/********************************************************************************* @file stm32f10x_bkp.c* @author MCD Application Team* @version V3.1.0* @date 06/19/2009* @brief This file provides all the BKP firmware functions.******************************************************************************* @copy** THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE* TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY* DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING* FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE* CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.** <h2><center>© COPYRIGHT 2009 STMicroelectronics</center></h2>*//* Includes ------------------------------------------------------------------*/#include "stm32f10x_bkp.h"#include "stm32f10x_rcc.h"/** @addtogroup STM32F10x_StdPeriph_Driver* @{*//** @defgroup BKP* @brief BKP driver modules* @{*//** @defgroup BKP_Private_TypesDefinitions* @{*//*** @}*//** @defgroup BKP_Private_Defines* @{*//* ------------ BKP registers bit address in the alias region --------------- */#define BKP_OFFSET (BKP_BASE - PERIPH_BASE)/* --- CR Register ----*//* Alias word address of TPAL bit */#define CR_OFFSET (BKP_OFFSET + 0x30)#define TPAL_BitNumber 0x01#define CR_TPAL_BB (PERIPH_BB_BASE + (CR_OFFSET * 32) + (TPAL_BitNumber * 4))/* Alias word address of TPE bit */#define TPE_BitNumber 0x00#define CR_TPE_BB (PERIPH_BB_BASE + (CR_OFFSET * 32) + (TPE_BitNumber * 4))/* --- CSR Register ---*//* Alias word address of TPIE bit */#define CSR_OFFSET (BKP_OFFSET + 0x34)#define TPIE_BitNumber 0x02#define CSR_TPIE_BB (PERIPH_BB_BASE + (CSR_OFFSET * 32) + (TPIE_BitNumber * 4))/* Alias word address of TIF bit */#define TIF_BitNumber 0x09#define CSR_TIF_BB (PERIPH_BB_BASE + (CSR_OFFSET * 32) + (TIF_BitNumber * 4))/* Alias word address of TEF bit */#define TEF_BitNumber 0x08#define CSR_TEF_BB (PERIPH_BB_BASE + (CSR_OFFSET * 32) + (TEF_BitNumber * 4))/* ---------------------- BKP registers bit mask ------------------------ *//* RTCCR register bit mask */#define RTCCR_CAL_Mask ((uint16_t)0xFF80)#define RTCCR_Mask ((uint16_t)0xFC7F)/* CSR register bit mask */#define CSR_CTE_Set ((uint16_t)0x0001)#define CSR_CTI_Set ((uint16_t)0x0002)/*** @}*//** @defgroup BKP_Private_Macros* @{*//*** @}*//** @defgroup BKP_Private_Variables* @{*//*** @}*//** @defgroup BKP_Private_FunctionPrototypes* @{*//*** @}*//** @defgroup BKP_Private_Functions* @{*//*** @brief Deinitializes the BKP peripheral registers to their default reset values.* @param None* @retval None*/void BKP_DeInit(void){RCC_BackupResetCmd(ENABLE);RCC_BackupResetCmd(DISABLE);}/*** @brief Configures the Tamper Pin active level.* @param BKP_TamperPinLevel: specifies the Tamper Pin active level.* This parameter can be one of the following values:* @arg BKP_TamperPinLevel_High: Tamper pin active on high level* @arg BKP_TamperPinLevel_Low: Tamper pin active on low level* @retval None*/void BKP_TamperPinLevelConfig(uint16_t BKP_TamperPinLevel){/* Check the parameters */assert_param(IS_BKP_TAMPER_PIN_LEVEL(BKP_TamperPinLevel));*(__IO uint32_t *) CR_TPAL_BB = BKP_TamperPinLevel;}/*** @brief Enables or disables the Tamper Pin activation.* @param NewState: new state of the Tamper Pin activation.* This parameter can be: ENABLE or DISABLE.* @retval None*/void BKP_TamperPinCmd(FunctionalState NewState){/* Check the parameters */assert_param(IS_FUNCTIONAL_STATE(NewState));*(__IO uint32_t *) CR_TPE_BB = (uint32_t)NewState;}/*** @brief Enables or disables the Tamper Pin Interrupt.* @param NewState: new state of the Tamper Pin Interrupt.* This parameter can be: ENABLE or DISABLE.* @retval None*/void BKP_ITConfig(FunctionalState NewState){/* Check the parameters */assert_param(IS_FUNCTIONAL_STATE(NewState));*(__IO uint32_t *) CSR_TPIE_BB = (uint32_t)NewState;}/*** @brief Select the RTC output source to output on the Tamper pin.* @param BKP_RTCOutputSource: specifies the RTC output source.* This parameter can be one of the following values:* @arg BKP_RTCOutputSource_None: no RTC output on the Tamper pin.* @arg BKP_RTCOutputSource_CalibClock: output the RTC clock with frequency* divided by 64 on the Tamper pin.* @arg BKP_RTCOutputSource_Alarm: output the RTC Alarm pulse signal on* the Tamper pin.* @arg BKP_RTCOutputSource_Second: output the RTC Second pulse signal on* the Tamper pin.* @retval None*/void BKP_RTCOutputConfig(uint16_t BKP_RTCOutputSource){uint16_t tmpreg = 0;/* Check the parameters */assert_param(IS_BKP_RTC_OUTPUT_SOURCE(BKP_RTCOutputSource));tmpreg = BKP->RTCCR;/* Clear CCO, ASOE and ASOS bits */tmpreg &= RTCCR_Mask;/* Set CCO, ASOE and ASOS bits according to BKP_RTCOutputSource value */tmpreg |= BKP_RTCOutputSource;/* Store the new value */BKP->RTCCR = tmpreg;}/*** @brief Sets RTC Clock Calibration value.* @param CalibrationValue: specifies the RTC Clock Calibration value.* This parameter must be a number between 0 and 0x7F.* @retval None*/void BKP_SetRTCCalibrationValue(uint8_t CalibrationValue){uint16_t tmpreg = 0;/* Check the parameters */assert_param(IS_BKP_CALIBRATION_VALUE(CalibrationValue));tmpreg = BKP->RTCCR;/* Clear CAL[6:0] bits */tmpreg &= RTCCR_CAL_Mask;/* Set CAL[6:0] bits according to CalibrationValue value */tmpreg |= CalibrationValue;/* Store the new value */BKP->RTCCR = tmpreg;}/*** @brief Writes user data to the specified Data Backup Register.* @param BKP_DR: specifies the Data Backup Register.* This parameter can be BKP_DRx where x:[1, 42]* @param Data: data to write* @retval None*/void BKP_WriteBackupRegister(uint16_t BKP_DR, uint16_t Data){__IO uint32_t tmp = 0;/* Check the parameters */assert_param(IS_BKP_DR(BKP_DR));tmp = (uint32_t)BKP_BASE;tmp += BKP_DR;*(__IO uint32_t *) tmp = Data;}/*** @brief Reads data from the specified Data Backup Register.* @param BKP_DR: specifies the Data Backup Register.* This parameter can be BKP_DRx where x:[1, 42]* @retval The content of the specified Data Backup Register*/uint16_t BKP_ReadBackupRegister(uint16_t BKP_DR){__IO uint32_t tmp = 0;/* Check the parameters */assert_param(IS_BKP_DR(BKP_DR));tmp = (uint32_t)BKP_BASE;tmp += BKP_DR;return (*(__IO uint16_t *) tmp);}/*** @brief Checks whether the Tamper Pin Event flag is set or not.* @param None* @retval The new state of the Tamper Pin Event flag (SET or RESET).*/FlagStatus BKP_GetFlagStatus(void){return (FlagStatus)(*(__IO uint32_t *) CSR_TEF_BB);}/*** @brief Clears Tamper Pin Event pending flag.* @param None* @retval None*/void BKP_ClearFlag(void){/* Set CTE bit to clear Tamper Pin Event flag */BKP->CSR |= CSR_CTE_Set;}/*** @brief Checks whether the Tamper Pin Interrupt has occurred or not.* @param None* @retval The new state of the Tamper Pin Interrupt (SET or RESET).*/ITStatus BKP_GetITStatus(void){return (ITStatus)(*(__IO uint32_t *) CSR_TIF_BB);}/*** @brief Clears Tamper Pin Interrupt pending bit.* @param None* @retval None*/void BKP_ClearITPendingBit(void){/* Set CTI bit to clear Tamper Pin Interrupt pending bit */BKP->CSR |= CSR_CTI_Set;}/*** @}*//*** @}*//*** @}*//******************* (C) COPYRIGHT 2009 STMicroelectronics *****END OF FILE****/