How to figure out the boot failure for secure boot

[cp1]

I'm having some problems with setting up secure boot.  I've configured the CFPA and CMPA pages and programmed a signed image, but the chip becomes bricked afterwords.  Also the bootrom is no longer accessible.

I saw that there is a setting in the CMPA page for "Boot failure pin" that lets you pick GPIO pin that will toggle at some rate to indicate the boot error.  However, I cannot find any information that maps the toggle rate to an error.

Is this boot failure pin usable?  What are the error codes that the toggle rates map to?

Thanks!

Conor

[Sabina_Bruce]

Hello Conor,

Hope you are doing well.

I apologize for the delayed response, I've been discussing this with our team as you mention it is not quite clear with the statement provided in the reference manual. However, the bootloader provides an active notification pin known as the nIRQ pin, it can be enabled by the SetProperty command.

Please refer to the blhost user guide on using the SetProperty Command.

Best Regards,

Sabina

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[cp1]

Hi Sabina,

I understand this and believe I have this part working, but my problem is I haven't been able to find documentation that shows what the errors are.  So I can see error codes from the pin, but what would those error codes mean?

Thanks,

Conor

[Sabina_Bruce]

Hi Conor, 

I've received an update from our team. 

The Boot Failure indication pin can be set in CMPA area,  see below table.

 

Once set the Boot failure pin in CMPA area, the pin will hold to low when boot-up successful, if ROM boot failed and chip locked then the Boot failure pin will be hold to high. (Not toggle!)

Best Regards,

Sabina

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Note: If this post answers your question, please click the Correct Answer button. Thank you!

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[Sabina_Bruce]

Hi Conor, 

Thank you for clarifying, I will check with our team regarding the error codes you are seeing. 

Are you seeing these through an oscilloscope? If so, could you please share waveform so that I may share it with the team.

Best Regards,

Sabina