Improve documentation
tmk
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Alternative Controller for HHKB
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===============================
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Feature
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-------
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- Mouse Keys
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- NKRO on USB(PJRC Tennsy only)
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- Keymap Layers
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Customize Keymap
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----------------
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see keymap.c.
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Build
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=====
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PJRC Teensy
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-----------
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0. Edit matrix.c.
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adjust scan code to your pin configuration.(see doc/HHKB.txt for pinouts)
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1. Define macros in config_pjrc.h.(Optional)
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VENDOR_ID, PRODUCT_ID and string descriptor.
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IS_COMMAND
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2. Edit Makefile for MCU setting and build options.
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MCU, F_CPU
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MOUSEKEY_ENABLE, EXTRAKEY_ENABLE, NKRO_ENABLE
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3. Build hex file.
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$ make -f Makefile.pjrc
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4. Program MCU.
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$ make -f Makefile.pjrc program
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V-USB
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-----
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0. Edit matrix.c and usbconfig.h.
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adjust scan code to your pin configuration.(see doc/HHKB.txt for pinouts)
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define macros for V-USB in usbconfig.h.
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1. Define macros in config_vusb.h.(Optional)
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IS_COMMAND
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2. Edit Makefile.vusb for MCU setting and build options.
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MCU, F_CPU
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MOUSEKEY_ENABLE, EXTRAKEY_ENABLE
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3. Build hex file.
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$ make -f Makefile.vusb
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4. Program MCU.
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$ make -f Makefile.vusb program
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Using a bootloader to program for convenience is recommended.
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Once program this V-USB bootloader at first, you can program MCU without
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extra programmer. You should have reset switch to start up as bootloader
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mode in this case.
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USBaspLoader:
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http://www.obdev.at/products/vusb/usbasploader.html
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iWRAP
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-----
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0. Edit matrix.c and usbconfig.h.
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adjust scan code to your pin configuration.(see doc/HHKB.txt for pinouts)
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define macros for V-USB in usbconfig.h.
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1. Define macros in config_iwrap.h.(Optional)
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IS_COMMAND
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2. Edit Makefile.iwrap for MCU setting and build options.
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MCU, F_CPU
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MOUSEKEY_ENABLE, EXTRAKEY_ENABLE
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3. Build hex file.
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$ make -f Makefile.iwrap
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4. Program MCU.
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$ make -f Makefile.iwrap program
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Hardware
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========
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PJRC Teensy
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-----------
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+---------------+
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| Teensy++ |
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| | HHKB
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| | ~~~~
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| PB0-2|------->ROW(6-8)
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| PB3-5|------->COL(9-11)
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| PB6|------->ENABLE(12)
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| PE6|<-------KEY(4)
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| PE7|------->PREV(5)
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+---------------+
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V-USB
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-----
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+---+ +---------------+
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USB GND | | ATmega168 |
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~~~ C3 | |
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5V <-------+--------+---|Vcc,AVCC | HHKB
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R1 | | ~~~~
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D- <----+--+-----R2-----|INT1 PB2-4|------->ROW(6-8)
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D+ <----|---+----R3-----|INT0 PC0-2|------->COL(9-11)
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Z1 Z2 | PC3|------->ENABLE(12)
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GND<----+---+-----------|GND PB0|<-------KEY(4)
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| PB1|------->PREV(5)
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GND+-C2--+--|XTAL1 RXD|------->Debug Console
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X1 | TXD|<-------Debug Console
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GND+-C3--+--|XTAL2 RST|---SW--+GND
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+---------------+
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R1: 1.5K Ohm
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R2,R3: 68 Ohm
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Z1,Z2: Zener 3.6V
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C1,C2: 22pF
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C3: 0.1uF
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X1: Crystal 20MHz(16MHz/12MHz)
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SW: Push Switch(Optional for bootloader)
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iWRAP
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-----
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+---------------+ WT12
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5V | ATmega168 | 5V/3.3V~~~~
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+-----+---|Vcc,AVCC PC4|---/--->iWRAP(RxD)
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USB | C3 | PC5|<--/----iWRAP(TxD)
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~~~ | + | |
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5V <--BATT + GND | | HHKB
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R1 | | ~~~~
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D- <----+-----+--R2-----|INT1 PB2-4|------->ROW(6-8)
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D+ <----|---+----R3-----|INT0 PC0-2|------->COL(9-11)
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Z1 Z2 | PC3|------->ENABLE(12)
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GND<----+---+-----------|GND PB0|<-------KEY(4)
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| PB1|------->PREV(5)
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GND+-C2--+--|XTAL1 RXD|------->Debug Console
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X1 | TXD|<-------Debug Console
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GND+-C3--+--|XTAL2 RST|---SW--+GND
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+---------------+
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R1: 1.5K Ohm
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R2,R3: 68 Ohm
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Z1,Z2: Zener 3.6V
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C1,C2: 22pF
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C3: 0.1uF
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X1: Crystal 12MHz
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SW: Push Switch(Optional)
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BATT: Li-Po Battery, Battery Charger and Voltage Regulator(5V and 3.3V).
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EOF
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@ -0,0 +1,135 @@
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Alternative Controller for HHKB Pro
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===================================
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I wanted to add some features like vi cursor and mouse keys to my [HHKB][HHKB] but its controller is not programmable and
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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. For this purpose I used PJRC [Teensy++][Teensy] as alternative controller.
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[HHKB]: http://www.pfu.fujitsu.com/hhkeyboard/
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[Teensy]: http://www.pjrc.com/teensy/
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My keyboard firmware source tree is here: http://github.com/tmk/tmk_keyboard
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See directory keyboard/hhkb to build firmware for HHKB.
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##Features
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* Customizable keymap
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* More keymap layers(more Fn keys)
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* Mouse keys
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* USB NKRO
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###Pros
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* Without PCB trace cutting, case mod or any destructives
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* Can keep original controller intact
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* Can change all HHKB behaviour as you like
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###Cons
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* Void your warranty
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* Lose USB hub function in case of Pro2
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##DISCLAIMER
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I'm not a professional of electronics or 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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##Build Firmware
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You can choose some combination of MCU and USB protocol stack.
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### Teensy++(AVR USB family) with [LUFA]
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0. Edit **matrix.c** to use your pin configuration. See doc/HHKB.txt for detail.
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1. Edit **keymap.c** to use your favoirte keymap.
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2. Edit **Makefile** if you want to use other `MCU` than Teensy++ 2.0.
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3. Build firmware binary file:
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`$ make -f Makefile.lufa`
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4. Program MCU with PJRC [Teensy Loader] tool. If you install command line version of the loader just run:
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`$ make -f Makefile.lufa teensy`
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[LUFA]: http://www.fourwalledcubicle.com/LUFA.php
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[Teensy Loader]: http://www.pjrc.com/teensy/loader.html
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###AVR Mega with [V-USB]
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Follow below if you want to use AVR with V-USB as .
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0. Edit **matrix.c** to use your pin configuration. See doc/HHKB.txt for detail.
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1. Edit **keymap.c** to use your favoirte keymap.
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2. Edit **usbconfig.h** to configure V-USB options.
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3. Edit **Makefile.vusb** to define `MCU` and `F_CPU`.
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4. Build firmware binary file:
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`$ make -f Makefile.vusb`
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5. Program MCU with AVR programmer like AVRISPmkII. If you already have [USBaspLoader] on MCU just run:
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`$ make -f Makefile.vusb program`
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[V-USB]: http://www.obdev.at/products/vusb/index.html
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[USBaspLoader]: http://www.obdev.at/products/vusb/usbasploader.html
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###How to Customize Keymap
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Later...
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See **keymap.c**.
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##Hardware
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###Teensy++ installation
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Angled USB mini B adapter is used to install Teensy++ laterally.
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![doc/HHKB_img/teensy_install.jpg]
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Bread baord wires are used to connect Teensy++.
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![doc/HHKB_img/teensy_wiring.jpg]
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![doc/HHKB_img/connector_contact.jpg]
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###PJRC Teensy++ 2.0 connection
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+---------------+
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| Teensy++ |
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| | HHKB
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| PB0-2|------->ROW(6-8)
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| PB3-5|------->COL(9-11)
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| PB6|------->ENABLE(12)
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| PE6|<-------KEY(4)
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| PE7|------->PREV(5)
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+---------------+
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###V-USB circuit
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+---+ +---------------+
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USB GND | | ATmega168 |
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~~~ C3 | |
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5V <-------+--------+---|Vcc,AVCC | HHKB
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R1 | | ~~~~
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D- <----+--+-----R2-----|INT1 PB2-4|------->ROW(6-8)
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D+ <----|---+----R3-----|INT0 PC0-2|------->COL(9-11)
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Z1 Z2 | PC3|------->ENABLE(12)
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GND<----+---+-----------|GND PB0|<-------KEY(4)
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| PB1|------->PREV(5)
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GND+-C2--+--|XTAL1 RXD|------->Debug Console
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X1 | TXD|<-------Debug Console
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GND+-C3--+--|XTAL2 RST|---SW--+GND
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+---------------+
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R1: 1.5K Ohm
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R2,R3: 68 Ohm
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Z1,Z2: Zener 3.6V
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C1,C2: 22pF
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C3: 0.1uF
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X1: Crystal 20MHz(16MHz/12MHz)
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SW: Push Switch(Optional for bootloader)
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@ -1,67 +1,16 @@
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Alternative Controller for HHKB pro
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Internal of HHKB pro
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===================================
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=====================
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I want to add vi cursor and mouse keys to HHKB. Original HHKB controller is not programmable and
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HHKB pro has MCU and some chips on separate two PCBs.
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firmware source code is not open. So, customizing HHKB needs to replace original controller with programmable one.
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I used Teensy++ as alternative controller. Though a Teensy has enough ports to drive HHKB,
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Teensy++ has clean pinout and it makes programing and wiring easier.
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This is just a proof of concept for replacing controller of HHKB, not a complete firmware.
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Controller PCB
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--------------
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My prototype firmware source tree is here:
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github(http://github.com/tmk/tmk_keyboard)
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This firmware is a port of my previous project:
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HHKB style Mod(http://geekhack.org/showwiki.php?title=Island:11930)
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PJRC:
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Teensy++/Teensy(http://www.pjrc.com/teensy/)
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Pros:
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* without pattern cutting, case mod and soldering
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* can keep original controller intact
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* can change HHKB behaviour as you like(by C programming)
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Cons:
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* void your warranty
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* unavailability of Teensy++/Teensy(because of PS3 cracking boom?)
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Features:
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* customized keymap
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* more keymap layers
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* mouse keys for minimum mouse operation(never comfortable for normal use)
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* and more...(in the future)
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Any suggestions or ideas are welcome.
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NOTE:
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My HHKB is just "Professional". This means followings may not be applied to "Professional2".
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DISCLAIMER:
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I'm not a professional for electronics and 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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Teensy++ installation
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---------------------
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Angled USB mini B adapter is used to install Teensy++ laterally.
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(teensy_install.jpg)
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Bread baord wires are used to connect Teensy++.
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(teensy_wiring.jpg)
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(connector_contact.jpg)
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HHKB internal
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-------------
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HHKB pro has some chips on separate two PCBs.
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Controller PCB:
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M38K07M4 Renesas MCU with USB function
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M38K07M4 Renesas MCU with USB function
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http://documentation.renesas.com/eng/products/mpumcu/rej03b0192_38k0ds.pdf
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http://documentation.renesas.com/eng/products/mpumcu/rej03b0192_38k0ds.pdf
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(HHKB_controller.jpg)
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(HHKB_controller.jpg)
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Keyswitch PCB:
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Keyswitch PCB
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-------------
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HC4051 Analog Multiplexer: select a row line.
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HC4051 Analog Multiplexer: select a row line.
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http://www.alldatasheet.com/datasheet-pdf/pdf/203989/KODENSHI/KK74HC4051A.html
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http://www.alldatasheet.com/datasheet-pdf/pdf/203989/KODENSHI/KK74HC4051A.html
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LS145 BCD Decoder: select a column line.
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LS145 BCD Decoder: select a column line.
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@ -76,13 +25,16 @@ Keyswitch PCB:
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(HHKB_TP1684.jpg)
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(HHKB_TP1684.jpg)
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Two PCBs are connected by 15 lines. Vcc and GND use 3 lines each, other 9 lines are for keyboard signaling.
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Connector Cable
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---------------
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Two PCBs are connected by 15 lines(13 in case of Pro2).
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Vcc and GND use 3(2) lines each, other 9 lines are for keyboard signaling.
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Keyswitch PCB connector Teensy++ pins
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Keyswitch PCB connector Teensy++ pins
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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1 Vcc(5V) 5V
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1 Vcc(5V) Not exist on Pro2 5V
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2 Vcc(5V)
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2 Vcc(5V) 5V
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3 Vcc(5V)
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3 Vcc(5V) 5V
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4 TP1684 KEY: Low(0) when key pressed PE6 input(with pullup)
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4 TP1684 KEY: Low(0) when key pressed PE6 input(with pullup)
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5 TP1684 KEY_PREV: assert previous key state??? PE7 output
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5 TP1684 KEY_PREV: assert previous key state??? PE7 output
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6 HC4051 A(bit0) select 8 rows(0 to 7) PB0 output
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6 HC4051 A(bit0) select 8 rows(0 to 7) PB0 output
|
||||||
|
|
@ -92,9 +44,11 @@ Two PCBs are connected by 15 lines. Vcc and GND use 3 lines each, other 9 lines
|
||||||
10 LS145 B(bit1) PB4 output
|
10 LS145 B(bit1) PB4 output
|
||||||
11 LS145 C(bit2) PB5 output
|
11 LS145 C(bit2) PB5 output
|
||||||
12 LS145 D(enable) Low(0) enable selected column PB6 output
|
12 LS145 D(enable) Low(0) enable selected column PB6 output
|
||||||
13 GND
|
13 GND GND
|
||||||
14 GND
|
14 GND GND
|
||||||
15 GND GND
|
15 GND Not exist on Pro2 GND
|
||||||
|
|
||||||
|
NOTE: guessing pin5(KEY_PREV) may work for hysteresis of capacitive sensing.
|
||||||
|
|
||||||
(HHKB_connector.jpg)
|
(HHKB_connector.jpg)
|
||||||
|
|
||||||
|
|
@ -103,19 +57,20 @@ Keyswitch matrix
|
||||||
----------------
|
----------------
|
||||||
60 keyswitches in 8*8 matrix. It is ghost-free and bounce-free.
|
60 keyswitches in 8*8 matrix. It is ghost-free and bounce-free.
|
||||||
|
|
||||||
COL 0 1 2 3 4 5 6 7
|
COL 0 1 2 3 4 5 6 7
|
||||||
ROW ---------------------------------------------------------------
|
ROW ---------------------------------------------------------------
|
||||||
0| 2 q w s a z x c
|
0| 2 q w s a z x c
|
||||||
1| 3 4 r e d f v b
|
1| 3 4 r e d f v b
|
||||||
2| 5 6 y t g h n _NONE_
|
2| 5 6 y t g h n _NONE_
|
||||||
3| 1 Esc Tab Control LShift LAlt LMeta Space
|
3| 1 Esc Tab Control LShift LAlt LMeta Space
|
||||||
4| 7 8 u i k j m _NONE_
|
4| 7 8 u i k j m _NONE_
|
||||||
5| \ ` Delete Return Fn RShift RAlt RMeta
|
5| \ ` Delete Return Fn RShift RAlt RMeta
|
||||||
6| 9 0 o p ; l , _NONE_
|
6| 9 0 o p ; l , _NONE_
|
||||||
7| - + ] [ ' / . _NONE_
|
7| - + ] [ ' / . _NONE_
|
||||||
|
|
||||||
|
|
||||||
Matrix diagram:
|
Matrix diagram:
|
||||||
|
|
||||||
+-------------------------+-+-+-+-+-+-+-+ Vcc
|
+-------------------------+-+-+-+-+-+-+-+ Vcc
|
||||||
|bias control? - - - - - - - - ---
|
|bias control? - - - - - - - - ---
|
||||||
| 3.9K*8 R R R R R R R R |
|
| 3.9K*8 R R R R R R R R |
|
||||||
|
|
@ -141,7 +96,8 @@ Matrix diagram:
|
||||||
to controller
|
to controller
|
||||||
|
|
||||||
|
|
||||||
Signals charts:
|
Signals charts
|
||||||
|
--------------
|
||||||
While pressing space bar, watched HHKB original controller signals by logic analyzer.
|
While pressing space bar, watched HHKB original controller signals by logic analyzer.
|
||||||
Row and column is looping between 0-7 each for selecting a key.
|
Row and column is looping between 0-7 each for selecting a key.
|
||||||
A key is scaned every about 15ms, so scan rate is 66Hz.
|
A key is scaned every about 15ms, so scan rate is 66Hz.
|
||||||
|
|
@ -157,7 +113,8 @@ Signals charts:
|
||||||
(HHKB_chart2.jpg)
|
(HHKB_chart2.jpg)
|
||||||
|
|
||||||
|
|
||||||
Matrix scan pseudo code:
|
Matrix scan pseudo code
|
||||||
|
-----------------------
|
||||||
for (row: 0-7) {
|
for (row: 0-7) {
|
||||||
SELECT_ROW(row); // set HC4051(A,B,C)
|
SELECT_ROW(row); // set HC4051(A,B,C)
|
||||||
|
|
||||||
|
|
@ -190,10 +147,5 @@ Matrix scan pseudo code:
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
||||||
Keymap layers
|
|
||||||
-------------
|
|
||||||
Followings are added layers with additional Fn keys.
|
|
||||||
|
|
||||||
see keymap.c
|
|
||||||
|
|
||||||
EOF
|
EOF
|
||||||
|
|
|
||||||
|
|
@ -0,0 +1,32 @@
|
||||||
|
|
||||||
|
iWRAP
|
||||||
|
-----
|
||||||
|
+---------------+ WT12
|
||||||
|
5V | ATmega168 | 5V/3.3V~~~~
|
||||||
|
+-----+---|Vcc,AVCC PC4|---/--->iWRAP(RxD)
|
||||||
|
USB | C3 | PC5|<--/----iWRAP(TxD)
|
||||||
|
~~~ | + | |
|
||||||
|
5V <--BATT + GND | | 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 12MHz
|
||||||
|
SW: Push Switch(Optional)
|
||||||
|
BATT: Li-Po Battery, Battery Charger and Voltage Regulator(5V and 3.3V).
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
Loading…
Reference in New Issue