Alternative Controller for HHKB Pro
===================================
I wanted to add some features like vi cursor and mouse keys to my [HHKB][HHKB] but its controller is not programmable and firmware source code is not open, of course. This means customizing this keyboard needs to replace original controller with programmable one.

This controller can work with HHKB **Professional**, **Professional 2**, **JP** and **Type-S**.

See [this thread][AltController] in geekhack.org for details.

[HHKB]: http://www.pfu.fujitsu.com/hhkeyboard/
[AltController]: http://geekhack.org/index.php?topic=12047.0


## Update
* Bluetooth module RN-42 is supported.(2015/01)


## Features
* Customizable keymap
* More keymap layers(more Fn keys)
* Mouse keys
* USB NKRO
* Bluetooth(RN-42)

See README of [tmk_keyboard] for more.

[tmk_keyboard]: http://github.com/tmk/tmk_keyboard

### Pros
* No risks: Everything is all reversible
* No need for PCB trace patching, case cutting or any other destructive mod
* Can keep original controller intact
* Can change all HHKB behavior as you like

### Cons
* Void your warranty
* Lose USB hub function of Pro2

## DISCLAIMER
I'm not a professional of electronics nor MCU programming. This may damage your HHKB.
And my English writing is poor, I'm not sure I can convey my notions accurately.

## Quick-start guide for the pre-assembled hhkb controller
1. Build a custom keyboard layout using the online tool
   * Use Chrome if the site does not behave as expected
   * Make sure to generate the file using the right template
      *  English
         * [hhkb with blue-tooth](http://www.tmk-kbd.com/tmk_keyboard/editor/unimap/?hhkb_rn42)
         * [hhkb with USB-only](http://www.tmk-kbd.com/tmk_keyboard/editor/unimap/?hhkb)

      *  JP
         * [hhkb with blue-tooth](http://www.tmk-kbd.com/tmk_keyboard/editor/unimap/?hhkb_jp_rn42)
         * [hhkb with USB-only](http://www.tmk-kbd.com/tmk_keyboard/editor/unimap/?hhkb_jp)

1. Save the `.hex` file to your computer; note this is all you need to generate
   a custom layout with most of the available features (including mouse control)
    *  Check-out [the last third of this video](https://www.youtube.com/watch?v=TYmAb8zOPWU&t=561s)
       to get an idea of how to build your own layout; it includes how to load to the firmware using FLIP<P>


1. Download and install the `dfu-programmer` (the alternative to FLIP), open-source available
   for Windows, Linux, and Mac OS.  e.g., for Mac OS: `brew install dfu-programmer` <P>
   _Note: This bootloader is all that is required to load/flash the firmware created
   using the online tool. You do not need the full `avr-gcc` development stack
   because you created the required `.hex` file using the online tool instead._

1. Please read and understand this next step in full before running the
   following concatenated sequence of commands <P>
   ```
   $ sleep 20 && dfu-programmer atmega32u4 erase --force && dfu-programmer atmega32u4 flash <your_downloaded_file>.hex  && dfu-programmer atmega32u4 reset
   ```
   * Run this command from the directory where you saved your `.hex` file
   * `sleep 20` gives you time to switch your controller to a programmable mode
     by hitting the red button located on your controller
   * Once in this mode, you will no longer have access to your keyboard; that's
     ok because the rest of the commands are concatenated together to run without
     needing further input from the keyboard
   * Once you switch the controller to the programmable state (by hitting the
     red button), the `dfu-programmer` will automatically detect your controller (`man
     dfu-controller` for details)
   * `&& dfu-programmer...` are the concatenated commands that clear
     the old, load the new and restart your controller with the new firmware.
     These commands execute automatically once the ~ 20 seconds have passed.

   * While this is not expected, in the event the bootloader fails to load
     your `.hex` file, disconnect and reconnect your keyboard's USB to
     re-establish the normal mode of operation required to troubleshoot.

   * In the event of an issue, please submit an issue on github to help us
     improve the documentation.



## HHKB Internals
See [doc/HHKB.txt](doc/HHKB.txt) and files under [doc/](doc/) for internal of HHKB and this controller.


## Build Firmware & Program
See [this document](../../tmk_core/doc/build.md) and [this](https://github.com/tmk/tmk_keyboard/wiki#build-firmware) first.

### Configuration
Build options and firmware settings are available in `Makefile` and `config.h` or `config_rn42.h`.


### Keymap
To define your own keymap create file named `keymap_<name>.c` and see [keymap document](../../tmk_core/doc/keymap.md) and existent keymap files.


### Build
Several version of keymap are available in advance but you are recommended to define your favorite layout yourself. Just `make` with `KEYMAP` option like:

    $ make -f Makefile.<variant> KEYMAP=<name> clean
    $ make -f Makefile.<variant> KEYMAP=<name>

`Makefile` can be used for **Pro2 and Pro** USB controller, `Makefile.jp` for **JP**, `Makefile.rn42` for **Pro2** Bluetooth and `Makefile.rn42.jp` for **JP** Bluetooth.


### Program
First, push reset button on board to start bootloader.

This command programs the controller with [dfu-programmer] if the tool is installed and configured properly.

    $ make -f Makefile.<variant> KEYMAP=<name> dfu

Or you can also use [FLIP] command to program. Also the tool should be installed and configured properly. FLIP GUI application is also available.

    $ make -f Makefile.<variant> KEYMAP=<name> flip



## Hardware

### TMK Alt Controller Board
Preassmbled controller is available from [here](https://geekhack.org/index.php?topic=71517.0).

You can find design files of the controller at [Keyboard Controller Board for HHKB(KiCad project)](https://github.com/tmk/HHKB_controller).


[dfu-programmer]: http://dfu-programmer.sourceforge.net/
[FLIP]: http://www.atmel.com/tools/FLIP.aspx