ST STM32F31xx User Manual page 360

Real-time clock (RTC)
RTC Wakeup configuration

Configure the RTC Wakeup Clock source use the RTC_WakeUpClockConfig()
function.

Configure the RTC WakeUp Counter using the RTC_SetWakeUpCounter() function

Enable the RTC WakeUp using the RTC_WakeUpCmd() function

To read the RTC WakeUp Counter register, use the RTC_GetWakeUpCounter()
function.
Outputs configuration
The RTC has 2 different outputs:

AFO_ALARM: this output is used to manage the RTC Alarm A, Alarm B and WaKeUp
signals. To output the selected RTC signal on RTC_AF pin, use the
RTC_OutputConfig() function.

AFO_CALIB: this output is 512Hz signal or 1Hz . To output the RTC Clock on
RTC_AF pin, use the RTC_CalibOutputCmd() function.
Smooth digital Calibration configuration

Configure the RTC Original Digital Calibration Value and the corresponding
calibration cycle period (32s,16s and 8s) using the RTC_SmoothCalibConfig()
function.
TimeStamp configuration

Configure the RTC_AF trigger and enables the RTC TimeStamp using the
RTC_TimeStampCmd() function.

To read the RTC TimeStamp Time and Date register, use the RTC_GetTimeStamp()
function.

To read the RTC TimeStamp SubSecond register, use the
RTC_GetTimeStampSubSecond() function.
Tamper configuration

Configure the Tamper filter count using RTC_TamperFilterConfig() function.

Configure the RTC Tamper trigger Edge or Level according to the Tamper filter (if
equal to 0 Edge else Level) value using the RTC_TamperConfig() function.

Configure the Tamper sampling frequency using RTC_TamperSamplingFreqConfig()
function.

Configure the Tamper precharge or discharge duration using
RTC_TamperPinsPrechargeDuration() function.

Enable the Tamper Pull-UP using RTC_TamperPullUpDisableCmd() function.

Enable the RTC Tamper using the RTC_TamperCmd() function.

Enable the Time stamp on Tamper detection event using
RTC_TSOnTamperDetecCmd() function.
Backup Data Registers configuration

To write to the RTC Backup Data registers, use the RTC_WriteBackupRegister()
function.

To read the RTC Backup Data registers, use the RTC_ReadBackupRegister()
function.
360/584 DocID023800 Rev 1
UM1581