Lpc2000

You are right, I made a mistake writing my previous mail, it was not 
__enable_intrinsic() but of course __enable_interrupt().

Now I have introduced the IRQ Handler exactly as you told me. In that 
way, the Timer1 ISR should be called by the irq_handler whenever an 
interrupt occurs. BUT, it sill not work! In debug mode I can see the 
timer incrementing and when it reaches the match value register, it 
resets and put the IR1 bit to '1' but the ISR is never reached... I 
think there is a problem with the IAR intrinsic __enable_interrupt() 
and __disable_interrupt(). In step by step mode, when the 
__enable_interrupt() is executed, that blocks the programm... Any 
idea of the problem, or do you know the asm code of __enable_interrupt
() ans __disable_interrupt ?

(the code follow at the end of this mail)

Thank you very much !

--- In lpc2000@yahoogroups.com, "Leighton Rowe" <leightonsrowe@y...> 
wrote:
> I'm curious about 2 things.
> 
> 1. "__enable_intrinsic()"
>    Is this really the function you used or do you really mean 
> __enable_interrupt().
> 
> 2. Where is your IRQ Handler? The only time I used "_irq" was to 
> define the IRQ handler...not the ISR.
> 
> something like...
> 
> __arm __irq void IRQ_handler(void)
> {
>  ISRAddress = VICVectAddr;     //load source address
>  (*ISRAddress)()               //function call
>  VICVectAddr=0; //reset VIC
>  return;
> }
> 
> void Timer1ISR(void) //Timer1 ISR
> {
>    .....
> }
> 
> 
> That way ISRs get called by the handler whenever any enabled 
> interrupt channel is activated. 
> 
> Some example code should come with your IAR compiler...somewhere in 
> the /ARM/src directory. Make sure u look at those. They'll come in 
> very handy.
> 
> Leighton

Here is a piece of my code:
> > 
> >   __disable_interrupt(); // IAR intrinsic
> >   VICProtection=0x0;    
> > 
> >   VICIntEnClear=0xffffffff;   
> > 
> >   VICIntEnable=0x20;    //Timer1
> >   VICIntSelect=0x00;    //all interrupts are IRQs
> >   VICVectCntl0=0x25;    
> >   VICVectAddr0=(unsigned long)&Timer1ISR;
> >   __enable_interrupt();
> > 
> >   Then I also initialize Timer1:
> > 
> >   T1_IR=0x00;
> >   T1_MR0=TIMERMATCH;
> >   T1_MCR=0x03;  // reset timer and fire interrupt        
> >   T1_PR=0x0;         
> >   T1_TC=0x00;   
> >   T1_TCR=0x01;  // start the timer
> > 
> > __arm __irq void irq_handler(void) //Timer1 ISR
> > {
> >   ISRAddress = VICVectAddr;     //load source address
> >   (*ISRAddress)()               //function call
> >   VICVectAddr=0; //reset VIC
> >   return;
> > }
> >
> > void Timer1ISR()
> > {
> >  IR1 = 0x01;
> > }
> >