初始设置

确保模型是新打开的。

model='rtwdemo_sil_topmodel';

close_system(model,0)

open_system(model)

删除现有编译文件夹。

buildFolder=RTW.getBuildDir(model);

if exist(buildFolder.BuildDirectory,'dir')

rmdir(buildFolder.BuildDirectory,'s');

end

配置模型覆盖率报告的生成设置。

set_param(model, 'RecordCoverage','on')

clear covCumulativeData

设置激励数据。

T=0.1; % sample time

[ticks_to_count, reset, counter_mode, count_enable, ...

counter_mode_values_run1, counter_mode_values_run2, ...

count_enable_values_run1, count_enable_values_run2] = ...

rtwdemo_sil_topmodel_data(T);

在 Normal 模式下运行仿真

该模型配置为收集模型覆盖率指标。仿真完成后，将打开模型覆盖率报告。使用覆盖率显示窗口从模型中的模块导航到覆盖率报告的相应部分。

counter_mode.signals.values = counter_mode_values_run1;

count_enable.signals.values = count_enable_values_run1;

set_param(model,'SimulationMode','normal');

设置仿真数据检查器以交互式查看和比较仿真结果。

Simulink.sdi.view;

Simulink.sdi.clear;

运行仿真。

simout_normal_run1 = sim(model, 'ReturnWorkspaceOutputs', 'on');

捕获结果。

Simulink.sdi.createRun('Run 1 (normal mode)', 'namevalue',...

{'simout_normal_run1'}, {simout_normal_run1});

在 Normal 模式下运行第二次仿真

对于第一次仿真，报告显示实现的覆盖率小于 100%。使用不同输入信号运行第二次仿真，将 MC/DC 覆盖率水平提高到 100%。请注意，模型覆盖率报告配置为显示两个仿真运行的累积覆盖率。

counter_mode.signals.values = counter_mode_values_run2;

count_enable.signals.values = count_enable_values_run2;

set_param(model,'SimulationMode','normal');

simout_normal_run2 = sim(model, 'ReturnWorkspaceOutputs', 'on');

Simulink.sdi.createRun('Run 2 (normal mode)', 'namevalue',...

{'simout_normal_run2'}, {simout_normal_run2});

配置模型以测量代码覆盖率

在运行 SIL 仿真之前，请检查第三方工具的可用性，并配置模型以收集代码覆盖率指标。如果第三方工具不可用，则模型将使用 Simulink® Verification and Validation™。

covToolPath = '';

ldraPath = coder.coverage.LDRA.getPath;

bullseyePath = coder.coverage.BullseyeCoverage.getPath;

coverageSettings = get_param(model,'CodeCoverageSettings');

coverageSettings.TopModelCoverage='on';

if ~isempty(ldraPath)

coverageSettings.CoverageTool='LDRA Testbed';

elseif ~isempty(bullseyePath)

coverageSettings.CoverageTool='BullseyeCoverage';

else

coverageSettings.CoverageTool='None';

end

set_param(model,'CodeCoverageSettings',coverageSettings);

在 SIL 模式下运行仿真

Normal 模式仿真得出了模型的覆盖率指标。使用 SIL 仿真，您可以对生成的代码应用相同的输入激励信号并测量代码覆盖率。

在 SIL 模式下运行第一个仿真。

counter_mode.signals.values = counter_mode_values_run1;

count_enable.signals.values = count_enable_values_run1;

set_param(model,'SimulationMode','software-in-the-loop');

set_param(model,'CodeExecutionProfiling','off');

set_param(model,'CodeProfilingInstrumentation','off');

simout_sil_run1 = sim(model, 'ReturnWorkspaceOutputs', 'on');

Simulink.sdi.createRun('Run 1 (SIL mode)', 'namevalue',...

{'simout_sil_run1'}, {simout_sil_run1});

### Starting build procedure for: rtwdemo_sil_topmodel

### Generated code for 'rtwdemo_sil_topmodel' is up to date because no structural, parameter or code replacement library changes were found.

### Successful completion of build procedure for: rtwdemo_sil_topmodel

Build Summary

Top model targets built:

Model Action Rebuild Reason

==============================================================================

rtwdemo_sil_topmodel Code compiled Compilation artifacts were out of date.

1 of 1 models built (0 models already up to date)

Build duration: 0h 0m 21.252s

### Preparing to start SIL simulation ...

Building with 'Microsoft Visual C++ 2017 (C)'.

MEX completed successfully.

### Updating code generation report with SIL files ...

### Starting SIL simulation for component: rtwdemo_sil_topmodel

### Stopping SIL simulation for component: rtwdemo_sil_topmodel

### Completed code coverage analysis

在 SIL 模式下运行第二个仿真。

counter_mode.signals.values = counter_mode_values_run2;

count_enable.signals.values = count_enable_values_run2;

set_param(model,'SimulationMode','software-in-the-loop');

set_param(model,'CodeExecutionProfiling','off');

set_param(model,'CodeProfilingInstrumentation','off');

simout_sil_run2 = sim(model, 'ReturnWorkspaceOutputs', 'on');

Simulink.sdi.createRun('Run 2 (SIL mode)', 'namevalue',...

{'simout_sil_run2'}, {simout_sil_run2});

### Starting build procedure for: rtwdemo_sil_topmodel

### Generated code for 'rtwdemo_sil_topmodel' is up to date because no structural, parameter or code replacement library changes were found.

### Successful completion of build procedure for: rtwdemo_sil_topmodel

Build Summary

Top model targets built:

Model Action Rebuild Reason

==============================================================================

rtwdemo_sil_topmodel Code compiled Compilation artifacts were out of date.

1 of 1 models built (0 models already up to date)

Build duration: 0h 0m 12.723s

### Preparing to start SIL simulation ...

### Starting SIL simulation for component: rtwdemo_sil_topmodel

### Stopping SIL simulation for component: rtwdemo_sil_topmodel

### Completed code coverage analysis

仿真完成后，点击命令行窗口中的链接以打开代码覆盖率报告，并查看累积代码覆盖率结果。只有安装了第三方工具，该链接才可用。

使用代码覆盖率报告中的超链接可以转到模块图中的相应位置。然后，通过使用覆盖率显示窗口，您可以打开模型覆盖率报告的相应部分。比较模型覆盖率和代码覆盖率结果。

仿真数据检查器会自动打开，从而允许以交互方式查看和分析结果。使用 Compare 和 Inspect 窗格确认 SIL 和 Normal 模式记录的信号在两次运行中是相同的。

结语

在此示例中，您执行了下列操作：

在 Normal 模式仿真期间收集模型覆盖率指标。

在 SIL 仿真期间收集代码覆盖率指标。

在代码覆盖率和模型覆盖率报告之间进行导航。

交叉检查两个报告中的各项指标。