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 u int GENERIC_READ = 0x80000000;
private const u int 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; // 指定當前波特率 current baud rate // these are the c struct bit fIElds, bit twiddle flag to set public int fBinary; // 指定是否允許二進制模式,在Windows95中必須主TRUE binary mode, no EOF check public int fParity; // 指定是否允許奇偶校驗 enable parity checking public int fOutxCtsFlow; // 指定CTS是否用於檢測發送控制,當為TRUE是CTS為OFF,發送將被掛起. CTS output flow control public int fOutxDsrFlow; // 指定CTS是否用於檢測發送控制 DSR output flow control public int fDtrControl; // DTR_CONTROL_DISABLE值將DTR置為OFF, DTR_CONTROL_ENABLE值將DTR置為ON, DTR_CONTROL_HANDSHAKE允許DTR"握手" DTR flow control type public int fDsrSensitivity; // 當該值為TRUE時DSR為OFF時接收的字節被忽略 DSR sensitivity public int fTXContinueOnXoff; // 指定當接收緩沖區已滿,並且驅動程序已經發送出XoffChar字符時發送是否停止.TRUE時,在接收緩沖區接收到緩沖區已滿的字節XoffLim且驅動程序已經發送出XoffChar字符中止接收字節之後,發送繼續進行. FALSE時,在接收緩沖區接收到代表緩沖區已空的字節XonChar且驅動程序已經發送出恢復發送的XonChar之後,發送繼續進行.XOFF continues Tx public int fOutX; // TRUE時,接收到XoffChar之後便停止發送接收到XonChar之後將重新開始 XON/XOFF out flow control public int fInX; // TRUE時,接收緩沖區接收到代表緩沖區滿的XoffLim之後,XoffChar發送出去接收緩沖區接收到代表緩沖區空的XonLim之後,XonChar發送出去 XON/XOFF in flow control public int fErrorChar; // 該值為TRUE且fParity為TRUE時,用ErrorChar 成員指定的字符代替奇偶校驗錯誤的接收字符 enable error replacement public int fNull; // eTRUE時,接收時去掉空(0值)字節 enable null stripping public int fRtsControl; // RTS flow control /*RTS_CONTROL_DISABLE時,RTS置為OFF RTS_CONTROL_ENABLE時, RTS置為ON RTS_CONTROL_HANDSHAKE時, 當接收緩沖區小於半滿時RTS為ON 當接收緩沖區超過四分之三滿時RTS為OFF RTS_CONTROL_TOGGLE時, 當接收緩沖區仍有剩余字節時RTS為ON ,否則缺省為OFF*/ public int fAbortOnError; // TRUE時,有錯誤發生時中止讀和寫操作 abort on error public int fDummy2; // 未使用 reserved public u int flags;
public ushort wReserved; // 未使用,必須為0 not currently used public ushort XonLim; // 指定在XON字符發送這前接收緩沖區中可允許的最小字節數 transmit XON threshold public ushort XoffLim; // 指定在XOFF字符發送這前接收緩沖區中可允許的最小字節數 transmit XOFF threshold public byte ByteSize; // 指定端口當前使用的數據位 number of bits/byte, 4-8 public byte Parity; // 指定端口當前使用的奇偶校驗方法,可能為:EVENPARITY,MARKPARITY,NOPARITY,ODDPARITY 0-4=no,odd,even,mark,space public byte StopBits; // 指定端口當前使用的停止位數,可能為:ONESTOPBIT,ONE5STOPBITS,TWOSTOPBITS 0,1,2 = 1, 1.5, 2 public char XonChar; // 指定用於發送和接收字符XON的值 Tx and Rx XON character public char XoffChar; // 指定用於發送和接收字符XOFF值 Tx and Rx XOFF character public char ErrorChar; // 本字符用來代替接收到的奇偶校驗發生錯誤時的值 error replacement character public char EofChar; // 當沒有使用二進制模式時,本字符可用來指示數據的結束 end of input character public char EvtChar; // 當接收到此字符時,會產生一個事件 received event character public ushort wReserved1; // 未使用 reserved; do not use } [StructLayout( LayoutKind.Sequential )] private struct COMMTIMEOUTs { public int ReadIntervalTimeout;
public int ReadTotalTimeoutMultiplIEr;
public int ReadTotalTimeoutConstant;
public int WriteTotalTimeoutMultiplIEr;
public int WriteTotalTimeoutConstant; }
[StructLayout( LayoutKind.Sequential )] private struct OVERLAPPED { public int Internal;
public int InternalHigh;
public int Offset;
public int OffsetHigh;
public int hEvent; } [DllImport( "coredll.dll" )] private static extern int CreateFile( string lpFileName, // 要打開的串口名稱 u int dwDesiredAccess, // 指定串口的訪問方式,一般設置為可讀可寫方式 int dwShareMode, // 指定串口的共享模式,串口不能共享,所以設置為0 int lpSecurityAttributes, // 設置串口的安全屬性,WIN9X下不支持,應設為NULL int dwCreationDisposition, // 對於串口通信,創建方式只能為OPEN_EXISTING int dwFlagsAndAttributes, // 指定串口屬性與標志,設置為FILE_FLAG_OVERLAPPED( 重疊I/O操作 ),指定串口以異步方式通信 int hTemplateFile // 對於串口通信必須設置為NULL ); [DllImport( "coredll.dll" )] private static extern bool GetCommState( int hFile, //通信設備句柄 ref DCB lpDCB // 設備控制塊DCB ); [DllImport( "coredll.dll" )] private static extern bool BuildCommDCB( string lpDef, // 設備控制字符串 ref DCB lpDCB // 設備控制塊 ); [DllImport( "coredll.dll" )] private static extern bool SetCommState( int hFile, // 通信設備句柄 ref DCB lpDCB // 設備控制塊 ); [DllImport( "coredll.dll" )] private static extern bool GetCommTimeouts( int hFile, // 通信設備句柄 handle to comm device ref COMMTIMEOUTS lpCommTimeouts // 超時時間 time-out values ); [DllImport( "coredll.dll" )] private static extern bool SetCommTimeouts( int hFile, // 通信設備句柄 handle to comm device ref COMMTIMEOUTS lpCommTimeouts // 超時時間 time-out values ); [DllImport( "coredll.dll" )] private static extern bool ReadFile( int hFile, // 通信設備句柄 handle to file byte[] lpBuffer, // 數據緩沖區 data buffer int nNumberOfBytesToRead, // 多少字節等待讀取 number of bytes to read ref int lpNumberOfBytesRead, // 讀取多少字節 number of bytes read ref OVERLAPPED lpOverlapped // 溢出緩沖區 overlapped buffer ); [DllImport( "coredll.dll" )] private static extern bool WriteFile( int hFile, // 通信設備句柄 handle to file byte[] lpBuffer, // 數據緩沖區 data buffer int nNumberOfBytesToWrite, // 多少字節等待寫入 number of bytes to write ref int lpNumberOfBytesWritten, // 已經寫入多少字節 number of bytes written ref OVERLAPPED lpOverlapped // 溢出緩沖區 overlapped buffer ); [DllImport( "coredll.dll" )] private static extern bool CloseHandle( int hObject // handle to object ); [DllImport( "coredll.dll" )] private static extern u int GetLastError( );
public void Open( ) { DCB dcbCommPort = new DCB( ); COMMTIMEOUTS ctoCommPort = new COMMTIMEOUTS( ); // 打開串口 OPEN THE COMM PORT. hComm = CreateFile( PortNum ,GENERIC_READ | GENERIC_WRITE,0, 0,OPEN_EXISTING,0,0 ); // 如果串口沒有打開,就打開 IF THE PORT CANNOT BE OPENED, BAIL OUT. if( hComm == INVALID_HANDLE_VALUE ) { throw( new ApplicationException( "非法操作,不能打開串口！" ) ); } // 設置通信超時時間 SET THE COMM TIMEOUTS. GetCommTimeouts( hComm,ref ctoCommPort ); ctoCommPort.ReadTotalTimeoutConstant = ReadTimeout; ctoCommPort.ReadTotalTimeoutMultiplIEr = 0; ctoCommPort.WriteTotalTimeoutMultiplIEr = 0; ctoCommPort.WriteTotalTimeoutConstant = 0; SetCommTimeouts( hComm,ref ctoCommPort ); // 設置串口 SET BAUD RATE, PARITY, Word SIZE, AND STOP BITS. GetCommState( hComm, ref dcbCommPort ); dcbCommPort.BaudRate=BaudRate; dcbCommPort.flags=0; //dcb.fBinary=1; dcbCommPort.flags|=1; if ( Parity>0 ) { //dcb.fParity=1 dcbCommPort.flags|=2; } dcbCommPort.Parity=Parity; dcbCommPort.ByteSize=ByteSize; dcbCommPort.StopBits=StopBits; if ( !SetCommState( hComm, ref dcbCommPort ) ) { //u int ErrorNum=GetLastError( ); throw( new ApplicationException( "非法操作,不能打開串口！" ) ); } //unremark to see if setting took correctly //DCB dcbCommPort2 = new DCB( ); //GetCommState( hComm, ref dcbCommPort2 ); Opened = true; }
public void Close( ) { if ( hComm!=INVALID_HANDLE_VALUE ) { CloseHandle( hComm ); } }
public byte[] Read( int NumBytes ) { byte[] BufBytes; byte[] OutBytes; BufBytes = new byte[NumBytes]; if ( hComm!=INVALID_HANDLE_VALUE ) { OVERLAPPED ovlCommPort = new OVERLAPPED( );
