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// /**
// ******************************************************************************
// * @file EEPROM_Emulation/src/eeprom.c
// * @author MCD Application Team
// * @version V1.0.0
// * @date 10-October-2011
// * @brief This file provides all the EEPROM emulation firmware functions.
// ******************************************************************************
// * @attention
// *
// * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
// * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
// * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
// * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
// * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
// * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
// *
// * <h2><center>© COPYRIGHT 2011 STMicroelectronics</center></h2>
// ******************************************************************************
// */
//
// /** @addtogroup EEPROM_Emulation
// * @{
// */
//
// /* Includes ------------------------------------------------------------------*/
// #include "eeprom.h"
// #include "stm32f4xx_conf.h"
//
// /* Private typedef -----------------------------------------------------------*/
// /* Private define ------------------------------------------------------------*/
// /* Private macro -------------------------------------------------------------*/
// /* Private variables ---------------------------------------------------------*/
//
// /* Global variable used to store variable value in read sequence */
// uint16_t DataVar = 0;
//
// /* Virtual address defined by the user: 0xFFFF value is prohibited */
// //extern uint16_t VirtAddVarTab[NB_OF_VAR];
//
// /* Private function prototypes -----------------------------------------------*/
// /* Private functions ---------------------------------------------------------*/
// static FLASH_Status EE_Format(void);
// static uint16_t EE_FindValidPage(uint8_t Operation);
// static uint16_t EE_VerifyPageFullWriteVariable(uint16_t VirtAddress, uint16_t Data);
// static uint16_t EE_PageTransfer(uint16_t VirtAddress, uint16_t Data);
//
// /**
// * @brief Restore the pages to a known good state in case of page's status
// * corruption after a power loss.
// * @param None.
// * @retval - Flash error code: on write Flash error
// * - FLASH_COMPLETE: on success
// */
// uint16_t EE_Init(void)
// {
// uint16_t PageStatus0 = 6, PageStatus1 = 6;
// uint16_t VarIdx = 0;
// uint16_t EepromStatus = 0, ReadStatus = 0;
// int16_t x = -1;
// uint16_t FlashStatus;
//
// /* Get Page0 status */
// PageStatus0 = (*(__IO uint16_t*)PAGE0_BASE_ADDRESS);
// /* Get Page1 status */
// PageStatus1 = (*(__IO uint16_t*)PAGE1_BASE_ADDRESS);
//
// /* Check for invalid header states and repair if necessary */
// switch (PageStatus0)
// {
// case ERASED:
// if (PageStatus1 == VALID_PAGE) /* Page0 erased, Page1 valid */
// {
// /* Erase Page0 */
// FlashStatus = FLASH_EraseSector(PAGE0_ID,VOLTAGE_RANGE);
// /* If erase operation was failed, a Flash error code is returned */
// if (FlashStatus != FLASH_COMPLETE)
// {
// return FlashStatus;
// }
// }
// else if (PageStatus1 == RECEIVE_DATA) /* Page0 erased, Page1 receive */
// {
// /* Erase Page0 */
// FlashStatus = FLASH_EraseSector(PAGE0_ID, VOLTAGE_RANGE);
// /* If erase operation was failed, a Flash error code is returned */
// if (FlashStatus != FLASH_COMPLETE)
// {
// return FlashStatus;
// }
// /* Mark Page1 as valid */
// FlashStatus = FLASH_ProgramHalfWord(PAGE1_BASE_ADDRESS, VALID_PAGE);
// /* If program operation was failed, a Flash error code is returned */
// if (FlashStatus != FLASH_COMPLETE)
// {
// return FlashStatus;
// }
// }
// else /* First EEPROM access (Page0&1 are erased) or invalid state -> format EEPROM */
// {
// /* Erase both Page0 and Page1 and set Page0 as valid page */
// FlashStatus = EE_Format();
// /* If erase/program operation was failed, a Flash error code is returned */
// if (FlashStatus != FLASH_COMPLETE)
// {
// return FlashStatus;
// }
// }
// break;
//
// case RECEIVE_DATA:
// if (PageStatus1 == VALID_PAGE) /* Page0 receive, Page1 valid */
// {
// /* Transfer data from Page1 to Page0 */
// for (VarIdx = 0; VarIdx < NB_OF_VAR; VarIdx++)
// {
// if (( *(__IO uint16_t*)(PAGE0_BASE_ADDRESS + 6)) == VarIdx)
// {
// x = VarIdx;
// }
// if (VarIdx != x)
// {
// /* Read the last variables' updates */
// ReadStatus = EE_ReadVariable(VarIdx, &DataVar);
// /* In case variable corresponding to the virtual address was found */
// if (ReadStatus != 0x1)
// {
// /* Transfer the variable to the Page0 */
// EepromStatus = EE_VerifyPageFullWriteVariable(VarIdx, DataVar);
// /* If program operation was failed, a Flash error code is returned */
// if (EepromStatus != FLASH_COMPLETE)
// {
// return EepromStatus;
// }
// }
// }
// }
// /* Mark Page0 as valid */
// FlashStatus = FLASH_ProgramHalfWord(PAGE0_BASE_ADDRESS, VALID_PAGE);
// /* If program operation was failed, a Flash error code is returned */
// if (FlashStatus != FLASH_COMPLETE)
// {
// return FlashStatus;
// }
// /* Erase Page1 */
// FlashStatus = FLASH_EraseSector(PAGE1_ID, VOLTAGE_RANGE);
// /* If erase operation was failed, a Flash error code is returned */
// if (FlashStatus != FLASH_COMPLETE)
// {
// return FlashStatus;
// }
// }
// else if (PageStatus1 == ERASED) /* Page0 receive, Page1 erased */
// {
// /* Erase Page1 */
// FlashStatus = FLASH_EraseSector(PAGE1_ID, VOLTAGE_RANGE);
// /* If erase operation was failed, a Flash error code is returned */
// if (FlashStatus != FLASH_COMPLETE)
// {
// return FlashStatus;
// }
// /* Mark Page0 as valid */
// FlashStatus = FLASH_ProgramHalfWord(PAGE0_BASE_ADDRESS, VALID_PAGE);
// /* If program operation was failed, a Flash error code is returned */
// if (FlashStatus != FLASH_COMPLETE)
// {
// return FlashStatus;
// }
// }
// else /* Invalid state -> format eeprom */
// {
// /* Erase both Page0 and Page1 and set Page0 as valid page */
// FlashStatus = EE_Format();
// /* If erase/program operation was failed, a Flash error code is returned */
// if (FlashStatus != FLASH_COMPLETE)
// {
// return FlashStatus;
// }
// }
// break;
//
// case VALID_PAGE:
// if (PageStatus1 == VALID_PAGE) /* Invalid state -> format eeprom */
// {
// /* Erase both Page0 and Page1 and set Page0 as valid page */
// FlashStatus = EE_Format();
// /* If erase/program operation was failed, a Flash error code is returned */
// if (FlashStatus != FLASH_COMPLETE)
// {
// return FlashStatus;
// }
// }
// else if (PageStatus1 == ERASED) /* Page0 valid, Page1 erased */
// {
// /* Erase Page1 */
// FlashStatus = FLASH_EraseSector(PAGE1_ID, VOLTAGE_RANGE);
// /* If erase operation was failed, a Flash error code is returned */
// if (FlashStatus != FLASH_COMPLETE)
// {
// return FlashStatus;
// }
// }
// else /* Page0 valid, Page1 receive */
// {
// /* Transfer data from Page0 to Page1 */
// for (VarIdx = 0; VarIdx < NB_OF_VAR; VarIdx++)
// {
// if ((*(__IO uint16_t*)(PAGE1_BASE_ADDRESS + 6)) == VarIdx)
// {
// x = VarIdx;
// }
// if (VarIdx != x)
// {
// /* Read the last variables' updates */
// ReadStatus = EE_ReadVariable(VarIdx, &DataVar);
// /* In case variable corresponding to the virtual address was found */
// if (ReadStatus != 0x1)
// {
// /* Transfer the variable to the Page1 */
// EepromStatus = EE_VerifyPageFullWriteVariable(VarIdx, DataVar);
// /* If program operation was failed, a Flash error code is returned */
// if (EepromStatus != FLASH_COMPLETE)
// {
// return EepromStatus;
// }
// }
// }
// }
// /* Mark Page1 as valid */
// FlashStatus = FLASH_ProgramHalfWord(PAGE1_BASE_ADDRESS, VALID_PAGE);
// /* If program operation was failed, a Flash error code is returned */
// if (FlashStatus != FLASH_COMPLETE)
// {
// return FlashStatus;
// }
// /* Erase Page0 */
// FlashStatus = FLASH_EraseSector(PAGE0_ID, VOLTAGE_RANGE);
// /* If erase operation was failed, a Flash error code is returned */
// if (FlashStatus != FLASH_COMPLETE)
// {
// return FlashStatus;
// }
// }
// break;
//
// default: /* Any other state -> format eeprom */
// /* Erase both Page0 and Page1 and set Page0 as valid page */
// FlashStatus = EE_Format();
// /* If erase/program operation was failed, a Flash error code is returned */
// if (FlashStatus != FLASH_COMPLETE)
// {
// return FlashStatus;
// }
// break;
// }
//
// return FLASH_COMPLETE;
// }
//
// /**
// * @brief Returns the last stored variable data, if found, which correspond to
// * the passed virtual address
// * @param VirtAddress: Variable virtual address
// * @param Data: Global variable contains the read variable value
// * @retval Success or error status:
// * - 0: if variable was found
// * - 1: if the variable was not found
// * - NO_VALID_PAGE: if no valid page was found.
// */
// uint16_t EE_ReadVariable(uint16_t VirtAddress, uint16_t* Data)
// {
// uint16_t ValidPage = PAGE0;
// uint16_t AddressValue = 0x5555, ReadStatus = 1;
// uint32_t Address = EEPROM_START_ADDRESS, PageStartAddress = EEPROM_START_ADDRESS;
//
// /* Get active Page for read operation */
// ValidPage = EE_FindValidPage(READ_FROM_VALID_PAGE);
//
// /* Check if there is no valid page */
// if (ValidPage == NO_VALID_PAGE)
// {
// return NO_VALID_PAGE;
// }
//
// /* Get the valid Page start Address */
// PageStartAddress = (uint32_t)(EEPROM_START_ADDRESS + (uint32_t)(ValidPage * PAGE_SIZE));
//
// /* Get the valid Page end Address */
// Address = (uint32_t)((EEPROM_START_ADDRESS - 2) + (uint32_t)((1 + ValidPage) * PAGE_SIZE));
//
// /* Check each active page address starting from end */
// while (Address > (PageStartAddress + 2))
// {
// /* Get the current location content to be compared with virtual address */
// AddressValue = (*(__IO uint16_t*)Address);
//
// /* Compare the read address with the virtual address */
// if (AddressValue == VirtAddress)
// {
// /* Get content of Address-2 which is variable value */
// *Data = (*(__IO uint16_t*)(Address - 2));
//
// /* In case variable value is read, reset ReadStatus flag */
// ReadStatus = 0;
//
// break;
// }
// else
// {
// /* Next address location */
// Address = Address - 4;
// }
// }
//
// /* Return ReadStatus value: (0: variable exist, 1: variable doesn't exist) */
// return ReadStatus;
// }
//
// /**
// * @brief Writes/upadtes variable data in EEPROM.
// * @param VirtAddress: Variable virtual address
// * @param Data: 16 bit data to be written
// * @retval Success or error status:
// * - FLASH_COMPLETE: on success
// * - PAGE_FULL: if valid page is full
// * - NO_VALID_PAGE: if no valid page was found
// * - Flash error code: on write Flash error
// */
// uint16_t EE_WriteVariable(uint16_t VirtAddress, uint16_t Data)
// {
// uint16_t Status = 0;
//
// /* Write the variable virtual address and value in the EEPROM */
// Status = EE_VerifyPageFullWriteVariable(VirtAddress, Data);
//
// /* In case the EEPROM active page is full */
// if (Status == PAGE_FULL)
// {
// /* Perform Page transfer */
// Status = EE_PageTransfer(VirtAddress, Data);
// }
//
// /* Return last operation status */
// return Status;
// }
//
// /**
// * @brief Erases PAGE and PAGE1 and writes VALID_PAGE header to PAGE
// * @param None
// * @retval Status of the last operation (Flash write or erase) done during
// * EEPROM formating
// */
// static FLASH_Status EE_Format(void)
// {
// FLASH_Status FlashStatus = FLASH_COMPLETE;
//
// /* Erase Page0 */
// FlashStatus = FLASH_EraseSector(PAGE0_ID, VOLTAGE_RANGE);
//
// /* If erase operation was failed, a Flash error code is returned */
// if (FlashStatus != FLASH_COMPLETE)
// {
// return FlashStatus;
// }
//
// /* Set Page0 as valid page: Write VALID_PAGE at Page0 base address */
// FlashStatus = FLASH_ProgramHalfWord(PAGE0_BASE_ADDRESS, VALID_PAGE);
//
// /* If program operation was failed, a Flash error code is returned */
// if (FlashStatus != FLASH_COMPLETE)
// {
// return FlashStatus;
// }
//
// /* Erase Page1 */
// FlashStatus = FLASH_EraseSector(PAGE1_ID, VOLTAGE_RANGE);
//
// /* Return Page1 erase operation status */
// return FlashStatus;
// }
//
// /**
// * @brief Find valid Page for write or read operation
// * @param Operation: operation to achieve on the valid page.
// * This parameter can be one of the following values:
// * @arg READ_FROM_VALID_PAGE: read operation from valid page
// * @arg WRITE_IN_VALID_PAGE: write operation from valid page
// * @retval Valid page number (PAGE or PAGE1) or NO_VALID_PAGE in case
// * of no valid page was found
// */
// static uint16_t EE_FindValidPage(uint8_t Operation)
// {
// uint16_t PageStatus0 = 6, PageStatus1 = 6;
//
// /* Get Page0 actual status */
// PageStatus0 = (*(__IO uint16_t*)PAGE0_BASE_ADDRESS);
//
// /* Get Page1 actual status */
// PageStatus1 = (*(__IO uint16_t*)PAGE1_BASE_ADDRESS);
//
// /* Write or read operation */
// switch (Operation)
// {
// case WRITE_IN_VALID_PAGE: /* ---- Write operation ---- */
// if (PageStatus1 == VALID_PAGE)
// {
// /* Page0 receiving data */
// if (PageStatus0 == RECEIVE_DATA)
// {
// return PAGE0; /* Page0 valid */
// }
// else
// {
// return PAGE1; /* Page1 valid */
// }
// }
// else if (PageStatus0 == VALID_PAGE)
// {
// /* Page1 receiving data */
// if (PageStatus1 == RECEIVE_DATA)
// {
// return PAGE1; /* Page1 valid */
// }
// else
// {
// return PAGE0; /* Page0 valid */
// }
// }
// else
// {
// return NO_VALID_PAGE; /* No valid Page */
// }
//
// case READ_FROM_VALID_PAGE: /* ---- Read operation ---- */
// if (PageStatus0 == VALID_PAGE)
// {
// return PAGE0; /* Page0 valid */
// }
// else if (PageStatus1 == VALID_PAGE)
// {
// return PAGE1; /* Page1 valid */
// }
// else
// {
// return NO_VALID_PAGE ; /* No valid Page */
// }
//
// default:
// return PAGE0; /* Page0 valid */
// }
// }
//
// /**
// * @brief Verify if active page is full and Writes variable in EEPROM.
// * @param VirtAddress: 16 bit virtual address of the variable
// * @param Data: 16 bit data to be written as variable value
// * @retval Success or error status:
// * - FLASH_COMPLETE: on success
// * - PAGE_FULL: if valid page is full
// * - NO_VALID_PAGE: if no valid page was found
// * - Flash error code: on write Flash error
// */
// static uint16_t EE_VerifyPageFullWriteVariable(uint16_t VirtAddress, uint16_t Data)
// {
// FLASH_Status FlashStatus = FLASH_COMPLETE;
// uint16_t ValidPage = PAGE0;
// uint32_t Address = EEPROM_START_ADDRESS, PageEndAddress = EEPROM_START_ADDRESS+PAGE_SIZE;
//
// /* Get valid Page for write operation */
// ValidPage = EE_FindValidPage(WRITE_IN_VALID_PAGE);
//
// /* Check if there is no valid page */
// if (ValidPage == NO_VALID_PAGE)
// {
// return NO_VALID_PAGE;
// }
//
// /* Get the valid Page start Address */
// Address = (uint32_t)(EEPROM_START_ADDRESS + (uint32_t)(ValidPage * PAGE_SIZE));
//
// /* Get the valid Page end Address */
// PageEndAddress = (uint32_t)((EEPROM_START_ADDRESS - 2) + (uint32_t)((1 + ValidPage) * PAGE_SIZE));
//
// /* Check each active page address starting from begining */
// while (Address < PageEndAddress)
// {
// /* Verify if Address and Address+2 contents are 0xFFFFFFFF */
// if ((*(__IO uint32_t*)Address) == 0xFFFFFFFF)
// {
// /* Set variable data */
// FlashStatus = FLASH_ProgramHalfWord(Address, Data);
// /* If program operation was failed, a Flash error code is returned */
// if (FlashStatus != FLASH_COMPLETE)
// {
// return FlashStatus;
// }
// /* Set variable virtual address */
// FlashStatus = FLASH_ProgramHalfWord(Address + 2, VirtAddress);
// /* Return program operation status */
// return FlashStatus;
// }
// else
// {
// /* Next address location */
// Address = Address + 4;
// }
// }
//
// /* Return PAGE_FULL in case the valid page is full */
// return PAGE_FULL;
// }
//
// /**
// * @brief Transfers last updated variables data from the full Page to
// * an empty one.
// * @param VirtAddress: 16 bit virtual address of the variable
// * @param Data: 16 bit data to be written as variable value
// * @retval Success or error status:
// * - FLASH_COMPLETE: on success
// * - PAGE_FULL: if valid page is full
// * - NO_VALID_PAGE: if no valid page was found
// * - Flash error code: on write Flash error
// */
// static uint16_t EE_PageTransfer(uint16_t VirtAddress, uint16_t Data)
// {
// FLASH_Status FlashStatus = FLASH_COMPLETE;
// uint32_t NewPageAddress = EEPROM_START_ADDRESS;
// uint16_t OldPageId=0;
// uint16_t ValidPage = PAGE0, VarIdx = 0;
// uint16_t EepromStatus = 0, ReadStatus = 0;
//
// /* Get active Page for read operation */
// ValidPage = EE_FindValidPage(READ_FROM_VALID_PAGE);
//
// if (ValidPage == PAGE1) /* Page1 valid */
// {
// /* New page address where variable will be moved to */
// NewPageAddress = PAGE0_BASE_ADDRESS;
//
// /* Old page ID where variable will be taken from */
// OldPageId = PAGE1_ID;
// }
// else if (ValidPage == PAGE0) /* Page0 valid */
// {
// /* New page address where variable will be moved to */
// NewPageAddress = PAGE1_BASE_ADDRESS;
//
// /* Old page ID where variable will be taken from */
// OldPageId = PAGE0_ID;
// }
// else
// {
// return NO_VALID_PAGE; /* No valid Page */
// }
//
// /* Set the new Page status to RECEIVE_DATA status */
// FlashStatus = FLASH_ProgramHalfWord(NewPageAddress, RECEIVE_DATA);
// /* If program operation was failed, a Flash error code is returned */
// if (FlashStatus != FLASH_COMPLETE)
// {
// return FlashStatus;
// }
//
// /* Write the variable passed as parameter in the new active page */
// EepromStatus = EE_VerifyPageFullWriteVariable(VirtAddress, Data);
// /* If program operation was failed, a Flash error code is returned */
// if (EepromStatus != FLASH_COMPLETE)
// {
// return EepromStatus;
// }
//
// /* Transfer process: transfer variables from old to the new active page */
// for (VarIdx = 0; VarIdx < NB_OF_VAR; VarIdx++)
// {
// if (VarIdx != VirtAddress) /* Check each variable except the one passed as parameter */
// {
// /* Read the other last variable updates */
// ReadStatus = EE_ReadVariable(VarIdx, &DataVar);
// /* In case variable corresponding to the virtual address was found */
// if (ReadStatus != 0x1)
// {
// /* Transfer the variable to the new active page */
// EepromStatus = EE_VerifyPageFullWriteVariable(VarIdx, DataVar);
// /* If program operation was failed, a Flash error code is returned */
// if (EepromStatus != FLASH_COMPLETE)
// {
// return EepromStatus;
// }
// }
// }
// }
//
// /* Erase the old Page: Set old Page status to ERASED status */
// FlashStatus = FLASH_EraseSector(OldPageId, VOLTAGE_RANGE);
// /* If erase operation was failed, a Flash error code is returned */
// if (FlashStatus != FLASH_COMPLETE)
// {
// return FlashStatus;
// }
//
// /* Set new Page status to VALID_PAGE status */
// FlashStatus = FLASH_ProgramHalfWord(NewPageAddress, VALID_PAGE);
// /* If program operation was failed, a Flash error code is returned */
// if (FlashStatus != FLASH_COMPLETE)
// {
// return FlashStatus;
// }
//
// /* Return last operation flash status */
// return FlashStatus;
// }
//
// /**
// * @}
// */
//
// /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/
0d70023baThis file is pinned to the selected release. Download the original to open it in your design tool.