Build NeuG

$ git clone https://anonscm.debian.org/cgit/gnuk/gnuk/neug.git
$ cd neug/
$ git submodule init
$ git submodule update
$ cd src
$ ./configure –vidpid=234b:0001
$ make

Clone Gnuk (needed for stlinkv2.py)

$ git clone https://anonscm.debian.org/cgit/gnuk/gnuk.git

Connect FST-01 to debugger
Plugging scheme

Flash builded NeuG binary

Replug debugger after each invokation of stlinkv2.py

$ cd gnuk/tools
# python2 stlinkv2.py -u
# python2 stlinkv2.py “path to neug.bin”

STLink/v2 debugger needs fresh firmware to work properly on Linux, AFAIK it can be done only with this Windows-only utility

References