[ECOS] Problem with interrupts

["Igor Trevisan" <igor dot trevisan at bluewind dot it>]

Hi all!

I'm having some problems trying to install an interrupt in eCos
program.
I read something in some mails in the present mailing-list
and  I also found some code to take as an example.
But I couldn't make it run successfully!!
In the following lines I write the code I'm currently working on and
the output it produces while running on a board derived
from EDB7209 (with an ARM core based processor).
Can anyone explain me why I don't see anything changed by
the ISR?
Why cannot I have interrupts successfully installed?
Thanks in advance...

########################################################
#include <cyg/kernel/kapi.h>
#include <stdio.h>

static volatile unsigned long n_timer_0_interrupts = 0;
static volatile unsigned long n_timer_1_interrupts = 0;
unsigned long pippo = 0;

/* this is the ISR for timer 0 interrupts */
cyg_uint32 timer_0_handler(cyg_vector_t vector, cyg_addrword_t data)
{
  /* keep track of how many times that timer has interrupted us; this
     is basically all we do in this "driver" */
  n_timer_0_interrupts+=1;
  /* ISRs must acknowledge the interrupt, or they might be invoked
     again */

  pippo=13;

  cyg_interrupt_acknowledge(vector);

  return CYG_ISR_HANDLED;
}

/* this is the ISR for timer 1 interrupts */
cyg_uint32 timer_1_handler(cyg_vector_t vector, cyg_addrword_t data)
{
  /* keep track of how many times that timer has interrupted us; this
     is basically all we do in this "driver" */
  n_timer_1_interrupts+=1;
  /* ISRs must acknowledge the interrupt, or they might be invoked
     again */

  pippo=13;

  cyg_interrupt_acknowledge(vector);

  return CYG_ISR_HANDLED;
}

/* the main program here sits in an infinite loop seeing if
   n_timer_0_interrupts has changed, and printing the new values if it
   has changed */
int main( int argc, char *argv[] )
{
  int i;
  cyg_handle_t timer_0_ISR_H;
  cyg_handle_t timer_1_ISR_H;
  cyg_interrupt intr0, intr1;
  unsigned long  previous_timer_0_count = 0;
  unsigned long  previous_timer_1_count = 0;

  printf("\n********** Entered main prog *******************\n");


   /* create an interrupt handler with timer_0_handler() as the ISR
      and no DSR.  A DSR is not needed here because the ISR simply
      increments a global variable and does not take much time or use
      any operating system services */


  cyg_interrupt_create(CYGNUM_HAL_INTERRUPT_RTC, 0, 0, &timer_0_handler,
                       NULL, &timer_0_ISR_H, &intr0);

//  cyg_interrupt_create(CYGNUM_HAL_INTERRUPT_TC1OI, 0, 0, &timer_1_handler,
//                       NULL, &timer_1_ISR_H, &intr1);

  printf("********** Created interrupts handlers *********\n");

  cyg_interrupt_attach(timer_0_ISR_H);

//  cyg_interrupt_attach(timer_1_ISR_H);

  cyg_interrupt_unmask(CYGNUM_HAL_INTERRUPT_RTC);

  cyg_interrupt_enable();

  printf("********** Started main loop *******************\n");

  for (i=0;;i++) {
      if(i%10000000==0)
      printf("%d°loop\n",i);

    if(pippo==13)
    {
      printf("Yeeee!!!!.............\n");
	  pippo=0;
	  }

    if (n_timer_0_interrupts != previous_timer_0_count) {
      printf("new value of n_timer_0_interrupts: %lu\n",
             n_timer_0_interrupts);
      previous_timer_0_count = n_timer_0_interrupts;
    }

    if (n_timer_1_interrupts != previous_timer_1_count) {
      printf("new value of n_timer_1_interrupts: %lu\n",
             n_timer_1_interrupts);
      previous_timer_1_count = n_timer_1_interrupts;
    }
  }
}

#################### OUTPUT #########################
********** Entered main prog *******************
********** Created interrupts handlers *********
********** Started main loop *******************
0°loop
10000000°loop
20000000°loop

#####################################################

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