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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


Openocd does not work as expected

I have 2 errors when starting the debuger with the following messages:
1) Unplugged target or STLink already in use or STLink USB driver not installed
Open On-Chip Debugger 0.10.0-dev-00005-g4030e1c-dirty (2017-10-25-10:55)
Licensed under GNU GPL v2
For bug reports, read
http://openocd.org/doc/doxygen/bugs.htmlQuestion
srst_only separate srst_nogate srst_open_drain connect_assert_srst
Info : The selected transport took over low-level target control. The results might differ compared to plain JTAG/SWD
adapter_nsrst_delay: 100
adapter speed: 1800 kHz
Info : tcl server disabled
Info : telnet server disabled
Info : clock speed 1800 kHz
Error: libusb_open() failed with LIBUSB_ERROR_ACCESS
Error: open failed (no matching adapter found)
in procedure ‘init’
in procedure ‘ocd_bouncer’
2) Error message from debugger back end:
Remote communication error. Target disconnected.: No error.
Remote communication error. Target disconnected.: No error.
I have a Windows 10 and a STM32F4-Diskovery with a MB997B board. I see ST-Link in the device manager. But I do not see my board under the disk devices. The ST-Link Utility correctly performs programming and reading of the programmable memory of the board.
What should I do?