added protocol stack: pjrc, vusb

pjrc/usb_extra.h

@@ -0,0 +1,34 @@
+#ifndef USB_EXTRA_H
+#define  USB_EXTRA_H 1
+/*
+ * Enhanced keyboard features for Windows:
+ * Audio control and System control
+ *
+ * http://www.microsoft.com/whdc/archive/w2kbd.mspx
+ */
+
+#include <stdint.h>
+#include "usb.h"
+
+
+#define EXTRA_INTERFACE		3
+#define EXTRA_ENDPOINT		4
+#define EXTRA_SIZE		2
+#define EXTRA_BUFFER		EP_DOUBLE_BUFFER
+
+
+// Consumer Page(0x0C) Consumer Control(0x01)
+#define AUDIO_VOL_UP		(1<<0)
+#define AUDIO_VOL_DOWN		(1<<1)
+#define AUDIO_MUTE		(1<<2)
+
+// Generic Desktop Page(0x01) System Control(0x80)
+#define SYSTEM_POWER_DOWN	(1<<0)
+#define SYSTEM_SLEEP		(1<<1)
+#define SYSTEM_WAKE_UP		(1<<2)
+
+
+int8_t usb_extra_audio_send(uint8_t bits);
+int8_t usb_extra_system_send(uint8_t bits);
+
+#endif