Little correction on our part. We did not overclock the ARM, it was
running @ 200MHz. However, as I mentioned, its idle time was 0 because
of a mistake in our sleep routine.
The ARM is still running @ 200MHz, but it is now working roughly 5% of
the time...
Good day to all,
Vincent
--- In "vincentkassis" <> wrote:
>
> Hello all,
>
> First, thank you for your input.
>
> Second, it seems we had problems because we were overclocking the ARM
> and because we had a problem in our sleep routine (the ARM was always
> active). After downclocking and debugging the sleep routine, the
> temperature inside the enclosure never goes over 45-50¤C and the ARM
> never fails.
>
> It would be interesting to evaluate the temperature when the ARM is
> always on. We'll try it out in the coming weeks.
>
> We will look into shading the ARM enclosure with a aluminum panel in
> the final installation.
>
> Thank you all again,
>
>
> Vincent
>
>
>
>
> --- In "Yan Seiner" <yan@> wrote:
> >
> > --- In "vincentkassis" <vincentkassis@>
wrote:
> > >
> > > Hello,
> > >
> > > Thank you for the input, but no, the power supply is out of the
> > enclosure.
> > >
> > > We just lost a 2nd ARM after 3 days of running in the same
enclosure.
> > > So that rules out a problem associated with a manufacturing
defect (we
> > > think and hope...).
> > >
> > > The OS does not seem to crash, but the network functions and the
RS232
> > > interface simply stop working after heat build up.
> > >
> > > If we remove the lid of the enclosure, everything starts working
again
> > > correctly, without a reboot!
> > >
> > > By the way, we purchase extended temperature ARM boards. Is there a
> > > way to identify a ARM with the extended temperature option from one
> > > without the option?
> > >
> > > Thank you in advance for any input.
> >
> >
> > How hot is it getting inside that enclosure? And what is the major
> > heat source?
> >
> > Off-hand you can try
> >
> > a) painting the box white or reflective silver
> > b) shading it with a piece of reflective metal (alum. or stainless)
> >
> > We use both of these quite effectively.
> >
>
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/ts-7000/
<*> Your email settings:
Individual Email | Traditional
<*> To change settings online go to:
http://groups.yahoo.com/group/ts-7000/join
(Yahoo! ID required)
<*> To change settings via email:
<*> To unsubscribe from this group, send an email to:
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
|