i i'm working on a mobile robot and i have a problem selecting joystick instead of other controls using procontroll library.





It is very simple; it provide a  scanning of procontroll available peripheals fill an array with them and next you can choose joystick
there is only a problem...
it doesn't work

can someone help me ?

this is the sketch

1. //declare name
   ControllIO controll;
   
   //declare button name
   ControllButton button0, button1, button2, button3, button4, button5, button6, button7;
   
   //declare axis name
   ControllSlider axisX, axisY, axisZ, rotoZ;
   
   String[] JoyList = new String[0];  // declare an empty string for controls list
   
    i=0;
     while(i< controll.list().length)
     {
        JoyList = (append(JoyList, controll.list()[i]));
       i++;
     }
   
   // print joystick list
       StandardFont();
         textAlign(LEFT);
         text("Available Controls:",Z(800),Z(480));
         for(i=0;i<(joyList.length);i++)
         {
           if (i == Joystick)
           {
             fill(0,100,255);
           }
           else
           {
             fill(255,255,255);
           }
           text(i + " = " + JoyList[i],Z(810),Z(500) + (i*20));
         }
   
   // takes joystick and check it
   
   Joystick = RangeCheckInt(controll.getDevice(),0,JoyList.length);
   ....
   joystick = new controll(this, Z(745), Z(558), controll.getDevice("joystick") 30);