i.MX RT Crossover MCUsのトピックRe: BEE example problem

BEE example problem

e_v_spronsen — Mon, 10 May 2021 11:00:54 GMT

Hi,

I want to configure a region in flash for BEE AES decryption with a software key.

To get started I installed the bee SDK example and changed the memory region:

#define FLEXSPI_START_ADDR 0x70080000.

The example works without any problem. Only When I try to read any memory value in the range configured of bee decryption. I got the following error message:

15: Target error from Read Memory
15: Target error from Read Memory
Debug port inaccessible after access at location 0x70080000
Debug port inaccessible after access at location 0x700800EC
Debugging context: evkmimxrt1064_bee LinkServer Debug

Everything is halted.

So why can't I read any data from this flash range?

Re: BEE example problem

jeremyzhou — Tue, 11 May 2021 03:30:20 GMT

Hi,
Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.
I was wondering if you can describe the steps of testing since it can help me to figure the problem out.
In further, I'd like to suggest you refer to the application note, it may provide some insights.

Have a great day,
TIC

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Re: BEE example problem

e_v_spronsen — Tue, 11 May 2021 06:16:19 GMT

The problem is the example doesn't work. It generate a hardfault when you try to debug it.

You have to modify the example to get it to work by adding/enabling:

status = BEE_SetRegionKey(BEE, kBEE_Region0, aesKey, AES_KEY_LEN);

The application note and the example doesn't tell you how to use it .

Some heroes don't wear cap:

https://community.nxp.com/t5/i-MX-RT/How-can-I-create-encrypted-data-for-i-MX-RT-1050-s-BEE/m-p/879584/highlight/true#M2410

Maybe NXP should take notes and include this knowledge in the example.