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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
- controller with programmable one. For this purpose I used PJRC [Teensy++][Teensy] as alternative controller.
-
- [HHKB]: http://www.pfu.fujitsu.com/hhkeyboard/
- [Teensy]: http://www.pjrc.com/teensy/
-
-
- My keyboard firmware source tree is here: http://github.com/tmk/tmk_keyboard
- See directory keyboard/hhkb to build firmware for HHKB.
-
-
- ##Features
- * Customizable keymap
- * More keymap layers(more Fn keys)
- * Mouse keys
- * USB NKRO
-
- ###Pros
- * Without PCB trace cutting, case mod or any destructives
- * Can keep original controller intact
- * Can change all HHKB behaviour as you like
-
- ###Cons
- * Void your warranty
- * Lose USB hub function in case of Pro2
-
- ##DISCLAIMER
- I'm not a professional of electronics or MCU programming. This may damage your HHKB.
- And my English writing is poor, I'm not sure I can convey my notions accurately.
-
-
-
-
-
-
- ##Build Firmware
- You can choose some combination of MCU and USB protocol stack.
-
- ### Teensy++(AVR USB family) with [LUFA]
- 0. Edit **matrix.c** to use your pin configuration. See doc/HHKB.txt for detail.
-
- 1. Edit **keymap.c** to use your favoirte keymap.
-
- 2. Edit **Makefile** if you want to use other `MCU` than Teensy++ 2.0.
-
- 3. Build firmware binary file:
- `$ make -f Makefile.lufa`
-
- 4. Program MCU with PJRC [Teensy Loader] tool. If you install command line version of the loader just run:
- `$ make -f Makefile.lufa teensy`
-
- [LUFA]: http://www.fourwalledcubicle.com/LUFA.php
- [Teensy Loader]: http://www.pjrc.com/teensy/loader.html
-
-
- ###AVR Mega with [V-USB]
- Follow below if you want to use AVR with V-USB as .
-
- 0. Edit **matrix.c** to use your pin configuration. See doc/HHKB.txt for detail.
-
- 1. Edit **keymap.c** to use your favoirte keymap.
-
- 2. Edit **usbconfig.h** to configure V-USB options.
-
- 3. Edit **Makefile.vusb** to define `MCU` and `F_CPU`.
-
- 4. Build firmware binary file:
- `$ make -f Makefile.vusb`
-
- 5. Program MCU with AVR programmer like AVRISPmkII. If you already have [USBaspLoader] on MCU just run:
- `$ make -f Makefile.vusb program`
-
- [V-USB]: http://www.obdev.at/products/vusb/index.html
- [USBaspLoader]: http://www.obdev.at/products/vusb/usbasploader.html
-
-
- ###How to Customize Keymap
- Later...
- See **keymap.c**.
-
-
- ##Hardware
-
- ###Teensy++ installation
- Angled USB mini B adapter is used to install Teensy++ laterally.
-
- ![Image of Teensy install](hhkb/doc/HHKB_img/teensy_install.jpg)
-
- Bread baord wires are used to connect Teensy++.
-
- ![Image of Teensy wiring](hhkb/doc/HHKB_img/teensy_wiring.jpg)
-
- ![Image of Connector](hhkb/doc/HHKB_img/connector_contact.jpg)
-
-
- ###PJRC Teensy++ 2.0 connection
- +---------------+
- | Teensy++ |
- | |
- | | HHKB
- | | ~~~~
- | PB0-2|------->ROW(6-8)
- | PB3-5|------->COL(9-11)
- | PB6|------->ENABLE(12)
- | PE6|<-------KEY(4)
- | PE7|------->PREV(5)
- | |
- | |
- | |
- +---------------+
-
-
- ###V-USB circuit
- +---+ +---------------+
- USB GND | | ATmega168 |
- ~~~ C3 | |
- 5V <-------+--------+---|Vcc,AVCC | HHKB
- R1 | | ~~~~
- D- <----+--+-----R2-----|INT1 PB2-4|------->ROW(6-8)
- D+ <----|---+----R3-----|INT0 PC0-2|------->COL(9-11)
- Z1 Z2 | PC3|------->ENABLE(12)
- GND<----+---+-----------|GND PB0|<-------KEY(4)
- | PB1|------->PREV(5)
- | |
- 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
- X1: Crystal 20MHz(16MHz/12MHz)
- SW: Push Switch(Optional for bootloader)
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