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Chapter 2 Function Reference — WFM_from_Disk
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National Instruments Corporation 2-417 NI-DAQ FRM for PC Compatibles
WFM_from_Disk
Format
status = WFM_from_Disk (deviceNumber, numChans, chanVect, fileName, startPt, endPt,
iterations, rate)
Purpose
Assigns a disk file to one or more analog output channels, selects the rate and the number of
times the data in the file is to be generated, and starts the generation.
WFM_from_Disk always
waits for completion before returning, unless you call
Timeout_Config.
Parameters
Input
Parameter Discussion
numChans indicates the number of analog output channels specified in the array chanVect.
chanVect is the array of channel numbers indicating which analog output channels are to
receive output data from the file.
Channel number range:
0 or 1 for most devices.
0 through 5 for AT-AO-6.
0 through 9 for AT-AO-10.
Name Type Description
deviceNumber i16 assigned by configuration utility
numChans i16 number of analog output channels
chanVect [i16] channel numbers
fileName STR name of the data file containing the waveform data
startPt u32 place in a file where waveform generation is to
begin
endPt u32 place in a file where waveform generation is to
end
iterations u32 number of times generated
rate f64 desired rate in points per second