added protocol stack: pjrc, vusb

pjrc/usb_debug.h

@@ -0,0 +1,19 @@
+#ifndef USB_DEBUG_H
+#define  USB_DEBUG_H 1
+
+#include <stdint.h>
+#include "usb.h"
+
+
+#define DEBUG_INTERFACE		2
+#define DEBUG_TX_ENDPOINT	3
+#define DEBUG_TX_SIZE		32
+#define DEBUG_TX_BUFFER		EP_DOUBLE_BUFFER
+
+
+extern volatile uint8_t debug_flush_timer;
+
+
+void usb_debug_flush_output(void);	// immediately transmit any buffered output
+
+#endif