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STM32F2xx OTP issue

Question asked by on Apr 2, 2013
Latest reply on May 21, 2013 by jj.sprague
I need to put some data permanent in the OTP. But I phase a few problem durring debbug.
1. When try to program it on power up like in the FLASH I get the error can't program address 0x1FFF7800 as it is not a part of teh FLASH. Can't I put data in the OTP in advance and if not do I have to put it first to the FLASH and then copy it to the OTP?
2. What is the reset value of the OTP Lock block and do I have to open it at the start up (0XFF)?
3. If I put 0x00 one time in the OTP Lock block can I open it later for change the OTP value or it is permanent?