ST STM32F31xx

FLASH Memory (FLASH)
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 Launch the Option Bytes loader
 Erase the Option Bytes
 Set/Reset the write protection
 Set the Read protection Level
 Program the user option Bytes
 Set/Reset the BOOT1 bit
 Enable/Disable the VDDA Analog Monitoring
 Enable/Disable the SRAM parity
 Get the user option bytes
 Get the Write protection
 Get the read protection status
4. FLASH Interrupts and flags management functions: this group includes all needed
functions to:
 Enable/Disable the FLASH interrupt sources.
 Get flags status.
 Clear flags.
 Get FLASH operation status.
 Wait for last FLASH operation.
11.2.2 FLASH Interface configuration functions
This group includes the following functions:
 void FLASH_SetLatency(uint32_t FLASH_Latency);
 void FLASH_HalfCycleAccessCmd(uint32_t FLASH_HalfCycleAccess);
 void FLASH_PrefetchBufferCmd(FunctionalState NewState);
The unlock sequence is not needed for these functions.
 FLASH_SetLatency()
 FLASH_HalfCycleAccessCmd()
 FLASH_PrefetchBufferCmd()
11.2.3 FLASH Memory Programming functions
This group includes the following functions:
 void FLASH_Unlock(void);
 void FLASH_Lock(void);
 FLASH_Status FLASH_ErasePage(uint32_t Page_Address);
 FLASH_Status FLASH_EraseAllPages(void);
 FLASH_Status FLASH_ProgramWord(uint32_t Address, uint32_t Data);
 FLASH_Status FLASH_ProgramHalfWord(uint32_t Address, uint16_t Data);
Any operation of erase or program should follow these steps:
1. Call the FLASH_Unlock() function to enable the FLASH control register program
memory access.
2. Call the desired function to erase page or program data.
3. Call the FLASH_Lock() function to disable the FLASH control register access
(recommended to protect the FLASH memory against possible unwanted operation).
 FLASH_Unlock()
 FLASH_Lock()
 FLASH_ErasePage()