Hi! On 24/11/2011, at 15:16, Bob Camp <li...@rtty.us> wrote:
> Hi > > How about simply adding 1 ms every other second? You could then fine tune it > by picking a small number of seconds to not add a ms to. > An idea but I am searching for a more global and elegant solution. In fact, after reading about PLL (as someone suggested) I noticed that my algorithm is a simple PLL. Cheers, Miguel > Bob > > > > On Nov 24, 2011, at 7:16 AM, Javier Herrero <jherr...@hvsistemas.es> wrote: > >> El 24/11/2011 13:56, Miguel Gonçalves escribió: >>> >>> >>> Right! That is what I am doing. >>> >>> The problem is the drift between adjustments. Arduino's clock is slow 25 ms >>> every minute and if temperature changes it will surely be different. >>> >>> >> That is more than 400ppm error, that sounds quite high. Is the clock >> frequency of the Arduino so drifted? I would try first to check (and correct >> a bit) the source of that error. If the crystal frequency is ok, perhaps >> there is an error in the programming of the timer that generates the timing >> interrupt. >> >> Regards, >> >> Javier >> >> >> _______________________________________________ >> 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. > > _______________________________________________ > 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. _______________________________________________ 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.
