715 lines
23 KiB
C
715 lines
23 KiB
C
/**
|
|
******************************************************************************
|
|
* @file EEPROM_Emulation/src/eeprom.c
|
|
* @author MCD Application Team
|
|
* @brief This file provides all the EEPROM emulation firmware functions.
|
|
******************************************************************************
|
|
* @attention
|
|
*
|
|
* <h2><center>© 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
|
|
*
|
|
******************************************************************************
|
|
*/
|
|
|
|
/** @addtogroup EEPROM_Emulation
|
|
* @{
|
|
*/
|
|
|
|
/* Includes ------------------------------------------------------------------*/
|
|
#include "eeprom.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 HAL_StatusTypeDef 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);
|
|
static uint16_t EE_VerifyPageFullyErased(uint32_t Address);
|
|
|
|
/**
|
|
* @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;
|
|
HAL_StatusTypeDef flashstatus;
|
|
uint32_t page_error = 0;
|
|
FLASH_EraseInitTypeDef s_eraseinit;
|
|
|
|
|
|
/* Get Page0 status */
|
|
pagestatus0 = (*(__IO uint16_t*)PAGE0_BASE_ADDRESS);
|
|
/* Get Page1 status */
|
|
pagestatus1 = (*(__IO uint16_t*)PAGE1_BASE_ADDRESS);
|
|
|
|
/* Fill EraseInit structure*/
|
|
s_eraseinit.TypeErase = FLASH_TYPEERASE_PAGES;
|
|
s_eraseinit.PageAddress = PAGE0_ID;
|
|
s_eraseinit.NbPages = 1;
|
|
|
|
/* Check for invalid header states and repair if necessary */
|
|
switch (pagestatus0)
|
|
{
|
|
case ERASED:
|
|
if (pagestatus1 == VALID_PAGE) /* Page0 erased, Page1 valid */
|
|
{
|
|
/* Erase Page0 */
|
|
if(!EE_VerifyPageFullyErased(PAGE0_BASE_ADDRESS))
|
|
{
|
|
flashstatus = HAL_FLASHEx_Erase(&s_eraseinit, &page_error);
|
|
/* If erase operation was failed, a Flash error code is returned */
|
|
if (flashstatus != HAL_OK)
|
|
{
|
|
return flashstatus;
|
|
}
|
|
}
|
|
}
|
|
else if (pagestatus1 == RECEIVE_DATA) /* Page0 erased, Page1 receive */
|
|
{
|
|
/* Erase Page0 */
|
|
if(!EE_VerifyPageFullyErased(PAGE0_BASE_ADDRESS))
|
|
{
|
|
flashstatus = HAL_FLASHEx_Erase(&s_eraseinit, &page_error);
|
|
/* If erase operation was failed, a Flash error code is returned */
|
|
if (flashstatus != HAL_OK)
|
|
{
|
|
return flashstatus;
|
|
}
|
|
}
|
|
/* Mark Page1 as valid */
|
|
flashstatus = HAL_FLASH_Program(FLASH_TYPEPROGRAM_HALFWORD, PAGE1_BASE_ADDRESS, VALID_PAGE);
|
|
/* If program operation was failed, a Flash error code is returned */
|
|
if (flashstatus != HAL_OK)
|
|
{
|
|
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 != HAL_OK)
|
|
{
|
|
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)) == VirtAddVarTab[varidx])
|
|
{
|
|
x = varidx;
|
|
}
|
|
if (varidx != x)
|
|
{
|
|
/* Read the last variables' updates */
|
|
readstatus = EE_ReadVariable(VirtAddVarTab[varidx], &DataVar);
|
|
/* In case variable corresponding to the virtual address was found */
|
|
if (readstatus != 0x1)
|
|
{
|
|
/* Transfer the variable to the Page0 */
|
|
eepromstatus = EE_VerifyPageFullWriteVariable(VirtAddVarTab[varidx], DataVar);
|
|
/* If program operation was failed, a Flash error code is returned */
|
|
if (eepromstatus != HAL_OK)
|
|
{
|
|
return eepromstatus;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
/* Mark Page0 as valid */
|
|
flashstatus = HAL_FLASH_Program(FLASH_TYPEPROGRAM_HALFWORD, PAGE0_BASE_ADDRESS, VALID_PAGE);
|
|
/* If program operation was failed, a Flash error code is returned */
|
|
if (flashstatus != HAL_OK)
|
|
{
|
|
return flashstatus;
|
|
}
|
|
s_eraseinit.TypeErase = FLASH_TYPEERASE_PAGES;
|
|
s_eraseinit.PageAddress = PAGE1_ID;
|
|
s_eraseinit.NbPages = 1;
|
|
/* Erase Page1 */
|
|
if(!EE_VerifyPageFullyErased(PAGE1_BASE_ADDRESS))
|
|
{
|
|
flashstatus = HAL_FLASHEx_Erase(&s_eraseinit, &page_error);
|
|
/* If erase operation was failed, a Flash error code is returned */
|
|
if (flashstatus != HAL_OK)
|
|
{
|
|
return flashstatus;
|
|
}
|
|
}
|
|
}
|
|
else if (pagestatus1 == ERASED) /* Page0 receive, Page1 erased */
|
|
{
|
|
s_eraseinit.TypeErase = FLASH_TYPEERASE_PAGES;
|
|
s_eraseinit.PageAddress = PAGE1_ID;
|
|
s_eraseinit.NbPages = 1;
|
|
/* Erase Page1 */
|
|
if(!EE_VerifyPageFullyErased(PAGE1_BASE_ADDRESS))
|
|
{
|
|
flashstatus = HAL_FLASHEx_Erase(&s_eraseinit, &page_error);
|
|
/* If erase operation was failed, a Flash error code is returned */
|
|
if (flashstatus != HAL_OK)
|
|
{
|
|
return flashstatus;
|
|
}
|
|
}
|
|
/* Mark Page0 as valid */
|
|
flashstatus = HAL_FLASH_Program(FLASH_TYPEPROGRAM_HALFWORD, PAGE0_BASE_ADDRESS, VALID_PAGE);
|
|
/* If program operation was failed, a Flash error code is returned */
|
|
if (flashstatus != HAL_OK)
|
|
{
|
|
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 != HAL_OK)
|
|
{
|
|
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 != HAL_OK)
|
|
{
|
|
return flashstatus;
|
|
}
|
|
}
|
|
else if (pagestatus1 == ERASED) /* Page0 valid, Page1 erased */
|
|
{
|
|
s_eraseinit.TypeErase = FLASH_TYPEERASE_PAGES;
|
|
s_eraseinit.PageAddress = PAGE1_ID;
|
|
s_eraseinit.NbPages = 1;
|
|
/* Erase Page1 */
|
|
if(!EE_VerifyPageFullyErased(PAGE1_BASE_ADDRESS))
|
|
{
|
|
flashstatus = HAL_FLASHEx_Erase(&s_eraseinit, &page_error);
|
|
/* If erase operation was failed, a Flash error code is returned */
|
|
if (flashstatus != HAL_OK)
|
|
{
|
|
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)) == VirtAddVarTab[varidx])
|
|
{
|
|
x = varidx;
|
|
}
|
|
if (varidx != x)
|
|
{
|
|
/* Read the last variables' updates */
|
|
readstatus = EE_ReadVariable(VirtAddVarTab[varidx], &DataVar);
|
|
/* In case variable corresponding to the virtual address was found */
|
|
if (readstatus != 0x1)
|
|
{
|
|
/* Transfer the variable to the Page1 */
|
|
eepromstatus = EE_VerifyPageFullWriteVariable(VirtAddVarTab[varidx], DataVar);
|
|
/* If program operation was failed, a Flash error code is returned */
|
|
if (eepromstatus != HAL_OK)
|
|
{
|
|
return eepromstatus;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
/* Mark Page1 as valid */
|
|
flashstatus = HAL_FLASH_Program(FLASH_TYPEPROGRAM_HALFWORD, PAGE1_BASE_ADDRESS, VALID_PAGE);
|
|
/* If program operation was failed, a Flash error code is returned */
|
|
if (flashstatus != HAL_OK)
|
|
{
|
|
return flashstatus;
|
|
}
|
|
s_eraseinit.TypeErase = FLASH_TYPEERASE_PAGES;
|
|
s_eraseinit.PageAddress = PAGE0_ID;
|
|
s_eraseinit.NbPages = 1;
|
|
/* Erase Page0 */
|
|
if(!EE_VerifyPageFullyErased(PAGE0_BASE_ADDRESS))
|
|
{
|
|
flashstatus = HAL_FLASHEx_Erase(&s_eraseinit, &page_error);
|
|
/* If erase operation was failed, a Flash error code is returned */
|
|
if (flashstatus != HAL_OK)
|
|
{
|
|
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 != HAL_OK)
|
|
{
|
|
return flashstatus;
|
|
}
|
|
break;
|
|
}
|
|
|
|
return HAL_OK;
|
|
}
|
|
|
|
/**
|
|
* @brief Verify if specified page is fully erased.
|
|
* @param Address: page address
|
|
* This parameter can be one of the following values:
|
|
* @arg PAGE0_BASE_ADDRESS: Page0 base address
|
|
* @arg PAGE1_BASE_ADDRESS: Page1 base address
|
|
* @retval page fully erased status:
|
|
* - 0: if Page not erased
|
|
* - 1: if Page erased
|
|
*/
|
|
uint16_t EE_VerifyPageFullyErased(uint32_t Address)
|
|
{
|
|
uint32_t endAddress;
|
|
uint32_t readstatus = 1;
|
|
uint16_t addressvalue = 0x5555;
|
|
|
|
/* Compute page end-address */
|
|
endAddress = (uint32_t)(Address + (PAGE_SIZE - 4U));
|
|
|
|
/* Check each active page address starting from end */
|
|
while (Address <= endAddress)
|
|
{
|
|
/* 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 != ERASED)
|
|
{
|
|
|
|
/* In case variable value is read, reset readstatus flag */
|
|
readstatus = 0;
|
|
|
|
break;
|
|
}
|
|
/* Next address location */
|
|
Address = Address + 4;
|
|
}
|
|
|
|
/* Return readstatus value: (0: Page not erased, 1: Page erased) */
|
|
return readstatus;
|
|
}
|
|
|
|
/**
|
|
* @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 HAL_StatusTypeDef EE_Format(void)
|
|
{
|
|
HAL_StatusTypeDef flashstatus = HAL_OK;
|
|
uint32_t page_error = 0;
|
|
FLASH_EraseInitTypeDef s_eraseinit;
|
|
|
|
s_eraseinit.TypeErase = FLASH_TYPEERASE_PAGES;
|
|
s_eraseinit.PageAddress = PAGE0_ID;
|
|
s_eraseinit.NbPages = 1;
|
|
/* Erase Page0 */
|
|
if(!EE_VerifyPageFullyErased(PAGE0_BASE_ADDRESS))
|
|
{
|
|
flashstatus = HAL_FLASHEx_Erase(&s_eraseinit, &page_error);
|
|
/* If erase operation was failed, a Flash error code is returned */
|
|
if (flashstatus != HAL_OK)
|
|
{
|
|
return flashstatus;
|
|
}
|
|
}
|
|
/* Set Page0 as valid page: Write VALID_PAGE at Page0 base address */
|
|
flashstatus = HAL_FLASH_Program(FLASH_TYPEPROGRAM_HALFWORD, PAGE0_BASE_ADDRESS, VALID_PAGE);
|
|
/* If program operation was failed, a Flash error code is returned */
|
|
if (flashstatus != HAL_OK)
|
|
{
|
|
return flashstatus;
|
|
}
|
|
|
|
s_eraseinit.PageAddress = PAGE1_ID;
|
|
/* Erase Page1 */
|
|
if(!EE_VerifyPageFullyErased(PAGE1_BASE_ADDRESS))
|
|
{
|
|
flashstatus = HAL_FLASHEx_Erase(&s_eraseinit, &page_error);
|
|
/* If erase operation was failed, a Flash error code is returned */
|
|
if (flashstatus != HAL_OK)
|
|
{
|
|
return flashstatus;
|
|
}
|
|
}
|
|
|
|
return HAL_OK;
|
|
}
|
|
|
|
/**
|
|
* @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)
|
|
{
|
|
HAL_StatusTypeDef flashstatus = HAL_OK;
|
|
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 - 1) + (uint32_t)((validpage + 1) * 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 = HAL_FLASH_Program(FLASH_TYPEPROGRAM_HALFWORD, address, Data);
|
|
/* If program operation was failed, a Flash error code is returned */
|
|
if (flashstatus != HAL_OK)
|
|
{
|
|
return flashstatus;
|
|
}
|
|
/* Set variable virtual address */
|
|
flashstatus = HAL_FLASH_Program(FLASH_TYPEPROGRAM_HALFWORD, 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)
|
|
{
|
|
HAL_StatusTypeDef flashstatus = HAL_OK;
|
|
uint32_t newpageaddress = EEPROM_START_ADDRESS;
|
|
uint32_t oldpageid = 0;
|
|
uint16_t validpage = PAGE0, varidx = 0;
|
|
uint16_t eepromstatus = 0, readstatus = 0;
|
|
uint32_t page_error = 0;
|
|
FLASH_EraseInitTypeDef s_eraseinit;
|
|
|
|
/* 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 = HAL_FLASH_Program(FLASH_TYPEPROGRAM_HALFWORD, newpageaddress, RECEIVE_DATA);
|
|
/* If program operation was failed, a Flash error code is returned */
|
|
if (flashstatus != HAL_OK)
|
|
{
|
|
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 != HAL_OK)
|
|
{
|
|
return eepromstatus;
|
|
}
|
|
|
|
/* Transfer process: transfer variables from old to the new active page */
|
|
for (varidx = 0; varidx < NB_OF_VAR; varidx++)
|
|
{
|
|
if (VirtAddVarTab[varidx] != VirtAddress) /* Check each variable except the one passed as parameter */
|
|
{
|
|
/* Read the other last variable updates */
|
|
readstatus = EE_ReadVariable(VirtAddVarTab[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(VirtAddVarTab[varidx], DataVar);
|
|
/* If program operation was failed, a Flash error code is returned */
|
|
if (eepromstatus != HAL_OK)
|
|
{
|
|
return eepromstatus;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
s_eraseinit.TypeErase = FLASH_TYPEERASE_PAGES;
|
|
s_eraseinit.PageAddress = oldpageid;
|
|
s_eraseinit.NbPages = 1;
|
|
|
|
/* Erase the old Page: Set old Page status to ERASED status */
|
|
flashstatus = HAL_FLASHEx_Erase(&s_eraseinit, &page_error);
|
|
/* If erase operation was failed, a Flash error code is returned */
|
|
if (flashstatus != HAL_OK)
|
|
{
|
|
return flashstatus;
|
|
}
|
|
|
|
/* Set new Page status to VALID_PAGE status */
|
|
flashstatus = HAL_FLASH_Program(FLASH_TYPEPROGRAM_HALFWORD, newpageaddress, VALID_PAGE);
|
|
/* If program operation was failed, a Flash error code is returned */
|
|
if (flashstatus != HAL_OK)
|
|
{
|
|
return flashstatus;
|
|
}
|
|
|
|
/* Return last operation flash status */
|
|
return flashstatus;
|
|
}
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
|