Subversion Repositories openrisc_2011-10-31

/******************** (C) COPYRIGHT 2007 STMicroelectronics ********************

* File Name          : stm32f10x_bkp.c

* Author             : MCD Application Team

* Date First Issued  : 09/29/2006

* Description        : This file provides all the BKP firmware functions.

********************************************************************************

* History:

* 04/02/2007: V0.2

* 02/05/2007: V0.1

* 09/29/2006: V0.01

********************************************************************************

* THE PRESENT SOFTWARE 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 SOFTWARE 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)

/* --- RTCCR Register ---*/

/* Alias word address of CCO bit */

#define RTCCR_OFFSET      (BKP_OFFSET + 0x2C)

#define CCO_BitNumber     0x07

#define RTCCR_CCO_BB      (PERIPH_BB_BASE + (RTCCR_OFFSET * 32) + (CCO_BitNumber * 4))

/* --- 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    ((u16)0xFF80)

/* CSR register bit mask */

#define CSR_CTE_Set       ((u16)0x0001)

#define CSR_CTI_Set       ((u16)0x0002)

/* 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

*******************************************************************************/

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

*******************************************************************************/

void BKP_TamperPinLevelConfig(u16 BKP_TamperPinLevel)

{

  /* Check the parameters */

  assert(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

*******************************************************************************/

void BKP_TamperPinCmd(FunctionalState NewState)

{

  /* Check the parameters */

  assert(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

*******************************************************************************/

void BKP_ITConfig(FunctionalState NewState)

{

  /* Check the parameters */

  assert(IS_FUNCTIONAL_STATE(NewState));

  *(vu32 *) CSR_TPIE_BB = (u32)NewState;

}

/*******************************************************************************

* Function Name  : BKP_RTCCalibrationClockOutputCmd

* Description    : Enables or disables the output of the Calibration Clock.

* Input          : - NewState: new state of the Calibration Clock output.

*                    This parameter can be: ENABLE or DISABLE.

* Output         : None

* Return         : None

*******************************************************************************/

void BKP_RTCCalibrationClockOutputCmd(FunctionalState NewState)

{

  /* Check the parameters */

  assert(IS_FUNCTIONAL_STATE(NewState));

  *(vu32 *) RTCCR_CCO_BB = (u32)NewState;

}

/*******************************************************************************

* 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

*******************************************************************************/

void BKP_SetRTCCalibrationValue(u8 CalibrationValue)

{

  u16 tmpreg = 0;

  /* Check the parameters */

  assert(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, 10]

*                  - Data: data to write

* Output         : None

* Return         : None

*******************************************************************************/

void BKP_WriteBackupRegister(u16 BKP_DR, u16 Data)

{

  /* Check the parameters */

  assert(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, 10]

* Output         : None

* Return         : The content of the specified Data Backup Register

*******************************************************************************/

u16 BKP_ReadBackupRegister(u16 BKP_DR)

{

  /* Check the parameters */

  assert(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).

*******************************************************************************/

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

*******************************************************************************/

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).

*******************************************************************************/

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

*******************************************************************************/

void BKP_ClearITPendingBit(void)

{

  /* Set CTI bit to clear Tamper Pin Interrupt pending bit */

  BKP->CSR |= CSR_CTI_Set;

}

/******************* (C) COPYRIGHT 2007 STMicroelectronics *****END OF FILE****/