Add current version of mbed code as stored at mbed.org

mbed/PS2Keyboard.cpp

@@ -0,0 +1,18 @@
+#include "PS2Keyboard.h"
+
+PS2Keyboard::PS2Keyboard() : _ps2clk(p12), _ps2din(p11) { }
+
+unsigned char PS2Keyboard::read(void) {
+    unsigned int buf = 0x00;
+    _ps2clk = 0;
+    _ps2clk.input();
+    for (int i = 0; i < 11; i++) {
+	while (_ps2clk);
+	while (!_ps2clk);
+	buf = buf >> 1;
+	buf |= _ps2din ? 512 : 0;
+    }
+    _ps2clk.output();
+    buf &= 0xFF;
+    return ps2KeyMap[buf];
+}