Advantech PCI-1682U Manual de usuario descargar pdf (Pagina 53)

47 PCI-1680U/1682U User Manual

Chapter 4 Software Requirements

if (hDevice == INVALID_HANDLE_VALUE)

{

// Handle the error.

printf("CreateFile failed with error %d.\n", GetLas-

tError());

return;

}

// Set the event mask.

bSuccess = SetCommMask(hDevice, EV_ERR | EV_RXCHAR);

if (!bSuccess)

{

// Handle the error.

printf("SetCommMask failed with error %d.\n", GetLas-

tError());

return;

}

// Create an event object for use by WaitCommEvent.

ov.hEvent = CreateEvent(

NULL, // default security attributes

FALSE, // auto reset event

FALSE, // not signaled

NULL // no name

);

// Intialize the rest of the OVERLAPPED structure to

zero.

ov.Internal = 0;

ov.InternalHigh = 0;

ov.Offset = 0;

ov.OffsetHigh = 0;

if (WaitCommEvent(hDevice, &dwEvtMask, &ov))

{

if (dwEvtMask & EV_ERR)

{

// To do.

}

if (dwEvtMask & EV_RXCHAR)

{

// To do.

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Advantech PCI-1682U Manual de usuario Pagina 53