arduinoでps/2 keyboard

概要

arduino leonardoにps/2 キーボードをつないで、usbキーボードをエミュレートしてみた。

写真

回路図

サンプルコード

# include "ps2.h"

# define PS2_TAB				9
# define PS2_ENTER			13
# define PS2_BACKSPACE		127
# define PS2_ESC				27
# define PS2_INSERT			0
# define PS2_DELETE			127
# define PS2_HOME			0
# define PS2_END				0
# define PS2_SCROLL			0
PS2 kbd(6, 5);
char key[140] = {
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, PS2_TAB, '`', 0,
	0, 0, 0, 0, 0, 'q', '1', 0,
	0, 0, 'z', 's', 'a', 'w', '2', 0,
	0, 'c', 'x', 'd', 'e', '4', '3', 0,
	0, ' ', 'v', 'f', 't', 'r', '5', 0,
	0, 'n', 'b', 'h', 'g', 'y', '6', 0,
	0, 0, 'm', 'j', 'u', '7', '8', 0,
	0, ',', 'k', 'i', 'o', '0', '9', 0,
	0, '.', '/', 'l', ';', 'p', '-', 0,
	0, 0, '\'', 0, '[', '=', 0, 0,
	0, 0, PS2_ENTER, ']', 0, '\\', 0, 0,
	0, 0, 0, 0, 0, 0, PS2_BACKSPACE, 0,
	0, '1', 0, '4', '7', 0, 0, 0,
	'0', '.', '2', '5', '6', '8', PS2_ESC, 0,
	0, '+', '3', '-', '*', '9', PS2_SCROLL, 0,
	0, 0, 0, 0
};
void kbd_init()
{
	char ack;
	kbd.write(0xff);
	ack = kbd.read();
	ack = kbd.read();
}
void setup()
{
	Serial.begin(115200);
	while (!Serial);
	Serial.println("Start");
	kbd_init();
	Keyboard.begin();
	Serial.println("OK");
}
void loop()
{
	unsigned char code;
	for ( ; ; )
	{
		code = kbd.read();
		code = key[code];
		Serial.println(code, HEX);
		Keyboard.print((char) code);
		code = kbd.read();
		code = kbd.read();
	}
}