/**
* @brief Sets the Smooth calibration parameters.
* @param hrtc: RTC handle
* @param SmoothCalibPeriod: Not used (only present for compatibility with another families)
* @param SmoothCalibPlusPulses: Not used (only present for compatibility with another families)
* @param SmouthCalibMinusPulsesValue: specifies the RTC Clock Calibration value.
* This parameter must be a number between 0 and 0x7F.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_RTCEx_SetSmoothCalib(RTC_HandleTypeDef* hrtc, uint32_t SmoothCalibPeriod, uint32_t SmoothCalibPlusPulses, uint32_t SmouthCalibMinusPulsesValue)
{
/* Check input parameters */
if(hrtc == NULL)
{
return HAL_ERROR;
}
/* Check the parameters */
assert_param(IS_RTC_SMOOTH_CALIB_MINUS(SmouthCalibMinusPulsesValue));
/* Process Locked */
__HAL_LOCK(hrtc);
hrtc->State = HAL_RTC_STATE_BUSY;
/* Sets RTC Clock Calibration value.*/
MODIFY_REG(BKP->RTCCR, BKP_RTCCR_CAL, SmouthCalibMinusPulsesValue);
/* Change RTC state */
hrtc->State = HAL_RTC_STATE_READY;
/* Process Unlocked */
__HAL_UNLOCK(hrtc);
return HAL_OK;
}
/**
* @brief Sets the Smooth calibration parameters.
* @param hrtc: RTC handle
* @param SmoothCalibPeriod: Select the Smooth Calibration Period.
* This parameter can be can be one of the following values :
* @arg RTC_SMOOTHCALIB_PERIOD_32SEC: The smooth calibration periode is 32s.
* @arg RTC_SMOOTHCALIB_PERIOD_16SEC: The smooth calibration periode is 16s.
* @arg RTC_SMOOTHCALIB_PERIOD_8SEC: The smooth calibartion periode is 8s.
* @param SmoothCalibPlusPulses: Select to Set or reset the CALP bit.
* This parameter can be one of the following values:
* @arg RTC_SMOOTHCALIB_PLUSPULSES_SET: Add one RTCCLK puls every 2*11 pulses.
* @arg RTC_SMOOTHCALIB_PLUSPULSES_RESET: No RTCCLK pulses are added.
* @param SmouthCalibMinusPulsesValue: Select the value of CALM[8:0] bits.
* This parameter can be one any value from 0 to 0x000001FF.
* @note To deactivate the smooth calibration, the field SmoothCalibPlusPulses
* must be equal to SMOOTHCALIB_PLUSPULSES_RESET and the field
* SmouthCalibMinusPulsesValue mut be equal to 0.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_RTCEx_SetSmoothCalib(RTC_HandleTypeDef* hrtc, uint32_t SmoothCalibPeriod, uint32_t SmoothCalibPlusPulses, uint32_t SmouthCalibMinusPulsesValue)
{
uint32_t tickstart = 0;
/* Check the parameters */
assert_param(IS_RTC_SMOOTH_CALIB_PERIOD(SmoothCalibPeriod));
assert_param(IS_RTC_SMOOTH_CALIB_PLUS(SmoothCalibPlusPulses));
assert_param(IS_RTC_SMOOTH_CALIB_MINUS(SmouthCalibMinusPulsesValue));
/* Process Locked */
__HAL_LOCK(hrtc);
hrtc->State = HAL_RTC_STATE_BUSY;
/* Disable the write protection for RTC registers */
__HAL_RTC_WRITEPROTECTION_DISABLE(hrtc);
/* check if a calibration is pending*/
if((hrtc->Instance->ISR & RTC_ISR_RECALPF) != RESET)
{
tickstart = HAL_GetTick();
/* check if a calibration is pending*/
while((hrtc->Instance->ISR & RTC_ISR_RECALPF) != RESET)
{
if((HAL_GetTick()-tickstart) > RTC_TIMEOUT_VALUE)
{
/* Enable the write protection for RTC registers */
__HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);
/* Change RTC state */
hrtc->State = HAL_RTC_STATE_TIMEOUT;
/* Process Unlocked */
__HAL_UNLOCK(hrtc);
return HAL_TIMEOUT;
}
}
}
/* Configure the Smooth calibration settings */
hrtc->Instance->CALR = (uint32_t)((uint32_t)SmoothCalibPeriod | (uint32_t)SmoothCalibPlusPulses | (uint32_t)SmouthCalibMinusPulsesValue);
/* Enable the write protection for RTC registers */
__HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);
/* Change RTC state */
hrtc->State = HAL_RTC_STATE_READY;
/* Process Unlocked */
__HAL_UNLOCK(hrtc);
return HAL_OK;
}