[riot-devel] rtc alarm running with threads

Paula Ortega Cancino pportega at uc.cl
Fri Oct 20 21:45:08 CEST 2017

Hi Oleg,

Thanks for your help. I should mention that i'm working on the 2017.07
release. This is the main functions of the code, the behavor i'm expecting
is to trigger the alarm every TIME_WAITING seconds, run sale_test() and the
go back to the control thread. However i get a kernel panic or run only the
control_thread, without considering the rtc_alarm after a while.

kernel_pid_t control_pid;

int sale_test(void){
    DEBUG("Send sale\n");
    return 1;

/* set interrupt event every TIME_WAITING  = 10 seconds*/
static void onInterruptEvent(void *arg)
    struct tm time;

    /* schedule next message */
    time.tm_sec  += TIME_WAITING;
    /* Make an interrupt */

    rtc_set_alarm(&time, onInterruptEvent, 0);

void *control_thread(void *arg)
    (void) arg;
    while (1) {
      DEBUG("Running thread right now\n");
    return NULL;

int main(void)
    printf("This test will display 'Alarm every %i seconds'\n",

    /* initialize rtc functions */


    control_pid = thread_create(stack, sizeof(stack),
    control_thread, NULL, "control");
    (void) control_pid;

    return 0;


2017-10-19 14:41 GMT-03:00 Oleg Hahm <oleg at riot-os.org>:

> Dear Paula,
> can you share the code of your application somewhere? That might help to
> find
> the issues. I would suppose that the interrupt handler is faulty or
> consumes
> too much memory or something like this.
> I think start debugging with a basic application that just prints some text
> whenever a message from the RTC interrupt is received is a smart idea.
> Now, we
> need to figure out what exactly triggers the kernel panic. Are you
> compiling
> your application with the DEVELHELP macro enabled? And which port are you
> using? Maybe you can use `make debug` to get more information.
> Cheers,
> Oleg
> --
> /* Fuck, we are miserable poor guys... */
>         linux-2.6.6/net/xfrm/xfrm_algo.c
> _______________________________________________
> devel mailing list
> devel at riot-os.org
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