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ETB/MTB activation on STM32WB55

Camille Louapre
Associate II

Hello,

I have a question concerning STM32WB55 MCU. We are using it, and use SWD as debug, without advanced debug features (traces).

We are now facing complex bugs, and I would like to activate traces on that MCU for the M4 Core.

We do not have TRACE pins routed, so ETM use is not possible. I have seen that ETB/MTB (Embedded Trace Buffer/Micro Trace Buffer) can be activated. If I understand well, this allows core to trace little amount of instructions execution, in a RAM area, which is dumped by the debugger.

I did not managed to get it work, but it seems that this ETB/MTB is not available for that MCU. Can someone confirm ?

Is there other mean of advanced debugging, to better know execution history before a crash ? Other than classic SWO printf.

Thanks a lot

Camille

1 REPLY 1
Piranha
Chief II