Lpc2000

On 4 Mar 2005 at 14:51, Hugh O'Keeffe wrote:

> 
> Ashling provide a timer interrupt example which demonstrates how to
> handle nested interrupts, the VIC and timers etc. If anyone is
> interested I can post it to the files section. I've been falling
> behind on posts lately so apologies if some one has answered this
> already....
> 
> 
> The following source snippet is taken from the file...
> 
> /*
> 
> This program initiates two timers, (Timer0 and Timer1), to go off at
> TIMER0_INTERVAL TIMER1_INTERVAL (#defines) intervals respectively. 
> 
> Both Timer0 and Timer1 interrupt handler takes half of the interrupt
> period to execute. 
> 
> Timer0 is configured as a higher priority interrupt than Timer1. Since
> it occurs more often that Timer1, it will periodically become a nested
> interrupt (interrupts Timer1). 
> 
> Whenever the Timer1 interrupts, it turns on P0.4 while the interrupt
> handler executing.
> 
> Whenever the Timer0 interrupts, it turns on P0.5 while the interrupt
> handler executing.
> 
> Whenever the Timer0 interrupts Timer1 (i.e. nested condition), it
> turns on P0.6 while the interrupt handler executing.
> 
> */
> 

Please, I would love to have a working example for GNU tools  for nested
interrupts on the ARM. 

Regards
   Anton Erasmus
-- 
A J Erasmus