qmk-dactyl-manuform-a/keyboard/hhkb/README.md

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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
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controller with programmable one. This controller can work with HHKB Professional and Professional 2 model.
See [this thread][AltController] in geekhack.org.
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[HHKB]: http://www.pfu.fujitsu.com/hhkeyboard/
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[AltController]: http://geekhack.org/index.php?topic=12047.0
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##Features
* Customizable keymap
* More keymap layers(more Fn keys)
* Mouse keys
* USB NKRO
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See README of [tmk_keyboard] for more.
[tmk_keyboard]: http://github.com/tmk/tmk_keyboard
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###Pros
* No risks: Everything is all reversible
* No need for PCB trace patching, case cutting or any other destructive mod
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* Can keep original controller intact
* Can change all HHKB behaviour as you like
###Cons
* Void your warranty
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* Lose USB hub function of Pro2
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##DISCLAIMER
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I'm not a professional of electronics nor MCU programming. This may damage your HHKB.
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And my English writing is poor, I'm not sure I can convey my notions accurately.
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##Documents
See [doc/HHKB.txt](doc/HHKB.txt) and files under [doc/](doc/) for internal of HHKB and this controller.
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##Build Firmware & Program
See [this document](../../doc/build.md) first.
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### Configuration
Set `MCU`, `BOOTLOADER_SIZE` and other build options in `Makefile` and `config.h`.
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### Build
Just run make after intall tools.
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$ make
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Use `Makefile.pjrc` if you want to use PJRC stack instead of LUFA.(LUFA is recommended.)
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$ make -f Makefile.pjrc
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Use `Makefile.vusb` for [V-USB] controller.(not supported actively any more.)
$ make -f Makefile.vusb
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### Program
First, push reset button on board to start bootloader.
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This command programs the controller with [dfu-programmer] if the tool is intalled and configured properly.
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$ make dfu
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Or you can also use [FLIP] command to program. Also the tool should be intalled and configured properly. FLIP GUI app is also available.
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$ make flip
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Use [Teensy Loader] if your controller is Teensy/Teensy++.
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##How to Customize
See [tmk_keyboard] documents.
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##Hardware
You have some options for hardware. Development boards with USB AVR family(ATMega32U4, AT90USB1286) like Teensy will work while MegaAVR with [V-USB] library is also cheapear option for DIY.
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###1. TMK Alt Controller Board
TMK designed [Keyboard Controller Board for HHKB Pro2(KiCad project)](https://github.com/tmk/HHKB_controller).
See [this post](http://geekhack.org/index.php?topic=12047.msg948923#msg948923).
###2. PJRC Teensy++ 2.0 connection
+---------------+
| Teensy++ |
| |
| | HHKB pro HHKB pro2
| | ~~~~~~~~ ~~~~~~~~~
| PB0-2|------->ROW (6-8) (5-7)
| PB3-5|------->COL (9-11) (8-10)
| PB6|------->ENABLE (12) (11)
| PE6|<-------KEY (4) (3)
| PE7|------->PREV (5) (4)
| |
| | 5V--- (1-3) (1-2)
| | GND--- (13-14) (12-13)
+---------------+
- NOTE: PJRC [Teensy](http://www.pjrc.com/teensy/)
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###3. V-USB connection
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+---+ +---------------+
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USB GND | | ATmega328p |
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~~~ C3 | |
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5V <-------+--------+---|Vcc,AVCC | HHKB pro pro2
R1 | | ~~~~~~~~ ~~~~
D- <----+--+-----R2-----|INT1 PB2-4|------->ROW (6-8) (5-7)
D+ <----|---+----R3-----|INT0 PC0-2|------->COL (9-11) (8-10)
Z1 Z2 | PC3|------->ENABLE (12) (11)
GND<----+---+-----------|GND PB0|<-------KEY (4) (3)
| PB1|------->PREV (5) (4)
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| |
GND+-C2--+--|XTAL1 RXD|------->Debug Console
X1 | TXD|<-------Debug Console
GND+-C3--+--|XTAL2 RST|---SW--+GND
+---------------+
R1: 1.5K Ohm
R2,R3: 68 Ohm
Z1,Z2: Zener 3.6V
C1,C2: 22pF
C3: 0.1uF
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X1: Crystal 12MHz
SW: Push Switch(for bootloader)
- NOTE: See [V-USB] documentation for more detail of hardware and the USB stack.
- NOTE: [USBaspLoader] is very useful for firmware update.
[LUFA]: http://www.fourwalledcubicle.com/LUFA.php
[PJRC]: http://www.pjrc.com/teensy/usb_keyboard.html
[dfu-programmer]: http://dfu-programmer.sourceforge.net/
[FLIP]: http://www.atmel.com/tools/FLIP.aspx
[Teensy Loader]: http://www.pjrc.com/teensy/loader.html
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[V-USB]: http://www.obdev.at/products/vusb/index.html
[USBaspLoader]: http://www.obdev.at/products/vusb/usbasploader.html