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STM32F4 FLASH One-Time programmable (OTP)

Question asked by tan loi on Nov 12, 2017
Latest reply on Nov 13, 2017 by tan loi

I make a simple project to write and read data from FLASH OTP. I checked states of 16 blocks in OTP , have 3 block is block (state 0x00) and i write to other block with state 0xff. But i just correct only 1 times, and i try to change some data to write and read it back again, it's wrong data. Please help me to dead with this problem , and how i can "unblock" 3 block are blocked with st-utility 5.1.