This is one of the common errors users can get when trying to upload code the the parol6 pcb using stlink. If you get error like this:
xPack Open On-Chip Debugger 0.12.0-01004-g9ea7f3d64-dirty (2023-01-30-15:04)
Licensed under GNU GPL v2
For bug reports, read
http://openocd.org/doc/doxygen/bugs.html
debug_level: 1
hla_swd
Error: libusb_open() failed with LIBUSB_ERROR_NOT_SUPPORTED
Error: open failed
in procedure 'program'
OpenOCD init failed
shutdown command invoked
Solution is to install drivers for stlink from this site:
https://www.st.com/en/development-tools/stsw-link009.html
