Yes, that makes perfect sense.  I think with a scheme like this you could
easily implement up to 1000's of stored datapoints very easily (with the
proper EEPROM of course).

Thanks again.

Dan


> > Does the newest datapoint *have* to be in location 10? If
> not, then you
> could just keep an index that pointed to the current memory
> location, and
> have it wrap back to 0. something like:
>
>         index = 0;
>         while (recording)
>         {
>                 WriteMemory(index, measurement)
>                 (index^9)?index++:index=0;
> //increment index,
> but wrap to zero if index==9
>         }
>
>
>         where WriteMemory() is whatever function you use to
> store your data
> that specifies address and measurement to store. I guess you
> get the idea.
> You can re-read the data newest to oldest just by knowing the value of
> <index>, since that was the last address you stored. when
> re-reading, you
> would just have to decrement the index, and wrap from 0 to 9. Same
> principle, though.
>
> hope that makes sense
>
> > -----Original Message-----
> > From: Mccauley, Daniel H [mailto:daniel.h.mccauley@LMCO.COM]
> > Sent: Friday, May 16, 2003 10:22 AM
> > To: PICLIST@MITVMA.MIT.EDU
> > Subject: [PIC]: Storing 10 Sets of Data to EEPROM and performing
> > revolving updates ? ? ?
> >
> >
> > For my project I wish to do the following:
> >
> > For each measurement I take with this electronic timing
> device (my PIC
> > controlled device), I want to store the result as following:
> >
> > Measurement 1 - Result 1
> >
> > For the next measurement, the data would be stored in:
> >
> > Measurement 2 - Result 2
> >
> > This would go so on until 10 Results are stored.  Since I am
> > only storing 10
> > results, for the 11th measurement, I want to discard the oldest
> > datapoint and store the new datapoint at location Result 10.
> >
> > So basically I'm only storing the last 10 Results and always
> > dropping the
> > oldest to allow room for the newest result.
> >
> > My question is, what is the best way to code this??? (I'm
> using CCS C
> > compiler)  Do I move actual data through EEPROM everytime
> > the 11th, 12th, so on results are being stored, or is it
> > better to change
> > the actual EEPROM storage address.
> >
> > Any help appreciated!!!
> >
> > D
> >
> > --
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> >
>
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