preload

Queue scan data for device output

Since R2020a

Syntax

preload(d,scanData)

Description

preload(d,scanData) provides scan data to the DataAcquisition interface d for device output.

You queue data before calling start on your DataAcquisition. Calling start runs the DataAcquisition in the background, without blocking MATLAB.

Examples

Queue Scan Data for Device Output

Queue scan data to the DataAcquisition interface in preparation for device output.

Define and queue a sine wave for output of one cycle on a single channel.

scanData = sin(linspace(0,2*pi,5000)');
preload(d,scanData)
% ⋮
start(d)

Define and queue a sine wave for repeated output on a single channel.

scanData = sin(linspace(0,2*pi,5000)');
preload(d,scanData)
% ⋮
start(d,"RepeatOutput")
% ⋮
stop(d)

Input Arguments

d — DataAcquisition interface

DataAcquisition object

DataAcquisition interface, specified as a DataAcquisition object, created using the daq function.

Example: d = daq(...)

scanData — Scan data for device output

double matrix

Scan data for device output, specified as an M-by-N matrix, where M is the number of data scans and N is the number of output channels in the DataAcquisition interface. For a single channel, the data is a column vector.

Data Types: double

Version History

Introduced in R2020a