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/********************************** (C) COPYRIGHT *******************************
* File Name : ch32v10x_bkp.c
* Author : WCH
* Version : V1.0.0
* Date : 2020/04/30
* Description : This file provides all the BKP firmware functions.
* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
* SPDX-License-Identifier: Apache-2.0
*******************************************************************************/
#include "ch32v10x_bkp.h"
#include "ch32v10x_rcc.h"
/* BKP registers bit mask */
/* OCTLR register bit mask */
#define OCTLR_CAL_MASK ((uint16_t)0xFF80)
#define OCTLR_MASK ((uint16_t)0xFC7F)
/*********************************************************************
* @fn BKP_DeInit
*
* @brief Deinitializes the BKP peripheral registers to their default reset values.
*
* @return none
*/
void BKP_DeInit(void)
{
RCC_BackupResetCmd(ENABLE);
RCC_BackupResetCmd(DISABLE);
}
/*********************************************************************
* @fn BKP_TamperPinLevelConfig
*
* @brief Configures the Tamper Pin active level.
*
* @param BKP_TamperPinLevel: specifies the Tamper Pin active level.
* BKP_TamperPinLevel_High - Tamper pin active on high level.
* BKP_TamperPinLevel_Low - Tamper pin active on low level.
*
* @return none
*/
void BKP_TamperPinLevelConfig(uint16_t BKP_TamperPinLevel)
{
if(BKP_TamperPinLevel)
{
BKP->TPCTLR |= (1 << 1);
}
else
{
BKP->TPCTLR &= ~(1 << 1);
}
}
/*********************************************************************
* @fn BKP_TamperPinCmd
*
* @brief Enables or disables the Tamper Pin activation.
*
* @param NewState - ENABLE or DISABLE.
*
* @return none
*/
void BKP_TamperPinCmd(FunctionalState NewState)
{
if(NewState)
{
BKP->TPCTLR |= (1 << 0);
}
else
{
BKP->TPCTLR &= ~(1 << 0);
}
}
/*********************************************************************
* @fn BKP_ITConfig
*
* @brief Enables or disables the Tamper Pin Interrupt.
*
* @param NewState - ENABLE or DISABLE.
*
* @return none
*/
void BKP_ITConfig(FunctionalState NewState)
{
if(NewState)
{
BKP->TPCSR |= (1 << 2);
}
else
{
BKP->TPCSR &= ~(1 << 2);
}
}
/*********************************************************************
* @fn BKP_RTCOutputConfig
*
* @brief Select the RTC output source to output on the Tamper pin.
*
* @param BKP_RTCOutputSource - specifies the RTC output source.
* 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.
*
* @return none
*/
void BKP_RTCOutputConfig(uint16_t BKP_RTCOutputSource)
{
uint16_t tmpreg = 0;
tmpreg = BKP->OCTLR;
tmpreg &= OCTLR_MASK;
tmpreg |= BKP_RTCOutputSource;
BKP->OCTLR = tmpreg;
}
/*********************************************************************
* @fn BKP_SetRTCCalibrationValue
*
* @brief Sets RTC Clock Calibration value.
*
* @param CalibrationValue - specifies the RTC Clock Calibration value.
* This parameter must be a number between 0 and 0x1F.
*
* @return none
*/
void BKP_SetRTCCalibrationValue(uint8_t CalibrationValue)
{
uint16_t tmpreg = 0;
tmpreg = BKP->OCTLR;
tmpreg &= OCTLR_CAL_MASK;
tmpreg |= CalibrationValue;
BKP->OCTLR = tmpreg;
}
/*********************************************************************
* @fn BKP_WriteBackupRegister
*
* @brief Writes user data to the specified Data Backup Register.
*
* @param BKP_DR - specifies the Data Backup Register.
* Data - data to write.
*
* @return none
*/
void BKP_WriteBackupRegister(uint16_t BKP_DR, uint16_t Data)
{
__IO uint32_t tmp = 0;
tmp = (uint32_t)BKP_BASE;
tmp += BKP_DR;
*(__IO uint32_t *)tmp = Data;
}
/*********************************************************************
* @fn BKP_ReadBackupRegister
*
* @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].
*
* @return none
*/
uint16_t BKP_ReadBackupRegister(uint16_t BKP_DR)
{
__IO uint32_t tmp = 0;
tmp = (uint32_t)BKP_BASE;
tmp += BKP_DR;
return (*(__IO uint16_t *)tmp);
}
/*********************************************************************
* @fn BKP_GetFlagStatus
*
* @brief Checks whether the Tamper Pin Event flag is set or not.
*
* @return FlagStatus - SET or RESET.
*/
FlagStatus BKP_GetFlagStatus(void)
{
if(BKP->TPCSR & (1 << 8))
{
return SET;
}
else
{
return RESET;
}
}
/*********************************************************************
* @fn BKP_ClearFlag
*
* @brief Clears Tamper Pin Event pending flag.
*
* @return none
*/
void BKP_ClearFlag(void)
{
BKP->TPCSR |= BKP_CTE;
}
/*********************************************************************
* @fn BKP_GetITStatus
*
* @brief Checks whether the Tamper Pin Interrupt has occurred or not.
*
* @return ITStatus - SET or RESET.
*/
ITStatus BKP_GetITStatus(void)
{
if(BKP->TPCSR & (1 << 9))
{
return SET;
}
else
{
return RESET;
}
}
/*********************************************************************
* @fn BKP_ClearITPendingBit
*
* @brief Clears Tamper Pin Interrupt pending bit.
*
* @return none
*/
void BKP_ClearITPendingBit(void)
{
BKP->TPCSR |= BKP_CTI;
}
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