www.gusucode.com > simulinkcoder 案例源码程序 matlab代码 > simulinkcoder/IntegrateExtCFuncsThatUseStructureArgsExample.m

    %% Integrate External C Functions That Use Structure Arguments
% Integrate legacy C functions with structure arguments that use Simulink(R) buses
% with the Legacy Code Tool.
%
% With the Legacy Code Tool, you can:
%
% * Provide the legacy function specification.
% * Generate a C-MEX S-function that calls the legacy code during
% simulation.
% * Compile and build the generated S-function for simulation.
% * Generate a TLC block file and optional rtwmakecfg.m file that specifies
% how the generated code for a model calls the legacy code.

%   Copyright 1990-2015 The MathWorks, Inc.

%% Provide the Legacy Function Specification
% Legacy Code Tool functions take a specific data structure or array of
% structures as the argument. You can initialize the data structure by
% calling the function legacy_code() using 'initialize' as the first input.
% After initializing the structure, assign its properties to values
% corresponding to the legacy code being integrated. For detailed help on
% the properties, call <matlab:legacy_code('help') legacy_code('help')>.
% The prototype of the legacy functions being called in this example is:
%
% counterbusFcn(COUNTERBUS *u1, int32_T u2, COUNTERBUS *y1, int32_T *y2)
%
% COUNTERBUS is a struct typedef defined in
% <matlab:rtwdemo_lct_util('edit','rtwdemo_lct_src/counterbus.h') counterbus.h>
% and implemented with a Simulink.Bus object in the base workspace. The 
% legacy source code is in the files
% <matlab:rtwdemo_lct_util('edit','rtwdemo_lct_src/counterbus.h') counterbus.h>, and
% <matlab:rtwdemo_lct_util('edit','rtwdemo_lct_src/counterbus.c') counterbus.c>.

evalin('base','load rtwdemo_lct_data.mat')

% rtwdemo_sfun_counterbus
def = legacy_code('initialize');
def.SFunctionName = 'rtwdemo_sfun_counterbus';
def.OutputFcnSpec = ...
    'void counterbusFcn(COUNTERBUS u1[1], int32 u2, COUNTERBUS y1[1], int32 y2[1])';
def.HeaderFiles   = {'counterbus.h'};
def.SourceFiles   = {'counterbus.c'};
def.IncPaths      = {'rtwdemo_lct_src'}; 
def.SrcPaths      = {'rtwdemo_lct_src'}; 

%%  Generate an S-Function for Simulation
% To generate a C-MEX S-function according to the description provided by
% the input argument 'def', call the function legacy_code() again with the
% first input set to 'sfcn_cmex_generate'. The S-function calls the legacy
% functions during simulation. The source code for the S-function is in the
% file
% <matlab:rtwdemo_lct_util('edit','rtwdemo_sfun_counterbus.c') rtwdemo_sfun_counterbus.c>.

legacy_code('sfcn_cmex_generate', def);

%% Compile the Generated S-Function for Simulation
% After you generate the C-MEX S-function source file, to compile the
% S-function for simulation with Simulink(R), call the function
% legacy_code() again with the first input set to 'compile'.

legacy_code('compile', def);

%% Generate a TLC Block File for Code Generation
% After you compile the S-function and use it in simulation, you can call
% the function legacy_code() again with the first input set to
% 'sfcn_tlc_generate' to generate a TLC block file. The block file
% specifies how the generated code for a model calls the legacy code. If
% you do not generate a TLC block file and you try to generate code for a
% model that includes the S-function, code generation fails. The TLC block
% file for the S-function is:
% <matlab:rtwdemo_lct_util('edit','rtwdemo_sfun_counterbus.tlc') rtwdemo_sfun_counterbus.tlc>.

legacy_code('sfcn_tlc_generate', def);

%% Generate an rtwmakecfg.m File for Code Generation
% After you create the TLC block file, you can call the function
% legacy_code() again with the first input set to 'rtwmakecfg_generate' to
% generate an rtwmakecfg.m file to support code generation. If the required
% source and header files for the S-function are not in the same folder as
% the S-function, and you want to add these dependencies in the makefile
% produced during code generation, generate the rtwmakecfg.m file.

legacy_code('rtwmakecfg_generate', def);

%% Generate a Masked S-Function Block for Calling the Generated S-Function
% After you compile the C-MEX S-function source, you can call the function 
% legacy_code() again with the first input set to 'slblock_generate'
% to generate a masked S-function block that calls that
% S-function.  The software places the block in a new model. From there you 
% can copy it to an existing model.

legacy_code('slblock_generate', def);

%% Show the Integration of the Model with Legacy Code
% The model <matlab:rtwdemo_lct_bus rtwdemo_lct_bus> 
% shows integration of the model with the legacy
% code.  The subsystem TestCounter serves as a harness for the call to the
% legacy C function.

open_system('rtwdemo_lct_bus')
open_system('rtwdemo_lct_bus/TestCounter')
sim('rtwdemo_lct_bus')