Does Softdevice Perform an Integrity Check on Startup?

RE: Does Softdevice Perform an Integrity Check on Startup?

koniho — Tue, 23 Apr 2019 12:28:33 GMT

Thank you. I was aware of the application image verification step by the bootloader but wanted to check whether the softdevice did a self-check at start up as well.

RE: Does Softdevice Perform an Integrity Check on Startup?

bjorn-spockeli — Tue, 23 Apr 2019 12:25:45 GMT

Hi Alexander,

the MBR does not perform any integrity check of the SoftDevice and the SoftDevice does not perform any integrity checks on the application startup. As Andy the bootlaoder in our SDK will verify the integrity of the application in bank 0 by calculating the CRC and comparing it with the CRC value stored on the bootloader settings page. The integrity check may be expanded to also verify the integrity of the SD in the same manner.

Best regards

Bjørn

RE: Does Softdevice Perform an Integrity Check on Startup?

Andy — Thu, 18 Apr 2019 07:59:54 GMT

I believe there is mechanism in the bootloader (not softdevice) that performs a CRC check of the contents of bank 0.