CC2640R2F: IMAGE_VALID_CONF (and resetVectorAddress) has to be multiple of 0x80

Hello Xinyang,

Thanks for reaching out. We will look into your question and get back to you as soon as possible.

BR,

David.

Hello,

Thank you for reaching out! How are you flashing the device? Could you also provide the SDK version you are using?

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Best Regards,

Tarek

Hi Tarek,

I am flashing the device using "Run - Flash Project" button in Code Composer Studio. The versions of toolchain I am using are as follow

CCS 20.1.0

CC2640R2 SDK 5.30.01.11

TI CGT ARM 20.2.7.LTS

Hello,

Thank you for providing that! Upon looking into this, I found that the IMAGE_VALID_CONF register must have a value of 0x00000000 in order for enabling the boot sequence to transfer control to a flash image. I've attached a screenshot of the section in the Technical reference manual that confirms this. I also provided a link to the manual.

I hope this helps!

Best Regards,

Tarek

Hi Tarek,

Thank you for your reply.

In the screenshot you attached, it also says "For CC2640R2: This field must have the address value of the start of the flash vector table in order for enabling the boot sequence to transfer control to a flash image." You can refer to the secure_fw example under blestack.

To make a few things clearer,

1. The IsAppImageValid() function I mentioned above is part of the boot code provided by TI in ROM.

2. The original question I linked mentioned that IMAGE_VALID_CONF needs to be a multiple of 0x100 for the device to boot into the application image, which validates my finding because 0x100 = 2 * 0x80. TI did not give an answer to that question. I am basically bringing up this question again hoping to get an answer from TI's engineer.

Hello,

I apologize for the misunderstanding! Yes, you are indeed correct, the IMAGE_VALID_CONF should be a multiple of 0x80. Here's also another E2E thread that validates your findings: https://e2e.ti.com/support/wireless-connectivity/bluetooth-group/bluetooth/f/bluetooth-forum/804533/cc2640r2f-follow-up-of-cc2640r2f-shall-the-image_valid_conf-value-be-used-to-start-an-application-at-an-address-different-from-0x0

I believe this is simply for alignment.

Best Regards,

Tarek

Hi Tarek.

The E2E thread you linked is the same one that I linked above. 

Original question:

CC2640R2F: Follow up of : CC2640R2F: Shall the IMAGE_VALID_CONF value be used to start an application at an address different...

Can you elaborate on what kind of alignment this provides and why? It would also be great if this requirement is documented in the technical reference manual.