🚀 go-pugleaf

Hello.... i made a Synchronous Comm Port and it works under XP OS where i 
programmed it), but in W2K and 98 don't work.  I will write here the Read, 
Write and create functions....

CREATE FUNCTION
//-----------------------------------------------------------------------
bool __stdcall clsCommPort::CreatePort(
    LPTSTR strComm
)

{
    // Specific Port is Opened
    //
 m_hPort = CreateFile (strComm, GENERIC_READ | GENERIC_WRITE,0,
                          NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);

    // Catch error
    //
 if (m_hPort == INVALID_HANDLE_VALUE){
  wLastError = GetLastError();
  return false;
 }

 COMMTIMEOUTS CommTimeouts;

    // Time Outs of the are Configurated
    //
 GetCommTimeouts(m_hPort, &CommTimeouts);
 CommTimeouts.ReadIntervalTimeout = MAXWORD;
 CommTimeouts.ReadTotalTimeoutMultiplier = 1;
 CommTimeouts.ReadTotalTimeoutConstant = 1;
 CommTimeouts.WriteTotalTimeoutMultiplier = 1;
 CommTimeouts.WriteTotalTimeoutConstant = 5;

    if (!SetCommTimeouts(m_hPort, &CommTimeouts)){
        // Catch error
        //
  wLastError = GetLastError();
  return false;
 }

    // Port is Configurated with the Espicified BaudRate
    // and the Common and/or standart values
    //
 PortDCB.DCBlength = sizeof (DCB);

 GetCommState(m_hPort, &PortDCB);

 PortDCB.BaudRate = wBaudRate;
 PortDCB.fBinary = true;
 PortDCB.fParity = false;

 PortDCB.fOutxCtsFlow = false;
 PortDCB.fOutxDsrFlow = false;
 PortDCB.fDtrControl = DTR_CONTROL_DISABLE;

 PortDCB.fDsrSensitivity = false;
 PortDCB.fTXContinueOnXoff = true;
 PortDCB.fOutX = false;
 PortDCB.fInX = false;
 PortDCB.fErrorChar = false;
 PortDCB.fNull = false;
 PortDCB.fRtsControl = RTS_CONTROL_DISABLE; //RTS_CONTROL_ENABLE
    PortDCB.XoffLim = 100;
    PortDCB.XonLim = 100;

 PortDCB.ByteSize = 8;
 PortDCB.fAbortOnError = true;
    PortDCB.wReserved = 0;

 PortDCB.Parity = NOPARITY;
 PortDCB.StopBits = ONESTOPBIT;

    // Set Dcb Configuration to the Port
    //
 if (!SetCommState(m_hPort, &PortDCB)){
        // Catch Error
        //
  wLastError = GetLastError();
  return false;
 }

    // Everything Ok
    //
    return true;

-- 
//-----------------------------------------------------------------------

READ FUNCTION:
//-----------------------------------------------------------------------
DWORD __stdcall PortReadThread(
    LPVOID lpvoid
)
{
 clsCommPort* pPort = (clsCommPort*) lpvoid;
 DWORD dwBytesTransferred;
 BYTE buffer[2048];

 while(pPort->GetHandlerPort() != INVALID_HANDLE_VALUE){
        ReadFile(pPort->GetHandlerPort(), buffer, 1, 
&dwBytesTransferred,NULL);
        if(dwBytesTransferred == 0)
            Sleep(2);
        else{

            for (i=0; i < (int)dwBytesTransferred; i++){
                pPort->AddCharToQueue(buffer[i]);
            }
            dwBytesTransferred = 0;
            pPort->Read();
        }
 }

    // Finish Thread
    //
 return 0;
//-----------------------------------------------------------------------

WRITE FUNCTION
//-----------------------------------------------------------------------
bool __stdcall clsCommPort::Write(
    BYTE Byte
)
   DWORD dwBWrote,iErr;
    bool bTest;

    bTest = WriteFile(m_hPort,&Byte,1,&dwBWrote,NULL);
    if(!bTest){
        if(dwBWrote == 0)
            return false;
        iErr = GetLastError ();
        if(iErr != ERROR_IO_PENDING)
            return false;
    }
    return true;
//------------------------------------------------------------------------
This work perfecly in Windows XP -SP 2.

Keneth Wagner.