How do I actually set up the debugger to do secure authentication?

[andrewfisher]

I am using a LPC55S28 chip and wish to lock it down so only authenticated debug is possible. chapter 51 of the user guide explains quite a bit about the process but does not go into the specifics of how I actually set up a debug session in say MCUXpresso.

Is there a document explaining this anywhere?

Also its not entirely clear how I generate the credentials to make this work that would be useful information too. Examples showing how to generate keys similar to those in the secure boot section would help.

Thanks

[Alice_Yang · Accepted solution]

Hello andrewfisher,

There is an application describe the steps, you can refer to:

https://www.nxp.com.cn/docs/en/application-note/AN13037.pdf  

https://www.nxp.com/docs/en/application-note-software/AN13037SW.zip 

Please pay attention, in AN, the SPSDK not the latest version, so the files in .zip folder not

suitable, can download newest example files in 

https://github.com/NXPmicro/spsdk/tree/master/examples/dat  

Another attention is do not use this step:

3.2.7 Revert device after programming CMPA 

BR

Alice

[andrewfisher]

Thank you, this is helpful.