Set FLASH level protection from Level 1 to Level 0

ecatala · ‎2013-11-06

Posted on November 06, 2013 at 12:23

I am programming the STM32F051x6 micro with the IAR Embedded Workbench IDE and the ST-LINK.

I erased the Flash option bytes and now I can not load my application code into the micro with the ST-LINK because the Flash is in Level1 (read protection).

The manual said that in order to go back to Level0 (no protection) I have to change the RDP value to 0xAA and that I have to do that executing in user mode.

How can I execute in user mode? Or how can I set the RDP value to 0xAA?

Thanks in advance

Amel NASRI · ‎2013-11-06

Posted on November 06, 2013 at 12:38

You can use the

http://www.st.com/web/en/catalog/tools/PF258168

to update protection level and option bytes.

-Mayla-

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ecatala · ‎2013-11-06

Posted on November 06, 2013 at 13:20

Thanks. It worked!

What I wanted to do initially was to program the 2 user bytes (located in the option byes Flash) to store some data. Do you know how Can I progrma these 2 bytes mantaining the level protection to 0? Or is it better I use a standard flash sector to program 2 bytes to store data?