Lpc2000

We are using the 2138 in two projects. This is an issue that should be confirmed by Philips apps. 

I am wondering if this is compiler specific too. We use GCC for our projects and so far I haven't seen any generated POP instruction in the listing file.

regards,
marko

> 
> Od: "unity0724" <unity0724@...>
> Datum: 2005/07/06 Sre AM 02:53:45 CEST
> Za: lpc2000@yahoogroups.com
> Zadeva: [lpc2000] Re: Philip Aps. - Stack Issue
> 
> Hi, 
> 
> Help!!  I'm using lots of LPC2124, but not LPC213x yet.
> Somebody pls.. pls.. confirm problem related to LPC213x only.
> (something like due to moving port I/O to local bus and add
> address comparator so that prefetch queue not flushed 
> => for high speed I/O port toggling.   Or whats ever)
> 
> Many Thanks and Best Regards   /MH
> 
> 
> --- In lpc2000@yahoogroups.com, "lp2000c" <lp2000c@e...> wrote:
> > WOW!!
> > 
> > Has anyone else reproduced this?
> > 
> > keithgw_strider:
> > 
> > Have you found out anything more?
> > 
> > 
> > 
> > --- In lpc2000@yahoogroups.com, "dsidlauskas1" <dsidlauskas@w...> 
> > wrote:
> > > 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
> > > > > 
> > > > > 
> > > > > 
> > > > > 
> > > > > 
> > > > > 
> > > > >
> 
> 
> 
> 
>  
> Yahoo! Groups Links
> 
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>  
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