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STM32H757 dual core debugging issue

MiNe
Visitor

The last couple of months I have been developing on an STM32H757I-EVAL board. Programming and debugging (multi-core) works reasonably well; although sometimes I need to re-power the board.

During the last weeks, we transitioned from the EVAL board to the actual PCB design. Since then I have a lot of issues with debugging of the board.

I use the ST-LINKV2 debugger in combination with STM32CubeIDE 1.18.0.

Most of the times, the ST-LINK GDB server refuses to connect with the following error:

Target connection mode: Under reset

Target connection failed

Target no device found

Error in initializing ST-LINK device.

Reason: No device found on target.

Playing around with the setting shows that the ST-LINK GDB server does not connect when having the '--halt' option specified (to halt both cores). When I omit this flag, the GDB server is able to connect to the target.

I need to re-power the board to get it working again (for a couple of tries, after that it stops again)

Are there any known issues, or do you have any suggestions how I can solve the issue?

2 REPLIES 2
Peter BENSCH
ST Employee

Welcome @MiNe, to the community!

In order to analyse your problem more precisely, it would be useful if you could add photos of your your ST-LINK/V2 here, back and front please.

Regards
/Peter

In order to give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.
MiNe
Visitor

MiNe_0-1751870992576.png

I am getting this error while I am debugging both cores simultaneously.