internal RTC example

[Timothy]

I am using the nRF9160dk development board and I could not find a test or example for the internal RTC. could you provide a simple example of using the internal RTC.

[Sigurd]

Hi,

You can take a look at this sample, it uses the RTC directly.

But for most use-cases, you should use the kernel timer instead (the kernel timer uses the RTC). See this page

Snippet:

struct k_timer single_shot_timer;
struct k_timer multi_shot_timer;

static void my_expiry_function_1(struct k_timer *timer)
{
	ARG_UNUSED(timer);
	printk("single_shot_timer expired\n");

}

static void my_expiry_function_2(struct k_timer *timer)
{
	ARG_UNUSED(timer);
	printk("multi_shot_timer expired\n");

}

void main(void)
{
	printk("The kernel timer sample started\n"); // Doc: https://docs.zephyrproject.org/latest/reference/kernel/timing/timers.html

	/* start one single shot timer that expires after 5000 ms */
	/* start one multi shot timer that expires after 5000ms, and then every 5000 ms */
    k_timer_start(&single_shot_timer, K_MSEC(5000),             0);
	k_timer_start(&multi_shot_timer,  K_MSEC(5000), K_MSEC(5000) );
}

K_TIMER_DEFINE(single_shot_timer, my_expiry_function_1, NULL);
K_TIMER_DEFINE(multi_shot_timer,  my_expiry_function_2, NULL);