分类： 嵌入式
2012-02-13 17:02:54
/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
* File Name : stm32f10x_bkp.c
* Author : MCD Application Team
* Version : V2.0.1
* Date : 06/13/2008
* Description : This file provides all the BKP firmware functions.
********************************************************************************
* 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.
*******************************************************************************/
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_bkp.h"
#include "stm32f10x_rcc.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* ------------ BKP registers bit address in the alias region ----------- */
#define BKP_OFFSET (BKP_BASE - PERIPH_BASE) //得到在位带区的偏移量地址
/* --- CR Register ---*/
/* Alias word address of TPAL bit */
#define CR_OFFSET (BKP_OFFSET + 0x30)//BKP_CR寄存器的相对偏移量
#define TPAL_BitNumber 0x01//宏定义TPAL_BitNumber位为BKP_CR寄存器的位1
#define CR_TPAL_BB (PERIPH_BB_BASE + (CR_OFFSET * 32) + (TPAL_BitNumber * 4))
//BKP_CR寄存器的TPAL位在别名位带区的地址
/* Alias word address of TPE bit */
#define TPE_BitNumber 0x00//宏定义TPE_BitNumber位为BKP_CR寄存器的位0
#define CR_TPE_BB (PERIPH_BB_BASE + (CR_OFFSET * 32) + (TPE_BitNumber * 4))
//BKP_CR寄存器的TPE位在别名位带区的地址
/* --- CSR Register ---*/
/* Alias word address of TPIE bit */
#define CSR_OFFSET (BKP_OFFSET + 0x34)// BKP_CSR寄存器的相对偏移量
#define TPIE_BitNumber 0x02 //宏定义TPAL_BitNumber位为BKP_CSR寄存器的位 2
#define CSR_TPIE_BB (PERIPH_BB_BASE + (CSR_OFFSET * 32) + (TPIE_BitNumber * 4))
//BKP_CSR寄存器的TPIE位在别名位带区的地址
/* Alias word address of TIF bit */
#define TIF_BitNumber 0x09 //宏定义TIF_BitNumber位为BKP_CSR寄存器的位 9
#define CSR_TIF_BB (PERIPH_BB_BASE + (CSR_OFFSET * 32) + (TIF_BitNumber * 4))
//BKP_CSR寄存器的TIF位在别名位带区的地址
/* Alias word address of TEF bit */
#define TEF_BitNumber 0x08 //宏定义TEF_BitNumber位为BKP_CSR寄存器的位 8
#define CSR_TEF_BB (PERIPH_BB_BASE + (CSR_OFFSET * 32) + (TEF_BitNumber * 4))
//BKP_CSR寄存器的TEF位在别名位带区的地址
/* ---------------------- BKP registers bit mask ------------------------ */
/* RTCCR register bit mask */
#define RTCCR_CAL_Mask ((u16)0xFF80) //对时钟校准寄存器的校准值的配置
#define RTCCR_Mask ((u16)0xFC7F) //对时钟校准寄存器的配置
/* CSR register bit mask */
#define CSR_CTE_Set ((u16)0x0001)
//配置BKP_CSR时，清除TEF侵入检测事件标志(并复位侵入检测器)。
#define CSR_CTI_Set ((u16)0x0002)
//配置BKP_CSR时，清除侵入检测中断和TIF侵入检测中断标志
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/*******************************************************************************
* Function Name : BKP_DeInit
* Description : Deinitializes the BKP peripheral registers to their default
* reset values.
* Input : None
* Output : None
* Return : None
*******************************************************************************
//通过设置备份域控制寄存器(RCC_BDCR)，来复位整个备份域
void BKP_DeInit(void)
{
RCC_BackupResetCmd(ENABLE);
RCC_BackupResetCmd(DISABLE);
}
/*******************************************************************************
* Function Name : BKP_TamperPinLevelConfig
* Description : Configures the Tamper Pin active level.
* Input : - BKP_TamperPinLevel: specifies the Tamper Pin active level.
* This parameter can be one of the following values:
* - BKP_TamperPinLevel_High: Tamper pin active on high level
* - BKP_TamperPinLevel_Low: Tamper pin active on low level
* Output : None
* Return : None
*******************************************************************************
//通过设置BKP_CR的TPAL位来设置侵入检测TAMPER引脚有效电平。
void BKP_TamperPinLevelConfig(u16 BKP_TamperPinLevel)
{
/* Check the parameters */
assert_param(IS_BKP_TAMPER_PIN_LEVEL(BKP_TamperPinLevel));
*(vu32 *) CR_TPAL_BB = BKP_TamperPinLevel;
}
/*******************************************************************************
* Function Name : BKP_TamperPinCmd
* Description : Enables or disables the Tamper Pin activation.
* Input : - NewState: new state of the Tamper Pin activation.
* This parameter can be: ENABLE or DISABLE.
* Output : None
* Return : None
*******************************************************************************
//通过设置BKP_CR的TPE位来使能/失能侵入检测TAMPER引脚。
void BKP_TamperPinCmd(FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_FUNCTIONAL_STATE(NewState));
*(vu32 *) CR_TPE_BB = (u32)NewState;
}
/*******************************************************************************
* Function Name : BKP_ITConfig
* Description : Enables or disables the Tamper Pin Interrupt.
* Input : - NewState: new state of the Tamper Pin Interrupt.
* This parameter can be: ENABLE or DISABLE.
* Output : None
* Return : None
*******************************************************************************
//通过设置BKP_CSR的TPIE位来使能/失能侵入TAMPER引脚中断.
void BKP_ITConfig(FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_FUNCTIONAL_STATE(NewState));
*(vu32 *) CSR_TPIE_BB = (u32)NewState;
}
/*******************************************************************************
* Function Name : BKP_RTCOutputConfig
* Description : Select the RTC output source to output on the Tamper pin.
* Input : - BKP_RTCOutputSource: specifies the RTC output source.
* This parameter can be one of the following values:
* - BKP_RTCOutputSource_None: no RTC output on the Tamper pin.
* - BKP_RTCOutputSource_CalibClock: output the RTC clock
* with frequency divided by 64 on the Tamper pin.
* - BKP_RTCOutputSource_Alarm: output the RTC Alarm pulse
* signal on the Tamper pin.
* - BKP_RTCOutputSource_Second: output the RTC Second pulse
* signal on the Tamper pin.
* Output : None
* Return : None
*******************************************************************************
//设置BKP_RTCCR的输出选择
void BKP_RTCOutputConfig(u16 BKP_RTCOutputSource)
{
u16 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;
}
/*******************************************************************************
* Function Name : BKP_SetRTCCalibrationValue
* Description : Sets RTC Clock Calibration value.
* Input : - CalibrationValue: specifies the RTC Clock Calibration value.
* This parameter must be a number between 0 and 0x7F.
* Output : None
* Return : None
*******************************************************************************
// 通过设置BKP_RTCCR来设置校准时钟输出
void BKP_SetRTCCalibrationValue(u8 CalibrationValue)
{
u16 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;
}
/*******************************************************************************
* Function Name : BKP_WriteBackupRegister
* Description : Writes user data to the specified Data Backup Register.
* Input : - BKP_DR: specifies the Data Backup Register.
* This parameter can be BKP_DRx where x:[1, 42]
* - Data: data to write
* Output : None
* Return : None
*******************************************************************************
//将数据写入指定备份数据寄存器
void BKP_WriteBackupRegister(u16 BKP_DR, u16 Data)
{
/* Check the parameters */
assert_param(IS_BKP_DR(BKP_DR));
*(vu16 *) (BKP_BASE + BKP_DR) = Data;
}
/*******************************************************************************
* Function Name : BKP_ReadBackupRegister
* Description : Reads data from the specified Data Backup Register.
* Input : - BKP_DR: specifies the Data Backup Register.
* This parameter can be BKP_DRx where x:[1, 42]
* Output : None
* Return : The content of the specified Data Backup Register
*******************************************************************************
//将指定的数据寄存器内的数据读出
u16 BKP_ReadBackupRegister(u16 BKP_DR)
{
/* Check the parameters */
assert_param(IS_BKP_DR(BKP_DR));
return (*(vu16 *) (BKP_BASE + BKP_DR));
}
/*******************************************************************************
* Function Name : BKP_GetFlagStatus
* Description : Checks whether the Tamper Pin Event flag is set or not.
* Input : None
* Output : None
* Return : The new state of the Tamper Pin Event flag (SET or RESET).
*******************************************************************************
//获取BKP_CSR中TEF即侵入事件标志(Tamper event flag)位的值
FlagStatus BKP_GetFlagStatus(void)
{
return (FlagStatus)(*(vu32 *) CSR_TEF_BB);
}
/*******************************************************************************
* Function Name : BKP_ClearFlag
* Description : Clears Tamper Pin Event pending flag.
* Input : None
* Output : None
* Return : None
*******************************************************************************
//清除侵入检测事件(Clear tamper event) 位
void BKP_ClearFlag(void)
{
/* Set CTE bit to clear Tamper Pin Event flag */
BKP->CSR |= CSR_CTE_Set;
}
/*******************************************************************************
* Function Name : BKP_GetITStatus
* Description : Checks whether the Tamper Pin Interrupt has occurred or not.
* Input : None
* Output : None
* Return : The new state of the Tamper Pin Interrupt (SET or RESET).
*******************************************************************************
//获取BKP_CSR中TIF即侵入中断标志(Tamper interrupt flag)位
ITStatus BKP_GetITStatus(void)
{
return (ITStatus)(*(vu32 *) CSR_TIF_BB);
}
/*******************************************************************************
* Function Name : BKP_ClearITPendingBit
* Description : Clears Tamper Pin Interrupt pending bit.
* Input : None
* Output : None
* Return : None
*******************************************************************************
//清除侵入检测中断(Clear tamper interrupt)位
void BKP_ClearITPendingBit(void)
{
/* Set CTI bit to clear Tamper Pin Interrupt pending bit */
BKP->CSR |= CSR_CTI_Set;
}
/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/
