MATLAB XPC TARGET 4 - API GUIDE Guía de usuario descargar pdf (Pagina 203)

Step-by-Step Example of Fortran and xPC Target

11-9

Creating a C-MEX Wrapper S-Function

This section assumes that you have compiled your Fortran code. See

“Compiling Fortran Files” on page 11-7.

Write the wrapper S-function for

sfun_atmos_sub.f. A wrapper S-function is

code that incorporates existing Fortran code into a Simulink S-Function block.

For details on writing such wrapper functions, refer to the writing S-Functions

Simulink documentation.

The wrapper S-function calls the Fortran subroutine

Atmos with the

appropriate calling convention:

atmos_. (Refer to “Creating Fortran

S-Functions” in the writing S-Functions documentation for further information

about calling conventions.) The wrapper S-function file for this example is

called

sfun_atmos.c.

1 Change directory to <MATLAB root>\simulink\src.

2 Copy the file sfun_atmos.c into your Fortran working directory, for

example,

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 11-9.

Compiling and Linking the Wrapper S-Function

Create (compile and link) a DLL (C-MEX DLL) from the sfun_atmos.c file. Use

the

mex command with a C/C++ compiler such as Microsoft Visual C/C++

Version 6.0.

Before you start, copy the following run-time library files from the Fortran

compiler installer directory, such as

C:\Program Files\Microsoft Visual

Studio\DF98\lib

, into the working directory, xpc_fortran_test. Copying

these files simplifies the build process.

•

dfor.lib

• dformd.lib

• dfconsol.lib

• dfport.lib

This section assumes that you have created a C_MEX wrapper S-function. See

“Creating a C-MEX Wrapper S-Function” on page 11-9.

1 2 ... 198 199 200 201 202 203 204 205 206 207 208 ... 371 372

Sin comentarios

MATLAB XPC TARGET 4 - API GUIDE Guía de usuario Pagina 203