Omega OMB-PER-488/W95, User Manual

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Personal488 User's Manual For Windows 95 and Windows NT API Command Reference 59
DigArmSetup
AT488pnp and PCI488 only
Syntax
INT WINAPI DigArmSetup(DevHandleT devHandle, BYTE
byMatchValue);
devHandle refers to an interface handle.
byMatchValue
refers to a value that is compared against the digital I/O inputs
Returns
-1 if error
Mode
Any
Bus States
None
Example DigArmSetup(devHandle, 0xA5);
Sets the match value to 0xA5 .
See Also
DigArm, DigSetup
The
DigArmSetup
command sets the match condition value. This value will be compared against the
digital I/O port inputs to detect when an event occurs. The event must be armed (via
DigArm
) for
event notification to take place.
The comparison operation depends on the current digital port configuration. If both nibbles are
configured for input, then the match value is compared to the entire byte value of the digital port. If
only one of the nibbles is configured for input, then the value is compared against just that nibble. If no
nibbles are configured for input, then the match value is ignored. The
DigArm
function will not allow
event generation to be armed unless at least one of the nibbles is configured for input.