add mouse function.

usb_mouse.h

@@ -0,0 +1,20 @@
+#ifndef USB_MOUSE_H
+#define  USB_MOUSE_H 1
+
+#include <stdint.h>
+#include "usb.h"
+
+
+#define MOUSE_INTERFACE		1
+#define MOUSE_ENDPOINT		2
+#define MOUSE_SIZE		8
+#define MOUSE_BUFFER		EP_DOUBLE_BUFFER
+
+extern uint8_t mouse_buttons;
+extern uint8_t mouse_protocol;
+
+
+int8_t usb_mouse_buttons(uint8_t left, uint8_t middle, uint8_t right);
+int8_t usb_mouse_move(int8_t x, int8_t y, int8_t wheel);
+
+#endif