Lpc2000

--- In lpc2000@yahoogroups.com, Robert Adsett <subscriptions@...> 
wrote:
>
> At 08:05 AM 2/23/06 +0000, gvnn77 wrote:
> >--- In lpc2000@yahoogroups.com, "Joel Winarske" <joelw@> wrote:
> > >
> > > > I am not able to understand why
> > > >
> > > > T0MR0 += L_COMPAREMATCH;
> > > >
> > > > doesn't work!!! I use other micro, such as Texas MSP430, and 
this
> > > > implementation work well! Is there a bug in micro or I have 
to do
> > > > something before read/write T0MR0???
> > >
> > > Hmm, I'm doing this on a LPC2148 with no problem:
> > >
> > > T0MR0 += SAMPLE_INTERVAL;
> > >
> > > Did you check the assembler output?
> > >
> > >
> > > Joel
> > >
> >
> >Source code is:
> 
> Have you verified your interrupt latency yet? See my earlier post 
if not.
> 
> Like Joel I'm using similar code w/o any issues.  I really think 
you need 
> to verify that your interrupt latency is reasonable.  If you 
latency is 
> longer than you expect then you will see exactly the behaviour you 
have 
> described.
> 
> If you do find out it is unexpectedly long you can determine why 
but you do 
> need to find out if it could be an issue first.  Running off after 
other 
> issues without verifying may just cause you to burn a lot of time 
to no 
> good purpose.  Unless of course you enjoy the frustration ;) but 
then I 
> guess you wouldn't be asking for suggestions.
> 
> 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/
>

Hi,
about interrupt latency, I tried to set L_COMPAREMATCH as big as my 
tick will be greater than 1 millisecond without interesting result. 
And I think that my interrupt latency is smaller than 1 millsecond...
What do you think?
Thank you
Enrico