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]) {
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; }
uint16_t EE_Init(void) {
uint16_t FlashStatus;
FlashStatus=__EE_Init();
InitCurrWrAddress();
return(FlashStatus); } /**
* @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 = 0x08010000, PageStartAddress = 0x08010000;
/* 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));
Address=CurWrAddress-2;
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