/test/Platform/PortingKits/Training3.0/dot_net_micro_framework_v2_0_rtm/Product/Sample/ButtonLib/GPIOButtonInputProvider.cs

//-----------------------------------------------------------------------------

//  Microsoft SPOT Project

//  Copyright (c) 2001,2002,2004,2005 Microsoft Corporation

//  One Microsoft Way, Redmond, Washington 98052-6399 U.S.A.

//  All rights reserved.

//  MICROSOFT CONFIDENTIAL

//-----------------------------------------------------------------------------



using System;

using Microsoft.SPOT;

using Microsoft.SPOT.Input;

using Microsoft.SPOT.Hardware;

using Microsoft.SPOT.Presentation;

using Microsoft.SPOT.Hardware.FreescaleCSB536MS;



//

//  This class should be defined on a per-OEM basis based on their hardware behavior.

//





namespace Microsoft.SPOT.Sample

{

    public sealed class GPIOButtonInputProvider

    {

        internal class ButtonPad

        {

            public ButtonPad(GPIOButtonInputProvider sink, Button button, Cpu.Pin pin, Port.InterruptMode mode)

            {

                _sink     = sink;

                _button   = button;



                _port     = new InterruptPort(pin, true, ResistorMode.PullUp, mode);



                _port.OnInterrupt += new GPIOInterruptEventHandler(this.Interrupt);

            }



            void Interrupt(Cpu.Pin port, bool state, TimeSpan time)

            {

                // queue the button press to the input provider site.

                _sink.Dispatcher.BeginInvoke(_sink._callback, new RawButtonInputReport(_sink._source, time, _button, state?RawButtonActions.ButtonUp:RawButtonActions.ButtonDown));

            }



            Button                      _button;

            InterruptPort               _port;

            GPIOButtonInputProvider     _sink;

        }



        public GPIOButtonInputProvider(PresentationSource source)

        {

            _source   = source;

            _site     = InputManager.CurrentInputManager.RegisterInputProvider(this);

            _callback = new ReportInputCallback(_site.ReportInput);

            Dispatcher = Dispatcher.CurrentDispatcher;



            ButtonPad[] buttons = new ButtonPad[]

            {

                new ButtonPad(this, Button.Menu,   Pins.GPIO_PORT_A_3, InterruptMode.InterruptEdgeBoth),

                new ButtonPad(this, Button.Select, Pins.GPIO_PORT_A_8, InterruptMode.InterruptEdgeBoth),

                new ButtonPad(this, Button.Left,   Pins.GPIO_PORT_A_7, InterruptMode.InterruptEdgeBoth),

                new ButtonPad(this, Button.Right,  Pins.GPIO_PORT_A_5, InterruptMode.InterruptEdgeBoth),

                new ButtonPad(this, Button.Up,     Pins.GPIO_PORT_A_4, InterruptMode.InterruptEdgeBoth),

                new ButtonPad(this, Button.Down,   Pins.GPIO_PORT_A_6, InterruptMode.InterruptEdgeBoth),

                };



            _buttons = buttons;

        }



        public  readonly Dispatcher Dispatcher;



        private ButtonPad[]         _buttons;

        private ReportInputCallback _callback;

        private InputProviderSite   _site;

        private PresentationSource  _source;



        private delegate bool ReportInputCallback(InputReport inputReport);

    }

}