/**
* @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
* - EEPROM_BAD_ADDRESS: if address = 0xFFFF
* - EEPROM_PAGE_FULL: if valid page is full
* - EEPROM_NO_VALID_PAGE: if no valid page was found
* - EEPROM_OUT_SIZE: if no empty EEPROM variables
* - Flash error code: on write Flash error
*/
uint16 EEPROMClass::write(uint16 Address, uint16 Data)
{
if (Status == EEPROM_NOT_INIT)
if (init() != EEPROM_OK)
return Status;
if (Address == 0xFFFF)
return EEPROM_BAD_ADDRESS;
// Write the variable virtual address and value in the EEPROM
uint16 status = EE_VerifyPageFullWriteVariable(Address, Data);
return status;
}
/**
* @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;
}
static uint16_t EE_TransferVariable(uint16_t VirtAddress, uint32_t BaseAddress)
{
if (( *(__IO uint16_t*)(BaseAddress + 6)) != VirtAddress)
{
/* Read the last variables' updates */
uint16_t ReadStatus = EE_ReadVariable(VirtAddress, &DataVar);
/* In case variable corresponding to the virtual address was found */
if (ReadStatus != 0x1)
{
/* Transfer the variable to the new page */
return EE_VerifyPageFullWriteVariable(VirtAddress, DataVar);
}
}
return FLASH_COMPLETE;
}
/**
* @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_ErasePage(PAGE0_BASE_ADDRESS);
/* 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_ErasePage(PAGE0_BASE_ADDRESS);
/* 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 < NumbOfVar; VarIdx++) {
if((*(__IO uint16_t*)(PAGE0_BASE_ADDRESS + 6)) == VirtAddVarTab[VarIdx]) {
//前两个字节存PageStatus，随后每4字节为一组，先存数据值（前2字节），再存虚拟地址（后2字节），所以+6，是判断第一个组的虚拟地址:jkl
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 != 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_ErasePage(PAGE1_BASE_ADDRESS);
/* 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_ErasePage(PAGE1_BASE_ADDRESS);
/* 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_ErasePage(PAGE1_BASE_ADDRESS);
/* 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 < NumbOfVar; 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 != 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_ErasePage(PAGE0_BASE_ADDRESS);
/* 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 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 = 0x00000000, OldPageAddress = 0x00000000;
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 address where variable will be taken from */
OldPageAddress = PAGE1_BASE_ADDRESS;
} else if(ValidPage == PAGE0) { /* Page0 valid */
/* New page address where variable will be moved to */
NewPageAddress = PAGE1_BASE_ADDRESS;
/* Old page address where variable will be taken from */
OldPageAddress = PAGE0_BASE_ADDRESS;
} 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 < NumbOfVar; 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 != FLASH_COMPLETE) {
return EepromStatus;
}
}
}
}
/* Erase the old Page: Set old Page status to ERASED status */
FlashStatus = FLASH_ErasePage(OldPageAddress);
/* 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;
}
/**
* @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 = 0x080103FF, OldPageAddress = 0x08010000;
uint16_t ValidPage = PAGE0, VarIdx = 0;
uint16_t EepromStatus = 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 address where variable will be taken from */
OldPageAddress = PAGE1_BASE_ADDRESS;
}
else if (ValidPage == PAGE0) /* Page0 valid */
{
/* New page address where variable will be moved to */
NewPageAddress = PAGE1_BASE_ADDRESS;
/* Old page address where variable will be taken from */
OldPageAddress = PAGE0_BASE_ADDRESS;
}
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;
}
/* First transfer the contiguous region of addresses */
for (VarIdx = 0; VarIdx < EE_MAX_CONTIGUOUS; VarIdx++)
{
/* Check each variable except the one passed as parameter */
if (VarIdx != VirtAddress)
{
EepromStatus = EE_TransferVariable(VarIdx, NewPageAddress);
if (EepromStatus != FLASH_COMPLETE)
return EepromStatus;
}
}
/* Then the individual addresses in the address table */
for (VarIdx = 0; VarIdx < EE_NUM_ADDR; VarIdx++)
{
if (ee_addr_table[VarIdx] != VirtAddress)
{
EepromStatus = EE_TransferVariable(ee_addr_table[VarIdx], NewPageAddress);
if (EepromStatus != FLASH_COMPLETE)
return EepromStatus;
}
}
/* Erase the old Page: Set old Page status to ERASED status */
FlashStatus = FLASH_ErasePage(OldPageAddress);
/* 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;
}
/**
* @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 = PAGE1_BASE_ADDRESS, OldPageAddress = PAGE0_BASE_ADDRESS;
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 address where variable will be taken from */
OldPageAddress = PAGE1_BASE_ADDRESS;
}
else if (ValidPage == PAGE0) /* Page0 valid */
{
/* New page address where variable will be moved to */
NewPageAddress = PAGE1_BASE_ADDRESS;
/* Old page address where variable will be taken from */
OldPageAddress = PAGE0_BASE_ADDRESS;
}
else
{
return NO_VALID_PAGE; /* No valid Page */
}
//FLASH_Unlock();
/* 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)
{
//FLASH_Lock();
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)
{
//FLASH_Lock();
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 != FLASH_COMPLETE)
{
//FLASH_Lock();
return EepromStatus;
}
}
}
}
/* Erase the old Page: Set old Page status to ERASED status */
FlashStatus = eraseHelper(OldPageAddress);
/* If erase operation was failed, a Flash error code is returned */
if (FlashStatus != FLASH_COMPLETE)
{
//FLASH_Lock();
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)
{
//FLASH_Lock();
return FlashStatus;
}
// FIX from https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Flat.aspx?RootFolder=%2Fpublic%2FSTe2ecommunities%2Fmcu%2FLists%2Fcortex_mx_stm32%2FEEPROM%20emulation%20in%20STM32F4x%20family&FolderCTID=0x01200200770978C69A1141439FE559EB459D7580009C4E14902C3CDE46A77F0FFD06506F5B¤tviews=272
// /* Flush the caches by setting the DCRST and ICRST bits in the FLASH_CR register. Note: The I/D cache should be flushed only when it is disabled (I/DCEN = 0).*/
// FLASH->ACR &= ~(FLASH_ACR_ICEN |FLASH_ACR_DCEN);
// FLASH->ACR = (FLASH_ACR_ICRST |FLASH_ACR_DCRST);
// /* Now restore ( Enable I/D caches, clear the DCRST and ICRST bits */
// FLASH->ACR = (FLASH_ACR_ICEN |FLASH_ACR_DCEN);
// FLASH->ACR = ~(FLASH_ACR_ICRST |FLASH_ACR_DCRST);
//FLASH_Lock();
/* Return last operation flash status */
return FlashStatus;
}
/**
* @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 SectorError = 0;
FLASH_EraseInitTypeDef pEraseInit;
/* Get Page0 status */
PageStatus0 = (*(__IO uint16_t*)PAGE0_BASE_ADDRESS);
/* Get Page1 status */
PageStatus1 = (*(__IO uint16_t*)PAGE1_BASE_ADDRESS);
pEraseInit.TypeErase = TYPEERASE_SECTORS;
pEraseInit.Sector = PAGE0_ID;
pEraseInit.NbSectors = 1;
pEraseInit.VoltageRange = VOLTAGE_RANGE;
/* 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(&pEraseInit, &SectorError);
/* 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(&pEraseInit, &SectorError);
/* 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(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(TYPEPROGRAM_HALFWORD, PAGE0_BASE_ADDRESS, VALID_PAGE);
/* If program operation was failed, a Flash error code is returned */
if (FlashStatus != HAL_OK)
{
return FlashStatus;
}
pEraseInit.Sector = PAGE1_ID;
pEraseInit.NbSectors = 1;
pEraseInit.VoltageRange = VOLTAGE_RANGE;
/* Erase Page1 */
if(!EE_VerifyPageFullyErased(PAGE1_BASE_ADDRESS))
{
FlashStatus = HAL_FLASHEx_Erase(&pEraseInit, &SectorError);
/* 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 */
{
pEraseInit.Sector = PAGE1_ID;
pEraseInit.NbSectors = 1;
pEraseInit.VoltageRange = VOLTAGE_RANGE;
/* Erase Page1 */
if(!EE_VerifyPageFullyErased(PAGE1_BASE_ADDRESS))
{
FlashStatus = HAL_FLASHEx_Erase(&pEraseInit, &SectorError);
/* 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(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 */
{
pEraseInit.Sector = PAGE1_ID;
pEraseInit.NbSectors = 1;
pEraseInit.VoltageRange = VOLTAGE_RANGE;
/* Erase Page1 */
if(!EE_VerifyPageFullyErased(PAGE1_BASE_ADDRESS))
{
FlashStatus = HAL_FLASHEx_Erase(&pEraseInit, &SectorError);
/* 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(TYPEPROGRAM_HALFWORD, PAGE1_BASE_ADDRESS, VALID_PAGE);
/* If program operation was failed, a Flash error code is returned */
if (FlashStatus != HAL_OK)
{
return FlashStatus;
}
pEraseInit.Sector = PAGE0_ID;
pEraseInit.NbSectors = 1;
pEraseInit.VoltageRange = VOLTAGE_RANGE;
/* Erase Page0 */
if(!EE_VerifyPageFullyErased(PAGE0_BASE_ADDRESS))
{
FlashStatus = HAL_FLASHEx_Erase(&pEraseInit, &SectorError);
/* 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 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;
uint16_t OldPageId=0;
uint16_t ValidPage = PAGE0, VarIdx = 0;
uint16_t EepromStatus = 0, ReadStatus = 0;
uint32_t SectorError = 0;
FLASH_EraseInitTypeDef pEraseInit;
/* 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(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;
}
}
}
}
pEraseInit.TypeErase = TYPEERASE_SECTORS;
pEraseInit.Sector = OldPageId;
pEraseInit.NbSectors = 1;
pEraseInit.VoltageRange = VOLTAGE_RANGE;
/* Erase the old Page: Set old Page status to ERASED status */
FlashStatus = HAL_FLASHEx_Erase(&pEraseInit, &SectorError);
/* 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(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;
}
/**
* @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) {
/* Unlock the Flash Program Erase controller */
FLASH_Unlock();
/* We use a uint16_t counter here because that is the width of the address field, thus that many are supported. */
for (uint16_t i = 0; i < NUM_EEPROM_ADDRESSES; ++i) {
EEPROM_ADDRESSES[i] = i; /* We will always do them sequentially */
}
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, FLASH_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, FLASH_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 < NUM_EEPROM_ADDRESSES ; VarIdx++) {
if ((*(__IO uint16_t*) (PAGE0_BASE_ADDRESS + 6)) == EEPROM_ADDRESSES[VarIdx]) {
x = VarIdx;
}
if (VarIdx != x) {
/* Read the last variables' updates */
ReadStatus = EE_ReadVariable(EEPROM_ADDRESSES[VarIdx], &DataVar);
/* In case variable corresponding to the virtual address was found */
if (ReadStatus != 0x1) {
/* Transfer the variable to the Page0 */
EepromStatus = EE_VerifyPageFullWriteVariable(EEPROM_ADDRESSES[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, FLASH_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, FLASH_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, FLASH_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 < NUM_EEPROM_ADDRESSES ; VarIdx++) {
if ((*(__IO uint16_t*) (PAGE1_BASE_ADDRESS + 6)) == EEPROM_ADDRESSES[VarIdx]) {
x = VarIdx;
}
if (VarIdx != x) {
/* Read the last variables' updates */
ReadStatus = EE_ReadVariable(EEPROM_ADDRESSES[VarIdx], &DataVar);
/* In case variable corresponding to the virtual address was found */
if (ReadStatus != 0x1) {
/* Transfer the variable to the Page1 */
EepromStatus = EE_VerifyPageFullWriteVariable(EEPROM_ADDRESSES[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, FLASH_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;
}
/* Lock the Flash Program Erase controller */
//FLASH_Lock();
return FLASH_COMPLETE;
}
/**
* @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 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;
}