How to get_param list on subsystem blocks inport and outports

Hi Guys,

I am trying how to figure out how to generate a list of a subsystems inports and outport names. This should be a list of the names that are listed on the block, not what is connected to it. I have been trying various things, and the closest I can get is to have get_param tell me how many inputs and how many output ports there are, but no signal names.

Thanks for the help.

[Kaustubha Govind]

Do you mean the port labels on the subsystems? Are these masked subsystems (in which case the port labels are specified on the Mask) or un-masked subsystems, where the ports labels are inferred from the names of the top-level inport and outport blocks.

[Michael]

Example: I want a command that will give me "Position" "Velocity" and "Accel" (the inport names) and a command that gives me "Voltage" (the outport name). Assuming that I am using the default "Subsystem" block in simulink.

Answer 1

[Purshottam Vishwakarma]

simBlockH = get_param(gcb, 'Handle');
handles = find_system(simBlockH, 'LookUnderMasks', 'on', 'FollowLinks', 'on', 'SearchDepth', 1, 'BlockType', 'Inport');
portNames = cellstr(get_param(handles, 'Name'))

[Dipesh007]

Hello Purshottam,

Thanks for the solution it help me.

Now how can i export these Inport from command window to xls using mscript.

Thanks in advance.

Answer 2

[Chetan Aswathanarayana]

You can try the below: Say your Model is Sample.mdl:

open_system('Sample');
blks = find_system('Sample','Type','block');
N = get_param(blks, 'BlockType');
j = 1;
k = 1;
for i = 1:length(N)
if ( strcmp(N{i},'Inport'))
In{j} = blks{i};
In{j} = strrep(In{j},'Sample/Subsystem/',[]);
j = j + 1;
elseif ( strcmp(N{i}, 'Outport'))
Out{k} = blks{i};
Out{k} = strrep(Out{k},'Sample/Subsystem/',[]);
k = k + 1;
end
end

In and Out are the 2 ouput cell arrays, which gives what you are looking for:

>> In

In = 

      'Position'    'Velocity'    'Accel'

>> Out

Out = 

      'Voltage'

[Miriam]

I have the same problem, but the solution isn't working. N is just a 1x1 cell containig the string SubSystem.

Is there something wrong with my subsystem?

[Miriam]

Ah, I see, I have to allow him to look under the mask :D

[vvd03]

Hello! How realise it for masked subsystem? I see that it work for unmasked subsystem. How to allow him to look under the mask?

[vvd03]

Oh! Sorry! I need this command:

... = find_system(...,'LookUnderMasks','all',...)

Answer 3

[Chetan Aswathanarayana]

Hi Michael, If I understand your question correctly , you are looking to get the Input and Output Signal names.Then you can try the below:

    >>model = 'Sample';
    >>blks = find_system(model,'Type','block')
    blks = 

        'Sample/In1'
        'Sample/Unit Delay'
        'Sample/Out1'
  >>N = get_param(blks, 'BlockType')
  istblks = 

      'Inport'
      'UnitDelay'
      'Outport'

The above gives the names for the list of all the blocks. And 'N' tells you which of the blocks are inports and outports.

[Michael]

Example: I want a command that will give me "Position" "Velocity" and "Accel" (the inport names) and a command that gives me "Voltage" (the outport name). Assuming that I am using the default "Subsystem" block in simulink.