www.gusucode.com > rtwdemos 工具箱matlab源码程序 > rtwdemos/rtwdemo_lct_sampletime_script.m
%% Specification of Block Sample Time % This example shows you how to use the Legacy Code Tool to integrate legacy C % functions with the block's sample time specified, inherited and % parameterized. % % 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, 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 % prototypes of the legacy functions being called in this example are: % % FLT gainScalar(const FLT in, const FLT gain) % % where FLT is a typedef to float. The legacy source code is found in the % files % <matlab:rtwdemo_lct_util('edit','rtwdemo_lct_src/your_types.h') your_types.h>, % <matlab:rtwdemo_lct_util('edit','rtwdemo_lct_src/gain.h') gain.h>, and % <matlab:rtwdemo_lct_util('edit','rtwdemo_lct_src/gainScalar.c') gainScalar.c>. defs = []; % rtwdemo_sfun_st_inherited def = legacy_code('initialize'); def.SFunctionName = 'rtwdemo_sfun_st_inherited'; def.OutputFcnSpec = 'single y1 = gainScalar(single u1, single p1)'; def.HeaderFiles = {'gain.h'}; def.SourceFiles = {'gainScalar.c'}; def.IncPaths = {'rtwdemo_lct_src'}; def.SrcPaths = {'rtwdemo_lct_src'}; defs = [defs; def]; % rtwdemo_sfun_st_fixed def = legacy_code('initialize'); def.SFunctionName = 'rtwdemo_sfun_st_fixed'; def.OutputFcnSpec = 'single y1 = gainScalar(single u1, single p1)'; def.HeaderFiles = {'gain.h'}; def.SourceFiles = {'gainScalar.c'}; def.IncPaths = {'rtwdemo_lct_src'}; def.SrcPaths = {'rtwdemo_lct_src'}; def.SampleTime = [2 1]; defs = [defs; def]; % rtwdemo_sfun_st_parameterized def = legacy_code('initialize'); def.SFunctionName = 'rtwdemo_sfun_st_parameterized'; def.OutputFcnSpec = 'single y1 = gainScalar(single u1, single p1)'; def.HeaderFiles = {'gain.h'}; def.SourceFiles = {'gainScalar.c'}; def.IncPaths = {'rtwdemo_lct_src'}; def.SrcPaths = {'rtwdemo_lct_src'}; def.SampleTime = 'parameterized'; defs = [defs; def]; %% Generating S-Functions 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 C-MEX S-functions % according to the description provided by the input argument 'defs'. % The S-functions are used to call the legacy functions in simulation. % The source code for the S-functions is found in the files % <matlab:rtwdemo_lct_util('edit','rtwdemo_sfun_st_inherited.c') rtwdemo_sfun_st_inherited.c> and % <matlab:rtwdemo_lct_util('edit','rtwdemo_sfun_st_fixed.c') rtwdemo_sfun_st_fixed.c>. % <matlab:rtwdemo_lct_util('edit','rtwdemo_sfun_st_parameterized.c') rtwdemo_sfun_st_parameterized.c>. legacy_code('sfcn_cmex_generate', defs); %% 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', defs); %% 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_st_inherited.tlc') rtwdemo_sfun_st_inherited.tlc> and % <matlab:rtwdemo_lct_util('edit','rtwdemo_sfun_st_fixed.tlc') rtwdemo_sfun_st_fixed.tlc>. % <matlab:rtwdemo_lct_util('edit','rtwdemo_sfun_st_parameterized.tlc') rtwdemo_sfun_st_parameterized.tlc>. legacy_code('sfcn_tlc_generate', defs); %% Generating an rtwmakecfg.m File for Code Generation % After the TLC block file is created, the function % legacy_code() can be called again with the first input set to % 'rtwmakecfg_generate' in order 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', defs); %% 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', defs); %% Showing the Generated Integration with Legacy Code % The model <matlab:rtwdemo_lct_sampletime rtwdemo_lct_sampletime> % shows integration with the legacy % code. The subsystem sample_time serves as a harness for the calls to the % legacy C functions, with unit delays serving to store the previous % output values. open_system('rtwdemo_lct_sampletime') open_system('rtwdemo_lct_sampletime/sample_time') sim('rtwdemo_lct_sampletime')