Lpc2000

--- In lpc2000@yahoogroups.com, "theothervmax" <vmax@...> wrote:
>
> --- In lpc2000@yahoogroups.com, "sifiland" <sifiland@> wrote:
> >
> > Hi,
> > 
> > If I let Timer0 with FIQ run, then the program jumps either in 
> > Default_handler or makes RESETS.  Timer0 with IRQ runs completely 
> > normally.  
> > 
> > What can the cause? 
> > Thanks.
> > 
> > µC:  LPC2136 
> > compiler:  IAR 
> > 
> > __fiq __arm void fiq_handler(void)
> > {
> >     void (*interrupt_function)();
> >     unsigned int vector;
> > 
> >     // Interrupt-Vektor load
> >     vector = VICVectAddr;
> >     interrupt_function = (void(*)())vector;
> >     
> >     // call Interruptfunktion 
> >     (*interrupt_function)();
> > 
> >     // Interrupt reset
> >     VICVectAddr = 0;
> > }
> > 
> > void    Int_Timer0(void)
> > {
> >    //
> >     ...
> >     //
> >    T0IR=0xFF;
> > 
> > }
> >
> 
> Hi,
> I think you've just changed "__irq" qualifier in IAR's sample IRQ 
> handler to "__fiq". As a result, nothing works.
> The main reason is that handling IRQ and FIQ is quite different and 
> it's no use trying to get the handler address from VICVectAddr when 
> FIQ occurs.
> If you have set up FIQ correctly in "Startup.s", try to rewrite FIQ 
> handler so that it called "Int_Timer0()" directly. 
> 
> Regards,
> Max
>

It seems to function.  I will still test 

Thanks Max!  

sifiland