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How to get the port types and dimensions for a block

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Kevin
Kevin 2011-6-2
评论： Fabien Jeanneteau Safran 2022-5-11
We are generating code using RTW via a script. I am trying to collect the port dimensions and data types. Argument names would be great too, but not required.
I am currently able to get the port names

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Fangjun Jiang
Fangjun Jiang 2011-6-3
Sometimes it is hard to find help in the document. Many times I just poke around and make an educated guess. I made a simple model and ran the code below. It seems to be able to get the dimension and data types. Hope this will help.
clc;
acModelName=bdroot;
lcInportHandles = find_system(acModelName,'FindAll','On','SearchDepth',1,'BlockType','Inport');
for i=1:length(lcInportHandles)
lcInputDimensions = get_param(lcInportHandles(i),'CompiledPortDimensions');
lcInputDimensions=lcInputDimensions.Outport
lcInputDataTypes = get_param(lcInportHandles(i),'CompiledPortDataTypes');
lcInputDataTypes = lcInputDataTypes.Outport
end
The output looks like this:
lcInputDimensions =
1 2
lcInputDataTypes =
'single'
lcInputDimensions =
1 1
lcInputDataTypes =
'int8'
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Kevin
Kevin 2011-6-3
I am not sure how they were initially created. I know I have three buses, two input and one output, and I need to iterate through all of the elements until I get down to primitive types. Then, these must match the structs which are created in RTW when we build our code.
This probably should be another topic.
Kevin
Kevin 2011-6-3
I moved the next part of this to the following:
http://www.mathworks.com/matlabcentral/answers/8749-how-to-iterate-through-a-bus-object-intil-i-have-a-struct-of-primitives-which-match-rtw-output-with

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更多回答（4 个）

Nirmal Gunaseelan
You can get the dimensions and data types of a block's port after you put the model into a 'compiled' state. The
model([],[],[],'compile')
where model is your model name will get you there. After that, a get_param on the block of interest with the options
CompiledPortDimensions
CompiledPortDataTypes
will get you the info you want.
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Nirmal Gunaseelan
Nirmal Gunaseelan 2011-6-3
'model' in the above snippet is the name of your loaded model. I like to think of it as a way to interact with the model as though it has a function signature.
I have been using this snippet for a long time now, I believe it was there as far back as R14.

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Kevin
Kevin 2011-6-2
@Nirmal Gunaseelan - So, how do I get a pointer to my model in order to execute this? When I do a find_system, I can't figure out how to limit the results to my top-level model that I am building?
Fangjun Jiang
Fangjun Jiang 2011-6-2
Some properties such as dimensions and data types are not up to date when the model is loaded. These properties depend on other information. They also need to be cross-checked to avoid any miss-match. You need to "update" the model or further force the model to be "compiled" to go through those propagation and cross-checking. The command model([],[],[],'compile') is to force that process. model is not a handle. It is the name of your model. The model needs to be loaded. Once the command model([],[],[],'compile') is done. You can use find_system() with 'SearchDepth' to find all the root-level Inport blocks and Output blocks. And then you can get the dimension and data type property of all those Inport/Outport blocks.
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Kevin
Kevin 2011-6-2
CompiledPortWidths: [1x1 struct]
CompiledPortDimensions: [1x1 struct]
CompiledPortDataTypes: [1x1 struct]
CompiledPortComplexSignals: [1x1 struct]
CompiledPortFrameData: [1x1 struct]
The parameter names look correct. Everything looks empty though. I know there is a somewhat complicated bus for the input. Something is wrong - I just don't know what it might be.
Kevin
Kevin 2011-6-2
@Walter - yes, the names vector has two input names and one output name, and they are correct according to the model.

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Kevin
Kevin 2011-6-2
Ok, here is where I am at now...
lcInterfaceSpec = RTW.getEncapsulationInterfaceSpecification(acModelName);
%get handles to our inport/outports
lcInportHandles = find_system(acModelName,'FindAll','On','SearchDepth',1,'BlockType','Inport');
lcOutportHandles = find_system(acModelName,'FindAll','On','SearchDepth',1,'BlockType','Outport');
lcInportNames = get(lcInportHandles,'Name');
lcOutportNames = get(lcOutportHandles,'Name');
lcPortNames = vertcat(lcInportNames, lcOutportNames);
%now, get the dimensions of each of our ports
%code_blocks = find_system(getfullname(acModelName),'LookUnderMasks','all','BlockType','SubSystem','Name','code');
%lcModelHandle = find_system(acModelName,'FindAll','On','SearchDepth',1,'BlockType','SubSystem');
%the following commands require a compiled model...
eval([acModelName,'([],[],[],''compile'');']);
q=get_param(gcb,'PortHandles');
lcInputDimensions = get_param(lcInportHandles,'CompiledPortDimensions');
lcInputDimensions2 = get_param(q.Inport,'CompiledPortDimensions');
lcInputDataTypes = get_param(lcInportHandles,'CompiledPortDataTypes');
lcInputDataTypes2 = get_param(q.Inport,'CompiledPortDataType');
lcInputPortWidths = get_param(lcInportHandles,'CompiledPortWidths');
lcInputPortWidths2 = get_param(q.Inport,'CompiledPortWidth');
lcOutputDimensions = get_param(lcOutportHandles,'CompiledPortDimensions');
lcOutputDataTypes = get_param(lcOutportHandles,'CompiledPortDataTypes');
lcOutputPortWidths = get_param(lcOutportHandles,'CompiledPortWidths');
%first, get the number of arguments
lnArguments = lcInterfaceSpec.getNumArgs;
%loop through args, check the type, and loop through any complex types
for i=1:length(lcPortNames) % should be the same as lnArguments
%todo/fix - how to check types???? ARRRGHHHHH!!!!
lcArgName = getArgName(lcInterfaceSpec, lcPortNames{i});
lcQualifier = getArgQualifier(lcInterfaceSpec, lcPortNames{i}); %const
lcCategory = getArgCategory(lcInterfaceSpec, lcPortNames{i}); %Pointer
lnPosition = getArgPosition(lcInterfaceSpec, lcPortNames{i})
end
So, I found http://www.mathworks.com/help/toolbox/ecoder/ref/rtw.modelcppargsclass.getargqualifier.html some time ago, and just now figured out how to get results out of it. But there is no way to get the data type out of it. I also found that get_param(lcInportHandles,'CompiledPortDataTypes') returns the names of the bus, rather than a real type. I was hoping to get a type like Simulink.BusElement from http://www.mathworks.com/matlabcentral/fileexchange/13399-embedded-coder-robot-nxt-demo/content/ecrobotNXT/nxtracer/param.m, or from here: http://www.mathworks.com/help/toolbox/simulink/ug/f14-90479.html.
So, how do I tell if I have a bus, or a primitive, or something else?
Thanks,
-Kevin
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韵 郝
韵 郝 2021-6-24
@Kevin, the model is stuck and cannot be closed after executing this command "eval([acModelName,'([],[],[],''compile'');']);", how can I stop compiling？
Fabien Jeanneteau Safran
Fabien Jeanneteau Safran 2022-5-11
Hi,
If you are stuck (like me), you should try:
model([],[],[],'term')
I found answer on following page: https://fr.mathworks.com/matlabcentral/answers/29764-turn-off-compile-mode
Regards,
Fabien

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