C#写SPI通信应用程序问题

Afeila · 发表于 2013-12-5 19:34:31

前几天刚要了TQ210的板子，想写个SPI通信应用程序，但是连SPI的驱动都打不开，也是显示"打开SPI驱动失败！”信息，不知是什么问题！
附上代码：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices; 

namespace SpiTest
{
public partial class MainForm : Form
{

      public const int GENERIC_ALL = 0x10000000;
      public const int GENERIC_EXECUTE = 0x20000000;
      public const uint GENERIC_READ = 0x80000000;
      public const int GENERIC_WRITE = 0x40000000;
      public const int FILE_SHARE_READ = 1;
      public const int FILE_SHARE_WRITE = 2;
      public const int OPEN_EXISTING = 3;
      public IntPtr INVALID_HANDLE_VALUE = new IntPtr(-1);
      [StructLayout(LayoutKind.Sequential)]
      public struct SECURITY_ATTRIBUTES
      {
         public int nLength;
         public IntPtr lpSecurityDescriptor;
         public int bInheritHandle;
      }
      public struct OVERLAPPED
      {
         public UIntPtr Internal;
         public UIntPtr InternalHigh;
         public uint Offset;
         public uint OffsetHigh;
         public IntPtr EventHandle;
      }

      //对设备执行指定的操作,访问设备驱动程序
      [DllImport("coredll.dll", EntryPoint = "DeviceIoControl", SetLastError = true)]
      private static extern int DeviceIoControl
      (
         IntPtr hDevice,//设备句柄
         int dwIoControlCode,//设备控制选项，带有 FSCTL_ 前缀的常数
         IntPtr lpInBuffer,//设备控制选项，具体取决于dwIoControlCode参数
         uint nInBufferSize,//输入缓冲区的长度
         IntPtr lpOutBuffer,//设备控制选项，具体取决于dwIoControlCode参数
         uint nOutBufferSize,//输出缓冲区的长度
         ref int lpBytesReturned,//实际装载到输出缓冲区的字节数量
         IntPtr lpOverlapped//重叠指针
      );

      //对设备执行指定的操作,关闭设备驱动程序
      [DllImport("coredll.dll", EntryPoint = "CloseHandle")]
      private static extern int CloseHandle
      (
         IntPtr hDevice//设备句柄
      );

      //创建或打开对象，并返回一个可被对象访问的句柄
      [DllImport("coredll.dll")]
      private static extern IntPtr CreateFile(
         string lpFileName,// 要打开的串口名称
         uint dwDesiredAccess,// 指定串口的访问方式,一般设置为可读可写方式
         int dwShareMode,// 指定串口的共享模式,串口不能共享,所以设置为0
         int lpSecurityAttributes,// 设置串口的安全属性,WIN9X下不支持,应设为NULL
         int dwCreationDisposition,// 对于串口通信,创建方式只能为OPEN_EXISTING
         int dwFlagsAndAttributes, // 指定串口属性与标志,设置为FILE_FLAG_OVERLAPPED( 重叠I/O操作 ),指定串口以异步方式通信
         int hTemplateFile// 对于串口通信必须设置为NULL
      );

      [DllImport("coredll.dll")]
      private static extern bool ReadFile(
         int hFile, // 通信设备句柄 handle to file
         byte[] lpBuffer, // 数据缓冲区 data buffer
         int nNumberOfBytesToRead, // 多少字节等待读取 number of bytes to read
         ref int lpNumberOfBytesRead, // 读取多少字节 number of bytes read
         ref OVERLAPPED lpOverlapped // 溢出缓冲区 overlapped buffer
         );
      [DllImport("coredll.dll")]
      private static extern bool WriteFile(
         int hFile, // 通信设备句柄 handle to file
         byte[] lpBuffer, // 数据缓冲区 data buffer
         int nNumberOfBytesToWrite, // 多少字节等待写入 number of bytes to write
         ref int lpNumberOfBytesWritten, // 已经写入多少字节 number of bytes written
         ref OVERLAPPED lpOverlapped // 溢出缓冲区 overlapped buffer
         );

      private IntPtr hFile;

      public MainForm()
      {
         InitializeComponent();
      }

      private void btOpen_Click(object sender, EventArgs e)
      {

         hFile = CreateFile("SPI1:", GENERIC_READ | GENERIC_WRITE, 0, 0, OPEN_EXISTING, 0, 0);

         if(hFile==INVALID_HANDLE_VALUE)
         {
            MessageBox.Show("打开SPI驱动失败！");//
            return;
         }
         else
         {
            MessageBox.Show("打开SPI驱动成功！");

         }
      }
}
}