How to connect ports with system composer using the dot notation for buses programmatically?

Hi! I would like to connect ports like in the picture below, using the bus dot notation.

Note that message1 and message2 are signals within a bus.

I am able to do it by hand, how to do it programmatically?

Thanks!

Answer 1

[Josh Kahn]

Hi @Enrico,

Use the SourceElement and DestinationElement arguments of the connect API:

https://www.mathworks.com/help/systemcomposer/ref/systemcomposer.arch.architecture.connect.html

Regards,

Josh

[Enrico]

Hi! Thanks for the answer!

Can you make a code example given the picture in my question?

Best regards,

Enrico

[Josh Kahn]

Sure:

archModel = systemcomposer.createModel('MyArchitecture');
open(archModel);

interfaceDictionary = archModel.InterfaceDictionary;
interfaceMyInterface = addInterface(interfaceDictionary, 'MyInterface');
addElement(interfaceMyInterface, 'M1');
addElement(interfaceMyInterface, 'M2');

rootArchitecture = archModel.Architecture;
architecturePortMessageBus = addPort(rootArchitecture, 'MessageBus', 'in');
setInterface(architecturePortMessageBus, interfaceMyInterface);

componentMessageProcessing = addComponent(rootArchitecture, 'MessageProcessing');
architecturePortM1 = addPort(componentMessageProcessing.Architecture, 'M1_In', 'in');
architecturePortM2 = addPort(componentMessageProcessing.Architecture, 'M2_In', 'in');

componentPortM1 = getPort(componentMessageProcessing, 'M1_In');
componentPortM2 = getPort(componentMessageProcessing, 'M2_In');

connect(architecturePortMessageBus, componentPortM1, SourceElement='M1');
connect(architecturePortMessageBus, componentPortM2, SourceElement='M2');

[Enrico]

Thank you so much.

I am just wondering: in my hand-done solution I didn't modify the interfaces of my model. Actually my model doesn't have any ínterface dictionary at all.

Is it possible to do it via a script in the same way? I mean without the use of interfaces.

Thanks!

Enrico

[Josh Kahn]

Hi Enrico,

It will work without defining a shared interface too.. The only difference is that it automatically adds the elements to the port as an owned interface (defined locally on the port instead of a data dictionary).

By the way, all architecture models have interface dictionaries, either stored locally within the model (default) or linked to an external dictionary. The added benefit of using an external dictionary is that if a change is made, it will automatically propagate to all models that are referencing that dictionary (single source of truth).

Josh

archModel = systemcomposer.createModel('MyArchitecture');
open(archModel);

% interfaceDictionary = archModel.InterfaceDictionary;
% interfaceMyInterface = addInterface(interfaceDictionary, 'MyInterface');
% addElement(interfaceMyInterface, 'M1');
% addElement(interfaceMyInterface, 'M2');

rootArchitecture = archModel.Architecture;
architecturePortMessageBus = addPort(rootArchitecture, 'MessageBus', 'in');
% setInterface(architecturePortMessageBus, interfaceMyInterface);

componentMessageProcessing = addComponent(rootArchitecture, 'MessageProcessing');
architecturePortM1 = addPort(componentMessageProcessing.Architecture, 'M1_In', 'in');
architecturePortM2 = addPort(componentMessageProcessing.Architecture, 'M2_In', 'in');

componentPortM1 = getPort(componentMessageProcessing, 'M1_In');
componentPortM2 = getPort(componentMessageProcessing, 'M2_In');

connect(architecturePortMessageBus, componentPortM1, SourceElement='M1');
connect(architecturePortMessageBus, componentPortM2, SourceElement='M2');

[Andrea]

Hi Josh, I have a further question regarding these architecture ports and dot notation for buses. I have a simple architecture, and I want to create an Input/Output excel file automatically through a Matlab script.

My problem is that I cannot find a way to get which PDU inside the CAN1 bus is connected to which PDU in CAN2. This is, I cannot get the connections I made inside the MappingBlock. Through Matlab commands I am able to get all the ports and all the components, and inside I can see the connections between CAN1 and the CAN2 PDUs, but not the specific CAN1 PDUs that are linked to the ones in CAN2. Also I am able to see which CAN1 PDUs are selected, however not to which CAN2 PDUs they are connected. Could you help me with this?

modelName = "Arch";
model = systemcomposer.openModel(modelName);
arch = get(model, modelName);
load_system(modelName);
open_system(modelName);
MappingBlock = arch.Components(1,3);

[Josh Kahn]

Hi Andrea,

Let me know if these get you what you need:

https://www.mathworks.com/help/systemcomposer/ref/systemcomposer.arch.connector.getsourceelement.html

https://www.mathworks.com/help/systemcomposer/ref/systemcomposer.arch.connector.getdestinationelement.html

Josh