Create an rtc_module struct and add to the main application source file, outside of any functions:
struct rtc_module rtc_instance;
Copy-paste the following setup code to your applications
main():
void configure_rtc_count(void)
{
struct rtc_count_config config_rtc_count;
rtc_count_get_config_defaults(&config_rtc_count);
config_rtc_count.prescaler = RTC_COUNT_PRESCALER_DIV_1;
config_rtc_count.mode = RTC_COUNT_MODE_16BIT;
#ifdef FEATURE_RTC_CONTINUOUSLY_UPDATED
config_rtc_count.continuously_update = true;
#endif
config_rtc_count.compare_values[0] = 1000;
rtc_count_init(&rtc_instance, RTC, &config_rtc_count);
rtc_count_enable(&rtc_instance);
}