Define Safety Levels for AUTOSAR Architecture Model Elements

Define safety levels according to the ASIL (Automotive Safety Integrity Level) risk classification system defined by ISO 26262 standard in AUTOSAR Blockset architecture models.

AUTOSAR Blockset enables you to define safety levels for these elements.

• Component

• Port of a component

• Runnable of a component

• Composition

You can export ASIL specifications to an ARXML file, import an ARXML file containing ASIL specifications to a Simulink^® model, and set the ASIL information on an imported model.

Configure ASIL Safety Level

Configure ASIL safety levels in AUTOSAR architecture models by using the Profile Editor, Property Inspector, and Functions Editor. You can programmatically configure ASIL safety levels by using the systemcomposer.arch.Model (System Composer) object.

1. Open an AUTOSAR architecture model. You can open an example model using this command

   openExample("autosar_tpc_composition")

2. Import an ASIL profile from the architecture toolstrip. On the Modeling tab select Profile Editor > Import Profile > ASIL Profile.

   

   Alternatively, you can import the ASIL profile by using the applyProfile (System Composer) function.

   model = systemcomposer.loadModel("autosar_tpc_composition");
   model.applyProfile('ASILProfile');

3. To configure the stereotype of the ASIL Profile open the Property Inspector. In the Stereotype field select ASILProfile.SafetyIntegrityLevel.

   

   Alternatively, you can apply the stereotype to the profile by using the applyStereotype (System Composer) function.

   model.Architecture.applyStereotype("ASILProfile.SafetyIntegrityLevel");

4. To set individual ASIL levels for the composition, components, and ports begin by selecting an element in the canvas. In the Property Inspector, select ASILProfile.SafetyIntegrityLevel from the Stereotype drop down menu. Then expand the SafetyIntegrityLevel section and select the desired level from the ASIL drop down menu.

   Alternatively, you can set individual ASIL levels by using the setProperty (System Composer) function.

   model.Architecture.setProperty('ASILProfile.SafetyIntegrityLevel.ASIL',"'C'");

5. To set the ASIL level for a runnable, select the runnable in the Functions Editor and specify the ASIL level.

   

The ASIL levels are exported to ARXML. For example, in the generated code for TPC_Composition the ASIL level is set to C.

<COMPOSITION-SW-COMPONENT-TYPE UUID="cb0c3c21-cbda-57f7-05b2-b445bad7c0eb">
    <SHORT-NAME>TPC_Composition</SHORT-NAME>
    <ADMIN-DATA>
        <SDGS>
            <SDG GID="SAFEX">
                <SD GID="ASIL">C</SD>
            </SDG>
        </SDGS>
    </ADMIN-DATA>

The ASIL level specified for a component is applicable for the ports present in the component. You can override the ASIL level of a port by selecting the port and specifying the ASIL level.