[time-nuts] I want a good micro-controller

Jim Palfreyman jim77742 at gmail.com
Wed Aug 13 06:05:31 UTC 2008


Bruce,

Yes that's exactly my plan. No GPS and designed for field use. A halfway
decent crystal with interpolation from 1 PPS timestamps should provide
decent results. And anything else I can dream up.

Bottom line is I need to know which micro-controller to embrace.

Thanks Didier for your suggestion. Any others?

Jim


2008/8/13 Bruce Griffiths <bruce.griffiths at xtra.co.nz>

> Jim Palfreyman wrote:
> > Hi Folks,
> >
> > Well I have a nice idea in my head for a lunar occultation timer.
> Basically
> > it's a normal clock that accepts a push button click and records the UTC
> of
> > the events. Multiple events can be recorded and displayed back. The time
> > must be settable and could also accept an external 1 PPS for accurate
> time
> > setting. It also needs to be portable and battery powered. When it does
> get
> > 1 PPS time setting it could work out how good its oscillator is an adjust
> > for it. etc. etc. and etc.
> >
> > I have lots of other ideas in my head too and it's about time I settled
> down
> > and thoroughly learned a decent micro controller. I want to pick one, get
> > the stuff I need and commit to it. I've had experience with Atmel
> AT90S2313
> > but really want something with more memory, a decent number of io pins
> and
> > I'd like to avoid assembler.
> >
> > It needs to drive a display of some form (standard LCD is fine but other
> > options would be good) and since nearly all my references are based on
> 10MHz
> > it would be nice if it could be clocked at that speed. I used to program
> the
> > Acorn Achimedes and so ARM would be nice and since I'm a 20 year
> experienced
> > C programmer (not C++) then that is what I'd like to program it in.
> >
> > Thoughts, ideas, comments would be appreciated!
> >
> > Oh and cheap!
> >
> > :-)
> >
> > Regards,
> >
> > Jim
> >
> Jim
>
> Is this intended for field use?
> If so, one has to remember that it will not always be easy or practical
> to set up a GPS receiver on site.
> Provision for using the timer as an interpolation device to interpolate
> between timestamps obtained before and after the event from a fixed
> location reliable GPS receiver would greatly enhance its usefulness.
> Sometimes its hard enough to setup and acquire the star or other object
> of interest without having to worry about a GPS receiver as well.
>
> Bruce
>
>
> Bruce
>
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