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--- getting_started:tutorials:hal2 [2017/04/22 17:33] – graf
+++ getting_started:tutorials:hal2 [2017/05/03 07:39] – graf
@@ Line 1: / Line 1: @@
 ====== Reading from a Mouse ======
 In the EEROS library you will find a directory with examples. Open a shell in the build directory of your EEROS library and run ''examples/controlsystem/mouseTest''.
-This examples does reads and outputs periodically all 8 buttons and 8 axis of a XBox controller. If you connect several such controller you have to check in ''/dev/input/'' for the controller of your choice and adapt the program accordingly.
+This examples reads four axis of a mouse together with three buttons and outputs the results periodically. Further, the safety system checks for the middle button to be pressed. This causes a level change. As soon as the button is released the safety system changes back to the first level.\\
+In order to read from the proper mouse events you can install and run the ''evtest'' program.
+<code>
+$ sudo apt-get install evtest
+$ sudo evtest
+</code>
+This programm will list all connected devices together with the associated event number. Please adapt the program accordingly. It might be necessary to run it with root priveledges.