Keithley KUSB-3100, User Manual

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Appendix C
104
Name:
Description:
pData
A pointer to a unsigned long variable in
which the data from the specified register is
returned. Values can range from 0 to
4,294,967,295.
If DIO_PORT_CONFIG is specified for
Address , the value of the variable pointed to by
pData is the bit mask that specifies the
configuration of the digital I/O lines, where
bits that have "0" values are input lines and
bits that have "1" values are output lines.
If DIO_PORT_Data is specified for Address ,
the value of the variable pointed to by pData
represents the state of the digital input lines.
Notes The KUSB-3100 module has 8 fixed digital
input lines and 8 fixed digital output lines.
Return Values Possible return values are as follows:
OLBADRANGE The value is out of range for the device.
OLNOTSUPPORTED Request not supported by subsystem.
OLBADDEVHANDLE Illegal device handle specified.