/**
  ******************************************************************************
  * @file    stm32f4xx_hal_flash_ex.c
  * @author  MCD Application Team
  * @version V1.1.0
  * @date    19-June-2014
  * @brief   Extended FLASH HAL module driver.
  *          This file provides firmware functions to manage the following 
  *          functionalities of the FLASH extension peripheral:
  *           + Extended programming operations functions
  *  
  @verbatim
  ==============================================================================
                   ##### Flash Extension features #####
  ==============================================================================
           
  [..] Comparing to other previous devices, the FLASH interface for STM32F427xx/437xx and 
       STM32F429xx/439xx devices contains the following additional features 
       
       (+) Capacity up to 2 Mbyte with dual bank architecture supporting read-while-write
           capability (RWW)
       (+) Dual bank memory organization       
       (+) PCROP protection for all banks
   
                      ##### How to use this driver #####
  ==============================================================================
  [..] This driver provides functions to configure and program the FLASH memory 
       of all STM32F427xx/437xx andSTM32F429xx/439xx devices. It includes
      (#) FLASH Memory Erase functions: 
           (++) Lock and Unlock the FLASH interface using HAL_FLASH_Unlock() and 
                HAL_FLASH_Lock() functions
           (++) Erase function: Erase sector, erase all sectors
           (++) There are two modes of erase :
             (+++) Polling Mode using HAL_FLASHEx_Erase()
             (+++) Interrupt Mode using HAL_FLASHEx_Erase_IT()
             
      (#) Option Bytes Programming functions: Use HAL_FLASHEx_OBProgram() to :
           (++) Set/Reset the write protection
           (++) Set the Read protection Level
           (++) Set the BOR level
           (++) Program the user Option Bytes
      (#) Advanced Option Bytes Programming functions: Use HAL_FLASHEx_AdvOBProgram() to :  
       (++) Extended space (bank 2) erase function
       (++) Full FLASH space (2 Mo) erase (bank 1 and bank 2)
       (++) Dual Boot actrivation
       (++) Write protection configuration for bank 2
       (++) PCROP protection configuration and control for both banks
  
  @endverbatim
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
  *
  * Redistribution and use in source and binary forms, with or without modification,
  * are permitted provided that the following conditions are met:
  *   1. Redistributions of source code must retain the above copyright notice,
  *      this list of conditions and the following disclaimer.
  *   2. Redistributions in binary form must reproduce the above copyright notice,
  *      this list of conditions and the following disclaimer in the documentation
  *      and/or other materials provided with the distribution.
  *   3. Neither the name of STMicroelectronics nor the names of its contributors
  *      may be used to endorse or promote products derived from this software
  *      without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  ******************************************************************************
  */ 

/* Includes ------------------------------------------------------------------*/
#include "stm32f4xx_hal.h"

/** @addtogroup STM32F4xx_HAL_Driver
  * @{
  */

/** @defgroup FLASHEx
  * @brief FLASH HAL Extension module driver
  * @{
  */

#ifdef HAL_FLASH_MODULE_ENABLED

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define SECTOR_MASK               ((uint32_t)0xFFFFFF07)

#define HAL_FLASH_TIMEOUT_VALUE   ((uint32_t)50000)/* 50 s */
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
extern FLASH_ProcessTypeDef pFlash;

/* Private function prototypes -----------------------------------------------*/
/* Option bytes control */
static void               FLASH_MassErase(uint8_t VoltageRange, uint32_t Banks);
static HAL_StatusTypeDef  FLASH_OB_EnableWRP(uint32_t WRPSector, uint32_t Banks);
static HAL_StatusTypeDef  FLASH_OB_DisableWRP(uint32_t WRPSector, uint32_t Banks);
static HAL_StatusTypeDef  FLASH_OB_RDP_LevelConfig(uint8_t Level);
static HAL_StatusTypeDef  FLASH_OB_UserConfig(uint8_t Iwdg, uint8_t Stop, uint8_t Stdby);
static HAL_StatusTypeDef  FLASH_OB_BOR_LevelConfig(uint8_t Level);
static uint8_t            FLASH_OB_GetUser(void);
static uint16_t           FLASH_OB_GetWRP(void);
static FlagStatus         FLASH_OB_GetRDP(void);
static uint8_t            FLASH_OB_GetBOR(void);

#if defined(STM32F401xC) || defined(STM32F401xE) || defined(STM32F411xE)
static HAL_StatusTypeDef  FLASH_OB_EnablePCROP(uint32_t Sector);
static HAL_StatusTypeDef  FLASH_OB_DisablePCROP(uint32_t Sector);
#endif /* STM32F401xC || STM32F401xE || STM32F411xE */

#if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx)|| defined(STM32F439xx) 
static HAL_StatusTypeDef FLASH_OB_EnablePCROP(uint32_t SectorBank1, uint32_t SectorBank2, uint32_t Banks);
static HAL_StatusTypeDef FLASH_OB_DisablePCROP(uint32_t SectorBank1, uint32_t SectorBank2, uint32_t Banks);
static HAL_StatusTypeDef  FLASH_OB_BootConfig(uint8_t BootConfig);
#endif /* STM32F427xx || STM32F437xx || STM32F429xx|| STM32F439xx */

/* Private functions ---------------------------------------------------------*/
extern HAL_StatusTypeDef         FLASH_WaitForLastOperation(uint32_t Timeout);

/** @defgroup FLASHEx_Private_Functions Extended FLASH Private functions
  * @{
  */

/** @defgroup FLASHEx_Group1 Extended IO operation functions
 *  @brief   Extended IO operation functions 
 *
@verbatim   
 ===============================================================================
                ##### Extended programming operation functions #####
 ===============================================================================  
    [..]
    This subsection provides a set of functions allowing to manage the Extension FLASH 
    programming operations Operations.

@endverbatim
  * @{
  */
/**
  * @brief  Perform a mass erase or erase the specified FLASH memory sectors 
  * @param[in]  pEraseInit: pointer to an FLASH_EraseInitTypeDef structure that
  *         contains the configuration information for the erasing.
  * 
  * @param[out]  SectorError: pointer to variable  that
  *         contains the configuration information on faulty sector in case of error 
  *         (0xFFFFFFFF means that all the sectors have been correctly erased)
  * 
  * @retval HAL Status
  */
HAL_StatusTypeDef HAL_FLASHEx_Erase(FLASH_EraseInitTypeDef *pEraseInit, uint32_t *SectorError)
{
  HAL_StatusTypeDef status = HAL_ERROR;
  uint32_t index = 0;
  
  /* Process Locked */
  __HAL_LOCK(&pFlash);

  /* Check the parameters */
  assert_param(IS_TYPEERASE(pEraseInit->TypeErase));

  /* Wait for last operation to be completed */
  status = FLASH_WaitForLastOperation((uint32_t)HAL_FLASH_TIMEOUT_VALUE);

  if (status == HAL_OK)
  {
    /*Initialization of SectorError variable*/
    *SectorError = 0xFFFFFFFF;
    
    if (pEraseInit->TypeErase == TYPEERASE_MASSERASE)
    {
      /*Mass erase to be done*/
      FLASH_MassErase((uint8_t) pEraseInit->VoltageRange, pEraseInit->Banks);

      /* Wait for last operation to be completed */
      status = FLASH_WaitForLastOperation((uint32_t)HAL_FLASH_TIMEOUT_VALUE);
      
      /* if the erase operation is completed, disable the MER Bit */
      FLASH->CR &= (~FLASH_MER_BIT);
    }
    else
    {
      /* Check the parameters */
      assert_param(IS_NBSECTORS(pEraseInit->NbSectors + pEraseInit->Sector));

      /* Erase by sector by sector to be done*/
      for(index = pEraseInit->Sector; index < (pEraseInit->NbSectors + pEraseInit->Sector); index++)
      {
        FLASH_Erase_Sector(index, (uint8_t) pEraseInit->VoltageRange);

        /* Wait for last operation to be completed */
        status = FLASH_WaitForLastOperation((uint32_t)HAL_FLASH_TIMEOUT_VALUE);
        
        /* If the erase operation is completed, disable the SER Bit */
        FLASH->CR &= (~FLASH_CR_SER);
        FLASH->CR &= SECTOR_MASK; 

        if (status != HAL_OK) 
        {
          /* In case of error, stop erase procedure and return the faulty sector*/
          *SectorError = index;
          break;
        }
      }
    }
  }

  /* Process Unlocked */
  __HAL_UNLOCK(&pFlash);

  return status;
}

/**
  * @brief  Perform a mass erase or erase the specified FLASH memory sectors  with interrupt enabled
  * @param  pEraseInit: pointer to an FLASH_EraseInitTypeDef structure that
  *         contains the configuration information for the erasing.
  * 
  * @retval HAL Status
  */
HAL_StatusTypeDef HAL_FLASHEx_Erase_IT(FLASH_EraseInitTypeDef *pEraseInit)
{
  HAL_StatusTypeDef status = HAL_OK;

  /* Process Locked */
  __HAL_LOCK(&pFlash);

  /* Check the parameters */
  assert_param(IS_TYPEERASE(pEraseInit->TypeErase));

  /* Enable End of FLASH Operation interrupt */
  __HAL_FLASH_ENABLE_IT(FLASH_IT_EOP);
  
  /* Enable Error source interrupt */
  __HAL_FLASH_ENABLE_IT(FLASH_IT_ERR);
  
  /* Clear pending flags (if any) */  
  __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_EOP    | FLASH_FLAG_OPERR | FLASH_FLAG_WRPERR |\
                         FLASH_FLAG_PGAERR | FLASH_FLAG_PGPERR| FLASH_FLAG_PGSERR);  
  
  if (pEraseInit->TypeErase == TYPEERASE_MASSERASE)
  {
    /*Mass erase to be done*/
    pFlash.ProcedureOnGoing = FLASH_PROC_MASSERASE;
    pFlash.Bank = pEraseInit->Banks;
    FLASH_MassErase((uint8_t) pEraseInit->VoltageRange, pEraseInit->Banks);
  }
  else
  {
    /* Erase by sector to be done*/

    /* Check the parameters */
    assert_param(IS_NBSECTORS(pEraseInit->NbSectors + pEraseInit->Sector));

    pFlash.ProcedureOnGoing = FLASH_PROC_SECTERASE;
    pFlash.NbSectorsToErase = pEraseInit->NbSectors;
    pFlash.Sector = pEraseInit->Sector;
    pFlash.VoltageForErase = (uint8_t)pEraseInit->VoltageRange;

    /*Erase 1st sector and wait for IT*/
    FLASH_Erase_Sector(pEraseInit->Sector, pEraseInit->VoltageRange);
  }

  return status;
}

/**
  * @brief   Program option bytes
  * @param  pOBInit: pointer to an FLASH_OBInitStruct structure that
  *         contains the configuration information for the programming.
  * 
  * @retval HAL Status
  */
HAL_StatusTypeDef HAL_FLASHEx_OBProgram(FLASH_OBProgramInitTypeDef *pOBInit)
{
  HAL_StatusTypeDef status = HAL_ERROR;
  
  /* Process Locked */
  __HAL_LOCK(&pFlash);

  /* Check the parameters */
  assert_param(IS_OPTIONBYTE(pOBInit->OptionType));

  /*Write protection configuration*/
  if((pOBInit->OptionType & OPTIONBYTE_WRP) == OPTIONBYTE_WRP)
  {
    assert_param(IS_WRPSTATE(pOBInit->WRPState));
    if (pOBInit->WRPState == WRPSTATE_ENABLE)
    {
      /*Enable of Write protection on the selected Sector*/
      status = FLASH_OB_EnableWRP(pOBInit->WRPSector, pOBInit->Banks);
    }
    else
    {
      /*Disable of Write protection on the selected Sector*/
      status = FLASH_OB_DisableWRP(pOBInit->WRPSector, pOBInit->Banks);
    }
  }

  /*Read protection configuration*/
  if((pOBInit->OptionType & OPTIONBYTE_RDP) == OPTIONBYTE_RDP)
  {
    status = FLASH_OB_RDP_LevelConfig(pOBInit->RDPLevel);
  }

  /*USER  configuration*/
  if((pOBInit->OptionType & OPTIONBYTE_USER) == OPTIONBYTE_USER)
  {
    status = FLASH_OB_UserConfig(pOBInit->USERConfig&OB_IWDG_SW, 
                                     pOBInit->USERConfig&OB_STOP_NO_RST,
                                     pOBInit->USERConfig&OB_STDBY_NO_RST);
  }

  /*BOR Level  configuration*/
  if((pOBInit->OptionType & OPTIONBYTE_BOR) == OPTIONBYTE_BOR)
  {
    status = FLASH_OB_BOR_LevelConfig(pOBInit->BORLevel);
  }

  /* Process Unlocked */
  __HAL_UNLOCK(&pFlash);

  return status;
}

/**
  * @brief   Get the Option byte configuration
  * @param  pOBInit: pointer to an FLASH_OBInitStruct structure that
  *         contains the configuration information for the programming.
  * 
  * @retval None
  */
void HAL_FLASHEx_OBGetConfig(FLASH_OBProgramInitTypeDef *pOBInit)
{
  pOBInit->OptionType = OPTIONBYTE_WRP | OPTIONBYTE_RDP | OPTIONBYTE_USER | OPTIONBYTE_BOR;

  /*Get WRP*/
  pOBInit->WRPSector = FLASH_OB_GetWRP();

  /*Get RDP Level*/
  pOBInit->RDPLevel = FLASH_OB_GetRDP();

  /*Get USER*/
  pOBInit->USERConfig = FLASH_OB_GetUser();

  /*Get BOR Level*/
  pOBInit->BORLevel = FLASH_OB_GetBOR();
}

#if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx)|| defined(STM32F439xx) ||\
    defined(STM32F401xC) || defined(STM32F401xE) || defined(STM32F411xE)
/**
  * @brief   Program option bytes
  * @param  pAdvOBInit: pointer to an FLASH_AdvOBProgramInitTypeDef structure that
  *         contains the configuration information for the programming.
  * 
  * @retval HAL Status
  */
HAL_StatusTypeDef HAL_FLASHEx_AdvOBProgram (FLASH_AdvOBProgramInitTypeDef *pAdvOBInit)
{
  HAL_StatusTypeDef status = HAL_ERROR;
  
  /* Check the parameters */
  assert_param(IS_OBEX(pAdvOBInit->OptionType));

  /*Program PCROP option byte*/
  if (((pAdvOBInit->OptionType) & OBEX_PCROP) == OBEX_PCROP)
  {
    /* Check the parameters */
    assert_param(IS_PCROPSTATE(pAdvOBInit->PCROPState));
    if ((pAdvOBInit->PCROPState) == PCROPSTATE_ENABLE)
    {
      /*Enable of Write protection on the selected Sector*/
#if defined(STM32F401xC) || defined(STM32F401xE) || defined(STM32F411xE) 
      status = FLASH_OB_EnablePCROP(pAdvOBInit->Sectors);
#else  /* STM32F427xx || STM32F437xx || STM32F429xx|| STM32F439xx */
      status = FLASH_OB_EnablePCROP(pAdvOBInit->SectorsBank1, pAdvOBInit->SectorsBank2, pAdvOBInit->Banks);
#endif /* STM32F401xC || STM32F401xE || STM32F411xE */
    }
    else
    {
      /*Disable of Write protection on the selected Sector*/
#if defined(STM32F401xC) || defined(STM32F401xE) || defined(STM32F411xE) 
      status = FLASH_OB_DisablePCROP(pAdvOBInit->Sectors);
#else /* STM32F427xx || STM32F437xx || STM32F429xx|| STM32F439xx */
      status = FLASH_OB_DisablePCROP(pAdvOBInit->SectorsBank1, pAdvOBInit->SectorsBank2, pAdvOBInit->Banks);
#endif /* STM32F401xC || STM32F401xE || STM32F411xE */
    }
  }
   
#if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx)|| defined(STM32F439xx)
  /*Program BOOT config option byte*/
  if (((pAdvOBInit->OptionType) & OBEX_BOOTCONFIG) == OBEX_BOOTCONFIG)
  {
    status = FLASH_OB_BootConfig(pAdvOBInit->BootConfig);
  }
#endif /* STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx */

  return status;
}

/**
  * @brief   Get the OBEX byte configuration
  * @param  pAdvOBInit: pointer to an FLASH_AdvOBProgramInitTypeDef structure that
  *         contains the configuration information for the programming.
  * 
  * @retval None
  */
void HAL_FLASHEx_AdvOBGetConfig(FLASH_AdvOBProgramInitTypeDef *pAdvOBInit)
{
#if defined(STM32F401xC) || defined(STM32F401xE) || defined(STM32F411xE)
  /*Get Sector*/
  pAdvOBInit->Sectors = (*(__IO uint16_t *)(OPTCR_BYTE2_ADDRESS));
#else  /* STM32F427xx || STM32F437xx || STM32F429xx|| STM32F439xx */
  /*Get Sector for Bank1*/
  pAdvOBInit->SectorsBank1 = (*(__IO uint16_t *)(OPTCR_BYTE2_ADDRESS));

  /*Get Sector for Bank2*/
  pAdvOBInit->SectorsBank2 = (*(__IO uint16_t *)(OPTCR1_BYTE2_ADDRESS));

  /*Get Boot config OB*/
  pAdvOBInit->BootConfig = *(__IO uint8_t *)OPTCR_BYTE0_ADDRESS;
#endif /* STM32F401xC || STM32F401xE || STM32F411xE */
}

/**
  * @brief  Select the Protection Mode 
  * 
  * @note   After PCROP activated Option Byte modification NOT POSSIBLE! excepted 
  *         Global Read Out Protection modification (from level1 to level0) 
  * @note   Once SPRMOD bit is active unprotection of a protected sector is not possible 
  * @note   Read a prtotected sector will set RDERR Flag and write a protected sector will set WRPERR Flag
  * @note   This function can be used only for STM32F427xx/STM32F429xx/STM32F437xx/STM32F439xx/STM32F401xx devices.     
  * 
  * @param  None
  * @retval HAL Status
  */
HAL_StatusTypeDef HAL_FLASHEx_OB_SelectPCROP(void)
{
  uint8_t optiontmp = 0xFF;

  /* Mask SPRMOD bit */
  optiontmp =  (uint8_t)((*(__IO uint8_t *)OPTCR_BYTE3_ADDRESS) & (uint8_t)0x7F); 
  
  /* Update Option Byte */
  *(__IO uint8_t *)OPTCR_BYTE3_ADDRESS = (uint8_t)(OB_PCROP_SELECTED | optiontmp); 
  
  return HAL_OK;
  
}

/**
  * @brief  Deselect the Protection Mode 
  * 
  * @note   After PCROP activated Option Byte modification NOT POSSIBLE! excepted 
  *         Global Read Out Protection modification (from level1 to level0) 
  * @note   Once SPRMOD bit is active unprotection of a protected sector is not possible 
  * @note   Read a prtotected sector will set RDERR Flag and write a protected sector will set WRPERR Flag
  * @note   This function can be used only for STM32F427xx/STM32F429xx/STM32F437xx/STM32F439xx/STM32F401xx devices.     
  * 
  * @param  None
  * @retval HAL Status
  */
HAL_StatusTypeDef HAL_FLASHEx_OB_DeSelectPCROP(void)
{
  uint8_t optiontmp = 0xFF;
  
  /* Mask SPRMOD bit */
  optiontmp =  (uint8_t)((*(__IO uint8_t *)OPTCR_BYTE3_ADDRESS) & (uint8_t)0x7F); 
  
  /* Update Option Byte */
  *(__IO uint8_t *)OPTCR_BYTE3_ADDRESS = (uint8_t)(OB_PCROP_DESELECTED | optiontmp);  
  
  return HAL_OK;
}

#endif /* STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx || STM32F401xC || STM32F401xE || STM32F411xE */

#if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx)|| defined(STM32F439xx)

/**
  * @brief  Returns the FLASH Write Protection Option Bytes value for Bank 2
  * @note   This function can be used only for STM32F427X and STM32F429X devices.  
  * @param  None
  * @retval The FLASH Write Protection  Option Bytes value
  */
uint16_t HAL_FLASHEx_OB_GetBank2WRP(void)
{                            
  /* Return the FLASH write protection Register value */
  return (*(__IO uint16_t *)(OPTCR1_BYTE2_ADDRESS));
}
#endif /* STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx */

/**
  * @}
  */
  
#if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx)|| defined(STM32F439xx)
/**
  * @brief  Full erase of FLASH memory sectors 
  * @param  VoltageRange: The device voltage range which defines the erase parallelism.  
  *          This parameter can be one of the following values:
  *            @arg VOLTAGE_RANGE_1: when the device voltage range is 1.8V to 2.1V, 
  *                                  the operation will be done by byte (8-bit) 
  *            @arg VOLTAGE_RANGE_2: when the device voltage range is 2.1V to 2.7V,
  *                                  the operation will be done by half word (16-bit)
  *            @arg VOLTAGE_RANGE_3: when the device voltage range is 2.7V to 3.6V,
  *                                  the operation will be done by word (32-bit)
  *            @arg VOLTAGE_RANGE_4: when the device voltage range is 2.7V to 3.6V + External Vpp, 
  *                                  the operation will be done by double word (64-bit)
  * 
  * @param  Banks: Banks to be erased
  *          This parameter can be one of the following values:
  *            @arg FLASH_BANK_1: Bank1 to be erased
  *            @arg FLASH_BANK_2: Bank2 to be erased
  *            @arg FLASH_BANK_BOTH: Bank1 and Bank2 to be erased
  *
  * @retval HAL Status
  */
static void FLASH_MassErase(uint8_t VoltageRange, uint32_t Banks)
{
  uint32_t tmp_psize = 0;
  
  /* Check the parameters */
  assert_param(IS_VOLTAGERANGE(VoltageRange));
  assert_param(IS_FLASH_BANK(Banks));

  /* if the previous operation is completed, proceed to erase all sectors */
  FLASH->CR &= CR_PSIZE_MASK;
  FLASH->CR |= tmp_psize;
  if(Banks == FLASH_BANK_BOTH)
  {
    /* bank1 & bank2 will be erased*/
    FLASH->CR |= FLASH_MER_BIT;
  }
  else if(Banks == FLASH_BANK_1)
  {
    /*Only bank1 will be erased*/
    FLASH->CR |= FLASH_CR_MER1;
  }
  else
  {
    /*Only bank2 will be erased*/
    FLASH->CR |= FLASH_CR_MER2;
  }
  FLASH->CR |= FLASH_CR_STRT;
}

/**
  * @brief  Erase the specified FLASH memory sector
  * @param  Sector: FLASH sector to erase
  *         The value of this parameter depend on device used within the same series      
  * @param  VoltageRange: The device voltage range which defines the erase parallelism.  
  *          This parameter can be one of the following values:
  *            @arg VOLTAGE_RANGE_1: when the device voltage range is 1.8V to 2.1V, 
  *                                  the operation will be done by byte (8-bit) 
  *            @arg VOLTAGE_RANGE_2: when the device voltage range is 2.1V to 2.7V,
  *                                  the operation will be done by half word (16-bit)
  *            @arg VOLTAGE_RANGE_3: when the device voltage range is 2.7V to 3.6V,
  *                                  the operation will be done by word (32-bit)
  *            @arg VOLTAGE_RANGE_4: when the device voltage range is 2.7V to 3.6V + External Vpp, 
  *                                  the operation will be done by double word (64-bit)
  * 
  * @retval None
  */
void FLASH_Erase_Sector(uint32_t Sector, uint8_t VoltageRange)
{
  uint32_t tmp_psize = 0;

  /* Check the parameters */
  assert_param(IS_FLASH_SECTOR(Sector));
  assert_param(IS_VOLTAGERANGE(VoltageRange));
  
  if(VoltageRange == VOLTAGE_RANGE_1)
  {
     tmp_psize = FLASH_PSIZE_BYTE;
  }
  else if(VoltageRange == VOLTAGE_RANGE_2)
  {
    tmp_psize = FLASH_PSIZE_HALF_WORD;
  }
  else if(VoltageRange == VOLTAGE_RANGE_3)
  {
    tmp_psize = FLASH_PSIZE_WORD;
  }
  else
  {
    tmp_psize = FLASH_PSIZE_DOUBLE_WORD;
  }

  /* Need to add offset of 4 when sector higher than FLASH_SECTOR_11 */
  if (Sector > FLASH_SECTOR_11) 
  {
    Sector += 4;
  }
  /* If the previous operation is completed, proceed to erase the sector */
  FLASH->CR &= CR_PSIZE_MASK;
  FLASH->CR |= tmp_psize;
  FLASH->CR &= SECTOR_MASK;
  FLASH->CR |= FLASH_CR_SER | (Sector << POSITION_VAL(FLASH_CR_SNB));
  FLASH->CR |= FLASH_CR_STRT;
}

/**
  * @brief  Enable the write protection of the desired bank1 or bank 2 sectors
  *
  * @note   When the memory read protection level is selected (RDP level = 1), 
  *         it is not possible to program or erase the flash sector i if CortexM4  
  *         debug features are connected or boot code is executed in RAM, even if nWRPi = 1 
  * @note   Active value of nWRPi bits is inverted when PCROP mode is active (SPRMOD =1).   
  * 
  * @param  WRPSector: specifies the sector(s) to be write protected.
  *          This parameter can be one of the following values:
  *            @arg WRPSector: A value between OB_WRP_SECTOR_0 and OB_WRP_SECTOR_23                      
  *            @arg OB_WRP_SECTOR_All
  * @note   BANK2 starts from OB_WRP_SECTOR_12
  *
  * @param  Banks: Enable write protection on all the sectors for the specific bank
  *          This parameter can be one of the following values:
  *            @arg FLASH_BANK_1: WRP on all sectors of bank1
  *            @arg FLASH_BANK_2: WRP on all sectors of bank2
  *            @arg FLASH_BANK_BOTH: WRP on all sectors of bank1 & bank2
  *
  * @retval HAL FLASH State   
  */
static HAL_StatusTypeDef FLASH_OB_EnableWRP(uint32_t WRPSector, uint32_t Banks)
{
  HAL_StatusTypeDef status = HAL_OK;
  
  /* Check the parameters */
  assert_param(IS_OB_WRP_SECTOR(WRPSector));
  assert_param(IS_FLASH_BANK(Banks));
    
  /* Wait for last operation to be completed */
  status = FLASH_WaitForLastOperation((uint32_t)HAL_FLASH_TIMEOUT_VALUE);

  if(status == HAL_OK)
  {
    if (((WRPSector == OB_WRP_SECTOR_All) && ((Banks == FLASH_BANK_1) || (Banks == FLASH_BANK_BOTH))) ||
         (WRPSector < OB_WRP_SECTOR_12))
    {
       if (WRPSector == OB_WRP_SECTOR_All)
       {
          /*Write protection on all sector of BANK1*/
          *(__IO uint16_t*)OPTCR_BYTE2_ADDRESS &= (~(WRPSector>>12));  
       }
       else
       {
          /*Write protection done on sectors of BANK1*/
          *(__IO uint16_t*)OPTCR_BYTE2_ADDRESS &= (~WRPSector);  
       }
    }
    else 
    {
      /*Write protection done on sectors of BANK2*/
      *(__IO uint16_t*)OPTCR1_BYTE2_ADDRESS &= (~(WRPSector>>12));  
    }

    /*Write protection on all sector of BANK2*/
    if ((WRPSector == OB_WRP_SECTOR_All) && (Banks == FLASH_BANK_BOTH))
    {
      /* Wait for last operation to be completed */
      status = FLASH_WaitForLastOperation((uint32_t)HAL_FLASH_TIMEOUT_VALUE);
      
      if(status == HAL_OK)
      { 
        *(__IO uint16_t*)OPTCR1_BYTE2_ADDRESS &= (~(WRPSector>>12));  
      }
    }
    
  }
  
  return status;
}

/**
  * @brief  Disable the write protection of the desired bank1 or bank 2 sectors
  *
  * @note   When the memory read protection level is selected (RDP level = 1), 
  *         it is not possible to program or erase the flash sector i if CortexM4  
  *         debug features are connected or boot code is executed in RAM, even if nWRPi = 1 
  * @note   Active value of nWRPi bits is inverted when PCROP mode is active (SPRMOD =1).   
  * 
  * @param  WRPSector: specifies the sector(s) to be write protected.
  *          This parameter can be one of the following values:
  *            @arg WRPSector: A value between OB_WRP_SECTOR_0 and OB_WRP_SECTOR_23                      
  *            @arg OB_WRP_Sector_All
  * @note   BANK2 starts from OB_WRP_SECTOR_12
  *
  * @param  Banks: Disable write protection on all the sectors for the specific bank
  *          This parameter can be one of the following values:
  *            @arg FLASH_BANK_1: Bank1 to be erased
  *            @arg FLASH_BANK_2: Bank2 to be erased
  *            @arg FLASH_BANK_BOTH: Bank1 and Bank2 to be erased
  *
  * @retval HAL Staus   
  */
static HAL_StatusTypeDef FLASH_OB_DisableWRP(uint32_t WRPSector, uint32_t Banks)
{
  HAL_StatusTypeDef status = HAL_OK;
  
  /* Check the parameters */
  assert_param(IS_OB_WRP_SECTOR(WRPSector));
  assert_param(IS_FLASH_BANK(Banks));
    
  /* Wait for last operation to be completed */
  status = FLASH_WaitForLastOperation((uint32_t)HAL_FLASH_TIMEOUT_VALUE);

  if(status == HAL_OK)
  {
    if (((WRPSector == OB_WRP_SECTOR_All) && ((Banks == FLASH_BANK_1) || (Banks == FLASH_BANK_BOTH))) ||
         (WRPSector < OB_WRP_SECTOR_12))
    {
       if (WRPSector == OB_WRP_SECTOR_All)
       {
          /*Write protection on all sector of BANK1*/
          *(__IO uint16_t*)OPTCR_BYTE2_ADDRESS |= (uint16_t)(WRPSector>>12); 
       }
       else
       {
          /*Write protection done on sectors of BANK1*/
          *(__IO uint16_t*)OPTCR_BYTE2_ADDRESS |= (uint16_t)WRPSector; 
       }
    }
    else 
    {
      /*Write protection done on sectors of BANK2*/
      *(__IO uint16_t*)OPTCR1_BYTE2_ADDRESS |= (uint16_t)(WRPSector>>12); 
    }

    /*Write protection on all sector  of BANK2*/
    if ((WRPSector == OB_WRP_SECTOR_All) && (Banks == FLASH_BANK_BOTH))
    {
      /* Wait for last operation to be completed */
      status = FLASH_WaitForLastOperation((uint32_t)HAL_FLASH_TIMEOUT_VALUE);
      
      if(status == HAL_OK)
      { 
        *(__IO uint16_t*)OPTCR1_BYTE2_ADDRESS |= (uint16_t)(WRPSector>>12); 
      }
    }
    
  }

  return status;
}

/**
  * @brief  Configure the Dual Bank Boot.
  *   
  * @note   This function can be used only for STM32F42xxx/43xxx devices.
  *      
  * @param  BootConfig specifies the Dual Bank Boot Option byte.
  *          This parameter can be one of the following values:
  *            @arg OB_Dual_BootEnabled: Dual Bank Boot Enable
  *            @arg OB_Dual_BootDisabled: Dual Bank Boot Disabled
  * @retval None
  */
static HAL_StatusTypeDef FLASH_OB_BootConfig(uint8_t BootConfig)
{
  HAL_StatusTypeDef status = HAL_OK;

  /* Check the parameters */
  assert_param(IS_OB_BOOT(BootConfig));

  /* Wait for last operation to be completed */  
  status = FLASH_WaitForLastOperation((uint32_t)HAL_FLASH_TIMEOUT_VALUE);

  if(status == HAL_OK)
  { 
    /* Set Dual Bank Boot */
    *(__IO uint8_t *)OPTCR_BYTE0_ADDRESS &= (~FLASH_OPTCR_BFB2);
    *(__IO uint8_t *)OPTCR_BYTE0_ADDRESS |= BootConfig;
  }
  
  return status;
}

/**
  * @brief  Enable the read/write protection (PCROP) of the desired 
  *         sectors of Bank 1 and/or Bank 2.
  * @note   This function can be used only for STM32F42xxx/43xxx devices.
  * @param  SectorBank1 Specifies the sector(s) to be read/write protected or unprotected for bank1.
  *          This parameter can be one of the following values:
  *            @arg OB_PCROP: A value between OB_PCROP_SECTOR_0 and OB_PCROP_SECTOR_11
  *            @arg OB_PCROP_SECTOR__All                         
  * @param  SectorBank2 Specifies the sector(s) to be read/write protected or unprotected for bank2.
  *          This parameter can be one of the following values:
  *            @arg OB_PCROP: A value between OB_PCROP_SECTOR_12 and OB_PCROP_SECTOR_23
  *            @arg OB_PCROP_SECTOR__All                         
  * @param  Banks Enable PCROP protection on all the sectors for the specific bank
  *          This parameter can be one of the following values:
  *            @arg FLASH_BANK_1: WRP on all sectors of bank1
  *            @arg FLASH_BANK_2: WRP on all sectors of bank2
  *            @arg FLASH_BANK_BOTH: WRP on all sectors of bank1 & bank2
  *
  * @retval HAL Status  
  */
static HAL_StatusTypeDef FLASH_OB_EnablePCROP(uint32_t SectorBank1, uint32_t SectorBank2, uint32_t Banks)
{
  HAL_StatusTypeDef status = HAL_OK;
  
  assert_param(IS_FLASH_BANK(Banks));
    
  /* Wait for last operation to be completed */
  status = FLASH_WaitForLastOperation((uint32_t)HAL_FLASH_TIMEOUT_VALUE);

  if(status == HAL_OK)
  {
    if ((Banks == FLASH_BANK_1) || (Banks == FLASH_BANK_BOTH))
    {
      assert_param(IS_OB_PCROP(SectorBank1));
      /*Write protection done on sectors of BANK1*/
      *(__IO uint16_t*)OPTCR_BYTE2_ADDRESS |= (uint16_t)SectorBank1; 
    }
    else 
    {
      assert_param(IS_OB_PCROP(SectorBank2));
      /*Write protection done on sectors of BANK2*/
      *(__IO uint16_t*)OPTCR1_BYTE2_ADDRESS |= (uint16_t)SectorBank2; 
    }

    /*Write protection on all sector  of BANK2*/
    if (Banks == FLASH_BANK_BOTH)
    {
      assert_param(IS_OB_PCROP(SectorBank2));
      /* Wait for last operation to be completed */
      status = FLASH_WaitForLastOperation((uint32_t)HAL_FLASH_TIMEOUT_VALUE);
      
      if(status == HAL_OK)
      { 
        /*Write protection done on sectors of BANK2*/
        *(__IO uint16_t*)OPTCR1_BYTE2_ADDRESS |= (uint16_t)SectorBank2; 
      }
    }
    
  }

  return status;
}


/**
  * @brief  Disable the read/write protection (PCROP) of the desired 
  *         sectors  of Bank 1 and/or Bank 2.
  * @note   This function can be used only for STM32F42xxx/43xxx devices.
  * @param  SectorBank1 specifies the sector(s) to be read/write protected or unprotected for bank1.
  *          This parameter can be one of the following values:
  *            @arg OB_PCROP: A value between OB_PCROP_SECTOR_0 and OB_PCROP_SECTOR_11
  *            @arg OB_PCROP_SECTOR__All                         
  * @param  SectorBank2 Specifies the sector(s) to be read/write protected or unprotected for bank2.
  *          This parameter can be one of the following values:
  *            @arg OB_PCROP: A value between OB_PCROP_SECTOR_12 and OB_PCROP_SECTOR_23
  *            @arg OB_PCROP_SECTOR__All                         
  * @param  Banks Disable PCROP protection on all the sectors for the specific bank
  *          This parameter can be one of the following values:
  *            @arg FLASH_BANK_1: WRP on all sectors of bank1
  *            @arg FLASH_BANK_2: WRP on all sectors of bank2
  *            @arg FLASH_BANK_BOTH: WRP on all sectors of bank1 & bank2
  *
  * @retval HAL Status  
  */
static HAL_StatusTypeDef FLASH_OB_DisablePCROP(uint32_t SectorBank1, uint32_t SectorBank2, uint32_t Banks)
{  
  HAL_StatusTypeDef status = HAL_OK;
  
  /* Check the parameters */
  assert_param(IS_FLASH_BANK(Banks));
    
  /* Wait for last operation to be completed */
  status = FLASH_WaitForLastOperation((uint32_t)HAL_FLASH_TIMEOUT_VALUE);

  if(status == HAL_OK)
  {
    if ((Banks == FLASH_BANK_1) || (Banks == FLASH_BANK_BOTH))
    {
      assert_param(IS_OB_PCROP(SectorBank1));
      /*Write protection done on sectors of BANK1*/
      *(__IO uint16_t*)OPTCR_BYTE2_ADDRESS &= (~SectorBank1); 
    }
    else 
    {
      /*Write protection done on sectors of BANK2*/
      assert_param(IS_OB_PCROP(SectorBank2));
      *(__IO uint16_t*)OPTCR1_BYTE2_ADDRESS &= (~SectorBank2); 
    }

    /*Write protection on all sector  of BANK2*/
    if (Banks == FLASH_BANK_BOTH)
    {
      assert_param(IS_OB_PCROP(SectorBank2));
     /* Wait for last operation to be completed */
      status = FLASH_WaitForLastOperation((uint32_t)HAL_FLASH_TIMEOUT_VALUE);
      
      if(status == HAL_OK)
      { 
        /*Write protection done on sectors of BANK2*/
        *(__IO uint16_t*)OPTCR1_BYTE2_ADDRESS &= (~SectorBank2); 
      }
    }
    
  }
  
  return status;

}

#endif /* STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx */

#if defined(STM32F405xx) || defined(STM32F415xx) || defined(STM32F407xx)|| defined(STM32F417xx) ||\
    defined(STM32F401xC) || defined(STM32F401xE) || defined(STM32F411xE)
/**
  * @brief  Mass erase of FLASH memory
  * @param  VoltageRange: The device voltage range which defines the erase parallelism.  
  *          This parameter can be one of the following values:
  *            @arg VOLTAGE_RANGE_1: when the device voltage range is 1.8V to 2.1V, 
  *                                  the operation will be done by byte (8-bit) 
  *            @arg VOLTAGE_RANGE_2: when the device voltage range is 2.1V to 2.7V,
  *                                  the operation will be done by half word (16-bit)
  *            @arg VOLTAGE_RANGE_3: when the device voltage range is 2.7V to 3.6V,
  *                                  the operation will be done by word (32-bit)
  *            @arg VOLTAGE_RANGE_4: when the device voltage range is 2.7V to 3.6V + External Vpp, 
  *                                  the operation will be done by double word (64-bit)
  * 
  * @param  Banks: Banks to be erased
  *          This parameter can be one of the following values:
  *            @arg FLASH_BANK_1: Bank1 to be erased
  *
  * @retval None
  */
static void FLASH_MassErase(uint8_t VoltageRange, uint32_t Banks)
{
  uint32_t tmp_psize = 0;
  
  /* Check the parameters */
  assert_param(IS_VOLTAGERANGE(VoltageRange));
  assert_param(IS_FLASH_BANK(Banks));

  /* If the previous operation is completed, proceed to erase all sectors */
   FLASH->CR &= CR_PSIZE_MASK;
   FLASH->CR |= tmp_psize;
   FLASH->CR |= FLASH_CR_MER;
   FLASH->CR |= FLASH_CR_STRT;
}

/**
  * @brief  Erase the specified FLASH memory sector
  * @param  Sector: FLASH sector to erase
  *         The value of this parameter depend on device used within the same series      
  * @param  VoltageRange: The device voltage range which defines the erase parallelism.  
  *          This parameter can be one of the following values:
  *            @arg VOLTAGE_RANGE_1: when the device voltage range is 1.8V to 2.1V, 
  *                                  the operation will be done by byte (8-bit) 
  *            @arg VOLTAGE_RANGE_2: when the device voltage range is 2.1V to 2.7V,
  *                                  the operation will be done by half word (16-bit)
  *            @arg VOLTAGE_RANGE_3: when the device voltage range is 2.7V to 3.6V,
  *                                  the operation will be done by word (32-bit)
  *            @arg VOLTAGE_RANGE_4: when the device voltage range is 2.7V to 3.6V + External Vpp, 
  *                                  the operation will be done by double word (64-bit)
  * 
  * @retval None
  */
void FLASH_Erase_Sector(uint32_t Sector, uint8_t VoltageRange)
{
  uint32_t tmp_psize = 0;

  /* Check the parameters */
  assert_param(IS_FLASH_SECTOR(Sector));
  assert_param(IS_VOLTAGERANGE(VoltageRange));
  
  if(VoltageRange == VOLTAGE_RANGE_1)
  {
     tmp_psize = FLASH_PSIZE_BYTE;
  }
  else if(VoltageRange == VOLTAGE_RANGE_2)
  {
    tmp_psize = FLASH_PSIZE_HALF_WORD;
  }
  else if(VoltageRange == VOLTAGE_RANGE_3)
  {
    tmp_psize = FLASH_PSIZE_WORD;
  }
  else
  {
    tmp_psize = FLASH_PSIZE_DOUBLE_WORD;
  }

  /* If the previous operation is completed, proceed to erase the sector */
  FLASH->CR &= CR_PSIZE_MASK;
  FLASH->CR |= tmp_psize;
  FLASH->CR &= SECTOR_MASK;
  FLASH->CR |= FLASH_CR_SER | (Sector << POSITION_VAL(FLASH_CR_SNB));
  FLASH->CR |= FLASH_CR_STRT;
}

/**
  * @brief  Enable the write protection of the desired bank 1 sectors
  *
  * @note   When the memory read protection level is selected (RDP level = 1), 
  *         it is not possible to program or erase the flash sector i if CortexM4  
  *         debug features are connected or boot code is executed in RAM, even if nWRPi = 1 
  * @note   Active value of nWRPi bits is inverted when PCROP mode is active (SPRMOD =1).   
  * 
  * @param  WRPSector: specifies the sector(s) to be write protected.
  *         The value of this parameter depend on device used within the same series 
  * 
  * @param  Banks: Enable write protection on all the sectors for the specific bank
  *          This parameter can be one of the following values:
  *            @arg FLASH_BANK_1: WRP on all sectors of bank1
  *
  * @retval HAL Status 
  */
static HAL_StatusTypeDef FLASH_OB_EnableWRP(uint32_t WRPSector, uint32_t Banks)
{
  HAL_StatusTypeDef status = HAL_OK;
  
  /* Check the parameters */
  assert_param(IS_OB_WRP_SECTOR(WRPSector));
  assert_param(IS_FLASH_BANK(Banks));
    
  /* Wait for last operation to be completed */
  status = FLASH_WaitForLastOperation((uint32_t)HAL_FLASH_TIMEOUT_VALUE);

  if(status == HAL_OK)
  { 
    *(__IO uint16_t*)OPTCR_BYTE2_ADDRESS &= (~WRPSector);  
  }
  
  return status;
}

/**
  * @brief  Disable the write protection of the desired bank 1 sectors
  *
  * @note   When the memory read protection level is selected (RDP level = 1), 
  *         it is not possible to program or erase the flash sector i if CortexM4  
  *         debug features are connected or boot code is executed in RAM, even if nWRPi = 1 
  * @note   Active value of nWRPi bits is inverted when PCROP mode is active (SPRMOD =1).   
  * 
  * @param  WRPSector: specifies the sector(s) to be write protected.
  *         The value of this parameter depend on device used within the same series 
  * 
  * @param  Banks: Enable write protection on all the sectors for the specific bank
  *          This parameter can be one of the following values:
  *            @arg FLASH_BANK_1: WRP on all sectors of bank1
  *
  * @retval HAL Status 
  */
static HAL_StatusTypeDef FLASH_OB_DisableWRP(uint32_t WRPSector, uint32_t Banks)
{
  HAL_StatusTypeDef status = HAL_OK;
  
  /* Check the parameters */
  assert_param(IS_OB_WRP_SECTOR(WRPSector));
  assert_param(IS_FLASH_BANK(Banks));
    
  /* Wait for last operation to be completed */
  status = FLASH_WaitForLastOperation((uint32_t)HAL_FLASH_TIMEOUT_VALUE);

  if(status == HAL_OK)
  { 
    *(__IO uint16_t*)OPTCR_BYTE2_ADDRESS |= (uint16_t)WRPSector; 
  }
  
  return status;
}
#endif /* STM32F405xx || STM32F415xx || STM32F407xx || STM32F417xx || STM32F401xC || STM32F401xE || STM32F411xE */

#if defined(STM32F401xC) || defined(STM32F401xE) || defined(STM32F411xE)
/**
  * @brief  Enable the read/write protection (PCROP) of the desired sectors.
  * @note   This function can be used only for STM32F401xx devices.
  * @param  Sector specifies the sector(s) to be read/write protected or unprotected.
  *          This parameter can be one of the following values:
  *            @arg OB_PCROP: A value between OB_PCROP_Sector0 and OB_PCROP_Sector5
  *            @arg OB_PCROP_Sector_All                         
  * @retval HAL Status  
  */
static HAL_StatusTypeDef FLASH_OB_EnablePCROP(uint32_t Sector)
{
  HAL_StatusTypeDef status = HAL_OK;
  
  /* Check the parameters */
  assert_param(IS_OB_PCROP(Sector));
    
  /* Wait for last operation to be completed */  
  status = FLASH_WaitForLastOperation((uint32_t)HAL_FLASH_TIMEOUT_VALUE);

  if(status == HAL_OK)
  { 
    *(__IO uint16_t*)OPTCR_BYTE2_ADDRESS |= (uint16_t)Sector;
  }
  
  return status;
}


/**
  * @brief  Disable the read/write protection (PCROP) of the desired sectors.
  * @note   This function can be used only for STM32F401xx devices.
  * @param  Sector specifies the sector(s) to be read/write protected or unprotected.
  *          This parameter can be one of the following values:
  *            @arg OB_PCROP: A value between OB_PCROP_Sector0 and OB_PCROP_Sector5
  *            @arg OB_PCROP_Sector_All                         
  * @retval HAL Status  
  */
static HAL_StatusTypeDef FLASH_OB_DisablePCROP(uint32_t Sector)
{  
  HAL_StatusTypeDef status = HAL_OK;
  
  /* Check the parameters */
  assert_param(IS_OB_PCROP(Sector));
    
  /* Wait for last operation to be completed */  
  status = FLASH_WaitForLastOperation((uint32_t)HAL_FLASH_TIMEOUT_VALUE);

  if(status == HAL_OK)
  { 
    *(__IO uint16_t*)OPTCR_BYTE2_ADDRESS &= (~Sector);
  }
  
  return status;

}
#endif /* STM32F401xC || STM32F401xE || STM32F411xE */

/**
  * @brief  Set the read protection level.
  * @param  Level: specifies the read protection level.
  *          This parameter can be one of the following values:
  *            @arg OB_RDP_LEVEL_0: No protection
  *            @arg OB_RDP_LEVEL_1: Read protection of the memory
  *            @arg OB_RDP_LEVEL_2: Full chip protection
  *   
  * @note WARNING: When enabling OB_RDP level 2 it's no more possible to go back to level 1 or 0
  *    
  * @retval HAL Status
  */
static HAL_StatusTypeDef FLASH_OB_RDP_LevelConfig(uint8_t Level)
{
  HAL_StatusTypeDef status = HAL_OK;
  
  /* Check the parameters */
  assert_param(IS_OB_RDP_LEVEL(Level));
    
  /* Wait for last operation to be completed */
  status = FLASH_WaitForLastOperation((uint32_t)HAL_FLASH_TIMEOUT_VALUE);

  if(status == HAL_OK)
  { 
    *(__IO uint8_t*)OPTCR_BYTE1_ADDRESS = Level;
  }
  
  return status;
}

/**
  * @brief  Program the FLASH User Option Byte: IWDG_SW / RST_STOP / RST_STDBY.    
  * @param  Iwdg: Selects the IWDG mode
  *          This parameter can be one of the following values:
  *            @arg OB_IWDG_SW: Software IWDG selected
  *            @arg OB_IWDG_HW: Hardware IWDG selected
  * @param  Stop: Reset event when entering STOP mode.
  *          This parameter  can be one of the following values:
  *            @arg OB_STOP_NO_RST: No reset generated when entering in STOP
  *            @arg OB_STOP_RST: Reset generated when entering in STOP
  * @param  Stdby: Reset event when entering Standby mode.
  *          This parameter  can be one of the following values:
  *            @arg OB_STDBY_NO_RST: No reset generated when entering in STANDBY
  *            @arg OB_STDBY_RST: Reset generated when entering in STANDBY
  * @retval HAL Status
  */
static HAL_StatusTypeDef FLASH_OB_UserConfig(uint8_t Iwdg, uint8_t Stop, uint8_t Stdby)
{
  uint8_t optiontmp = 0xFF;
  HAL_StatusTypeDef status = HAL_OK;

  /* Check the parameters */
  assert_param(IS_OB_IWDG_SOURCE(Iwdg));
  assert_param(IS_OB_STOP_SOURCE(Stop));
  assert_param(IS_OB_STDBY_SOURCE(Stdby));

  /* Wait for last operation to be completed */
  status = FLASH_WaitForLastOperation((uint32_t)HAL_FLASH_TIMEOUT_VALUE);
  
  if(status == HAL_OK)
  {     
    /* Mask OPTLOCK, OPTSTRT, BOR_LEV and BFB2 bits */
    optiontmp =  (uint8_t)((*(__IO uint8_t *)OPTCR_BYTE0_ADDRESS) & (uint8_t)0x1F);

    /* Update User Option Byte */
    *(__IO uint8_t *)OPTCR_BYTE0_ADDRESS = Iwdg | (uint8_t)(Stdby | (uint8_t)(Stop | ((uint8_t)optiontmp))); 
  }
  
  return status; 

}

/**
  * @brief  Set the BOR Level. 
  * @param  Level: specifies the Option Bytes BOR Reset Level.
  *          This parameter can be one of the following values:
  *            @arg OB_BOR_LEVEL3: Supply voltage ranges from 2.7 to 3.6 V
  *            @arg OB_BOR_LEVEL2: Supply voltage ranges from 2.4 to 2.7 V
  *            @arg OB_BOR_LEVEL1: Supply voltage ranges from 2.1 to 2.4 V
  *            @arg OB_BOR_OFF: Supply voltage ranges from 1.62 to 2.1 V
  * @retval HAL Status
  */
static HAL_StatusTypeDef FLASH_OB_BOR_LevelConfig(uint8_t Level)
{
  /* Check the parameters */
  assert_param(IS_OB_BOR_LEVEL(Level));

  /* Set the BOR Level */
  *(__IO uint8_t *)OPTCR_BYTE0_ADDRESS &= (~FLASH_OPTCR_BOR_LEV);
  *(__IO uint8_t *)OPTCR_BYTE0_ADDRESS |= Level;
  
  return HAL_OK;
  
}

/**
  * @brief  Return the FLASH User Option Byte value.
  * @param  None
  * @retval uint8_t FLASH User Option Bytes values: IWDG_SW(Bit0), RST_STOP(Bit1)
  *         and RST_STDBY(Bit2).
  */
static uint8_t FLASH_OB_GetUser(void)
{
  /* Return the User Option Byte */
  return ((uint8_t)(FLASH->OPTCR & 0xE0));
}

/**
  * @brief  Return the FLASH Write Protection Option Bytes value.
  * @param  None
  * @retval uint16_t FLASH Write Protection Option Bytes value
  */
static uint16_t FLASH_OB_GetWRP(void)
{
  /* Return the FLASH write protection Register value */
  return (*(__IO uint16_t *)(OPTCR_BYTE2_ADDRESS));
}

/**
  * @brief  Returns the FLASH Read Protection level.
  * @param  None
  * @retval FlagStatus FLASH ReadOut Protection Status:
  *           - SET, when OB_RDP_Level_1 or OB_RDP_Level_2 is set
  *           - RESET, when OB_RDP_Level_0 is set
  */
static FlagStatus FLASH_OB_GetRDP(void)
{
  FlagStatus readstatus = RESET;

  if ((*(__IO uint8_t*)(OPTCR_BYTE1_ADDRESS) != (uint8_t)OB_RDP_LEVEL_0))
  {
    readstatus = SET;
  }
  
  return readstatus;
}

/**
  * @brief  Returns the FLASH BOR level.
  * @param  None
  * @retval uint8_t The FLASH BOR level:
  *           - OB_BOR_LEVEL3: Supply voltage ranges from 2.7 to 3.6 V
  *           - OB_BOR_LEVEL2: Supply voltage ranges from 2.4 to 2.7 V
  *           - OB_BOR_LEVEL1: Supply voltage ranges from 2.1 to 2.4 V
  *           - OB_BOR_OFF   : Supply voltage ranges from 1.62 to 2.1 V  
  */
static uint8_t FLASH_OB_GetBOR(void)
{
  /* Return the FLASH BOR level */
  return (uint8_t)(*(__IO uint8_t *)(OPTCR_BYTE0_ADDRESS) & (uint8_t)0x0C);
}

/**
  * @}
  */
  
#endif /* HAL_FLASH_MODULE_ENABLED */

/**
  * @}
  */

/**
  * @}
  */

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