You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
104 lines
3.1 KiB
104 lines
3.1 KiB
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
|
|
|
|
|
|
|
|
README FIRST
|
|
------------
|
|
https://github.com/tmk/tmk_keyboard
|
|
https://github.com/tmk/tmk_keyboard/tree/master/converter/adb_usb
|
|
|
|
Also check these when you are in trouble.
|
|
|
|
https://github.com/tmk/tmk_keyboard/wiki
|
|
https://github.com/tmk/tmk_keyboard/labels/NOTE
|
|
|
|
|
|
Wiring
|
|
------
|
|
Connect ADB pins to controller just by 3 lines(Vcc, GND, Data). By default Data line uses port PD0.
|
|
|
|
ADB female socket from the front:
|
|
|
|
,--_--.
|
|
/ o4 3o \ 1: DATA
|
|
| o2 1o | 2: Power SW
|
|
- === - 3: VCC
|
|
`-___-' 4: GND
|
|
|
|
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.(It is almost must!)
|
|
https://github.com/tmk/tmk_keyboard/wiki/FAQ#pull-up-resistor
|
|
|
|
Pull-up resister:
|
|
|
|
Keyboard Conveter
|
|
,------.
|
|
5V------+------|VCC |
|
|
| | |
|
|
[R] | |
|
|
| | |
|
|
Signal--+------|PD0 |
|
|
| |
|
|
GND------------|GND |
|
|
`------'
|
|
R: 1K Ohm resistor
|
|
|
|
|
|
Define following macros for ADB connection in config.h if you use other than port PD0.
|
|
|
|
ADB_PORT, ADB_PIN, ADB_DDR, ADB_DATA_BIT
|
|
|
|
|
|
Build
|
|
-----
|
|
See doc/build.md. In short,
|
|
|
|
$ make clean
|
|
$ make
|
|
|
|
You can select keymap(ansi is default) like this:
|
|
|
|
$ make KEYMAP=[ansi|iso|hasu]
|
|
|
|
|
|
Keymap
|
|
------
|
|
You can change a keymap by editing code of keymap_[ansi|iso|hasu|yours].c.
|
|
How to define the keymap is probably obvious. You can find key symbols in common/keycode.h. And see doc/keymap.md for more detail.
|
|
|
|
|
|
Magic command
|
|
-------------
|
|
To get help press `h` holding Magic key. Magic key is `Power key`.
|
|
|
|
|
|
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.
|
|
https://github.com/tmk/tmk_keyboard/blob/master/README.md#mechanical-locking-support
|
|
|
|
Also you may want to remove locking pin from the push-lock switch to use capslock as a normal momentary switch.
|
|
|
|
|
|
Notes
|
|
-----
|
|
Not-extended ADB keyboards have 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 can discriminate both side
|
|
modifiers except for GUI key(Windows/Command).
|
|
|
|
And most ADB keyboard has no diodes in its matrix so they are not NKRO,
|
|
though ADB protocol itself supports it. See protocol/adb.c for more info.
|
|
|
|
If keyboard has ISO layout you need to use ISO keymap with `make KEYMAP=iso`. With ANSI
|
|
keymap you will suffer from swapped keys problem.
|
|
|
|
https://github.com/tmk/tmk_keyboard/issues/35
|
|
|
|
EOF
|