273 lines
11 KiB
C
273 lines
11 KiB
C
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/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
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* File Name : stm32f10x_bkp.c
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* Author : MCD Application Team
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* Version : V2.0.3
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* Date : 09/22/2008
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* Description : This file provides all the BKP firmware functions.
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********************************************************************************
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* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
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* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
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* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
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* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
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* CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
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* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
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*******************************************************************************/
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/* Includes ------------------------------------------------------------------*/
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#include "stm32f10x_bkp.h"
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#include "stm32f10x_rcc.h"
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* ------------ BKP registers bit address in the alias region ----------- */
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#define BKP_OFFSET (BKP_BASE - PERIPH_BASE)
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/* --- CR Register ---*/
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/* Alias word address of TPAL bit */
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#define CR_OFFSET (BKP_OFFSET + 0x30)
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#define TPAL_BitNumber 0x01
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#define CR_TPAL_BB (PERIPH_BB_BASE + (CR_OFFSET * 32) + (TPAL_BitNumber * 4))
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/* Alias word address of TPE bit */
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#define TPE_BitNumber 0x00
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#define CR_TPE_BB (PERIPH_BB_BASE + (CR_OFFSET * 32) + (TPE_BitNumber * 4))
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/* --- CSR Register ---*/
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/* Alias word address of TPIE bit */
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#define CSR_OFFSET (BKP_OFFSET + 0x34)
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#define TPIE_BitNumber 0x02
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#define CSR_TPIE_BB (PERIPH_BB_BASE + (CSR_OFFSET * 32) + (TPIE_BitNumber * 4))
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/* Alias word address of TIF bit */
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#define TIF_BitNumber 0x09
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#define CSR_TIF_BB (PERIPH_BB_BASE + (CSR_OFFSET * 32) + (TIF_BitNumber * 4))
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/* Alias word address of TEF bit */
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#define TEF_BitNumber 0x08
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#define CSR_TEF_BB (PERIPH_BB_BASE + (CSR_OFFSET * 32) + (TEF_BitNumber * 4))
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/* ---------------------- BKP registers bit mask ------------------------ */
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/* RTCCR register bit mask */
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#define RTCCR_CAL_Mask ((u16)0xFF80)
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#define RTCCR_Mask ((u16)0xFC7F)
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/* CSR register bit mask */
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#define CSR_CTE_Set ((u16)0x0001)
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#define CSR_CTI_Set ((u16)0x0002)
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private function prototypes -----------------------------------------------*/
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/* Private functions ---------------------------------------------------------*/
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/*******************************************************************************
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* Function Name : BKP_DeInit
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* Description : Deinitializes the BKP peripheral registers to their default
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* reset values.
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* Input : None
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* Output : None
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* Return : None
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*******************************************************************************/
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void BKP_DeInit(void)
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{
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RCC_BackupResetCmd(ENABLE);
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RCC_BackupResetCmd(DISABLE);
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}
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/*******************************************************************************
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* Function Name : BKP_TamperPinLevelConfig
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* Description : Configures the Tamper Pin active level.
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* Input : - BKP_TamperPinLevel: specifies the Tamper Pin active level.
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* This parameter can be one of the following values:
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* - BKP_TamperPinLevel_High: Tamper pin active on high level
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* - BKP_TamperPinLevel_Low: Tamper pin active on low level
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* Output : None
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* Return : None
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*******************************************************************************/
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void BKP_TamperPinLevelConfig(u16 BKP_TamperPinLevel)
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{
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/* Check the parameters */
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assert_param(IS_BKP_TAMPER_PIN_LEVEL(BKP_TamperPinLevel));
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*(vu32 *) CR_TPAL_BB = BKP_TamperPinLevel;
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}
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/*******************************************************************************
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* Function Name : BKP_TamperPinCmd
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* Description : Enables or disables the Tamper Pin activation.
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* Input : - NewState: new state of the Tamper Pin activation.
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* This parameter can be: ENABLE or DISABLE.
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* Output : None
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* Return : None
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*******************************************************************************/
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void BKP_TamperPinCmd(FunctionalState NewState)
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{
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/* Check the parameters */
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assert_param(IS_FUNCTIONAL_STATE(NewState));
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*(vu32 *) CR_TPE_BB = (u32)NewState;
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}
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/*******************************************************************************
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* Function Name : BKP_ITConfig
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* Description : Enables or disables the Tamper Pin Interrupt.
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* Input : - NewState: new state of the Tamper Pin Interrupt.
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* This parameter can be: ENABLE or DISABLE.
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* Output : None
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* Return : None
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*******************************************************************************/
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void BKP_ITConfig(FunctionalState NewState)
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{
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/* Check the parameters */
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assert_param(IS_FUNCTIONAL_STATE(NewState));
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*(vu32 *) CSR_TPIE_BB = (u32)NewState;
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}
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/*******************************************************************************
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* Function Name : BKP_RTCOutputConfig
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* Description : Select the RTC output source to output on the Tamper pin.
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* Input : - BKP_RTCOutputSource: specifies the RTC output source.
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* This parameter can be one of the following values:
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* - BKP_RTCOutputSource_None: no RTC output on the Tamper pin.
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* - BKP_RTCOutputSource_CalibClock: output the RTC clock
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* with frequency divided by 64 on the Tamper pin.
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* - BKP_RTCOutputSource_Alarm: output the RTC Alarm pulse
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* signal on the Tamper pin.
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* - BKP_RTCOutputSource_Second: output the RTC Second pulse
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* signal on the Tamper pin.
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* Output : None
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* Return : None
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*******************************************************************************/
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void BKP_RTCOutputConfig(u16 BKP_RTCOutputSource)
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{
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u16 tmpreg = 0;
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/* Check the parameters */
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assert_param(IS_BKP_RTC_OUTPUT_SOURCE(BKP_RTCOutputSource));
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tmpreg = BKP->RTCCR;
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/* Clear CCO, ASOE and ASOS bits */
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tmpreg &= RTCCR_Mask;
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/* Set CCO, ASOE and ASOS bits according to BKP_RTCOutputSource value */
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tmpreg |= BKP_RTCOutputSource;
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/* Store the new value */
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BKP->RTCCR = tmpreg;
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}
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/*******************************************************************************
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* Function Name : BKP_SetRTCCalibrationValue
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* Description : Sets RTC Clock Calibration value.
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* Input : - CalibrationValue: specifies the RTC Clock Calibration value.
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* This parameter must be a number between 0 and 0x7F.
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* Output : None
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* Return : None
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*******************************************************************************/
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void BKP_SetRTCCalibrationValue(u8 CalibrationValue)
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{
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u16 tmpreg = 0;
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/* Check the parameters */
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assert_param(IS_BKP_CALIBRATION_VALUE(CalibrationValue));
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tmpreg = BKP->RTCCR;
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/* Clear CAL[6:0] bits */
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tmpreg &= RTCCR_CAL_Mask;
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/* Set CAL[6:0] bits according to CalibrationValue value */
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tmpreg |= CalibrationValue;
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/* Store the new value */
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BKP->RTCCR = tmpreg;
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}
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/*******************************************************************************
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* Function Name : BKP_WriteBackupRegister
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* Description : Writes user data to the specified Data Backup Register.
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* Input : - BKP_DR: specifies the Data Backup Register.
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* This parameter can be BKP_DRx where x:[1, 42]
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* - Data: data to write
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* Output : None
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* Return : None
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*******************************************************************************/
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void BKP_WriteBackupRegister(u16 BKP_DR, u16 Data)
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{
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/* Check the parameters */
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assert_param(IS_BKP_DR(BKP_DR));
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*(vu16 *) (BKP_BASE + BKP_DR) = Data;
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}
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/*******************************************************************************
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* Function Name : BKP_ReadBackupRegister
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* Description : Reads data from the specified Data Backup Register.
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* Input : - BKP_DR: specifies the Data Backup Register.
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* This parameter can be BKP_DRx where x:[1, 42]
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* Output : None
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* Return : The content of the specified Data Backup Register
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*******************************************************************************/
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u16 BKP_ReadBackupRegister(u16 BKP_DR)
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{
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/* Check the parameters */
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assert_param(IS_BKP_DR(BKP_DR));
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return (*(vu16 *) (BKP_BASE + BKP_DR));
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}
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/*******************************************************************************
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* Function Name : BKP_GetFlagStatus
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* Description : Checks whether the Tamper Pin Event flag is set or not.
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* Input : None
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* Output : None
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* Return : The new state of the Tamper Pin Event flag (SET or RESET).
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*******************************************************************************/
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FlagStatus BKP_GetFlagStatus(void)
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{
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return (FlagStatus)(*(vu32 *) CSR_TEF_BB);
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}
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/*******************************************************************************
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* Function Name : BKP_ClearFlag
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* Description : Clears Tamper Pin Event pending flag.
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* Input : None
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* Output : None
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* Return : None
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*******************************************************************************/
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void BKP_ClearFlag(void)
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{
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/* Set CTE bit to clear Tamper Pin Event flag */
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BKP->CSR |= CSR_CTE_Set;
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}
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/*******************************************************************************
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* Function Name : BKP_GetITStatus
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* Description : Checks whether the Tamper Pin Interrupt has occurred or not.
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* Input : None
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* Output : None
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* Return : The new state of the Tamper Pin Interrupt (SET or RESET).
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*******************************************************************************/
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ITStatus BKP_GetITStatus(void)
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{
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return (ITStatus)(*(vu32 *) CSR_TIF_BB);
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}
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/*******************************************************************************
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* Function Name : BKP_ClearITPendingBit
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* Description : Clears Tamper Pin Interrupt pending bit.
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* Input : None
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* Output : None
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* Return : None
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*******************************************************************************/
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void BKP_ClearITPendingBit(void)
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{
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/* Set CTI bit to clear Tamper Pin Interrupt pending bit */
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BKP->CSR |= CSR_CTI_Set;
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}
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/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/
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