Table Of Contents

Create Waveform (From File » DBL) (G Dataflow)

Last Modified: August 3, 2017

Takes waveform data from a specified file of double-precision floating-point data and creates an onboard waveform for use in arbitrary waveform or arbitrary sequence output modes.

The waveform generator must not be in the Generating state when you call this node.

Programming Patterns

You must set the output mode input of Configure Output Mode to arbitrary waveform or arbitrary sequence before calling this node.

connector_pane_image
datatype_icon

session in

Handle that identifies your instrument session previously allocated by Initialize With Options.

datatype_icon

channel name

Name of the waveform generator channel that the node uses.

datatype_icon

file name

Full path and name of the file that contains the waveform data.

The floating-point data must be between -1.0 and +1.0. Use the gain input of Configure Arbitrary Waveform or Configure Arbitrary Sequence to generate different voltages.

datatype_icon

byte order

Byte order of the data in the file.

Name Value Description
Little Endian 0 The byte order of the data in the specified file is Little Endian.
Big Endian (LabVIEW) 1 The byte order of the data in the specified file is Big Endian.

Big Endian Versus Little Endian Data Formats

Big Endian and Little Endian refer to the way data is stored in memory, which can differ on different processors.

Data written by most applications in Windows, including LabWindows™/CVI™, is in Little Endian format. Data written to a file from LabVIEW is in Big Endian format by default on all platforms.

datatype_icon

error in

Error conditions that occur before this node runs.

The node responds to this input according to standard error behavior.

Standard Error Behavior

Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

error in does not contain an error error in contains an error
If no error occurred before the node runs, the node begins execution normally.

If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

Default: No error

datatype_icon

session out

Reference to your instrument session to wire to the next node.

datatype_icon

waveform reference out

Reference that identifies the waveform.

This output can be used later for setting the active waveform, changing the data in the waveform, building sequences of waveforms, or deleting the waveform when it is no longer needed.

datatype_icon

error out

The node produces this output according to standard error behavior.

Standard Error Behavior

Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

error in does not contain an error error in contains an error
If no error occurred before the node runs, the node begins execution normally.

If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

Where This Node Can Run:

Desktop OS: Windows

FPGA: Not supported


Recently Viewed Topics