MATLAB XPC TARGET RELEASE NOTES Guida Utente Scaricare il pdf (Pagina 250)

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13 Incorporating Fortran Code into the xPC Ta rget™ Environment

P[k] = mxGetScalar(P0(S)) * (double) fdelta;

rho[k] = mxGetScalar(R0(S)) * (double) fsigma;

}

12 Use the mdlTerminate callback to perform any actions required at

termination of the simulation. Even if you do not have any operations here,

you must include a stub for this callback.

static void mdlTerminate(SimStruct *S)

{

}

13 In the file, read the commented documentation for the following callbacks:

•

mdlInitalizeConditions — Initializes the state vectors of this

S-function.

•

mdlStart — Initializes the state vectors of this S-function. This function

is called once at the start of the model e xecution.

•

mdlUpdate — Updates the states of a block.

These are optional callbacks that you can define for later projects. You do

not need to specify these callbacks for this example.

14 Delete or comment out the code for these callbacks.

15 Save the file under another name. For example, save this file as

sfun_atmos.c. Do not overwrite the template file.

16 Copy the file sfun_atmos.c into y our Fortran working folder, for e xample,

xpc_fortran_test.

Your next task is to compile and link the wrapper S-function. See “Compiling

and Linking the Wrapper S-Function” on page 13-12.

Compiling and Linking the Wrapper S-Function

This topic describes how to create (compile and link) a C-MEX S-function from

the

sfun_atmos.c file. Before you start, ensure that the f ollowing files are in

the working folder,

xpc_fortran_test. You should have copied these files

when you performed the steps in “Compiling Fortran Files” on page 13-7.

13-12

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