Lpc2000

> -----Original Message-----
> From: lpc2000@yahoogroups.com 
> [mailto:lpc2000@yahoogroups.com] On Behalf Of y4krys
> Sent: Thursday, 01 September, 2005 3:43 AM
> To: lpc2000@yahoogroups.com
> Subject: [lpc2000] Re: interrupt external
> 
> --- In lpc2000@yahoogroups.com, Jean-Rene David <jrdavid@m...> wrote:
> > * dasbento@a... <dasbento@a...>:
> > > anyone knows if is possible change the mode of the external 
> > > interrupt when the arm is in operation,
> > 
> > It seems the external interrupt registers are seriously broken.
> > 
> > I have read the LPC2214's errata sheet, namely version 1.6. Three 
> > erratas concern the external interrupt registers: EXTINT.1, 
> EXTINT.2 
> > and VPBDIV.1.
> > 
> > However what I found was that the workarounds
> > suggested:
> >    
> >    a. were not always necessary
> >    b. didn't always work
> > 
> > Which is a bit unfortunate.
> > 
> > In a bit more detail:
> > 
> > I was able to configure EXTINT0 as rising edge sensitive *without* 
> > implementing any of the workarounds.
> > 
> > I was *not* able to configure EXTINT0 as rising edge *with* all the 
> > workarounds.
> > 
> > I was able to configure EXTINT3 as rising edge sensitive 
> only with all 
> > the workarounds *and* only if EXTINT0 had not been configured 
> > previously.
> > 
> > If EXTINT0 had been configured as rising-edge sensitive 
> first, then I 
> > wasn't able to configure
> > EXTINT3 as rising-edge at all, workaround or not.
> > 
> > JR
> 
> Does anybody know if the problem is common to all the LPC2xxx family?
> I'm considering using an LPC2xxx processor in my next design.

I also have had odd problems with getting combinations on an lpc2124. I
couldn't seem to get edge triggered EINT0 working at the same time as
edge triggered EINT2 and level+or triggered EINT3. As it turned out I
was able to work around the problem for my application so I didn't
pursue it furthur, but there does seem to be something broken there.

Cheers,
Bruce