/**
  ******************************************************************************
  * @file    PWR/PWR_STOP/Src/stm32f0xx_hal_msp.c
  * @author  MCD Application Team
  * @brief   HAL MSP module.
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2016 STMicroelectronics.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by ST under BSD 3-Clause license,
  * the "License"; You may not use this file except in compliance with the
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "main.h"

/** @addtogroup STM32F0xx_HAL_Examples
  * @{
  */

/** @defgroup PWR_STOP
  * @{
  */

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/

/** @defgroup HAL_MSP_Private_Functions
  * @{
  */

/**
  * @brief RTC MSP Initialization
  *        This function configures the hardware resources used in this example
  * @param hrtc: RTC handle pointer
  * 
  * @note  Care must be taken when HAL_RCCEx_PeriphCLKConfig() is used to select 
  *        the RTC clock source; in this case the Backup domain will be reset in  
  *        order to modify the RTC Clock source, as consequence RTC registers (including 
  *        the backup registers) and RCC_BDCR register are set to their reset values.
  *             
  * @retval None
  */
void HAL_RTC_MspInit(RTC_HandleTypeDef *hrtc)
{
  RCC_OscInitTypeDef RCC_OscInitStruct;
  RCC_PeriphCLKInitTypeDef  PeriphClkInitStruct;

  /*##-1- Configue LSE as RTC clock soucre ###################################*/ 
#ifdef RTC_CLOCK_SOURCE_LSE
    
  RCC_OscInitStruct.OscillatorType =  RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
  RCC_OscInitStruct.LSEState = RCC_LSE_ON;
  RCC_OscInitStruct.LSIState = RCC_LSI_OFF;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }
  
  PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_RTC;
  PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSE;
  if(HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
  { 
    Error_Handler();
  }
#elif defined (RTC_CLOCK_SOURCE_LSI)
  RCC_OscInitStruct.OscillatorType =  RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
  RCC_OscInitStruct.LSIState = RCC_LSI_ON;
  RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }

  PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_RTC;
  PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSI;
  if(HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
  { 
    Error_Handler();
  }
#else
#error Please select the RTC Clock source inside the main.h file
#endif /*RTC_CLOCK_SOURCE_LSE*/

  /*##-2- Enable RTC peripheral Clocks #######################################*/ 
  /* Enable RTC Clock */
  __HAL_RCC_RTC_ENABLE();

  /*##-4- Configure the NVIC for RTC_IRQn  #########################*/
  HAL_NVIC_SetPriority(RTC_IRQn, 0x03, 0);
  HAL_NVIC_EnableIRQ(RTC_IRQn);
}

/**
  * @brief RTC MSP De-Initialization
  *        This function freeze the hardware resources used in this example:
  *          - Disable the Peripheral's clock
  * @param hrtc: RTC handle pointer
  * @retval None
  */
void HAL_RTC_MspDeInit(RTC_HandleTypeDef *hrtc)
{
  /*##-1- Reset peripherals ##################################################*/
  __HAL_RCC_RTC_DISABLE();
}

/**
  * @}
  */

/**
  * @}
  */

/**
  * @}
  */

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