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SW4STM32 and SW4Linux fully supports the STM32MP1 asymmetric multicore Cortex/A7+M4 MPUs

   With System Workbench for Linux, Embedded Linux on the STM32MP1 family of MPUs from ST was never as simple to build and maintain, even for newcomers in the Linux world. And, if you install System Workbench for Linux in System Workbench for STM32 you can seamlessly develop and debug asymmetric applications running partly on Linux, partly on the Cortex-M4.
You can get more information from the ac6-tools website and download (registration required) various documents highlighting:

System Workbench for STM32


Error: jtag status contains invalid mode value - communication failure

Glad to know it is working.

Maybe you can change the cap, it was not the good value or a deffective one.

Not really posible to reduce reset, the software assert Reset pin low and then do some things (like enter in SWD mode) and then release Reset so we can’t adjust timings...

You’re the first to have such issue on the forum.
So, either the cap is wrong or you can remove (shunt) the resistor to reduce RC ?
Or reduce R value (22 or 33 ohm) ?