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mengqiu
Level 1
Level 1
5 sign-ins First reply posted First question asked

The Aurix MCU (tc377) has enabled HSM and JTAG cryptography.

There was a problem with aurix at that time, and the program ran to a certain point to produce an exception and could not start normally.

Therefore, we connect the debug tool with power and set the debug dial 4 to the ON position(disable watchdog).

Try to connect the board using the footsteps of tiger aurix project. After the lauterbach interface appears, the debug port secured is prompted, as shown below

 
mengqiu_1-1703470011328.png

But use the window to enter the password directly(password is ok , bellow is the demo password):

System.option KEYCODE 0x00000001 0x00000002 0x00000003 0x00000004 0x00000005 0x00000006 0x00000007 0x00000008

we can not connect to the MCU.

lauterbach still display: debug port secured.

Then we went to the script to change the password, but still can not connect.

We don't know how to solve this problems.

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4 Replies
Di_W
Moderator
Moderator
Moderator
1000 replies posted 250 solutions authored 100 likes received

Be careful when writing UCBs, especially if you use a password. If you face issues with UCB operations after using a password, it could lead to the chip becoming inoperable (bricked).

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mengqiu
Level 1
Level 1
5 sign-ins First reply posted First question asked

Could you please give some advise on how to find the reason of this debug issue?

Thank you very much.

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Di_W
Moderator
Moderator
Moderator
1000 replies posted 250 solutions authored 100 likes received

Recommend trying a new chip and avoid enabling HSM or UCB password unless it's necessary.

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mengqiu
Level 1
Level 1
5 sign-ins First reply posted First question asked

yes, the HSM and UCB is necessary to enable, this is applied to the production car. 

So, we need some support from Infineon.

Please help us and give us some advise.

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