Flash writing is not working

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.

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ST Employee

Hello @TaronKim,

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Guru

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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ST Employee

hello,

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

Associate II

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?

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