MATLAB SIMULINK 7 - DEVELOPING S-FUNCTIONS Uživatelská příručka stáhnout pdf (Strana 62)

3 Writing S-Functions As C-MEX files

3-18

Alternate Calling Structure for External Mode

When running Simulink in external mode, the calling sequence for S-function

routines changes. This picture shows the correct sequence for external mode:

Figure 3-3: S-Function Calling Sequence when Simulink Runs in External

Mode

Simulink calls mdlRTW once when it enters external mode and again each

time a parameter changes or when you select

Update Diagram under your

model’s

Edit menu.

Note Running Simulink in external mode requires the Real-Time Workshop.

For more information about external mode, see the Real-Time Workshop

User’s Guide.

mdlRTW For code generation only

p. 3-54

mdlTerminate

p. 3-53

mdlSetInputPortWidth/mdlSetOutputPortWidth

mdlInitializeSizes

mdlInitializeSampleTimes

mdlSetWorkWidths

mdlStart

p. 3-28

p. 3-35

p. 3-46

p. 3-48

p. 3-36

mdlSetInputPortSampleTime/mdlSetOutputPortSampleTime

p. 3-33

mdlInitializeConditions

p. 3-48

External mode

parameter change loop

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MATLAB SIMULINK 7 - DEVELOPING S-FUNCTIONS Uživatelská příručka Strana 62