Add unused detect pin to shifter examples

Matches the layout of the G25 and G27 examples, and shows the user that this feature is available even if it requires extra hardware.

Author: dmadison

examples/Shifter/LogitechShifter/LogitechShifter_Joystick/LogitechShifter_Joystick.ino

@@ -48,7 +48,15 @@ const int Pin_ShifterX   = A0;  // DE-9 pin 4
 const int Pin_ShifterY   = A2;  // DE-9 pin 8
 const int Pin_ShifterRev = 2;   // DE-9 pin 2
 
-SimRacing::LogitechShifter shifter(Pin_ShifterX, Pin_ShifterY, Pin_ShifterRev);
+// This pin requires an extra resistor! If you have made the proper
+// connections, change the pin number to the one you're using
+const int Pin_ShifterDetect = SimRacing::UnusedPin;  // DE-9 pin 7, requires pull-down resistor
+
+SimRacing::LogitechShifter shifter(
+	Pin_ShifterX, Pin_ShifterY,
+	Pin_ShifterRev,
+	Pin_ShifterDetect
+);
 //SimRacing::LogitechShifter shifter = SimRacing::CreateShieldObject<SimRacing::LogitechShifter, 2>();
 
 const int Gears[] = { 1, 2, 3, 4, 5, 6, -1 };

examples/Shifter/LogitechShifter/LogitechShifter_Print/LogitechShifter_Print.ino

@@ -35,7 +35,15 @@ const int Pin_ShifterX   = A0;  // DE-9 pin 4
 const int Pin_ShifterY   = A2;  // DE-9 pin 8
 const int Pin_ShifterRev = 2;   // DE-9 pin 2
 
-SimRacing::LogitechShifter shifter(Pin_ShifterX, Pin_ShifterY, Pin_ShifterRev);
+// This pin requires an extra resistor! If you have made the proper
+// connections, change the pin number to the one you're using
+const int Pin_ShifterDetect = SimRacing::UnusedPin;  // DE-9 pin 7, requires pull-down resistor
+
+SimRacing::LogitechShifter shifter(
+	Pin_ShifterX, Pin_ShifterY,
+	Pin_ShifterRev,
+	Pin_ShifterDetect
+);
 //SimRacing::LogitechShifter shifter = SimRacing::CreateShieldObject<SimRacing::LogitechShifter, 2>();
 
 const unsigned long PrintSpeed = 1500;  // ms