How to programmatically test how many time a Simulink function is called in Simulink function?
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In simulink, I'm using test harness to test a matlab funciton block which has matlab function call within the code. However, beside able to see the function call occurance and parameter in sequence viewer, I have not find a way to monitor event through command. The reason for this need is that I want to create a test sequence that verify if at certain moment and function is called correctly.
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Gojo
2024-10-19
Hey Wei,
I understand that you want to track the number of function calls being made to check if the function is being called correctly by creating a test sequence.
To programmatically test how many times a Simulink function is called within a MATLAB function block, you can do the following:
- Modify your MATLAB function to include a persistent counter that increments each time the function is called.
function y = myFunction(u)
persistent callCount;
if isempty(callCount)
callCount = 0;
end
callCount = callCount + 1;
y = u; % Your function logic here
assignin('base', 'callCount', callCount); % Save the count to the base workspace
end
- The persistent keyword in MATLAB allows the variable callCount to retain its value between function calls.
- Also, the assignin function is used to save the desired value into base workspace.
- Use a MATLAB script to run the simulation and check the value of the counter after the simulation completes. For this purpose, you can use the evalin function:
% Load the model
load_system('your_model');
% Run the simulation
sim('your_model');
% Retrieve the call count from the base workspace
callCount = evalin('base', 'callCount');
disp(['The function was called ', num2str(callCount), ' times.']);
- Once you have the count of function calls made in your base workspace, you can create a test sequence and assert if the call count matches the expected value.
I hope this would help!
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