FST-01 has SWD port to write flash ROM of MCU.

There had been no good SWD debugger (hardware and software) in the past. Now, ST-Link/V2 is available, and it is not expensive.

While waiting new OpenOCD release which supports ST-Link/V2, I wrote tool/stlikv2.py to write Gnuk …

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It would be good when Gnuk token supports some sort of "firmware upgrade" feature, which doesn't require any additional hardware such like JTAG/SWD debugger.

Then, users will be able to upgrade the Gnuk firmware.

To support firmware upgrade of Gnuk Token, I am considering adding the feature to Gnuk …

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There is an opinion that a device like FST-01 should have DFU which allows users (developers) to update its firmware.

Yes, some boards (STBee and STBee Mini, for example) have DfuSe (DFU with STmicroelectronics' extension) installed, which eases developments. Developers are not required to have JTAG/SWD debuggers but can …

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I am building DIY SWD debugger for my project. As it seems it works somehow, I am writing this document.

It is not fully tested yet, because software is not ready. Just I tested with current version of Tomek Cedro's modification of OpenOCD. It got IDCODE=EE2805D8 successfully.

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