.. | ||
config_mbed.h | ||
config_tmk_rev1.h | ||
config_tmk_rev2.h | ||
config.h | ||
keymap_common.c | ||
keymap_common.h | ||
keymap_jis.c | ||
keymap_plain.c | ||
keymap_spacefn.c | ||
led.c | ||
main.cpp | ||
Makefile | ||
Makefile.mbed | ||
Makefile.pjrc | ||
Makefile.tmk_rev1 | ||
Makefile.tmk_rev2 | ||
Makefile.vusb | ||
matrix.c | ||
README.md | ||
usbconfig.h |
PS/2 to USB keyboard converter
This firmware converts PS/2 keyboard protocol to USB.(It supports Scan Code Set 2.)
Connect Wires
In case of Teensy2.0(ATMega32U4):
- Connect Vcc and GND.
- Connect Clock and Data line.
- Interrupt: Clock is on
PD1
and Data onPD0
.(Recommended. Soarer's converter compatible) - Busywait: Clock is on
PD1
and Data onPD0
. - USART: Clock is on
PD5
and Data onPD2
.
- Interrupt: Clock is on
- Optionally you need pull-up resistor. 1K-10K Ohm is OK.
To change pin configuration edit config.h and Makefile.
Build Firmware
For PJRC Teensy just run make
:
$ make clean
$ make
To select keymap:
$ make clean
$ make KEYMAP=[plain|jis|spacefn|...]
After that you will find HEX file ps2_usb_lufa.hex
in current directory.
-
For TMK converter Rev.1 use
make -f Makefile.tmk_rev1
instead ofmake
and HEX file isps2_usb_tmk_rev1.hex
. -
For TMK converter Rev.2 use
make -f Makefile.tmk_rev2
instead ofmake
and HEX file isps2_usb_tmk_rev2.hex
.
Keymap
Several version of keymap are available in advance but you are recommended to define your favorite layout yourself. To define your own keymap create file named keymap_<name>.c
and see keymap document(you can find in README.md of top directory) and existent keymap files.
PS/2 signal handling implementations
Following three methods can be used to implement PS/2 signal handling.
Simple and stupid busy-wait(ps2_busywait.c)
This is expected to implemented with portable C code for reference.
Interrupt driven(ps2_interrupt.c)
Uses pin interrupt to detect falling edge of clock line.
USART hardware module(ps2_usart.c)
Uses AVR USART engine to receive PS/2 signal.
To select method edit Makefile.
V-USB Support
With V-USB you can use this converter on ATmega(168/328) but it doesn't support NKRO at this time.
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)