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STM32F4 flash seems to be locked

Question asked by ahmed.hammad on Jun 13, 2015
Hi,
It seems like I have gotten into a state where I can't erase memory or write to it. I only have i2c access to the bootloader. When I dump the 16 option bytes starting 0x1FFFC000, I get:
0xEF 0xAA 0x10 0x55 0xEF 0xAA 0x10 0x55 0xFF 0xBF 0x00 0x40 0xFF 0xBF 0x00 0x40

I send the write unprotect command and try to do an erase, and nothing happens. I can only send bootloader commands to the stm through i2c. Any suggestions?

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