National Instruments 321645c-01 用户手册
Chapter 2
Function Reference — WFM_Load
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National Instruments Corporation
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NI-DAQ FRM for PC Compatibles
WFM_Load
Format
status = WFM_Load (deviceNumber, numChans, chanVect, buffer, count, iterations, mode)
Purpose
Assigns a waveform buffer to one or more analog output channels and indicates the number
of waveform cycles to generate.
of waveform cycles to generate.
Parameters
Input
Parameter Discussion
numChans indicates the number of analog output channels specified in the array chanVect.
Range:
1 or 2 for most devices.
1 through 6 for AT-AO-6.
1 through 10 for AT-AO-10.
1 for DAQArb 5411 devices.
1 through 6 for AT-AO-6.
1 through 10 for AT-AO-10.
1 for DAQArb 5411 devices.
chanVect is the array of channel numbers indicating to which analog output channels the
buffer to be assigned.
Channel number range:
buffer to be assigned.
Channel number range:
0 or 1 for most devices.
0 through 5 for AT-AO-6.
0 through 9 for AT-AO-10.
0 for DAQArb 5411 devices.
0 through 5 for AT-AO-6.
0 through 9 for AT-AO-10.
0 for DAQArb 5411 devices.
Name
Type
Description
deviceNumber
i16
assigned by configuration utility
numChans
i16
number of analog output channels
chanVect
[i16]
channel numbers
buffer
[i16]
values that are converted to voltages by DACs
count
u32
number of points in the buffer
iterations
u32
number of times the waveform generation steps
through buffer
through buffer
mode
i16
enables or disables FIFO mode