Lpc2000

--- 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/