FAT文件系统实现探索

 
//分配内存
internal override void AllocateMemory()
{
        this.ValidateFlashSectorsInternal();
        uint num = 0;
        for (int i = 0; i < this._flashSectors.Length; i++)
        {
            num += this._flashSectors[i].Length;
        }
        base._size = num;
        base.AllocateMemory();    //分配内存 ... ...
        for (int j = 0; j < base._size; j++)
        {
            base._memory[j] = 0xff;
        }
        this.InitializeFlashSectorsInternal();
}
 
//分配内存
internal virtual void AllocateMemory()
{
        this._memory = new byte[this._size];
        this._handle = GCHandle.Alloc(this._memory, 3);

}

    此外模拟器在运行结束时，不能保证执行重载的UninitializeComponent函数，所以无法保存内存的数据，代码如下。
/// <summary>
        /// Called by the emulator after all components were setup and registered
        /// </summary>
        public override void InitializeComponent()
        {
            base.InitializeComponent(); 
            _form = new YFEmulatorForm(this.Emulator);
            _form.OnInitializeComponent();
 
            //Launch the UI thread.
            Thread uiThread = new Thread(RunForm);
            uiThread.SetApartmentState(ApartmentState.STA);
            uiThread.Start();
 
            //读Flash数据
            EmulatorFlashPersistance.Load(this);
 
            //必须添加这句，否则不会执行UninitializeComponent方法
            Application.DoEvents();     //这是我添的
        }
        
       
        /// <summary>
        /// Called by the emulator after the program exits
        /// </summary>
        public override void UninitializeComponent()    //这个函数不能保证会运行
        {
            //保存数据
            EmulatorFlashPersistance.Save(this);        //所以无法保存最后的结果
            Application.DoEvents(); //保存数据 
 
            base.UninitializeComponent();
            //When the Micro Framework is shutting down, inform the the WinForm application 
            //to exit as well.
            Application.Exit();
        }

    目前该工作的开展对我来说，实在是一个不小的挑战。由于国内研究.Net Micro Framework不多，不仅没有人进行深层次的讨论，也少见相关资料，所以.Net Micro Framework推广真是任重而道远啊。

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