Had a problem where the time is not being updated in the shadow register even after calling HAL_RTC_WaitForSynchro()
Apparently I’ve missed this in the function header:
/** * @brief Gets RTC current time. * @param hrtc: pointer to a RTC_HandleTypeDef structure that contains * the configuration information for RTC. * @param sTime: Pointer to Time structure * @param Format: Specifies the format of the entered parameters. * This parameter can be one of the following values: * @arg RTC_FORMAT_BIN: Binary data format * @arg RTC_FORMAT_BCD: BCD data format * @note You must call HAL_RTC_GetDate() after HAL_RTC_GetTime() to unlock the values * in the higher-order calendar shadow registers to ensure consistency between the time and date values. * Reading RTC current time locks the values in calendar shadow registers until Current date is read. * @retval HAL status */
My Tech Blog 