4 replies to this topic

[nlsa]

Dear friends,

 

I want to detect both ON and OFF states of a GPIO pin by means of interrupts.  Ideally, this would involve one event handler for ON (triggered by InterruptMode.InterruptEdgeLevelHigh) and a separate handler for  OFF (InterruptMode.InterruptEdgeLevelLow).  I looks like Netduino doesn't allow attaching two handlers to one pin.  Port.InterruptMode.InterruptEdgeBoth might work but then how would I know whether the pin went high or low?

 

Suggestions?

[Juzzer]

using System;

using System.Threading;

using Microsoft.SPOT;

using Microsoft.SPOT.Hardware;

using StmHelper;

 

namespace MFConsoleApplication1

{

    public class Program

    {

        private static InterruptPort _pin;

        

        public static void Main()

        {

            _pin = new InterruptPort(Pin.PC1,true,Port.ResistorMode.PullUp,Port.InterruptMode.InterruptEdgeBoth);

            _pin.OnInterrupt += pin_OnInterrupt;

            Thread.Sleep(Timeout.Infinite);

        }

 

        static void pin_OnInterrupt(uint data1, uint data2, DateTime time)

        {

            PinState buttonState = _pin.Read() ? PinState.Off : PinState.On;

            switch (buttonState)

            {

                case PinState.Off:

                   Debug.Print("Off");

                    break;

                case PinState.On:

                   Debug.Print("On");

                    break;

            }

        }

    }

    public enum PinState

    {

        Off = 0,

        On = 1

    }

}

[nlsa]

Thanks for the quick reply.  I should have thought about reading the pin itself... makes perfect sense.

[nlsa]

As far as I can tell, PinState is not well documented.  Try Googling Netduino PimState and you'll see what I mean.

[nlsa]

Oh, Lord, please let me take back that last post.