Lpc2000

This seems disastrous, severely limiting the usefulness of the part.  

 

Is this just a problem with the 213x parts?

 

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From: lpc2000@yahoogroups.com [mailto:lpc2000@yahoogroups.com] On Behalf
Of dsidlauskas1
Sent: Monday, July 04, 2005 7:55 AM
To: lpc2000@yahoogroups.com
Subject: [lpc2000] Re: Philip Aps. - Stack Issue

 

Martin and All,

Sorry for the wrong message number. Message 7898 fully describes the
problem.

In brief:
"
It appears anytime the PC and SP are equal except for the high byte of
the address, and you run a POP {R4} instruction, the chip will pop two
times off the stack thus loading R4 with the wrong value and messing
up your stack.

for example:

0x000001F4 POP {R4} With SP = 0x400001F4.

R4 will be loaded with the contents of 0x400001F8.
"

Dave

--- In lpc2000@yahoogroups.com, "Martin Maurer" <mailingliste@c...>
wrote:
> Can you add a short summary of the problem, what the problem is ?
> 
> Regards,
> 
>          Martin
> 
> ----- Original Message ----- 
> From: "lpc2100_fan" <lpc2100_fan@y...>
> To: <lpc2000@yahoogroups.com>
> Sent: Monday, July 04, 2005 8:12 AM
> Subject: [lpc2000] Re: Philip Aps. - Stack Issue
> 
> 
> > Dave,
> > 
> > Your pointer was a little misleading (7923) but I found the issue
> > described in 7898.
> > 
> > My question to the original poster (I guess Keith) is whether the
MAM
> > was enabled? If not please do so.  
> > 
> > Did enabling the MAM change anything?
> > 
> > 
> > 
> > --- In lpc2000@yahoogroups.com, "dsidlauskas1" <dsidlauskas@w...>
wrote:
> >> Message 7923 describes a bizarre stack problem on the 213x. If
this is
> >> correct, it would seem to seriously limit the usefulness of this
part.
> >> 
> >> What say you Philips Ap's?
> >> 
> >> Dave
> > 
> > 
> > 
> > 
> > 
> > Yahoo! Groups Links
> > 
> > 
> > 
> > 
> > 
> > 
> >





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