unsecuring flash memory

[bobmke]

Programming a KE06 part with FRDM board. The FRDM seems to secure flash memory which I use in my application to store config data. How can I unsecure it without all the backdoor password stuff or prevent the FRDM board from securing it?

[jeremyzhou]

Hi,

To provide the fastest possible support I want to point you to a

similar question which has been answered on our NXP community.

Please refer to https://mcuoneclipse.com/2012/10/26/unsecuring-the-kl25z-freedom-board/

to view the details.
Have a great day,
Ping

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[bobmke · Accepted solution]

The link file is already set up to located the config bytes at address 0x0400.

What I was trying to figure out was how to add the code to my software.

I finally figured it out.

Here's what I had to add:

unsigned int flashProtectionField[] __attribute__ ((section(".cfmconfig"))) = {

    0x01020304,

    0x05060708,

    0xffffffff,

    0xffbeffff

};

the first two lines can be anything as they are the passkey code values.

The last line is the most critical as it sets the protection level for flash memory.