.Net Micro Framework研究—模拟器改造

       试验平台：.Net Micro Framework 模拟器由于Digi提供的开发板没有LCD显示屏，所以有关绘图方面的操作，只好在模拟器上进行了。如果大家参加了9月18日在北京召开的.Net Micro Framework2007技术大会，并且耐心等到最后，大会的礼品U盘里就有.Net Micro Framework的开发包。不过微软这方面对.Net Micro Framework更新很快，如果你到网站上下载，最新的.Net Micro Framework SDK2.0 SP1已经发布了。下载链接：http://www.microsoft.com/downloads/details.aspx?familyid=32f5df20-6c95-4fe8-a76c-0ed56a839ad2&displaylang=en 如果你用的是大会优盘的开发包，你会发现，微软真是萝卜快了不洗泥，模拟器不仅粗糙，而且按钮并没有完全拉开，下半截的按钮的圆弧不见了（可参见我以前写的文章：http://blog.csdn.net/yefanqiu/archive/2007/09/18/1790404.aspx）。如果你下载最新的开放包，这个问题已经解决了（看来微软的战略就是快速抢占市场，问题以后在一一修补）。无论怎样模拟器还是非常难看，估计n个版本之后，才能推出很漂亮的模拟器。正好微软SDK开发包中，有模拟器外壳的开发程序，所以练练手，给.Net Micro Framework武装一个“顶级模拟器”。下面就是我开发的模拟器（应该称外壳）和微软自带的模拟器比较图，我们先睹为快，接下来我就说说是如何做的。 

（图：MF071030001.jpg）        .Net Micro Framework SDK中的示例程序里就有一个模拟器外壳开发程序，也就是“SampleEmulator”示例程序，它是一个典型的C#程序（只不过引用了与.Net Micro Framework相关的几个库），你编译成功后，直接运行，它会弹出下面的提示框。          

    （图：MF071030004.jpg）    其实它是需要输入如下命令行参数的：    "/load:%ProgramFiles%/Microsoft .NET Micro Framework/v2.0.3036/Assemblies/Microsoft.SPOT.TinyCore.pe" "/load:%ProgramFiles%/Microsoft .NET Micro Framework/v2.0.3036/Assemblies/Microsoft.SPOT.Hardware.pe" "/load:../../../../TemperatureSample/TemperatureSample/bin/Debug/TemperatureSample.pe" "/load:%ProgramFiles%/Microsoft .NET Micro Framework/v2.0.3036/Assemblies/Microsoft.SPOT.Graphics.pe" "/load:%ProgramFiles%/Microsoft .NET Micro Framework/v2.0.3036/Assemblies/mscorlib.pe" "/load:%ProgramFiles%/Microsoft .NET Micro Framework/v2.0.3036/Assemblies/Microsoft.SPOT.Native.pe"            我们先不管这些，我们希望以后.Net Micro Framework程序运行的时候，加载的是我们的模拟器，所以我们要找出系统模拟器的位置，功夫不负有心人，竟然在这个位置：     C:/Program Files/Microsoft .NET Micro Framework/v2.0.3036/Tools     文件名：Microsoft.SPOT.Emulator.Sample.SampleEmulator.exe     把我们编译好的模拟器程序（最好先和系统自带的有所不同）覆盖掉该程序，运行其它程序试试，果然加载的是我们新生成的模拟器。     好了，看看我是如何做的。     其实，微软提供的模拟器外壳程序比较复杂（具体代码请下载开发包后自行查看），所以我不仅要换肤，还要对代码重新进行整理。成绩还是斐然的，如button控件，资源图片等等统统去掉了，仅添加了一个imagelist控件，就在窗体函数里实现了该功能。       详细代码如下，有兴趣的朋友自己看。using System;using System.Drawing;using System.Threading;using System.Windows.Forms; using Microsoft.SPOT.Emulator;using Microsoft.SPOT.Hardware;using System.Drawing.Drawing2D; namespace Microsoft.SPOT.Emulator.Sample{    ///     /// This is the UI for the LCD sample    ///     public partial class SampleEmulatorForm : Form    {        Emulator _emulator;        //叶帆添加        Gpio.GpioPort[] _port=new Microsoft.SPOT.Emulator.Gpio.GpioPort[5];        delegate void PortWriteDelegate(bool fState);        int intIndex = 0;        bool[] _pressed = new bool[] {false,false,false,false,false };         public SampleEmulatorForm(Emulator emulator)        {            _emulator = emulator;            // Initializing the component on the UI form            InitializeComponent();        }        protected override void OnLoad(EventArgs e)        {            //Give the buttonCollection focus to allow it to handle keyboard events            //this.buttonCollection.Select();                        base.OnLoad(e);        }        public void OnInitializeComponent()        {            //initialize the lcd control with the lcd emulator component            this.lcdDisplay.LcdDisplay = _emulator.LcdDisplay;             //叶帆添加            _port[0] = _emulator.FindComponentById("Pin_Select") as Gpio.GpioPort;            _port[1] = _emulator.FindComponentById("Pin_Up") as Gpio.GpioPort;            _port[2] = _emulator.FindComponentById("Pin_Left") as Gpio.GpioPort;            _port[3] = _emulator.FindComponentById("Pin_Down") as Gpio.GpioPort;            _port[4] = _emulator.FindComponentById("Pin_Right") as Gpio.GpioPort;        }        //按下叶帆添加        private void picKey_MouseDown(object sender, MouseEventArgs e)        {            //OK            Rectangle rect = new Rectangle(31, 40, 70, 50);            intIndex = 0;                   if (rect.Contains(e.X, e.Y))            {                intIndex = 0;            }            //UP                     GraphicsPath path = new GraphicsPath();            path.AddPolygon(new Point[] {new Point(0,0),new Point(129,0),new Point(100,40),new Point(30,40) });            if (path.IsVisible(e.X, e.Y))            {                intIndex = 1;            }            //LEFT            path.Reset();            path.AddPolygon(new Point[] { new Point(0, 0), new Point(0, 130), new Point(31, 90), new Point(31, 40) });            if (path.IsVisible(e.X, e.Y))            {                intIndex = 2;            }            //DOWN            path.Reset();            path.AddPolygon(new Point[] { new Point(0, 130), new Point(129, 130), new Point(100, 90), new Point(30, 90) });            if (path.IsVisible(e.X, e.Y))            {                intIndex = 3;            }            //RIGHT            path.Reset();            path.AddPolygon(new Point[] { new Point(129, 0), new Point(129, 130), new Point(100, 90), new Point(100, 40) });            if (path.IsVisible(e.X, e.Y))            {                intIndex = 4;            }            picKey.BackgroundImage = imgKey.Images[intIndex+1];            OnButtonStateChanged(intIndex, true);        }        //弹起叶帆添加        private void picKey_MouseUp(object sender, MouseEventArgs e)        {            picKey.BackgroundImage = imgKey.Images[0];            OnButtonStateChanged(intIndex, false);        }        //按下(无法捕捉方向键)        private void SampleEmulatorForm_KeyDown(object sender, KeyEventArgs e)        {        }        //抬起        private void SampleEmulatorForm_KeyUp(object sender, KeyEventArgs e)        {            picKey.BackgroundImage = imgKey.Images[0];            OnButtonStateChanged(intIndex, false);        }        //捕捉方向键        protected override bool ProcessDialogKey(Keys keyData)        {            switch (keyData)            {                case Keys.Enter:                    intIndex = 0;                    break;                case Keys.Up:                    intIndex = 1;                    break;                case Keys.Left:                    intIndex = 2;                    break;                case Keys.Down:                    intIndex = 3;                    break;                case Keys.Right:                    intIndex = 4;                    break;            }            picKey.BackgroundImage = imgKey.Images[intIndex + 1];            OnButtonStateChanged(intIndex, true);            return base.ProcessDialogKey(keyData);        }         //按键状态改变        private void OnButtonStateChanged(int index,bool pressed)        {            if (_port[index] != null)            {                if (_pressed[index] != pressed)                {                    _pressed[index] = pressed;                    bool val = false;                    switch (_port[index].Resistor)                    {                        case Microsoft.SPOT.Emulator.Gpio.GpioResistorMode.Disabled:                        case Microsoft.SPOT.Emulator.Gpio.GpioResistorMode.PullUp:                            val = pressed;                            break;                        case Microsoft.SPOT.Emulator.Gpio.GpioResistorMode.PullDown:                            val = !pressed;                            break;                    }                    //Marshal to MicroFramework thread.                      //No need to wait for a response.  Just post the message                    _port[index].BeginInvoke(new PortWriteDelegate(_port[index].Write), !val);                }            }        }           }} 在下面的网站上，我们还可以下载最新的.Net Micro Framework示例程序，其中“NewPresentation”程序比“Presentation”已高了一个层次，如下图： 

    （图：MF071030002.jpg） 此外这个温度显示的示例程序也不错，我们可以用上下按钮修改温度值，如下图。            

（图：MF071030003.jpg） 新示例下载链接：  http://msdn2.microsoft.com/en-us/embedded/bb267253.aspx    不过总体来说，示例程序还是很简陋的，有时间我自己做一个最炫的（当然网友有做得更好的，别忘了与我分享）。 附录：经典.Net Micro Framework应用欣赏 

     （图：MF071030005.jpg） 我做的模拟器外壳，就是从上图“偷”来的J，不过按钮单击效果倒是费了我不少周折。想想看，用.Net Micro Framework开发MP3/MP4，电子词典该是多么容易和简单，并且效果一定很炫。（上网查了查 Digi核心小模块要$199，几千两银子呢，介入的厂商越多，相信硬件平台一定会越来越便宜的）。 下面是我开发的模拟器下载地址，有兴趣的朋友可以试一试http://download.csdn.net/source/274337