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 PD2 and Data on PD5. 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