In message <007d01c4c37e$17e8e0d0$0301a8c0 at chuck2> you wrote:
>
> So maybe, are you thinking that a power fail interrupt is a waste of
> time? Just segment the file system as you suggested and trust the
> writeable part to jffs2?
A PF interrupt can be extremely useful - if it leaves you enough time
to do the things you want to do. If all you got is 50 or 100
milliseconfs then you have little chance to avoid problems with a CF
card that is being written to. In such a case you must design your
system such that it is robust enough even without such cleanup.
> Another technique that has fallen out of favor but is still useful in some
> applications is battery backed RAM. It's relatively expensive, but if
> you want fast non-volatile memory it can't be beat.
It depends. Sometimes you may have a battery, and the power fail
signal is just a warning that leaves you enough time for an orderly
shutdown.
Best regards,
Wolfgang Denk
--
See us @ Embedded/Electronica Munich, Nov 09 - 12, Hall A.6 Booth 513
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Humans do claim a great deal for that particular emotion (love).
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