STM32MP15 ECO 5.0 Coresight / CTI pins

[debugging]

PA13 and PA14 seems to support Coresight. Is there more information how this can be used and how to connect these pins  ? currently I use PA13 to connect a LED, for PA14 there is less information.

 

 

[PatrickF]

Hi,

this pins are used for very deep/low-level specific HW debug when you want to synchronize some internal break/trace/watchpoint with external tool (logic analyser, etc...).

No specific SW is provided as this is usually handled manually thru debugger during debug session.
DBTRGI and DBTRGO should be first assigned to GPIOs using AFMux settings.

The debugger should set CTI accordingly (need probably to go thru some advance configuration in the debugger).

I'm not sure CubeIDE offer this capabilities in a straightforward way.

Sometimes, those are named with legacy names DBGRQ and DBGACK, but it is similar usage.

 

Frankly speaking, it is very rare that our customers use those pins which are only relevant for extremely complex debug case when other more classic ways are not sufficient.

Regards.