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Enable Coverage and Select Metrics

Before you analyze coverage results for your model, you need to enable coverage and decide which coverage metrics you want to see.

Open the Model

Open the slvnvdemo_powerwindow model. The slvnvdemo_powerwindow model contains a power window controller and a low-order plant model. The controller is implemented with a Stateflow® chart.

Choose Your Coverage Metrics

On the Apps tab, select Coverage Analyzer. Then, on the Coverage tab, click Settings to open the Configuration Parameters window. In the left pane, click Coverage. Select Enable coverage analysis. By default, the scope of the coverage analysis is set to Entire system. If you want to collect coverage data for a specific referenced model or subsystem, select your desired coverage scope and click Select Models or Select Subsystem. For this example, select Entire system.

The Structural coverage level parameter has four settings:

  • Block Execution

    Whether each block is executed during simulation.

  • Decision

    Analyzes decision points in your model. A decision is a place in your model where one or more input signals decide the output signal of a block. Selecting Decision coverage also collects Block Execution coverage.

  • Condition Decision

    Analyzes blocks that output the logical combination of their input. A condition is a Boolean expression that does not contain Boolean operators. Selecting Condition Decision coverage also collects Block Execution coverage.

  • Modified Condition Decision Coverage (MCDC)

    MCDC is condition decision coverage, except each condition must independently affect the decision outcome. Selecting Modified Condition Decision Coverage (MCDC) also collects Condition Decision and Block Execution coverage.

For this example, set Structural coverage level to Modified Condition Decision Coverage (MCDC).

For a full list of coverage metrics, including advanced metrics, see Types of Model Coverage.

Command-Line Information

You can also perform the steps in this example programmatically. Use sim with a Simulink.SimulationInput object to set the coverage model parameters for a simulation.

modelName = 'slvnvdemo_powerwindow';
simIn = Simulink.SimulationInput(modelName);
simIn = setModelParameter(simIn,'CovEnable','on');
simIn = setModelParameter(simIn,'CovScope','EntireSystem');
simIn = setModelParameter(simIn,'CovMetricStructuralLevel','MCDC');
simIn = setModelParameter(simIn,'CovSaveSingleToWorkspaceVar','on');
simIn = setModelParameter(simIn,'CovSaveName','covData');

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