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• Flashing lights example try 4 not working

  @nglod started

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  @Gordon replied
• Flashing lights example try 4 not working

  in JavaScript • 10 years, 11 months

  

  Hello,

  I just received my espruinos and started typing a few examples.
  I have upgraded the firmware as explained in the quick start guide and I am following this tutorial: http://www.espruino.com/Flashing+Lights
  The code under "try 4" is not working as expected:

  Pin.prototype.startFlashing = function(period) { 
    var on = false;
    setInterval(function() {
      on = !on;
      digitalWrite(this, on);
    }, period);
  }
  LED1.startFlashing(100);
  

  On the console I can read "ERROR: Invalid pin!". There seems to be a problem handling "this", in fact the issue seems to be the same as in this other forum post: http://forum.espruino.com/conversations/389/

  The code works fine with the following modification:

  Pin.prototype.startFlashing = function(period) {
    var me = this;
    var on = false;
    setInterval(function() {
      on = !on;
      digitalWrite(me, on);
    }, period);
  }
  
  LED1.startFlashing(100);
  

  Just letting you know, I don't know this should be considered a bug in the code or in the documentation.

  Thanks a lot!