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2401970_en-US
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Hello,
We are developing an application that uses the AB_SWAP mechanism of the HSE firmware on the S32K342 to perform OTA updates. We are currently activating the passive block once the passive region of the flash is entirely written to.
We were wondering whether there is a fallback mechanism that we can use to verify/check whether the image we are booting from is corrupted, and if we can fallback to the 'known good' active region that has become the passive region after resetting.
This arises from the fact that on some occasions, we overwrite the passive region without issuing a reset and midway through we reset the processor, resulting in a corrupted image in the flash.
Hey @lukaszadrapa ,
Thanks for the clarification. We are still trying to understand which type of secure boot strategy to use in our application. Advance Secure boot seems a bit complicated with having to install the SMR and CR.
On the other hand, Basic Secure boot seems slightly easier to install but the exact implementation and installation details seem unclear.
I was wondering if you could provide some insight into these options. I am referring to the HSE B Reference Manual and was also wondering if there is any additional documentation I should be referring to for this.
Regards,
Shiv
Hi @Shiv_peak
I answered very similar question a couple of days ago, please take a look at:
https://community.nxp.com/t5/S32K/S32K-OTA-Rollback/m-p/2400332/highlight/true#M60125
If you need more details, just let me know.
Regards,
Lukas