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MPC5748G hsm enabled, board in reset loop

Question asked by Krzysztof Mazur on Jun 15, 2018
Latest reply on Jun 20, 2018 by Krzysztof Mazur

Hey guys,

I managed to enable the HSM but now the board is stuck in a reset loop and after 2 resets S32 asks for jtagpassword, which i dont know.

I didnt do anything fancy, I unlocked the utest area and wrote the DCF record(using some of the code from program and erase example). The utest area is now locked again.

The issue is that i would like to get the board back up and running since i dont know what went wrong. I managed to get my hands on a spare Lauterbach and from what i can see everything is fine, the utest area is locked, DCF is written, HSE and HSB both = 1.

Update1: I stepped the board using lauterbach and it turns out it fails when it gets to BAF area, specifically at 0x004057C6

Update2: the part at which it fails is the destructive reset register.

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