The data is encoded by how long you leave it running between reset.
Typically when reseting, a person doesn't press the reset button multiple
times with 1/4 to 3/4 of a second spacing (unless they're taking anger out
on the chip, in which case they deserve to mess up its programming ^_^).

-Aaron

> I've been following this thread with interest, a bootloader that just uses
> MCLR is very appealing.  However, I can't see how the bootloader would
> differentiate a valid reset (from e.g. a rest button or supervisor) from a
> bootloading attempt.  If you have to use another pin to test for "run" or
> "bootloader" mode, then the whole thing seems a little pointless
> and you may
> as well use an existing loader.  Of course it's more than likely
> I'm missing
> something blatantly obvious.
>
> Cheers
>
> Mike

--
http://www.piclist.com hint: To leave the PICList
mailto:piclist-unsubscribe-request@mitvma.mit.edu