How do I control STM32MP157 Cortex-M4-only reset signal using a Segger J-Link or J-Trace?

[Spamfast]

I've asked Segger but I was wondering if anyone knows how to get a Segger J-Link/Trace to put only the M4 core on an STM32MP157 into reset and bring it back out?

[OlivierK]

Hi,

You should indeed ask Segger directly, It seems J-link SDK, https://www.segger.com/products/debug-probes/j-link/technology/j-link-sdk/

can send reset command from the cmd prompt.

It should works for debug the CortexM4, with the STM32MP157 board set in Engineering boot mode (to connect only to the Cortex M4 through JTAG).

Some related topics also:

https://forum.segger.com/index.php/Thread/7557-ABANDONED-Can-t-connect-to-M4-core-of-STM32MP1-STM32MP157/