+//CC2420 signals
+#define SFD (P4IN&BIT1)
+#define FIFOP (P1IN&BIT0)
+#define FIFO (P1IN&BIT3)
+
+//GPIO Expansion Pins
+#define GIO0 (P2OUT&BIT0)
+#define GIO0HIGH P2OUT|=BIT0
+#define GIO0LOW P2OUT&=~BIT0
+#define GIO0OUT P2OUT
+#define GIO0DIR P2DIR
+#define GIO0PIN BIT0