CASE usage

Comments

• Graham Stabler Posts: 2,510

  2006-08-18 19:46 edited 2006-08-18 19:46

  case kb.getkey
        $C0: on_time := on_time - 10 #>14        ' Left arrow (limited to 14 clock cycles min)
        $C1: on_time := on_time + 10             ' Right arrow
        $C2: off_time := off_time + 10           ' Up arrow
        $C3: off_time := off_time - 10 #>57      ' Down arrow (limited to 57 clock cycles min)
  

  
  
  
  This is from the object that produces pulses that I posted:
  
  http://forums.parallax.com/forums/default.aspx?f=25&m=139628
  
  it gets the code for the key pressed using the getkey method and compares it to $C0 to $C3 in turn. If for example the key was the right arrow, kb.getkey would be $C1 and the code "on_time := on_time + 10 " would be run.
  
  Once one of the cases is found to be true no others are checked and it jumps to the next part of the program.
  
  Graham
• Graham Stabler Posts: 2,510

  2006-08-18 19:47 edited 2006-08-18 19:47

  p.s. The #> makes sure that on_time can be no smaller than 14 and the #>57 makes sure the off time can be no smaller than 57.