User`s guide

2 Automa tion Interface

Note To be able to open and enable channels over a link to RTDX, the

program loaded on your processor m ust include functions or code that deﬁne

the channels.

Your C source code might look somethinglikethistocreatetwochannels,

onetowriteandonetoread.

rtdx_CreateInputChannel(ichan); % processor reads from this.

rtdx_CreateOutputChannel(ochan); % processor writes to this.

These are the entries we use in int16.c (the source code that generates

rtdxtutorial_6xevm.out) to create the read and write channels.

If you are working with a model in Simulink software and usin g code

generation,usetheToRtdxandFromRtdxblocksinyourmodeltoaddthe

RTDX communications channels to your model and to the executable code

on your processor.

Onemorenoteaboutthistutorial. Throughoutthecodeweuseboththedot

notation (direct property referencing) to access functions and link properties

and the function form.

For example, use the following command to open and conﬁgure

ichan for

write m ode.

cc.rtdx.open('ichan','w');

You could use a n equivalent syntax, the function form, that does not use

direct property referencing.

open(cc.rtdx,'ichan','w');

Or, use

open(rx,'ichan','w');

if you created an alias rx to the RTDX p ortion of cc, as shown by the following

command:

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