Lpc2000

Is there any way of chosing on what level the interrupt should trigger
(logic 1 or 0)? As it is now it triggers on 0.
 

--- In lpc2000@yahoogroups.com, "frumbub" <j_lilje@h...> wrote:
> Problem solved!
> Thanks for the help. (sometimes it helps just to write down the
> problems ;) )
> 
> --- In lpc2000@yahoogroups.com, "frumbub" <j_lilje@h...> wrote:
> > Yes that stops th infinite loop, but another problem remains.
> > It seems that the ISR dont returns. The system freezes.
> > Any ideas?
> > 
> > --- In lpc2000@yahoogroups.com, Richard Duits <yahoo@r...> wrote:
> > > You need to clear the external interrupt (even with level sensitive 
> > > interrupts) with like in the following code:
> > > 
> > > void eint_ISR( void )
> > > {
> > >   vParTestToggleLED( 0 );
> > >     EXTINT = 1;  /* clear EINT0 */
> > >     VICVectAddr = 0; /* acknowledge interrupt */
> > > }
> > > 
> > > 
> > > Richard Duits
> > > 
> > > 
> > > frumbub wrote:
> > > 
> > > > Hello
> > > >
> > > > I am having problems with the EINT0 interrupt.
> > > > I have searched the posts and tried all suggested sollutions,
but my
> > > > problem persists.
> > > >
> > > > The problem is that the system stays in the ISR like in an
> > infinite loop.
> > > >
> > > > Code:
> > > > void eint_ISR( void )
> > > > {
> > > >       vParTestToggleLED( 0 );
> > > >       VICVectAddr = ringCLEAR_VIC_INTERRUPT;
> > > > }
> > > > And thats it... the vParTestToggleLED( 0 ) function just toggles
> a led
> > > > one time, that is verified, but when EINT0 is triggered if flashes
> > > > endlessly and the other processes are blocked.
> > > >
> > > > The EINT0 setp code:
> > > >
> > > > VICIntSelect &= ~( RING_VIC_CHANNEL_BIT );
> > > > VICIntEnable |= RING_VIC_CHANNEL_BIT;
> > > > VICVectAddr2 = ( portLONG ) vRING_ISR;
> > > > VICVectCntl2 = RING_VIC_ENABLE | RING_VIC_CHANNEL;
> > > >
> > > > /* Enable EINT0 interrupt. */
> > > > PCB_PINSEL1 |= EINT0_ENABLE;
> > > >
> > > > Please help me out...
> > > >
> > > >
> > > >
> > > >
> >
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