v3.0 cleanse files
tmk
14 years ago
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d2b9489a5e
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ADB Protocol
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============
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Resources
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---------
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ADB - The Untold Story: Space Aliens Ate My Mouse
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http://developer.apple.com/legacy/mac/library/#technotes/hw/hw_01.html
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Apple IIgs Hardware Reference Second Edition [p80(Chapter6 p121)]
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ftp://ftp.apple.asimov.net/pub/apple_II/documentation/Apple%20IIgs%20Hardware%20Reference.pdf
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ADB Keycode
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http://72.0.193.250/Documentation/macppc/adbkeycodes/
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http://m0115.web.fc2.com/m0115.jpg
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[Inside Macintosh volume V, pages 191-192]
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ADB Signaling
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http://kbdbabel.sourceforge.net/doc/kbd_signaling_pcxt_ps2_adb.pdf
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ADB Overview & History
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http://en.wikipedia.org/wiki/Apple_Desktop_Bus
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Microchip Application Note: ADB device(with code for PIC16C)
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http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1824&appnote=en011062
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AVR ATtiny2131 ADB to PS/2 converter(Japanese)
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http://hp.vector.co.jp/authors/VA000177/html/KeyBoardA5DEA5CBA5A2II.html
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Pinouts
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-------
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ADB female socket from the front:
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__________
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| | <--- top
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| 4o o3 |
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|2o o1|
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| == |
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|________| <--- bottom
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| | <--- 4pins
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ADB female socket from bottom:
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========== <--- front
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|2o o1|
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|4o o3|
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---------- <--- back
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1: Data
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2: Power SW(low when press Power key)
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3: Vcc(5V)
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4: GND
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Commands
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--------
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ADB command is 1byte and consists of 4bit-address, 2bit-command
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type and 2bit-register. The commands are always sent by Host.
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Command format:
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7 6 5 4 3 2 1 0
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| | | |------------ address
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| |-------- command type
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| |---- register
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bits commands
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------------------------------------------------------
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- - - - 0 0 0 0 Send Request(reset all devices)
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A A A A 0 0 0 1 Flush(reset a device)
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- - - - 0 0 1 0 Reserved
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- - - - 0 0 1 1 Reserved
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- - - - 0 1 - - Reserved
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A A A A 1 0 R R Listen(write to a device)
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A A A A 1 1 R R Talk(read from a device)
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The command to read keycodes from keyboard is 0x2C which
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consist of keyboard address 2 and Talk against register 0.
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Address:
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2: keyboard
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3: mice
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Registers:
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0: application(keyobard uses this to store its data.)
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1: application
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2: application(keyboard uses this for LEDs and state of modifiers)
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3: status and command
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Communication
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-------------
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This is a minimum information for keyboard communication.
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See "Resources" for detail.
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Signaling:
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~~~~____________~~||||||||||||__~~~~~_~~|||||||||||||||__~~~~
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|800us | |7 Command 0| | | |15-64 Data 0|Stopbit(0)
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+Attention | | | +Startbit(1)
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+Startbit(1) | +Tlt(140-260us)
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+stopbit(0)
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Bit cells:
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bit0: ______~~~
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65 :35us
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bit1: ___~~~~~~
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35 :65us
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bit0 low time: 60-70% of bit cell(42-91us)
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bit1 low time: 30-40% of bit cell(21-52us)
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bit cell time: 70-130us
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[from Apple IIgs Hardware Reference Second Edition]
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Criterion for bit0/1:
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After 55us if line is low/high then bit is 0/1.
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Attention & start bit:
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Host asserts low in 560-1040us then places start bit(1).
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Tlt(Stop to Start):
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Bus stays high in 140-260us then device places start bit(1).
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Global reset:
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Host asserts low in 2.8-5.2ms. All devices are forced to reset.
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Send request from device(Srq):
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Device can request to send at commad(Global only?) stop bit.
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keep low for 300us to request.
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Keyboard Data(Register0)
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This 16bit data can contains two keycodes and two released flags.
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First keycode is palced in upper byte. When one keyocode is sent,
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lower byte is 0xFF.
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Release flag is 1 when key is released.
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1514 . . . . . 8 7 6 . . . . . 0
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| | | | | | | | | +-+-+-+-+-+-+- Keycode2
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| | | | | | | | +--------------- Released2(1 when the key is released)
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| +-+-+-+-+-+-+----------------- Keycode1
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+------------------------------- Released1(1 when the key is released)
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Keycodes:
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Scancode consists of 7bit keycode and 1bit release flag.
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Device can send two keycodes at once. If just one keycode is sent
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keycode1 contains it and keyocode2 is 0xFF.
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Power switch:
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You can read the state from PSW line(active low) however
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the switch has a special scancode 0x7F7F, so you can
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also read from Data line. It uses 0xFFFF for release scancode.
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Keyboard LEDs & state of keys(Register2)
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This register hold current state of three LEDs and nine keys.
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The state of LEDs can be changed by sending Listen command.
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1514 . . . . . . 7 6 5 . 3 2 1 0
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| | | | | | | | | | | | | | | +- LED1(NumLock)
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| | | | | | | | | | | | | | +--- LED2(CapsLock)
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| | | | | | | | | | | | | +----- LED3(ScrollLock)
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| | | | | | | | | | +-+-+------- Reserved
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| | | | | | | | | +------------- ScrollLock
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| | | | | | | | +--------------- NumLock
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| | | | | | | +----------------- Apple/Command
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| | | | | | +------------------- Option
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| | | | | +--------------------- Shift
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| | | | +----------------------- Control
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| | | +------------------------- Reset/Power
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| | +--------------------------- CapsLock
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| +----------------------------- Delete
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+------------------------------- Reserved
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END_OF_ADB
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@ -1,103 +0,0 @@
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TODO & IDEAS
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------------
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Code cleaning
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keymap layer definition
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Debug/Config console
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keymap/layer setting
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layer switching timing
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matrix display
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help
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display keymap
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display matrix(row, col)
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debug console
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through PJRC console
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through UART/USB CDC
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mouse acceleration
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store setting to EEPROM
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Document
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development
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Interchangable protocol stack
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USB
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PJRC stack(default currently)
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LUFA
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original minimal stack for keyboard/mouse
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PS/2
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from keyboard-upgrade?
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Layer switch
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toggle layer switch
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Debouncing logic
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will be coded when bouncing occurs.
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bouncing doesnt occur on my ALPS switch so far.
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scan rate is too slow?(to be measure)
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Child lock
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disable keyboard to protect against atacking by child
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Windows key blocking
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disable Windows keys for gamers
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OneHand operation
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RAlt + Del(or \) to Alt + Tab
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Licensings(GPL)
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GPL will not be infringement of PJRC license.
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Extra switch
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foot sw for layer switching
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mouse button
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PS/2->USB keyboard converter
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PS/2 keyboard host protocol support
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PS/2,USB detection
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act as PS/2 keyboard or USB keyboard.
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PS/2 keyboard device protocol support
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Thinkpad keyboard support
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turn to USB keyboard/mouse composite device
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Other MCU/board support
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architectures on which GCC is available.
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AT90USBKEY and other AVR USB boards
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Cortex-M3 ARM board(STM32)
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http://strawberry-linux.com/catalog/items?code=32105
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Separate keyboard support
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comunicate between keyboards by I2C?
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this is for ergo keyoboard style.
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DONE & STATUS
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-------------
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PS2 mouse bug to be FIX'd
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macway/matrix: line select changes pins for mouse.
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2010/01/02
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support for HHKB pro matrix signal
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exchange controller board with teensy
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2010/10/11
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OneHand operation
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Matias half keyboard style
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2010/10/23
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souce code cleaning
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2010/10/23
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debug on/off
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debug off by default
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pressing keys during booting
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2010/10/23
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mouse horizontal wheel
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http://www.microchip.com/forums/tm.aspx?high=&m=391435&mpage=1#391521
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http://www.keil.com/forum/15671/
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http://www.microsoft.com/whdc/device/input/wheel.mspx
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2010/10/13
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debug on/off
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Fn key conbination during normal operation
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matrix print on/off
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key print on/off
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mouse print on/off
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2010/10/26
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layer switching
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time before switching
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timeout when not used during specific time
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2010/10/30
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Build Option
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windows media keys suport
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2010/01/06
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Document
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build, customize
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2010/01/06
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Trackpoint(PS/2)
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receive PS/2 signal from TrackPoint
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2010/01/02
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send USB HID report
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EOF
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