MATLAB XPC TARGET 4 - API GUIDE Guide de l'utilisateur télécharger pdf (Page 35)

100

101

Working with Scope Objects

2-17

“Acquisition of Gap-Free Data” on page 2-17, illustrates how the scopes trigger

one another.

Acquisition of Gap-Free Data

The following code is a typical example of how you can retrieve gap-free data.

You can type this code into an m file and run that file for a downloaded target

application. This example assumes that the communication speed and number

of samples are fast enough to acquire the full data set before the next

acquisition cycle is due to start. You can also use more than two scopes to

implement a triple- or quadruple-buffering scheme instead of the

double-buffering one illustrated here.

% Assumes that model is built and loaded on target.

tg = xpctarget.xpc;

sc = tg.addscope('target', [1 2]);

addsignal(sc,[0 1]);

% [0 1] are the signals of interest; add to both

% Default value for TriggerSample is 0, need to change it.

set(sc, 'NumSamples', 500, 'TriggerSample', -1)

set(sc, 'TriggerMode', 'Scope');

sc(1).TriggerScope = 2;

sc(2).TriggerScope = 1;

start(sc);

start(tg);

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MATLAB XPC TARGET 4 - API GUIDE Guide de l'utilisateur Page 35

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