CSerialCommHelper::CSerialCommHelper()
{
InvalidateHandle( ThreadTerm );
InvalidateHandle( Thread );
InvalidateHandle( ThreadStarted );
InvalidateHandle( CommPort );
InvalidateHandle( DataRx );
InitLock();
state = SS_UnInit;
}
CDll_RS232::CDll_RS232( void ):m_bIsConnection( FALSE ) ,
m_SignalDataReceive( NULL )
{
InvalidateHandle( m_hThread ) ;
InvalidateHandle( m_hCommPort ) ;
InvalidateHandle( m_hTerminate ) ;
InvalidateHandle( m_hThreadStarted ) ;
InitLock() ;
char szPath[ MAX_PATH ] ;
ZeroMemory( szPath , MAX_PATH ) ;
GetModuleFileName( NULL , szPath , MAX_PATH ) ;
char *p = strrchr( szPath , '.' ) ;
strcpy( p + 1 , "log" ) ;
stream = fopen( szPath, "w" );
}
void CSerialCommHelper::CloseAndCleanHandle(HANDLE& Handle)
{
BOOL res = CloseHandle( Handle ) ;
if ( !res )
{
g_assert(0);
MTXDBG(CRITICAL,_( "CSerialCommHelper : Failed to open Close Handle %d :Last Error: %d"),Handle,GetLastError());
}
InvalidateHandle ( Handle );
}
HRESULT CSerialCommHelper:: Init(std::string PortName, DWORD BaudRate,BYTE byParity,BYTE byStopBits,BYTE byByteSize)
{
HRESULT hr = S_OK;
try
{
DataRx = CreateEvent(0,0,0,0);
//open the COM Port
CommPort = ::CreateFile(PortName.c_str (),
GENERIC_READ|GENERIC_WRITE,//access ( read and write)
0, //(share) 0:cannot share the COM port
0, //security (None)
OPEN_EXISTING,// creation : open_existing
FILE_FLAG_OVERLAPPED,// we want overlapped operation
0// no templates file for COM port...
);
if ( CommPort == INVALID_HANDLE_VALUE )
{
MTXDBG(CRITICAL,_( "CSerialCommHelper : Failed to open COM Port Reason: %d"),GetLastError());
g_assert ( 0 );
return E_FAIL;
}
MTXDBG(CRITICAL,_( "CSerialCommHelper : COM port opened successfully"));
//now start to read but first we need to set the COM port settings and the timeouts
if (! ::SetCommMask(CommPort,EV_RXCHAR|EV_TXEMPTY) )
{
g_assert(0);
MTXDBG(CRITICAL,_("CSerialCommHelper : Failed to Set Comm Mask Reason: %d"),GetLastError());
return E_FAIL;
}
MTXDBG(CRITICAL,_( "CSerialCommHelper : SetCommMask() success"));
//now we need to set baud rate etc,
DCB dcb = {0};
dcb.DCBlength = sizeof(DCB);
if (!::GetCommState (CommPort,&dcb))
{
MTXDBG(CRITICAL,_("CSerialCommHelper : Failed to Get Comm State Reason: %d"),GetLastError());
return E_FAIL;
}
dcb.BaudRate = BaudRate;
dcb.ByteSize = byByteSize;
dcb.Parity = byParity;
if ( byStopBits == 1 )
dcb.StopBits = ONESTOPBIT;
else if (byStopBits == 2 )
dcb.StopBits = TWOSTOPBITS;
else
dcb.StopBits = ONE5STOPBITS;
dcb.fDsrSensitivity = 0;
// dcb.fDtrControl = DTR_CONTROL_ENABLE;
dcb.fOutxDsrFlow = 0;
if (!::SetCommState (CommPort,&dcb))
{
g_assert(0);
MTXDBG(CRITICAL,_("CSerialCommHelper : Failed to Set Comm State Reason: %d"),GetLastError());
return E_FAIL;
}
MTXDBG(CRITICAL,_("CSerialCommHelper : Current Settings, (Baud Rate %d; Parity %d; Byte Size %d; Stop Bits %d"), dcb.BaudRate, dcb.Parity,dcb.ByteSize,dcb.StopBits);
//now set the timeouts ( we control the timeout overselves using WaitForXXX()
COMMTIMEOUTS timeouts;
timeouts.ReadIntervalTimeout = MAXDWORD;
timeouts.ReadTotalTimeoutMultiplier = 0;
timeouts.ReadTotalTimeoutConstant = 0;
timeouts.WriteTotalTimeoutMultiplier = 0;
timeouts.WriteTotalTimeoutConstant = 0;
if (!SetCommTimeouts(CommPort, &timeouts))
{
g_assert(0);
MTXDBG(CRITICAL,_("CSerialCommHelper : Error setting time-outs. %d"),GetLastError());
return E_FAIL;
}
//create thread terminator event...
ThreadTerm = CreateEvent(0,0,0,0);
ThreadStarted = CreateEvent(0,0,0,0);
Thread = (HANDLE)_beginthreadex(0,0,CSerialCommHelper::ThreadFn,(void*)this,0,0 );
DWORD Wait = WaitForSingleObject ( ThreadStarted , INFINITE );
g_assert ( Wait == WAIT_OBJECT_0 );
CloseHandle(ThreadStarted);
InvalidateHandle(ThreadStarted );
connected = true;
}
catch(...)
{
g_assert(0);
hr = E_FAIL;
}
if ( SUCCEEDED(hr) )
{
state = SS_Init;
}
return hr;
}
/** Release current resource. Next request will require
lookup. */
void InvalidateCurrent()
{
InvalidateHandle(handle_);
}