app/alarm.c


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#include "project.h"

#define ALARM_LENGTH 30

EPOCH alarm;

static void alarm_off (void)
{
  led5_set (0);
}


static void alarm_on (void)
{
  led5_set (1);
}


void alarm_dispatch (void)
{
  uint64_t abs =  ref_get();
  EPOCH d, e = ref_decompose (abs);

  d = time_epoch_sub (e, alarm);

  if ((d.s < 0) || (d.s > ALARM_LENGTH)) alarm_off();
  else alarm_on();
}