BOOL OpenPort(int nCom)
{
TCHAR szPortName[32];
_stprintf_s(szPortName, 32, _T("\\\\.\\COM%d"), nCom);
g_hCom = CreateFile(szPortName,
GENERIC_WRITE | GENERIC_READ,
0,
NULL,
OPEN_EXISTING,
0,
NULL);
if ( (g_hCom == NULL) || (g_hCom == INVALID_HANDLE_VALUE) )
{
// port is not valid
TRACE(_T("(COM%d): Invalid COM port\n"), nCom);
return FALSE;
}
TRACE(_T("(COM%d): Testing COM state\n"), nCom);
if ( ! ConfigureComPort() )
{
if ( g_hCom )
{
CloseHandle(g_hCom);
g_hCom = NULL;
}
TRACE(_T("(COM%d): Failed to test COM port\n"), nCom);
return FALSE;
}
TRACE(_T("(COM%d): Opened\n"), nCom);
return TRUE;
}
void CComThreadBasic::ReconnectCom(const char *ComName)
{
LPTSTR lpMsgBuf;
m_CsReconnect.Lock();
if(m_hComPort!=INVALID_HANDLE_VALUE)
{
CloseHandle(m_hComPort);
m_hComPort=INVALID_HANDLE_VALUE;
}
m_hComPort=CreateFile(ComName, GENERIC_WRITE|GENERIC_READ, 0, NULL, OPEN_EXISTING ,
FILE_ATTRIBUTE_NORMAL, NULL);
if(m_hComPort==INVALID_HANDLE_VALUE)
{
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER|FORMAT_MESSAGE_FROM_SYSTEM|
FORMAT_MESSAGE_IGNORE_INSERTS, NULL, GetLastError(),MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR) &lpMsgBuf, 0, NULL);
Msg("Ошибка открытия порта %s.\n%s", &ComName[0],(LPCTSTR)lpMsgBuf);
LocalFree(lpMsgBuf);
m_CsReconnect.Unlock();
return;
}
ConfigureComPort(m_hComPort, m_BaudRate);
if(m_hComThread!=NULL)
{
DWORD ExitCode=0;
GetExitCodeThread(m_hComThread,&ExitCode);
if(ExitCode!=STILL_ACTIVE) //Поток вышел по ошибке
{
DWORD Unused;
m_hComThread=CreateThread(NULL,NULL, &CComThreadBasic::ComThread,this,0,&Unused);
}
}
else //Начальное создание потока
{
DWORD Unused;
m_hComThread=CreateThread(NULL,NULL, &CComThreadBasic::ComThread,this,0,&Unused);
}
m_CsReconnect.Unlock();
}