User`s manual

Software Manual • EKF Intelligent I/O Controller Family On CompactPCI
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Call: DeviceIoControl(
handle, // handle returned by
CreateFile
IOCTL_SERIAL_WAIT_ON_MASK,
NULL,
0,
&Event, // pointer to a DWORD variable
1
)
sizeof(Event),
&unused, // pointer to a DWORD variable
pOverlapped // optional pointer to overlapped buffer (may be NULL)
);
Note:
1
) The DWORD Event is used to return the events that were occurred. It contains one or
more of the event flags defined in the C header file “ntddekf.h” delivered with the driver
installation package. See also I/O control request IOCTL_SERIAL_SET_WAIT_MASK for a
description of these flags.