MATLAB SIMULINK 7 - DEVELOPING S-FUNCTIONS Guide de l'utilisateur télécharger pdf (Page 21)

Introduction

1-15

The simulink/src directoryalsocontainsexamplesofCMEXS-functions,

many of which have an M-file S-function counterpart. These C MEX

S-functions are listed in this table.

sfun_varargm.m

This isanexample M-file S-functionshowinghow to

use the MATLAB

vararg facility.

vlimintm.m

An example of a continuous limited integrator

S-function.This illustrates howto usethe sizee ntry

−1 to build an S-function that can accommodate a

dynamic input/state width.

vdlimintm.m

An example of a discrete limited integrator

S-function. This example is identical to

vlimint.m,

except that the limited integrator is discrete.

Table 1-3: Example C MEX S-Functions

Filename Description

timestwo.c

A basic C MEX S -functio n that double s its input.

csfunc.c

An example C MEX S-function for defining a

continuous system.

dsfunc.c

An example C MEX S-function for defining a

discrete system.

dlimint.c

Implements a discrete-t ime limited i n te grator.

vsfunc.c

Illustrates how t o create a varia ble step block in

Simulink. T h is block im pleme n ts a variable step

delay in which the first input is delayed by an

amount of time determined by the second input.

mixed.c

Implements a hybrid dynamica l system consisting

of a continuous integrator (1/s) i n series with a unit

delay (1/z ).

Table 1-2: Example M-File S-Functions (Continued)

Filename Description

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 209 210

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MATLAB SIMULINK 7 - DEVELOPING S-FUNCTIONS Guide de l'utilisateur Page 21