there is no fool proof > solution to this. > Doug, K4CLE > > Connected by DROID on Verizon Wireless > > > -----Original message----- > From: Mike S <mi...@flatsurface.com> > To: time-nuts@febo.com > Sent: Fri, Jun 8, 2012 00:51:21 GMT+00:00 > Subject: Re: [time-nuts] Thunderbolt GPS rollover > > On 6/7/2012 8:02 PM, Bob Camp wrote: > >> One could put in a routine that looks at the date the software was >> written and "fix" any date that shows up as being in the past. >> > > After all the issues seen after the last rollover, I'd think > receiverswould have been made robust against this. > > One obvious method would be to keep a checkpoint date (or 1024 weekcycle # > + week offset) in EEPROM. To avoid issues with using up EEPROMr/w cycles, > only update it anytime the currently received date is morethan a year > beyond the currently stored date. > > > ______________________________**_________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/** > mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> > and follow the instructions there. > > ______________________________**_________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/** > mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.