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CC2340R5: The CC2340 OAD project takes approximately 10 seconds for the first reset to run after flashing

Alex Zhang

Intellectual 1305 points

Part Number: CC2340R5

Hi team：

My customer has the following questions, can I ask you

The CC2340 OAD project takes approximately 10 seconds for the first reset to run after flashing. It takes 2-3 seconds to reset to run. And what's the reason for that

debugging the mcuboot program through the pins reveals that the mcuboot program only runs after the first reset for about 9 seconds, and then it takes 2-3 seconds for the program to verify the firmware

Best regards

Alex

over 2 years ago

0 Alex Fager over 2 years ago

TI__Genius 12601 points

Hello Alex,

I hope you are well. One reason to why OAD takes so long to run is due to the MCUBootloader.

-MCUBoot performs full verification over the images at each boot, which takes time.

The other reasons(s) to why the execution of MCUBoot on CC2340Rx is long is:

-CC2340R5 does not use an ECC hardware accelerator to verify keys in order to ensure that the FW image is safe.

-MCUBoot image verification times may be affected by the image sizes.

In order to reduce the time, you could try to disable debugging mode.

For more information refer to:

Detailed OAD description E2E thread

CC2340R5 OAD Bootloader check

Tips to debug OAD software

Thanks,
Alex F