When I need work to operate on a regular basis and not drift I create a work queue and a timer that is setup to submit the work to the queue on a regular basis. This way it doesn’t matter how long it takes to finish the work, the next work run will still start at exactly the right time. main() calls  clock_init() to get this started…

#include <stdio.h>

#include <stddef.h>

#include <stdint.h>

#include <zephyr.h>

#include <zephyr/types.h>

#define TIME_INC_FREQUENCY      10      // in secs

void my_work_handler(struct k_work *work)

{

     // do whatever here

}

K_WORK_DEFINE(my_work, my_work_handler);

void my_timer_handler(struct k_timer *dummy)

{

    k_work_submit(&my_work);

}

K_TIMER_DEFINE(my_timer, my_timer_handler, NULL);

void clock_init(void) {

    k_timer_start(&my_timer, K_SECONDS(TIME_INC_FREQUENCY), K_SECONDS(TIME_INC_FREQUENCY));

}

Lawrence King

Principal Developer

+1(416)627-7302