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/**
******************************************************************************
* @file IAP/IAP_Main/Src/flash_if.c
* @author MCD Application Team
* @brief This file provides all the memory related operation functions.
******************************************************************************
* @attention
*
* Copyright (c) 2017 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/** @addtogroup STM32F4xx_IAP_Main
* @{
*/
/* Includes ------------------------------------------------------------------*/
#include "flash_if.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
static uint32_t GetSector(uint32_t Address);
/* Private functions ---------------------------------------------------------*/
/**
* @brief Unlocks Flash for write access
* @param None
* @retval None
*/
void FLASH_If_Init(void)
{
HAL_FLASH_Unlock();
/* 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);
}
/**
* @brief This function does an erase of all user flash area
* @param StartSector: start of user flash area
* @retval 0: user flash area successfully erased
* 1: error occurred
*/
uint32_t FLASH_If_Erase(uint32_t StartSector)
{
uint32_t UserStartSector;
uint32_t SectorError;
FLASH_EraseInitTypeDef pEraseInit;
/* Unlock the Flash to enable the flash control register access *************/
FLASH_If_Init();
/* Get the sector where start the user flash area */
UserStartSector = GetSector(APPLICATION_ADDRESS);
pEraseInit.TypeErase = TYPEERASE_SECTORS;
pEraseInit.Sector = UserStartSector;
pEraseInit.NbSectors = 10;
pEraseInit.VoltageRange = VOLTAGE_RANGE_3;
if (HAL_FLASHEx_Erase(&pEraseInit, &SectorError) != HAL_OK)
{
/* Error occurred while page erase */
return (1);
}
return (0);
}
/**
* @brief This function writes a data buffer in flash (data are 32-bit aligned).
* @note After writing data buffer, the flash content is checked.
* @param FlashAddress: start address for writing data buffer
* @param Data: pointer on data buffer
* @param DataLength: length of data buffer (unit is 32-bit word)
* @retval 0: Data successfully written to Flash memory
* 1: Error occurred while writing data in Flash memory
* 2: Written Data in flash memory is different from expected one
*/
uint32_t FLASH_If_Write(uint32_t FlashAddress, uint32_t* Data ,uint32_t DataLength)
{
uint32_t i = 0;
for (i = 0; (i < DataLength) && (FlashAddress <= (USER_FLASH_END_ADDRESS-4)); i++)
{
/* Device voltage range supposed to be [2.7V to 3.6V], the operation will
be done by word */
if (HAL_FLASH_Program(TYPEPROGRAM_WORD, FlashAddress, *(uint32_t*)(Data+i)) == HAL_OK)
{
/* Check the written value */
if (*(uint32_t*)FlashAddress != *(uint32_t*)(Data+i))
{
/* Flash content doesn't match SRAM content */
return(FLASHIF_WRITINGCTRL_ERROR);
}
/* Increment FLASH destination address */
FlashAddress += 4;
}
else
{
/* Error occurred while writing data in Flash memory */
return (FLASHIF_WRITING_ERROR);
}
}
return (FLASHIF_OK);
}
/**
* @brief Returns the write protection status of user flash area.
* @param None
* @retval 0: No write protected sectors inside the user flash area
* 1: Some sectors inside the user flash area are write protected
*/
uint16_t FLASH_If_GetWriteProtectionStatus(void)
{
uint32_t ProtectedSECTOR = 0xFFF;
FLASH_OBProgramInitTypeDef OptionsBytesStruct;
/* Unlock the Flash to enable the flash control register access *************/
HAL_FLASH_Unlock();
/* Check if there are write protected sectors inside the user flash area ****/
HAL_FLASHEx_OBGetConfig(&OptionsBytesStruct);
/* Lock the Flash to disable the flash control register access (recommended
to protect the FLASH memory against possible unwanted operation) *********/
HAL_FLASH_Lock();
/* Get pages already write protected ****************************************/
ProtectedSECTOR = ~(OptionsBytesStruct.WRPSector) & FLASH_SECTOR_TO_BE_PROTECTED;
/* Check if desired pages are already write protected ***********************/
if(ProtectedSECTOR != 0)
{
/* Some sectors inside the user flash area are write protected */
return FLASHIF_PROTECTION_WRPENABLED;
}
else
{
/* No write protected sectors inside the user flash area */
return FLASHIF_PROTECTION_NONE;
}
}
/**
* @brief Gets the sector of a given address
* @param Address: Flash address
* @retval The sector of a given address
*/
static uint32_t GetSector(uint32_t Address)
{
uint32_t sector = 0;
if((Address < ADDR_FLASH_SECTOR_1) && (Address >= ADDR_FLASH_SECTOR_0))
{
sector = FLASH_SECTOR_0;
}
else if((Address < ADDR_FLASH_SECTOR_2) && (Address >= ADDR_FLASH_SECTOR_1))
{
sector = FLASH_SECTOR_1;
}
else if((Address < ADDR_FLASH_SECTOR_3) && (Address >= ADDR_FLASH_SECTOR_2))
{
sector = FLASH_SECTOR_2;
}
else if((Address < ADDR_FLASH_SECTOR_4) && (Address >= ADDR_FLASH_SECTOR_3))
{
sector = FLASH_SECTOR_3;
}
else if((Address < ADDR_FLASH_SECTOR_5) && (Address >= ADDR_FLASH_SECTOR_4))
{
sector = FLASH_SECTOR_4;
}
else if((Address < ADDR_FLASH_SECTOR_6) && (Address >= ADDR_FLASH_SECTOR_5))
{
sector = FLASH_SECTOR_5;
}
else if((Address < ADDR_FLASH_SECTOR_7) && (Address >= ADDR_FLASH_SECTOR_6))
{
sector = FLASH_SECTOR_6;
}
else if((Address < ADDR_FLASH_SECTOR_8) && (Address >= ADDR_FLASH_SECTOR_7))
{
sector = FLASH_SECTOR_7;
}
else if((Address < ADDR_FLASH_SECTOR_9) && (Address >= ADDR_FLASH_SECTOR_8))
{
sector = FLASH_SECTOR_8;
}
else if((Address < ADDR_FLASH_SECTOR_10) && (Address >= ADDR_FLASH_SECTOR_9))
{
sector = FLASH_SECTOR_9;
}
else if((Address < ADDR_FLASH_SECTOR_11) && (Address >= ADDR_FLASH_SECTOR_10))
{
sector = FLASH_SECTOR_10;
}
else /*(Address < FLASH_END_ADDR) && (Address >= ADDR_FLASH_SECTOR_11))*/
{
sector = FLASH_SECTOR_11;
}
return sector;
}
/**
* @brief Configure the write protection status of user flash area.
* @param modifier DISABLE or ENABLE the protection
* @retval HAL_StatusTypeDef HAL_OK if change is applied.
*/
HAL_StatusTypeDef FLASH_If_WriteProtectionConfig(uint32_t modifier)
{
uint32_t ProtectedSECTOR = 0xFFF;
FLASH_OBProgramInitTypeDef config_new, config_old;
HAL_StatusTypeDef result = HAL_OK;
/* Get pages write protection status ****************************************/
HAL_FLASHEx_OBGetConfig(&config_old);
/* The parameter says whether we turn the protection on or off */
config_new.WRPState = modifier;
/* We want to modify only the Write protection */
config_new.OptionType = OPTIONBYTE_WRP;
/* No read protection, keep BOR and reset settings */
config_new.RDPLevel = OB_RDP_LEVEL_0;
config_new.USERConfig = config_old.USERConfig;
/* Get pages already write protected ****************************************/
ProtectedSECTOR = config_old.WRPSector | FLASH_SECTOR_TO_BE_PROTECTED;
/* Unlock the Flash to enable the flash control register access *************/
HAL_FLASH_Unlock();
/* Unlock the Options Bytes *************************************************/
HAL_FLASH_OB_Unlock();
config_new.WRPSector = ProtectedSECTOR;
result = HAL_FLASHEx_OBProgram(&config_new);
return result;
}
/**
* @}
*/