/**
 *
 * @copyright &copy; 2010 - 2020, Fraunhofer-Gesellschaft zur Foerderung der
 *  angewandten Forschung e.V. All rights reserved.
 *
 * BSD 3-Clause License
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 * modification, are permitted provided that the following conditions are met:
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 *     contributors may be used to endorse or promote products derived from
 *     this software without specific prior written permission.
 *
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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/**
 * @file    bkpsram.c
 * @author  foxBMS Team
 * @date    20.11.2015 (date of creation)
 * @ingroup DRIVERS
 * @prefix  BKP_SRAM
 *
 * @brief   Driver for static backup RAM
 *
 */


/*================== Includes =============================================*/
#include "bkpsram.h"

#include "rtc.h"

/*================== Macros and Definitions ===============================*/

/*================== Constant and Variable Definitions ====================*/

/*================== Function Prototypes ==================================*/

/*================== Function Implementations =============================*/

void BKP_SRAM_Init(void) {
#ifdef BKP_SRAM_ENABLE
    /* Enable PWR clock */
    RCC->APB1ENR |= RCC_APB1ENR_PWREN;

    /* Allow access to backup domain */
    HAL_PWR_EnableBkUpAccess();

    /* Enable backup SRAM CLK */
    RCC->AHB1ENR |= RCC_AHB1ENR_BKPSRAMEN;

    /* Enable low power Regulator */
    HAL_PWREx_EnableBkUpReg();

    if (RTC_BKPSRAM_DATAVALID_VARIABLE == 0) {
        /* @todo: clear BKP_SRAM Values? */
        RTC_BKPSRAM_DATAVALID_VARIABLE = 1;
    }

#endif
}
