From e3bcdd8211743607a8812f2dee78ee8ae6965209 Mon Sep 17 00:00:00 2001 From: tmk Date: Fri, 29 Nov 2013 23:52:29 +0900 Subject: Add SpaceFN keymap and JIS keymap --- converter/ps2_usb/README.md | 76 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 76 insertions(+) create mode 100644 converter/ps2_usb/README.md (limited to 'converter/ps2_usb/README.md') diff --git a/converter/ps2_usb/README.md b/converter/ps2_usb/README.md new file mode 100644 index 000000000..65e616efb --- /dev/null +++ b/converter/ps2_usb/README.md @@ -0,0 +1,76 @@ +PS/2 to USB keyboard converter +============================== +This firmware converts PS/2 keyboard protocol to USB and supports only Scan Code Set 2. + + +PS/2 signal handling implementations +------------------------------------ +Following three methods are 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 recevie PS/2 signal. + +To select method edit Makefile. + + +Connect Wires +------------- +In case of Teensy2.0(ATMega32U4): + +1. Connect Vcc and GND. +2. Connect Clock and Data line. + - Busywait: Clock is on PD5 and Data on PD2. + - Interrupt: Clock is on PD1 and Data on PD2. + - USART: Clock is on PD5 and Data on PD2. +3. Optionally you need pull-up register. 1K-10K Ohm is OK. + +To change pin configuration edit config.h. + + +Build Frimware +-------------- +Just run `make`: + + $ make + +To select keymap: + + $ make KEYMAP=[plain|jis|spacefn|...] + + +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_.c` and see keymap document(you can find in top README.md) and existent keymap files. + + +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) -- cgit v1.2.3