Flying Stone Technology (FST) has started the development of a new firmware, called "Initial G".
In November 2011, FST released the design of FST-01 (Flying Stone Tiny Zero-One). Then, FST manufactured and started selling of FST-01 in October 2012.
The first lot of FST-01 comes with Gnuk version 1.0.1. Because FST-01 is designed for Gnuk, this is natural choice for Flying Stone Technology.
However, it found that Gnuk Token is so perfect as an application, people tend to _not_ enjoy FST-01 itself much.
Thus, Flying Stone Technology were seeking a firmware suitable for USB MCU.
The answer is "Initial G", a minimum controlling program for USB MCU.
Gniibe expected people enjoy computing on MCU with FST-01. But it found that there are obstacles and difficultie around such computing and developement.
Some people have skill for GNU toolchain for cross development, but using JTAG/SWD dongle is relatively difficult even for professionals, because of many reason (cost of hardware, proprietary hardware, proprietary middileware, maturity of implementation, etc.). Even if a part of problem could be solved, such as FTDI2232D Module can be JTAG dongle, it requires some electronics skill and knowledge.
Current best practice would be a kind of DFU (Device Firmware Upgrade) firmware. In the other day, Gniibe addressed DFU (Device Firmware Upgrade) consideration.
Features of Initial G
Initial G will implement vendor specific command set, named "CTRL-G".
- CTRL-G protocol: Vendor specific command sets for endpoint zero.
- SRAM Memory access: read/write
- Register access: read/write
- MCU control: start/stop
- Flash ROM access: read/write
Host applications with Initial G
- Unittest framework for target MCU
- GDB server for target board