topic Unable to program flash configuration field TRK-KEA128 board in Kinetis Microcontrollers

Unable to program flash configuration field TRK-KEA128 board

rajankali — Mon, 04 Sep 2017 03:57:08 GMT

Hi, I am newbie to NXP.

I am trying check how to use back-door key command, but I am unable to program FSEC register via flash configuration field. Following are the steps I am following

1) Flash_Erase_Sector(Sector2); // Erasing sector from address 0x400

2) uint8_t u8keys[8] = {0xAA,0xAA,0xAA,0xAA,0xAA,0xAA,0xAA,0xAA};
uint8_t flash_array[8] = {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xBF,0xFF};

3) Flash_Program(0x400, &u8keys[0], 8); //Programming back-door keys

4) Flash_Program(0x408, &flash_array[0], 8); //Programming rest of flash config field, back-door key access enabled

After reset, FPROT register value: 0xFF, FSEC register value: 0xFE.

Why the FSEC register value is not changing?, how to program flash configuration field?

Re: Unable to program flash configuration field TRK-KEA128 board

kerryzhou — Tue, 05 Sep 2017 03:04:41 GMT

Hi raj ankali,

If you want to configure the backdoor and security region, please do the modification in your project.

backdoor is in flash address 0x400-0x407.

Now take S32DS project as an example, you just need to modify the .s file, the according flash address is OK.

But if you are using the IAR, you need to add "--enable_config_write " in the options, flashloader configuration windows.

Wish it helps you!

If you still have question please let me know!

Have a great day,
Kerry

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