Function rtc_calendar_frequency

Calibrate for too-slow or too-fast oscillator.

enum status_code rtc_calendar_frequency_correction(
		struct rtc_module *const module,
		const int8_t value)

When used, the RTC will compensate for an inaccurate oscillator. The RTC module will add or subtract cycles from the RTC prescaler to adjust the frequency in approximately 1 PPM steps. The provided correction value should be between -127 and 127, allowing for a maximum 127 PPM correction in either direction.

If no correction is needed, set value to zero.

Note: Can only be used when the RTC is operated at 1Hz.

Table 1. Parameters
Data direction	Parameter name	Description
[in, out]	module	Pointer to the software instance struct
[in]	value	Between -127 and 127 used for the correction

Returns

Status of the calibration procedure.

Table 2. Return Values
Return value	Description
STATUS_OK	If calibration was done correctly
STATUS_ERR_INVALID_ARG	If invalid argument(s) were provided

Function rtc_calendar_frequency_correction()

Returns