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qmk_firmware/converter/adb_usb
History
tmk 540d0700dc Remove common/controller_teensy.h 12 years ago
..
Makefile Add new build options to adb_usb 12 years ago
Makefile.lufa Add new build options to adb_usb 12 years ago
README.md Fix Locking CapsLock support in ADB converter 12 years ago
config.h Remove common/controller_teensy.h 12 years ago
keymap.c Add m0116 keymap from tufty 12 years ago
led.c Made directories for keyboard and converter projects. 13 years ago
matrix.c Add new build options to adb_usb 12 years ago

README.md

ADB to USB keyboard converter

This firmware converts ADB keyboard protocol to USB. You can use PJRC Teensy for this converter, though, other USB AVR(ATMega32U4, AT90USB64/128 or etc) should work. But binary size is about 10KB or more it doesn't fit into 8K flash like ATMega8U2.

Discuss: http://geekhack.org/showwiki.php?title=Island:14290

Build

  1. Connect ADB keyboard to Teensy by 3 lines(Vcc, GND, Data). By default Data line uses port F0. This converter uses AVR's internal pull-up, but it seems to be too weak, in particular when you want to use a long or coiled cable. The external pull-up resistor(1K-10K Ohm) on Data is strongly recommended.
  2. Define following macros for ADB connection in config.h if you use other than port F0. ADB_PORT, ADB_PIN, ADB_DDR, ADB_DATA_BIT
  3. make
  4. program Teensy

LOCKING CAPSLOCK

Many of old ADB keyboards have mechanical push-lock switch for Capslock key and this converter supports the locking Capslock key by default. See README in top directory for more detail about this feature.

Also you may want to remove locking pin from the push-lock switch to use capslock as a normal momentary switch. http://www.youtube.com/watch?v=9wqnt2mGJ2Y

Keymap

You can change a keymap by editing code of keymap.c like following. This is a keymap for AEK, however, also used for other keyboards. How to define the keymap is probably obvious. You can find key symbols in keycode.h. If you want to define some keymaps than just one, see hhkb/keymap.c and macway/keymap.c as examples. Keymap(layer) switching may needs a bit of effort at this time.

/* Default Layer: plain keymap
 * ,---.   ,---------------. ,---------------. ,---------------. ,-----------.             ,---.
 * |Esc|   |F1 |F2 |F3 |F4 | |F5 |F6 |F7 |F8 | |F9 |F10|F11|F12| |PrS|ScL|Pau|             |Pwr|
 * `---'   `---------------' `---------------' `---------------' `-----------'             `---'
 * ,-----------------------------------------------------------. ,-----------. ,---------------.
 * |  `|  1|  2|  3|  4|  5|  6|  7|  8|  9|  0|  -|  =|Backspa| |Ins|Hom|PgU| |NmL|  =|  /|  *|
 * |-----------------------------------------------------------| |-----------| |---------------|
 * |Tab  |  Q|  W|  E|  R|  T|  Y|  U|  I|  O|  P|  [|  ]|    \| |Del|End|PgD| |  7|  8|  9|  -|
 * |-----------------------------------------------------------| `-----------' |---------------|
 * |CapsLo|  A|  S|  D|  F|  G|  H|  J|  K|  L|  ;|  '|Return  |               |  4|  5|  6|  +|
 * |-----------------------------------------------------------|     ,---.     |---------------|
 * |Shift   |  Z|  X|  C|  V|  B|  N|  M|  ,|  ,|  /|Shift     |     |Up |     |  1|  2|  3|   |
 * |-----------------------------------------------------------| ,-----------. |-----------|Ent|
 * |Ctrl |Gui |Alt |         Space           |     |    |      | |Lef|Dow|Rig| |      0|  .|   |
 * `-----------------------------------------------------------' `-----------' `---------------'
 */
KEYMAP(
ESC, F1,  F2,  F3,  F4,  F5,  F6,  F7,  F8,  F9,  F10, F11, F12,           PSCR,SLCK,BRK,                    PWR,
GRV, 1,   2,   3,   4,   5,   6,   7,   8,   9,   0,   MINS,EQL, BSPC,     INS, HOME,PGUP,    NLCK,EQL, PSLS,PAST,
TAB, Q,   W,   E,   R,   T,   Y,   U,   I,   O,   P,   LBRC,RBRC,BSLS,     DEL, END, PGDN,    P7,  P8,  P9,  PMNS,
LCAP,A,   S,   D,   F,   G,   H,   J,   K,   L,   SCLN,QUOT,     ENT,                         P4,  P5,  P6,  PPLS,
LSFT,Z,   X,   C,   V,   B,   N,   M,   COMM,DOT, SLSH,          RSFT,          UP,           P1,  P2,  P3,
LCTL,LGUI,LALT,          SPC,                                              LEFT,DOWN,RGHT,    P0,       PDOT,PENT
),

Magic command

To get help press h holding Magic key. Magic key is Power key.

Notes

Many ADB keyboards has no discrimination between right modifier and left one, you will always see left control even if you press right control key. Apple Extended Keyboard and Apple Extended Keyboard II are the examples. Though ADB protocol itsef has the ability of distinction between right and left. And most ADB keyboard has no NKRO functionality, though ADB protocol itsef has that. See protocol/adb.c for more info.

EOF