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Diffstat (limited to 'converter/ps2_usb/README')
| -rw-r--r-- | converter/ps2_usb/README | 116 |
1 files changed, 61 insertions, 55 deletions
diff --git a/converter/ps2_usb/README b/converter/ps2_usb/README index c10393e5e7..cb7ba55551 100644 --- a/converter/ps2_usb/README +++ b/converter/ps2_usb/README @@ -1,7 +1,7 @@ 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. +This firmware converts PS/2 keyboard protocol to USB and supports only Scan Code Set 2. +This will works on USB AVR(ATMega32U4, AT90USB) or V-USB(ATMega168, 328...). Features @@ -19,25 +19,29 @@ Keymap customization 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. +a. Simple and stupid busy-wait(ps2.c) + This is expected to implemented with portable C code for reference. +b. Interrupt driven(ps2.c) + Uses external interrupt to detect falling edge of clock line. +c. USART hardware module(ps2_usart.c) + Uses AVR USART engine to recevie PS/2 signal. Recomended and default. + This is required to work with V-USB, preceding two methods tend to + miss signal edges while V-USB handles USB. + +To select method edit Makefile. + + +Connect Wires +------------- +In case of Teensy2.0(ATMega32U4): +0. Connect Vcc and GND. +1. Connect Clock and Data line. + For a. Clock is on PF0 and Data on PF1. + For b. Clock is on PD1 and Data on PD2. + For c. Clock is on PD5 and Data on PD2. +2. Optionally you need pull-up register. 1K-10K Ohm is OK. + +To change pin configuration edit config.h. Build Frimware @@ -45,12 +49,12 @@ 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 + Just type `make` in a terminal. + Use `-f Makefile.vusb` option to build V-USB converter. + Use `-f Makefile.jis` option to use JIS keyboard. +3. program MCU. + In case of Teensy use `Teensy Loader`.(http://www.pjrc.com/teensy/loader.html) + Otherwise you want to use `avrdude` or `dfu-programmer`. Demonstration of Features @@ -83,34 +87,36 @@ Fn layer function: 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 - ), +You can change a keymap by editing code of keymap. See common/keycode.h for key symbols. + + +V-USB Support +------------- +You can also use this converter on ATmega(168/328) with V-USB instead of Teensy. +The converter on V-USB lacks some features for now: USB NKRO and System/Media control. + +Circuit +------- + +---+ +---------------+ +USB GND | | ATmega168 | +=== C3 | | +5V <-------+--------+---|Vcc,AVCC | PS/2 + R1 | | ==== +D- <----+--+-----R2-----|INT1 RXD|------->DATA +D+ <----|---+----R3-----|INT0 XCK|------->CLOCK + Z1 Z2 | | ->5V +GND<----+---+--+--+-----|GND | ->GND + | | | | + | C2-+--|XTAL1 | + | X1 | | + +--C3-+--|XTAL2 | + +---------------+ +R1: 1.5K Ohm +R2,R3: 68 Ohm +Z1,Z2: Zenner 3.6V +C1,C2: 22pF +C3: 0.1uF +X1: Crystal 20MHz(16MHz/12MHz) EOF |