public partial class Form1 : Form {
public Form1() {
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e) {
backgroundWorker1.RunWorkerAsync();
}
private void backgroundWorker1_DoWork(object sender, System.ComponentModel.DoWorkEventArgs e) {
// 类BootModeIntegOpr是从COM组件的tlb中导出的
BootModeIntegOpr bootModePlatFormHandler = new BootModeIntegOpr();
byte[] buffer =File.ReadAllBytes("test.bin");
BootModeFile file = new BootModeFile();
file.Length = buffer.Length;
file.Address = (int)0x30000000;
file.Data = Marshal.AllocCoTaskMem(file.Length);
Marshal.Copy(buffer, 0, file.Data, file.Length);
file.MaxLength = 0x800;
ptr = ToIntPtr(file);
<em><span style="text-decoration:underline"><strong>result = bootModePlatFormHandler.Download(ptr.ToInt32());
</strong></span></em> if (result == 0) {
Marshal.ThrowExceptionForHR(Marshal.GetHRForLastWin32Error());
}
Marshal.FreeCoTaskMem(file.Data);
Marshal.FreeCoTaskMem(ptr);
}
private static IntPtr ToIntPtr(object o) {
IntPtr ptr = Marshal.AllocCoTaskMem(Marshal.SizeOf(o));
Marshal.StructureToPtr(o, ptr, true);
return ptr;
}
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
internal struct BootModeFile {
/// <summary>
/// 文件长度
/// </summary>
internal int Length;
/// <summary>
/// 下载地址
/// </summary>
internal int Address;
internal IntPtr Data;
internal int BufferLength;
/// <summary>
/// 文件类型
/// </summary>
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)]
internal string Type;
/// <summary>
/// 文件名
/// </summary>
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)]
internal string Name;
/// <summary>
/// 缓冲内容是否来自于文件
/// </summary>
internal bool FromFile;
/// <summary>
/// 一次操作的最大长度
/// </summary>
internal int MaxLength;
internal IntPtr FDLCode;
internal IntPtr FDLCodeMapView;
/// <summary>
/// 是否改变缓冲区中的内容
/// </summary>
internal bool IsChanged;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)]
internal string Id;
}
}
}
代码中result = bootModePlatFormHandler.Download(ptr.ToInt32());就是大量数据从串口中通过，也是这一句导致同进程中其它所有线程阻塞。
