RTC reliable flag

[L.B.]

Hello everyone,

I am looking at the init structure of the NRF52832's RTC and I cannot find any explanation on the "reliable" variable.

typedef struct
{
    uint16_t prescaler;          /**< Prescaler. */
    uint8_t  interrupt_priority; /**< Interrupt priority. */
    uint8_t  tick_latency;       /**< Maximum length of the interrupt handler in ticks (maximum 7.7 ms). */
??? bool     reliable;           /**< Reliable mode flag. */   
} nrfx_rtc_config_t;

I can see its usage in the driver but this makes me wonder even more :-)

So, what is the purpose of the "reliable" flag?

Regards,

L. B.

[Einar Thorsrud]

Hi,

The reliable mode adds some margin for latency (which could be caused by anything really, including higher priority interrupts, which are application specific). You can read more about it in the API documentation for nrfx_rtc_cc_set() and nrfx_rtc_max_ticks_get().