MATLAB XPC TARGET 4 - IO Guide de l'utilisateur télécharger pdf (Page 167)

Using Scope Objects

7-9

Displaying Scope Object Properties for All Scopes

To list the properties of all scope objects associated with the target object tg:

1 In the MATLAB window, type

getscope(tg) or tg.getscope

MATLAB displays a list of all scope objects associated with the target object.

2 Alternately, type

allscopes = getscope(tg) or allscopes = tg.getscope

allscopes

The current scope properties are uploaded to the host PC, and then

MATLAB displays a list of all the scope object properties with the updated

values. To list some of the scopes, use the vector index. For example, to list

the fist and third scopes, type

allscopes([1,3]).

For a list of target object properties with a description, see “Target Object

Properties” on page 6-4.

Setting the Value of a Scope Property

With xPC Target you can use either a function syntax or an object property

syntax. The syntax

set(scope_object, property_name,

new_property_value)

can be replaced by:

•

scope_object_vector.property_name = new_property_value.

•scope_object(index_vector).propety_name = new_property_value.

For example to change the trigger mode for the scope object sc1:

1 In the MATLAB window, type

sc1.triggermode = ’signal’

2 Alternately, you could type

set(sc1,’triggermode’, ’signal’) or sc1.set(’triggermode’, ’signal’)

Assignment for may also be done for a vector of scope objects, for example

allscopes([1, 2]).numsamples = 500. Notice, the indices are MATLAB vector

indices and not xPC Target scope indices.

To get a list of the writable properties, type

set(scope_object).

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MATLAB XPC TARGET 4 - IO Guide de l'utilisateur Page 167