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diff --git a/HHKB/HHKB.txt b/HHKB/HHKB.txt deleted file mode 100644 index 9440efebf4..0000000000 --- a/HHKB/HHKB.txt +++ /dev/null @@ -1,186 +0,0 @@ -Alternative Controller for HHKB pro -=================================== -I want to add vi cursor and mouse keys to HHKB. Original HHKB controller is not programmable and -firmware source code is not open. So, customizing HHKB needs to replace original controller with programmable one. -I used Teensy++ as alternative controller. Though a Teensy has enough ports to drive HHKB, -Teensy++ has clean pinout and it makes programing and wiring easier. - -This is just a proof of concept for replacing controller of HHKB, not a complete firmware. - -My prototype firmware source tree is here: - branch: hhkb(http://github.com/tmk/tmk_keyboard/tree/hhkb) -This firmware is a port of my previous project: - HHKB style Mod(http://geekhack.org/showwiki.php?title=Island:11930) -PJRC: - Teensy++/Teensy(http://www.pjrc.com/teensy/) - - -Pros: - * without pattern cutting, case mod and soldering - * can keep original controller intact - * can change HHKB behaviour as you like(by C programming) - -Cons: - * void your warranty - * unavailability of Teensy++/Teensy(because of PS3 cracking boom?) - -Features: - * customized keymap - * more keymap layers - * mouse keys for minimum mouse operation(never comfortable for normal use) - * and more...(in the future) - -Any suggestions or ideas are welcome. - - -NOTE: - My HHKB is just "Professional". This means followings may not be applied to "Professional2". - -DISCLAIMER: - I'm not a professional for electronics and MCU programming. This may damage your HHKB. - And my English writing is poor, I'm not sure I can convey my notions accurately. - - -Teensy++ installation ---------------------- -Angled USB mini B adapter is used to install Teensy++ laterally. -(teensy_install.jpg) - -Bread baord cables used for connect Teensy++. -(teensy_wiring.jpg) -(connector_contact.jpg) - - -HHKB internal -------------- -HHKB pro has two PCBs and some chips. - -Controller PCB: - M38K07M4 Renesas MCU with USB function - http://documentation.renesas.com/eng/products/mpumcu/rej03b0192_38k0ds.pdf - - (HHKB_controller.jpg) - -Keyswitch PCB: - HC4051 Analog Multiplexer: select a row line. - http://www.alldatasheet.com/datasheet-pdf/pdf/203989/KODENSHI/KK74HC4051A.html - LS145 BCD Decoder: select a column line. - http://www.alldatasheet.com/datasheet-pdf/pdf/27373/TI/SN74LS145D.html - BU9831 Non-volatile electronic potentiometer: for calibration? - http://www.alldatasheet.com/datasheet-pdf/pdf/36387/ROHM/BU9831.html - TP1684 Capacitive Sensing controller: no datasheet available. - - (HHKB_keyswitch.jpg) - - Topre original chip? - (HHKB_TP1684.jpg) - - -Two PCBs are connected by 15 lines. Vcc/GND uses 3 lines each, 9lines for keyboard signaling. - - Keyswitch PCB connector Teensy++ pins - ------------------------------------------------------------------------------- - 1 Vcc(5V) 5V - 2 Vcc(5V) - 3 Vcc(5V) - 4 TP1684 KEY: Low(0) when key pressed PE6 input(with pullup) - 5 TP1684 unknown:how to use PE7 input(with pullup) - 6 HC4051 A(bit0) select 8 rows(0 to 7) PB0 output - 7 HC4051 B(bit1) PB1 output - 8 HC4051 C(bit2) PB2 output - 9 LS145 A(bit0) select 8 columns(0 to 7) PB3 output - 10 LS145 B(bit1) PB4 output - 11 LS145 C(bit2) PB5 output - 12 LS145 D(enable) Low(0) enable selected column PB6 output - 13 GND - 14 GND - 15 GND GND - - (HHKB_connector.jpg) - - -Keyswitch matrix ----------------- -60 keyswitches in 8*8 matrix. ghost free. bounce free. - - COL 0 1 2 3 4 5 6 7 -ROW --------------------------------------------------------------- - 0| 2 q w s a z x c - 1| 3 4 r e d f v b - 2| 5 6 y t g h n _NONE_ - 3| 1 Esc Tab Control LShift LAlt LMeta Space - 4| 7 8 u i k j m _NONE_ - 5| \ ` Delete Return Fn RShift RAlt RMeta - 6| 9 0 o p ; l , _NONE_ - 7| - + ] [ ' / . _NONE_ - - -Matrix diagram: - +-------------------------+-+-+-+-+-+-+-+ Vcc - |bias control? - - - - - - - - --- - | 3.9K*8 R R R R R R R R | - +--------^+ +--------+ - - - - - - - - | - | TP 1684 | | HC4051 <0-------|-|-|-|-|-|-|-|--|R|-+ - | |capa. | <1-------|-|-|-|-|-|-|-|--|R|-+ - | |sense | <2-------|-|-|-|-|-|-|-|--|R|-+ - | <------| <3-------|-|-|-|-|-|-|-|--|R|-+ - | | | <4-------|-|-|-|-|-|-|-|--|R|-+ - | | | <5-------|-|-|-|-|-|-|-|--|R|-+ - | |calib.| <6-------|-|-|-|-|-|-|-|--|R|-+ - | <-+? | <7-------|-|-|-|-|-|-|-|--|R|-+ - +---V-----+ | +-^-^-^--+ 0 1 2 3 4 5 6 7 33K*8 - KEY ??? | A B C +-----------------+ - | | +-^----+ | | | | LS145 | - Vcc | | |BU9831| | | | +-^--^--^--^------+ - --- | | +------+ | | | A B C D +------+ - | | | | | | | | | | | | - 1-3 4 5 6 7 8 9 10 11 12 13-15 | - +--------------------------------------------------+ | - | connector | --- - +--------------------------------------------------+ GND - to controller - - -Signals charts: - 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. - A key is scaned every about 15ms, so scan rate is 66Hz. - - (HHKB_chart1.jpg) - - Space bar locate at ROW:3 COL:7. Key are selected by HC4051(C,B,A) and LS145(C,B,A). - Key state can be read on TP1684(4/KEY) while asserting low on LS145(D). - Usage of TP1684(5) is unknown. Key state can be read without using this signal. - - (HHKB_chart2.jpg) - - -Matrix scan pseudo code: - for (row: 0-7) { - SELECT_ROW(row); // set HC4051(A,B,C) - - for (col: 0-7) { - SELECT_COL(col); // set LS145(A,B,C) - - _delay_us(50); - - ENALBLE_COL(); // set LS145(D) to low - - _delay_us(10); - - if (KEY == 0) { // read TP1684(KEY) - // key pressed - } else { - // not pressed - } - } - } - - -Keymap layers -------------- -Followings are added layers with additional Fn keys. They are not final decision. - -see keymap_hhkb.c - -EOF |