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 * Copyright (c) 2022, Nations Technologies Inc.
 *
 * All rights reserved.
 * ****************************************************************************
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 *
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/**
 * @file User_RTCBKP_Config.c
 * @author Nations
 * @version V1.2.2
 *
 * @copyright Copyright (c) 2022, Nations Technologies Inc. All rights reserved.
 */
#include "n32g43x.h"
#include "n32g43x_rtc.h"
#include "User_RTCBKP_Config.h"


/** @addtogroup BKP
 * @brief BKP driver modules
 * @{
 */

/**
 * @brief RTC Backup Initialize.
 */
void User_RTCBKP_Init(void)
{
    RCC_EnableAPB1PeriphClk(RCC_APB1_PERIPH_PWR, ENABLE);
    /* Allow access to RTC */
    PWR_BackupAccessEnable(ENABLE);
    RCC_EnableRtcClk(DISABLE);
    /* Enable the LSE OSC32_IN PC14 
       LSI is turned off here to ensure that only one clock is turned on */
    RCC_EnableLsi(DISABLE);  
    RCC_ConfigLse(RCC_LSE_ENABLE,0x1FF);
    while (RCC_GetFlagStatus(RCC_LDCTRL_FLAG_LSERD) == RESET){}
    RCC_ConfigRtcClk(RCC_RTCCLK_SRC_LSE);
    /* Enable the RTC Clock */
    RCC_EnableRtcClk(ENABLE);
    RTC_WaitForSynchro();
}

/**
 * @brief  Writes user data to the specified Data Backup Register.
 * @param BKP_DAT specifies the Data Backup Register.
 *   This parameter can be BKP_DATx where x:[1, 20]
 * @param Data data to write
 */
void BKP_WriteBkpData(uint32_t BKP_DAT, uint32_t Data)
{
    __IO uint32_t tmp = 0;
    /* Check the parameters */
    assert_param(IS_BKP_DAT(BKP_DAT));
    tmp = (uint32_t)&RTC->BKP1R;
    tmp += BKP_DAT;
    *(__IO uint32_t*)tmp = Data;
}

/**
 * @brief  Reads data from the specified Data Backup Register.
 * @param BKP_DAT specifies the Data Backup Register.
 *   This parameter can be BKP_DATx where x:[1, 20]
 * @return The content of the specified Data Backup Register
 */
uint32_t BKP_ReadBkpData(uint32_t BKP_DAT)
{
    __IO uint32_t tmp = 0;
    uint32_t value = 0;
    /* Check the parameters */
    assert_param(IS_BKP_DAT(BKP_DAT));
    tmp = (uint32_t)&RTC->BKP1R;
    tmp += BKP_DAT;
    value = (*(__IO uint32_t*)tmp);
    return value;
}

