Clean-up and refactor examples/Check_inputs

examples/Tools/Check_Inputs/Check_Inputs.ino

@@ -0,0 +1,42 @@
+/* This example allows the user to read the
+ * inputs of the Braccio++ shield UI devices:
+ * - joystick (up,down,left,right,select)
+ * - button (enter)
+ */
+
+#include <Braccio++.h>
+
+String toMessage(int const input)
+{
+  static String const message[] =
+  { "",
+    "LEFT   (Joystick)",
+    "RIGHT  (Joystick)",
+    "SELECT (Joystick)",
+    "UP     (Joystick)",
+    "DOWN   (Joystick)",
+    "ENTER  (Button)"
+  };
+
+  if (input < 7)
+    return message[input];
+  else
+    return String("Error, invalid input value");
+}
+
+void setup()
+{
+  Serial.begin(115200);
+  while(!Serial){}
+
+  Braccio.begin();
+  Serial.println("Press any button or move the joystick.");
+}
+
+void loop()
+{
+  String const message = toMessage(Braccio.getKey());
+  if(message != "")
+    Serial.println(message);
+  delay(100);
+}