[#NETMF] HowTo: Change the color of a LED with a Timer and a Button

Buenas

today’s example is a little more complicated than a Hello World, but you gives more joys. It’s used a button and a multi-color LED to change the color of it with a timer.

In this example we will use

Fez Spider Mainboard
http://savecomm.net/p/53/fez-spider-starter-kit
USB Client DP
http://www.netmf.com/showcase.aspx?ShowcaseID=1 & id = 110
Smart Multi Color Led Module
http://www.ghielectronics.com/catalog/product/272
Button Module
http://www.ghielectronics.com/catalog/product/274

with the following diagram

And again, with less than 50 lines of code source we can deploy our application.

   1: using Gadgeteer.Modules.GHIElectronics;

   2: using GT = Gadgeteer;

3:

   4: namespace GadgeteerApp5

   5: {

   6:     public partial class Program

   7:     {

   8:         private GT.Timer _timer;

9:

  10:         void ProgramStarted()

  11:         {

  12:             button.ButtonPressed += ButtonButtonPressed;

  13:             _timer = new GT.Timer(1000);

  14:             _timer.Tick += TimerTick;

  15:         }

16:

  17:         void ButtonButtonPressed(Button sender, Button.ButtonState state)

  18:         {

  19:             if (!_timer.IsRunning)

  20:             {

  21:                 _timer.Start();

  22:             }

  23:             else

  24:             {

  25:                 _timer.Stop();

  26:                 multicolorLed.TurnOff();

  27:             }

  28:         }

29:

  30:         private void TimerTick(GT.Timer timer)

  31:         {

  32:             var color = multicolorLed.GetCurrentColor();

33:

  34:             if (color == GT.Color.Blue)

  35:             {

  36:                 color = GT.Color.Green;

  37:             }

  38:             else if (color == GT.Color.Green)

  39:             {

  40:                 color = GT.Color.Red;

  41:             }

  42:             else

  43:             {

  44:                 color = GT.Color.Blue;

  45:             }

46:

  47:             multicolorLed.TurnColor(color);

  48:         }

  49:     }

  50: }

Interesting application data

Line 13, special implementation of timer for.Net Gadgeteer. Or try to use the timer of. Net, you will die between terrible suffering
Line 19, in the implementation of the button, the Timer starts and shuts off the LED when the timer is stopped
Line 29, shows how simple that is to use LEDs, a GetCurrentColor() to get the current color and then a TurnColor() to set the color of the LED

The video http://www.youtube.com/watch?feature=player_embedded&v=yEwqQTdRc2c

Saludos @ La Finca

El Bruno