Flash writing is not working

TaronKim · ‎2024-11-03

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 · ‎2024-11-04

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

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Tesla DeLorean · ‎2024-11-04

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.

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Shirley.Ye · ‎2024-11-04

hello,

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

TaronKim · ‎2024-11-04

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?