Lpc2000

Thanks, Richard. I'll try to dig deeper on it.

Guille

--- In lpc2000@yahoogroups.com, "robertadsett" <subscriptions@...> 
wrote:
>
> --- In lpc2000@yahoogroups.com, "Guillermo Prandi"
> <yahoo.messenger@> wrote:
> >
> > Yes, with LPC you can tell the source of the startup, but in this 
> > case the startup is hardware-originated, so I am pretty sure it 
is 
> > hardware. You suggest that the processor doesn't clear the proper 
> > bits for the bootloader to tell?
> 
> I'm suggesting it needs to be verified one way or the other. 
> Certainly the observed behaviour suggests that as a possibility.
> 
> There are, of course, many ways to implement this reset source
> recognition but one way is to write a bit into a register for
> occurances other than power on.  These bits are then never cleared 
and
> so are always set the way they were last set.  A power on
> automatically clears the register.  
> 
> ISTR a Motorola micro that behaved in that fashion, there was an
> explicit line in the user manual saying that the reset source 
register
> should be cleared in order to properly recognize the source of
> subsequent resets.  Consider that an incentive to throughly read the
> user manual, miss one line and spend days tracking down what seems 
to
> be odd behaviour ;)
> 
>  Robert
>  
>  " 'Freedom' has no meaning of itself.  There are always 
restrictions,
>   be 
>  they legal, genetic, or physical.  If you don't believe me, try to 
> chew a 
>  radio signal. "  -- Kelvin Throop, III
>  http://www.aeolusdevelopment.com/
>