===============================================================================
                        Option Bytes Programming functions
 ===============================================================================  

   The FLASH_Option Bytes Programming_functions, includes the following functions:

   - void FLASH_ProgramOptionByte(uint16_t Address, uint8_t Data);
   - void FLASH_EraseOptionByte(uint16_t Address);
   - FunctionalState FLASH_GetReadOutProtectionStatus(void);
   - uint16_t FLASH_GetBootSize(void);
   - uint16_t FLASH_GetCodeSize(void);
   
   Any operation of erase or program should follow these steps:
   
   1. Call the FLASH_Unlock(FLASH_MemType_Data); function to enable the Flash 
      option control register access
   
   2. Call the desired function to erase or program data
      - void FLASH_ProgramOptionByte(uint16_t Address, uint8_t Data); => to program
        the option byte Address with the desired Data value.  
      - void FLASH_EraseOptionByte(uint16_t Address); => to erase the option byte
        Address. 			 
   
   3. Once all needed option bytes to be programmed are correctly written, call the
      FLASH_Lock(FLASH_MemType_Data) to disable the memory access ( It is recommended to
      protect the FLASH memory against possible unwanted operation)