[OpenTRV-dev] AVR (328P) EEPROM puzzler

[Bo Herrmannsen]

And some of those forum members are so lazy that without no code they
simply go to the next post

Lazy might be the wrong word but it was the best i could figure on this
side of noon

2016-03-20 11:42 GMT+01:00 Damon Hart-Davis <dhd at exnet.com>:

> Before posting links to code I wanted to see if there was any interest, or
> knowledge of similar behaviour elsewhere.
>
> It’s a small piece of code in a big system.
>
> Rgds
>
> Damon
>
>
> > On 20 Mar 2016, at 10:38, Bo Herrmannsen <bo.herrmannsen at gmail.com>
> wrote:
> >
> > Or a link to it if the link is not in the  post he linked to :-D
> >
> > 2016-03-20 11:30 GMT+01:00 Stuart Poulton <stuart at poulton.org.uk>:
> > Damon,
> >
> > You might get a better response if you post the code.
> >
> > Stuart
> >
> > On 20 Mar 2016, at 07:25, Damon Hart-Davis <damon at opentrv.uk> wrote:
> >
> > > I have posted a question on the Arduino forum here:
> > >
> > > http://forum.arduino.cc/index.php?topic=387790.msg2672097#msg2672097
> > >
> > > Rgds
> > >
> > > Damon
> > >
> > >> On 18 Mar 2016, at 20:12, Damon Hart-Davis <damon at opentrv.uk> wrote:
> > >>
> > >> Hi,
> > >>
> > >> We are seeing some bizarre behaviour where when we try to write a
> 16-byte key into EEPROM it fails to ‘stick’ properly the first time.  If
> the board is power-cycled and the key is written again, it appears to stick
> as expected.  (There’s some subtle sub-wierdnesses also.)  This uses some
> ‘careful’ update routines that we use extensively elsewhere and seem to be
> fine with blocks as large as 8 bytes long (node IDs).
> > >>
> > >> Lots of use of my favourite search engine is failing to show any
> evidence of this being a common problem.
> > >>
> > >> I have reviewed the code repeatedly and found a minor wrinkle which
> is merely an inefficiency, not an error.
> > >>
> > >> Anyone fancy doing some detective work and then pointing out exactly
> why I shouldn’t be allowed near a keyboard any more?  B^>
> > >>
> > >> Rgds
> > >>
> > >> Damon
> > >> _______________________________________________
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> > >> http://lists.opentrv.org.uk/listinfo/opentrv-dev
> > >
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> >
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> >
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>
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