National Instruments 321645c-01 用户手册
Chapter 2
Function Reference — WFM_Check
NI-DAQ FRM for PC Compatibles
2-404
©
National Instruments Corporation
WFM_Check
Format
status = WFM_Check (deviceNumber, chan, wfmStopped, itersDone, pointsDone)
Purpose
Returns status information concerning a waveform generation operation.
Parameters
Input
Output
Parameter Discussion
chan is the number of the analog output channel performing the waveform generation
operation.
operation.
Range:
0 or 1 for most devices.
0 through 5 for AT-AO-6.
0 through 9 for AT-AO-10.
0 through 5 for AT-AO-6.
0 through 9 for AT-AO-10.
wfmStopped is a flag whose value indicates whether the waveform generation operation is
still in progress. If the number of iterations indicated in the last
still in progress. If the number of iterations indicated in the last
WFM_Load
call is 0, the status
is always 0.
0:
Ongoing operation.
1:
Complete operation.
itersDone returns the number of buffer iterations that have been completed.
Name
Type
Description
deviceNumber
i16
assigned by configuration utility
chan
i16
number of the analog output channel
Name
Type
Description
wfmStopped
i16
whether the waveform is still in progress
itersDone
u32
number of buffer iterations completed
pointsDone
u32
number of points written for the current buffer
iteration
iteration