dumped all my old arduino stuff in here.

ps2_mouse/ps2_mouse.pde

@@ -0,0 +1,52 @@
+#include <ps2.h>
+
+/*
+ * an arduino sketch to interface with a ps/2 mouse.
+ * Also uses serial protocol to talk back to the host
+ * and report what it finds.
+ */
+
+/*
+ * Pin 5 is the mouse data pin, pin 6 is the clock pin
+ * Feel free to use whatever pins are convenient.
+ */
+PS2 mouse(6, 5);
+
+/*
+ * initialize the mouse. Reset it, and place it into remote
+ * mode, so we can get the encoder data on demand.
+ */
+
+
+void setup()
+{
+  Serial.begin(9600);
+  mouse.init_mouse();
+}
+
+/*
+ * get a reading from the mouse and report it back to the
+ * host via the serial line.
+ */
+void loop()
+{
+  char mstat;
+  char mx;
+  char my;
+
+  /* get a reading from the mouse */
+  mouse.write(0xeb);  // give me data!
+  mouse.read();      // ignore ack
+  mstat = mouse.read();
+  mx = mouse.read();
+  my = mouse.read();
+
+  /* send the data back up */
+  Serial.print(mstat, BIN);
+  Serial.print("\tX=");
+  Serial.print(mx, DEC);
+  Serial.print("\tY=");
+  Serial.print(my, DEC);
+  Serial.println();
+  delay(20);  /* twiddle */
+}