www.gusucode.com > rtwdemos 工具箱matlab源码程序 > rtwdemos/rtwdemo_lct_bus_script.m
%% Structure Arguments Using Buses % This example shows you how to use the Legacy Code Tool to integrate legacy C % functions with structure arguments using Simulink(R) buses. % % The Legacy Code Tool allows you to: % % * Provide the legacy function specification, % * Generate a C-MEX S-function that is used during simulation to call the legacy code, % * Compile and build the generated S-function for simulation, and % * Generate a block TLC file and optional rtwmakecfg.m file that is used during code generation to call the legacy code. % % Copyright 1990-2012 The MathWorks, Inc. %% Providing the Legacy Function Specification % Functions provided with the Legacy Code Tool take a specific data % structure or array of structures as the argument. The data structure is % initialized by calling the function legacy_code() using 'initialize' as the % first input. After initializing the structure, you have to 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) % % where 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 found 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'}; %% Generating an S-Function for Use During Simulation % The function legacy_code() is called again with the first input set to % 'sfcn_cmex_generate' in order to automatically generate a C-MEX S-function % according to the description provided by the input argument 'def'. % The S-function is used to call the legacy functions in simulation. % The source code for the S-function is found in the file % <matlab:rtwdemo_lct_util('edit','rtwdemo_sfun_counterbus.c') rtwdemo_sfun_counterbus.c>. legacy_code('sfcn_cmex_generate', def); %% Compiling the Generated S-Function for Simulation % After the C-MEX S-function source files are generated, the function % legacy_code() is called again with the first input set to 'compile' in order % to compile the S-function for simulation with Simulink(R). legacy_code('compile', def); %% Generating a TLC Block File for Code Generation % After the S-function is compiled and used in simulation, the function % legacy_code() can be called again with the first input set to % 'sfcn_tlc_generate' in order to generate a TLC block file to support % code generation through Simulink(R) Coder(TM). Code generation will fail % if the TLC block file is not created and you try to generate code for a model % that includes the S-function. 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); %% Generating an rtwmakecfg.m File for Code Generation % After the TLC block file is created, 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 through Simulink(R) Coder(TM). Generate the rtwmakecfg.m % file if the required source and header files for the S-functions are not % in the same directory as the S-functions, and you want to add these % dependencies in the makefile produced during code generation. legacy_code('rtwmakecfg_generate', def); %% Generating a masked S-Function block for calling the generated S-Function % After the C-MEX S-function source is compiled, the function % legacy_code() can be called again with the first input set to 'slblock_generate' in order % to generate a masked S-function block that is configured to call that % S-function. The block is placed in a new model and can be copied to an % existing model. % legacy_code('slblock_generate', def); %% Showing the Generated Integration with Legacy Code % The model <matlab:rtwdemo_lct_bus rtwdemo_lct_bus> % shows integration 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')