How to find number of input and output ports of an unknown simulink model ?

Question

Shiv Nileshkumar Matliwala 2022-11-24

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https://ww2.mathworks.cn/matlabcentral/answers/1861728-how-to-find-number-of-input-and-output-ports-of-an-unknown-simulink-model

评论： Chong Wang 2023-6-19

I have three different simulink models Model1, Model2 and Model3. Now I am adding these all models into one single blank Model.

Here, I dont know that how many input ports are there and how many output ports are there.

So to connect the Model1, Model2 and Model3, I need to identify first how many input ports and output ports are there in these all three models Model1, Model2, Model3.

Then suppose first model has input ports like A and B and The second model has output ports like A and E

Then I want to do the 'for' loop which will one by one check all the input ports with all the output ports and when the port name like A matches with any output port name A then that input port and output port should be connected.

Everything I need to do it with matlab script.

so, any idea How to do this or any suggetions how can I find the total number of input and output ports of the simulink model ?

Please help me in this.

Thank you.

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Answer 1

Paul 2022-11-24

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https://ww2.mathworks.cn/matlabcentral/answers/1861728-how-to-find-number-of-input-and-output-ports-of-an-unknown-simulink-model#answer_1110963

在 MATLAB Online 中打开

Hi Shiv,

I started out with this model with three subsystems.

Then I ran this code:

% Handles to the subsystems
subsystems  = find_system(get_param(gcs,'Handle'),'BlockType','SubSystem');
% Handes to the Inport blocks of the subsystems
inports     = find_system(subsystems,'BlockType','Inport');
% Names of the Inport blocks of the subsystems
inportnames = get_param(inports,'Name');
% Handles to the Outport blocks of the subsystems
outports     = find_system(subsystems,'BlockType','Outport');
% Names of the Outport blocks of the subsystems
outportnames = get_param(outports,'Name');
% Cell array of structures of port handles to the ports of the subsystems
porthandles = get_param(subsystems,'PortHandles');
% Convert to structure array
porthandles    = [porthandles{:}];
% Vector of handles to the input ports
inporthandles  = [porthandles.Inport];
% Vector of handles to the output ports
outporthandles = [porthandles.Outport];
% match up the port names. Assumes any matches between inport names and outport names are 1-to-1
[Lia,LocB]=ismember(inportnames,outportnames);
% connect the ports
add_line(gcs,outporthandles(LocB(Lia)),inporthandles(Lia));

The result was this model

Maybe this code can be adapted to your needs.

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Shiv Nileshkumar Matliwala 2022-11-29

编辑：Shiv Nileshkumar Matliwala 2022-11-29

Hello Paul,

sorry to again disturb you. I had one doubt. Like the above system with two inputs and two outputs, three models were there. but now when I want to make a generalized code, I need to implement for loop for whatever number of model available. So in that case,

I have a structure of models. So, I made one for loop like below first,

for i=1:model_n

load_system(S.ModelConfig.Components.Model{1, i}.Text)

model_name(i,:) = get_param(load_system(S.ModelConfig.Components.Model{1, i}.Text),'Name');

models_available(i,:) = find_system(load_system(S.ModelConfig.Components.Model{1, i}.Text),'BlockType','SubSystem');

end

in this, three model_name which are Model1,Model2 and Model3 are stored. and Inside all these models there are subsystems available which I am storing in models_available as names Model1, Model2 and Model3

Now I want to implement the second loop of adding these above blocks (models_available) into my new system. but as we give source location Model1/Model1 and destination location as New_Model/Model1, I want to implement the for loop for adding the block. So can you please help me how can I make this correct ?

%setting initial position of first block

l=300

t=150

width = 60

height = 50

for i=1:length(models_available)

add_block([model_name(i,:),get_param(find_system(model_name(i,:),'BlockType','SubSystem'),'Name')],[file_name,get_param(models_available(i),'Name')],'Position',[l t l+width t+height]);

[l t a b]=get_param([file_name,strings('Model_%d',i)],'Position')

end

I have implemented this code but when i run

[model_name(i,:)/get_param(find_system(model_name(i,:),'BlockType','SubSystem'),'Name')]

It is giving me output as Model1 Model1 instead of Model1/Model1. and same for destination location I guess.

Shiv Nileshkumar Matliwala 2022-12-12

Hello Paul,

I just need some help from you. Can yu please tell me how can I get the data type of a signal in simulink model programmatically ??

for example, I have 2 signals A and B between Bus selector and bus creator blocks in simulink model. Now I want to find the data type of signals A and B.

Can you suggest me how can I find this data types and how can I set that with 'Boolean' ?

Chong Wang 2023-6-19

cool

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Answer 2

Florian Bidaud 2022-11-24

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https://ww2.mathworks.cn/matlabcentral/answers/1861728-how-to-find-number-of-input-and-output-ports-of-an-unknown-simulink-model#answer_1110648

编辑：Florian Bidaud 2022-11-24

在 MATLAB Online 中打开

Hi,

You need to use the function get_param with 'Ports' as a parameter, for each subsystem of your model.

The first and second element of the array will give you the input and output ports numbers

load_system('system.slx')
ports_data = get_param('system/Subsystem','Ports')
input_ports_number = ports_data(1)
output_ports_numer = ports_data(2)

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Shiv Nileshkumar Matliwala 2022-11-24

I had one more doubt that if i have one unknown simulink model for which i dont dont how many blocks are there. So is there any way I can find like how many blocks are there inside the simulink model ??

Florian Bidaud 2022-11-24

在 MATLAB Online 中打开

Yes, you can again use :

length(get_param('yourSimulinkSystem','Blocks'))

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