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Chapter 10 Easy I/O for DAQ Library
© National Instruments Corporation 10-15 LabWindows/CVI Standard Libraries
AICheckAcquisition
short
error
=
AICheckAcquisition
(unsigned long
taskID
,
unsigned long *
scanBacklog
);
Purpose
This function can be used to determine the backlog of scans that have been acquired into the
circular buffer but have not been read using AIReadAcquisition.
If
AIReadAcquisition is called with read mode set to LATEST_MODE,
scanBacklog
is
reset to zero.
Parameters
Input
taskID
unsigned
long integer
The task ID that was returned from
AIStartAcquisition.
Output
scanBacklog
unsigned
long integer
Returns the backlog of scans that have been acquired
into the circular buffer but have not been read using
AIReadAcquisition.
Return Value
error
short integer Refer to error codes in Table 10-5.
AIClearAcquisition
short
error
=
AIClearAcquisition
(unsigned long
taskID
);
Purpose
This function clears the current asynchronous acquisition that was started by
AIStartAcquisition.
Parameters
Input
taskID
unsigned
long integer
The task ID that was returned from
AIStartAcquisition.
Return Value
error
short integer Refer to error codes in Table 10-5.