add initial framework

usbhid.h

@@ -0,0 +1,16 @@
+#ifndef _USBHID_H
+#define _USBHID_H
+
+
+// HID message size in bytes
+#define HID_MESSAGE_SIZE        64
+
+void usbhid_init();
+
+void usbhid_recv(uint8_t * msg);
+
+void usbhid_send(uint8_t * msg);
+
+void usbhid_close();
+
+#endif