Maint/add img

README.md

@@ -6,3 +6,32 @@ An interface node to allow control of the PACMod system with a game controller
 that is represented in ROS by a Joy node.
 
 For more information, see the [ROS Wiki](http://wiki.ros.org/pacmod_game_control).
+
+Please see [PACMod3 readme](https://github.com/astuff/pacmod3/blob/master/README.md) to use correct version of driver for a vehicle.
+
+![Left: Front Layout of logitech Controller; Right: Side-button layout of logitech controller
+](/controller_img.png "controller_img.png")
+
+| Button | Action | Notes |
+| - | - | - |
+| **Directional Pad (left-hand side)** | **Headlights and Turn Signals** | |
+| Up | Headlights | Some vehicles only |
+| Left | Left turn signal | |
+| Right | Right turn signal | |
+| Down | Hazards | Some vehicles only |
+| **Button Pad (right-hand side)** | **Gear Selection** | |
+| A | Drive | |
+| B | Reverse | |
+| X | Neutral | |
+| Y | Park | |
+| **Center region** | | |
+| Back | Enable/Disable | 'Back' and 'Start' buttons must be pressed simultaneously to enable by-wire mode. 'Back' button must be pressed to disable by-wire mode.|
+| Start | Enable | 'Back' and 'Start' buttons must be pressed simultaneously to enable by-wire mode.|
+| Mode | Not supported | Do not use. Mode light should be OFF at all times. Pressing mode button will change button mapping.|
+| **Joystick** | **Steering** | **Joystick click buttons unused** |
+| Left joystick | Steering | Steering defaults to left joystick, but can be set to right joystick by operator. |
+| Right joystick | Steering | Only if set by operator; steering defaults to left joystick |
+| Left bumper | Wipers | Some vehicles only |
+| Left trigger | Brake | |
+| Right bumper | Horn | Some vehicles only |
+| Right trigger | Throttle | |