PS/2 to USB keyboard converter
==============================
This firmware converts PS/2 keyboard protocol to USB and for now supports only Scan Code Set 2.
This will works on USB AVR(ATMega32U4, AT90USB) or V-USB.
Features
--------
Mouse keys
You can emulates mouse move and button click using keyboard.
System/Media control
You can sends Power event, Volume down/up and Mute.
USB NKRO(actually 120KRO+8Modifiers)
You can tolggles NKRO feature.
Keymap customization
You can customize keymaps easily by editing source code. See keymap.c.
PS/2 signal handling implementations
------------------------------------
Following three methods are used to implement PS/2 signal handling.
a. Simple and stupid wait & read loop(intensive use of cycles)
This is implemented with (expected) portable C code for reference. See ps2.c.
b. Interrupt driven
See ps2_intr.c
c. Using USART hardware module(no cycle needed)
This uses AVR USART function to recevie PS/2 signal and be used in V-USB converter.
See ps2_usart.c.
Build Converter
---------------
Connect PS/2 keyboard into Teensy with 4 lines(Vcc, GND, Data, Clock).
For a. Simple and stupid and b. Interrupt implementaion:
By default Clock is on PF0 and Data on PF1.
You can change this pin configuration by editing config_pjrc.h.
In this photo Vcc is yellow, GND is green, Data is red and Clock is black.
http://img17.imageshack.us/img17/7243/201101181933.jpg
For c. USART implementation:
In case of Teensny(ATMega32u4) CLock is on PD5 and Data on PD2.
Build Frimware
--------------
1. Edit Makefile for build options and MCU setting.
Use 'atmega32u4' for Teensy 2.0 or 'at90usb1286' for Teensy++ 2.0.
2. make
Just type 'make' in a terminal.
Use '-f Makefile.pjrc_intr' option to use b. Interrupt.
Use '-f Makefile.pjrc_usart' option to use c. USART.
Use '-f Makefile.vusb' option to build V-USB converter.
3. program with Teensy Loader.
http://www.pjrc.com/teensy/loader.html
Demonstration of Features
-------------------------
In default configuration, you can try several keymaps, mousekeys and USB NKRO.
Use following magic key combinations to enable some features.
keymaps and NKRO:
Magic+0: Qwerty with mousekeys(default)
Magic+1: Qwerty without mousekeys
Magic+2: Colemak
Magic+3: Dvorak
Magic+4: Workman
Magic+N: toggles NKRO/6KRO(6KRO by default)
Magic+Esc: sends Power Event(Power button)
where Magic=(LShift+RShift) or (LControl+RShift)
Fn layer function:
Fn0+(hjkl): Mousekey move(vi cursor like)
Fn0+(yuio): Mouse wheel(left,down,up,right)
Fn0+space: Mouse left button
Fn0+(mnb): Mouse buttons(m=left, n=right, b=middle)
Fn0+(zxc): Media control(Volup, Voldown, Mute)
Fn1+(hjkl): Cursor move(vi cursor like)
Fn1+(nm,.): Cursor move(Home,PageDown,PageUp,End)
where Fn0=;, Fn1=/
Keymap
------
You can change a keymap by editing code of keymap.c like following.
How to define the keymap is probably obvious. You can find key symbols in usb_keycodes.h.
To define keymap layer switching may needs a bit of your 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|Slp|Wak|
* `---' `---------------' `---------------' `---------------' `-----------' `-----------'
* ,-----------------------------------------------------------. ,-----------. ,---------------.
* | `| 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 |Alt |Gui |Menu|Ctrl| |Lef|Dow|Rig| | 0| .| |
* `-----------------------------------------------------------' `-----------' `---------------'
*/
KEYMAP(
ESC, F1, F2, F3, F4, F5, F6, F7, F8, F9, F10, F11, F12, PSCR,SLCK,BRK, PWR, F13, F14,
GRV, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, MINS,EQL, BSPC, INS, HOME,PGUP, NLCK,PSLS,PAST,PMNS,
TAB, Q, W, E, R, T, Y, U, I, O, P, LBRC,RBRC,BSLS, DEL, END, PGDN, P7, P8, P9,
CAPS,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, RALT,RGUI,APP, RCTL, LEFT,DOWN,RGHT, P0, PDOT,PENT
),
EOF
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