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.html
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?