topic Re: OTFAD--bootloader for encrypt image in Kinetis Microcontrollers

OTFAD--bootloader for encrypt image

fredfu — Mon, 04 Jul 2016 02:56:10 GMT

Hi ,

Now I have a problem of
NXP_KINETIS_BOOTLOADER_2_0_0, I want to use encrypt image according to Kinetis
Bootloader QuadSPI User's Guide.pdf. When I send program_keys.sb to target,
data can’t be programmed completely, same issue happen in qspi_image_encrypt_0000.sb.
I try to read those keys in IFR, I can read index 0x30/0x31/0x32/0x33, but
can’t get data in index 0x20/0x21/0x22/0x23. Could you help to check the
problem? Thanks.

Re: OTFAD--bootloader for encrypt image

jeremyzhou — Tue, 05 Jul 2016 02:55:16 GMT

Hi Yanrong Fu,

I was wondering if you can tell what chip you use, then I can replicate the issue on the related board.

I'm looking forward to your reply.
Have a great day,
Ping

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Re: OTFAD--bootloader for encrypt image

fredfu — Wed, 06 Jul 2016 04:21:48 GMT

Hi Ping,

I used K81 and tested in TWR-K80F150M. Thanks.

Best Regards,

Fred Fu

Re: OTFAD--bootloader for encrypt image

jay_heng — Wed, 06 Jul 2016 09:23:23 GMT

The status kStatus_FlashAccessError means that "An invalid record index is supplied", you can check the K81 RM to see the valid record index (Table 34-19. Read Once Command FCCOB Requirements)

Re: OTFAD--bootloader for encrypt image

cutworth — Wed, 06 Jul 2016 09:45:41 GMT

Hi Fred,

The first flash access error you see when you try to send program_keys.sb file to K81 is mostly related to you are trying to program the program once field a second time.

You can see the error coding for program once command.

And for why you will can read back 0x30-0x33 program once field and not 0x20-0x23 program once field. Here is description from K81 RM.

The Program Once Field in the program flash erasable IFR with indexes 0x20 - 0x23 provides 16 bytes of user data storage that can be programmed using the Program Once command but cannot be read using the Read Once command. The Program Once Field in the program flash erasable IFR with indexes 0x30 - 0x33 provides 16 bytes of user data storage that can be programmed using the Program Once command and read using the Read Once command.

So what you see is normal.

Hao