Add serial port names

teensy3/pins_arduino.h

 	return NOT_ON_TIMER;
 }
 
-
+// These serial port names are intended to allow libraries and architecture-neutral
+// sketches to automatically default to the correct port name for a particular type
+// of use. For example, a GPS module would normally connect to SERIAL_PORT_HARDWARE_OPEN,
+// the first hardware serial port whose RX/TX pins are not dedicated to another use.
+//
+// SERIAL_PORT_MONITOR Port which normally prints to the Arduino Serial Monitor
+//
+// SERIAL_PORT_USBVIRTUAL Port which is USB virtual serial
+//
+// SERIAL_PORT_LINUXBRIDGE Port which connects to a Linux system via Bridge library
+//
+// SERIAL_PORT_HARDWARE Hardware serial port, physical RX & TX pins.
+//
+// SERIAL_PORT_HARDWARE_OPEN Hardware serial ports which are open for use. Their RX & TX
+// pins are NOT connected to anything by default.
+//
+#define SERIAL_PORT_MONITOR		Serial
+#define SERIAL_PORT_USBVIRTUAL		Serial
+#define SERIAL_PORT_HARDWARE		Serial1
+#define SERIAL_PORT_HARDWARE1		Serial2
+#define SERIAL_PORT_HARDWARE2		Serial3
+#define SERIAL_PORT_HARDWARE_OPEN	Serial1
+#define SERIAL_PORT_HARDWARE_OPEN1	Serial2
+#define SERIAL_PORT_HARDWARE_OPEN2	Serial3
 
 
 #endif