EEPROM_UpdatePageStatus() 函数的功能是更新上一页的状态。此函数由 EEPROM_Write() 函数调用。首先读取页状态，以确定如何继续。

Bank_Status[0] = *(Bank_Pointer);   // Read Bank Status from Bank Pointer
Page_Status[0] = *(Page_Pointer);   // Read Page Status from Page Pointer

如果此状态表示该页面为空，该函数便会退出，因为此状态会在 EEPROM_Write() 函数中更新。否则，页面状态会更新，以显示页面已满，同时页面指针会递增，为对下一个页面进行编程做好准备：

// Check if Page Status is blank. If so return to EEPROM_WRITE.
if(Page_Status[0] == BLANK_PAGE)
    return;

// Program previous page's status to Used Page
else
{

    // Set Page Status to Used Page
    Page_Status[0] = CURRENT_PAGE;
    Page_Status[1] = CURRENT_PAGE;
    Page_Status[2] = CURRENT_PAGE;
    Page_Status[3] = CURRENT_PAGE;

    // Clears status of previous Flash operation
    ClearFSMStatus();

    Fapi_setupBankSectorEnable(FLASH_WRAPPER_PROGRAM_BASE+FLASH_O_CMDWEPROTA, WE_Protection_A_Mask);
    Fapi_setupBankSectorEnable(FLASH_WRAPPER_PROGRAM_BASE+FLASH_O_CMDWEPROTB, WE_Protection_B_Mask);

    // Program Bank Status to current bank
    oReturnCheck = Fapi_issueProgrammingCommand((uint32*) Page_Pointer+2,
                                                Page_Status, 4, 0, 0,
                                                 Fapi_AutoEccGeneration);

    // Wait for completion and check for any programming errors
    EEPROM_CheckStatus(&oReturnCheck);

    // Increment Page Pointer to next page
    Page_Pointer += EEPROM_PAGE_DATA_SIZE + 8;
}