wince串口通讯.rar

// Serial.cpp: implementation of the CSerial class. // ////////////////////////////////////////////////////////////////////// #include "stdafx.h" #include "resource.h" #include "CSerial.h" ////////////////////////////////////////////////////////////////////// // Construction/Destruction ////////////////////////////////////////////////////////////////////// CSerial::CSerial() { m_hIDComDev = NULL; m_bOpened = FALSE; } CSerial::~CSerial() { PortClose(); } BOOL CSerial::Open( int nPort, int nBaud ) { if( m_bOpened ) return( TRUE ); TCHAR szPort[15]; DCB dcb; wsprintf( szPort, _T("COM%d:"), nPort ); m_hIDComDev = CreateFile( szPort, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL ); if( m_hIDComDev == INVALID_HANDLE_VALUE) { DWORD dwError=GetLastError(); //::MessageBox(0,_T("打开端口出错！请确定端口设备的使用情况后关闭重试."),_T("ERROR!"),MB_OK ); return( FALSE ); } else { m_bOpened = TRUE; } // Change the CommTimeOuts structure settings. COMMTIMEOUTS CommTimeOuts; GetCommTimeouts (szPort, &CommTimeOuts); CommTimeOuts.ReadIntervalTimeout = MAXDWORD; CommTimeOuts.ReadTotalTimeoutMultiplier = 0; CommTimeOuts.ReadTotalTimeoutConstant = 0; CommTimeOuts.WriteTotalTimeoutMultiplier = 0; CommTimeOuts.WriteTotalTimeoutConstant = 0; if(!SetCommTimeouts( m_hIDComDev, &CommTimeOuts )) { //could not creatthe read thread; //::MessageBox (NULL,_T("不能设置延时参数"),_T("ERROR"),MB_OK); DWORD dwError=GetLastError(); return FALSE; } dcb.DCBlength = sizeof( DCB ); GetCommState( m_hIDComDev, &dcb ); dcb.BaudRate = nBaud; dcb.fBinary = TRUE; // Binary mode; no EOF check dcb.fParity = TRUE; // Enable parity checking dcb.fOutxCtsFlow = FALSE; // No CTS output flow control dcb.fOutxDsrFlow = FALSE; // No DSR output flow control dcb.fDtrControl = DTR_CONTROL_ENABLE; // DTR flow control type dcb.fDsrSensitivity = FALSE; // DSR sensitivity dcb.fTXContinueOnXoff = TRUE; // XOFF continues Tx dcb.fOutX = FALSE; // No XON/XOFF out flow control dcb.fInX = TRUE; // No XON/XOFF in flow control dcb.fErrorChar = FALSE; // Disable error replacement dcb.fNull = FALSE; // Disable null stripping dcb.fRtsControl = RTS_CONTROL_ENABLE; // RTS flow control dcb.fAbortOnError = FALSE; // Do not abort reads/writes on // error dcb.ByteSize = 8; // Number of bits/byte, 4-8 dcb.Parity = 0; // 0-4=no,odd,even,mark,space dcb.StopBits = ONE5STOPBITS; // 0,1,2 = 1, 1.5, 2 if( !SetCommState( m_hIDComDev, &dcb )|| !SetupComm( m_hIDComDev, 1024, 1024 )/*|| m_OverlappedRead.hEvent == NULL || m_OverlappedWrite.hEvent == NULL*/ ) { DWORD dwError = GetLastError(); //if( m_OverlappedRead.hEvent != NULL ) CloseHandle( m_OverlappedRead.hEvent ); //if( m_OverlappedWrite.hEvent != NULL ) CloseHandle( m_OverlappedWrite.hEvent ); CloseHandle( m_hIDComDev ); //::MessageBox(0,_T("初始化端口不正确！"),_T("ERROR!"),MB_OK ); return( FALSE ); } else { } m_bOpened = TRUE; return( m_bOpened ); } //====================== BOOL CSerial::PortClose (void) { if (m_bOpened) { // Close the communication port. if (!CloseHandle (m_hIDComDev)) { DWORD dwError = GetLastError (); } else { //::MessageBox (NULL,_T("正常退出，谢谢使用!"),_T("RIGHT"),MB_OK); } m_bOpened = FALSE; } } else { return(FALSE); } return( TRUE ); } BOOL CSerial::SendData( const char *buffer, int size ) { DWORD dwNumByteWritten; if(!WriteFile(m_hIDComDev,buffer,size,&dwNumByteWritten,NULL)) { DWORD dwError = GetLastError(); return FALSE; } return TRUE; } int CSerial::ReadData( char *data ) { char Byte; DWORD dwCommModemStatus,dwBytesTransferred; int len = 0; SetCommMask (m_hIDComDev, EV_RXCHAR | EV_CTS | EV_DSR | EV_RLSD ); if (m_hIDComDev!= INVALID_HANDLE_VALUE) { WaitCommEvent (m_hIDComDev, &dwCommModemStatus, 0); SetCommMask (m_hIDComDev, EV_RXCHAR | EV_CTS | EV_DSR ); if (dwCommModemStatus & EV_RXCHAR) { // Loop for waiting for the data. do { // Read the data from the serial port. ReadFile (m_hIDComDev, &Byte, 1, &dwBytesTransferred, 0 ); // Display the data read. if (dwBytesTransferred == 1) { data[len] = Byte; data[len+1] = 0; len++; } } while (dwBytesTransferred == 1); } } return len; }