Export AUTOSAR Architecture ECU Extract

You can export ECU extracts from compositions in an AUTOSAR classic architecture model. ECU extracts are an important input to AUTOSAR ECU configuration. In an AUTOSAR classic architecture, a top-level composition can model the software components mapped to one AUTOSAR ECU. To create a software description of the ECU-scoped system, you export an ECU extract from the composition.

Export AUTOSAR Architecture

In an open architecture model, you can export ARXML by using the Simulink® Toolstrip, the software architecture canvas, or the export function. For example, from the Modeling tab, select Share > Generate Code and Export ARXML. In the Export Composition dialog box, select the option Export ECU extract. To begin the export, click OK.

To generate the ECU extract, the software automatically maps the software components in the composition to an ECU. If the composition contains nested compositions, the software uses a flattened version of the composition hierarchy, containing only components. For example, programmatically export an ECU extract for the AUTOSAR example architecture model autosar_tpc_composition, which contains a nested composition by using the following commands.

% Open and export AUTOSAR architecture model, generating ECU extract
archModel = "autosar_tpc_composition";
openExample(archModel);
export(archModel,"ExportECUExtract",true);

ECU Extract File Generation

The export function call generates the ECU extract into the file System.arxml, which is located in the composition folder. The ECU extract for autosar_tpc_composition maps components from both the top-level composition and a nested Sensors composition to one ECU.

<SYSTEM UUID="...">
    <SHORT-NAME>EcuExtract</SHORT-NAME>
    <CATEGORY>ECU_EXTRACT</CATEGORY>
    <MAPPINGS>
        <SYSTEM-MAPPING UUID="...">
            <SHORT-NAME>SystemMapping</SHORT-NAME>
            <SW-MAPPINGS>
                <SWC-TO-ECU-MAPPING UUID="...">
                    <SHORT-NAME>SwcToEcuMapping</SHORT-NAME>
                    <COMPONENT-IREFS>
                        <COMPONENT-IREF>
                            <TARGET-COMPONENT-REF DEST="SW-COMPONENT-PROTOTYPE">
                              /Components/TPC_Composition/Ctrl
                            </TARGET-COMPONENT-REF>
                        </COMPONENT-IREF>
                        ...
                        <COMPONENT-IREF>
                            <TARGET-COMPONENT-REF DEST="SW-COMPONENT-PROTOTYPE">
                              /Components/TPC_Composition/PedalSensor
                            </TARGET-COMPONENT-REF>
                        </COMPONENT-IREF>
                    </COMPONENT-IREFS>
                    <ECU-INSTANCE-REF DEST="ECU-INSTANCE">
                      /System/EcuInstance
                    </ECU-INSTANCE-REF>
                </SWC-TO-ECU-MAPPING>
            </SW-MAPPINGS>
        </SYSTEM-MAPPING>
    </MAPPINGS>
    <ROOT-SOFTWARE-COMPOSITIONS>
        <ROOT-SW-COMPOSITION-PROTOTYPE UUID="...">
            <SHORT-NAME>RootSwCompositionPrototype</SHORT-NAME>
            <SOFTWARE-COMPOSITION-TREF DEST="COMPOSITION-SW-COMPONENT-TYPE">
              /Components/TPC_Composition
            </SOFTWARE-COMPOSITION-TREF>
        </ROOT-SW-COMPOSITION-PROTOTYPE>
    </ROOT-SOFTWARE-COMPOSITIONS>
</SYSTEM>

<ECU-INSTANCE UUID="...">
    <SHORT-NAME>EcuInstance</SHORT-NAME>
</ECU-INSTANCE>

To specify the AUTOSAR package path for the system package that contains the ECU extract, use the composition XML option System Package. To view the System Package path value, from the Modeling tab, select Share > Configure XML Options.

Alternatively, configure the AUTOSAR system package path by using the AUTOSAR property functions get and set.

openExample("autosar_tpc_composition");
arProps = autosar.api.getAUTOSARProperties("autosar_tpc_composition");
set(arProps,"XmlOptions","SystemPackage","/System");
systemPackage = get(arProps,"XmlOptions","SystemPackage");

For more information about the hierarchical AUTOSAR package structure, see Configure AUTOSAR Packages.

See Also

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