Answers

• ST-Link/V2 compatible -- Anon from Russia

  "ST-Link/V2 Mini" works fine. It is indeed seems to be 100% compatible with standard ST-Link/V2.

  The total price was under $7 (which includes 4 Dupont cables). See: http://www.aliexpress.com/item/Free-Shipping-1SET-ST-Link-st-link-V2-for-STM8S-STM8L-STM32-Cortex-M0-Cortex-M3/1619197946.html

  Here is a picture:

• ST-Link/V2 compatible

  Diego Marciano kindly shared an article.

  • Compiling and flashing GnuK binaries to the FST-01 using ST-LINK/V2 clone with OPENOCD manually or with the scripts provided in the gnuk repository

    http://blog.nodonogard.net/2015/11/compiling-and-flashing-gnuk-binaries-to.html

• ST-Link/V2 -- gniibe

  I am using ST-Link/V2, as its availability is good.

  Please see SWD connection to FST-01 for pictures of connection.

  Note that I connect USB Hub to feed power from USB Hub to FST-01 (while the examples above feed power from ST-Link/V2 compatible).

  Note that the wire should be short enough to keep good signal.

  You need setting for ST-Link/V2, say, in a file /etc/udev/rules.d/10-stlink.rules (on GNU/Linux):

  ACTION=="add", SUBSYSTEM=="usb", ATTR{idVendor}=="0483", \
  ATTR{idProduct}=="3748", GROUP="tape", MODE="664", SYMLINK+="stlink"
  

  Then, you can unprotect flash ROM of FST-01 by:

  $ ./tool/stlinkv2.py -u
  

  and let the board power off and power on (this is needed procedure for unprotection).

  After that, you can program by:

  $ ./tool/stlinkv2.py <BINARY>.bin
  

  and again power off and power on (this is needed for protection).

  The tool is available within the Gnuk source code distribution under the directory tool/.