CC2340R5: How to generate a new security key in the OAD

js Tan

Part Number: CC2340R5

I verified the OAD functionality based on the "basic_ble_oad_onchip" routine and now I want to change the default raw key, how can I do that? I found this link for how the CC26XX series generates and handles keys, but the CC2340 is different.

over 1 year ago

+1 Clément over 1 year ago

TI__Guru** 100690 points

Hi,

Thank you for reaching out.

The CC2340Rx series use MCUBoot as boot loader. imgtool is responsible for adding the MCUBoot image header, managing keys and sign the image.

imgtool is executed as post-build step (see https://software-dl.ti.com/simplelink/esd/simplelink_lowpower_f3_sdk/7.20.01.10/exports/docs/ble5stack/ble_user_guide/html/oad-mcuboot/imgtool.html).

You can generate a keypair for the image using the following imgtool command:

./scripts/imgtool.py keygen -k filename.pem -t ecdsa-p256

More details on imgtool is available imgtool documentation page.

I hope this will help,

Best regards,

0 js Tan over 1 year ago in reply to Clément

Intellectual 330 points

Thanks for the reply, it helps a lot!

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CC2340R5: How to generate a new security key in the OAD