Decrease the timer resolution of SDK 14

Question

How can we decrease the resolution of the timer to 500 ms in SDK 14? The minimum resolution I could get to was 1 ms by changing the APP_TIMER_CONFIG_RTC_FREQUENCY macro to 31. 
 Thanks 
 Atul

superpak · Accepted Answer

The app_timer library sets the prescaler for you. Look at the rtc1_init(..) routine in app_timer.c 
 The APP_TIMER_CONFIG_RTC_FREQUENCY is the prescaler value for app_timer library. 
 
 static void rtc1_init(uint32_t prescaler)
{
 NRF_RTC1->PRESCALER = prescaler;
 NVIC_SetPriority(RTC1_IRQn, RTC1_IRQ_PRI);
} 
 
 This is called by app_timer_init(...) 
 
 ret_code_t app_timer_init(void)
{
.....

rtc1_init(APP_TIMER_CONFIG_RTC_FREQUENCY);

....
}

Decrease the timer resolution of SDK 14

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