Flash writing is not working

[TaronKim]

Hello, Flash writing is not working.

When i update firmware, then Writing is working well only one time.

But after this time, result is fail in HAL_FLASH_PROGRAM() 

 

MCU : STM32F446RCT7

 

 

Thanks.

[Sarra.S]

Hello @TaronKim, 

Check STM32CubeF4/Projects/STM32446E_EVAL/Examples/FLASH/FLASH_WriteProtection at master · STMicroelectronics/STM32CubeF4 (github.com)

[Tesla DeLorean]

Please use the code pasting tool </>  and not bitmapped screen shots.

Working once suggest you fail to erase the blocks on the second go around.

You don't show enough code to fully convey the context. 

[Shirley.Ye]

hello,

Before you program the flash, you need to erase it first.

[TaronKim]

Oh i see.

Then for example, when i use 0x0801FFF0 address for flag, how can i erase only 0x0801FF0 address?

Do you have any solution?