using System;
using System.Runtime.InteropServices;
using System.Text;

namespace BaseStationPDA
{
 class GPS
 {

  public string PortNum;
  public int BaudRate;
  public byte ByteSize;
  public byte Parity; // 0-4=no,odd,even,mark,space
  public byte StopBits; // 0,1,2 = 1, 1.5, 2
  public int ReadTimeout;
 
  //comm port win32 file handle
  private int hComm = -1;
 
  public bool Opened = false;
  
  //win32 api constants
  private const uint GENERIC_READ = 0x80000000;
  private const uint GENERIC_WRITE = 0x40000000;
  private const int OPEN_EXISTING = 3; 
  private const int INVALID_HANDLE_VALUE = -1;
 
  [StructLayout(LayoutKind.Sequential)]
   public struct DCB
  {
   //taken from c struct in platform sdk
   public int DCBlength;           // sizeof(DCB)
   public int BaudRate;            // 指定当前波特率 current baud rate
   // these are the c struct bit fields, bit twiddle flag to set
   public int fBinary;          // 指定是否允许二进制模式,在windows95中必须主TRUE binary mode, no EOF check
   public int fParity;          // 指定是否允许奇偶校验 enable parity checking
   public int fOutxCtsFlow;      //

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在google里搜索更多用C＃读取GPS数据的基类，适用于wince操作系统

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