Donn_shull asked . 2021-09-22

Create Variant object based on Configuration Reference

Hi all

I have a structure of models and model references, which all use the very same Configuration Reference object as their Configuration Parameters set. By changing the Configuration Reference, I can change the Configuration Parameters for all models at once. This Configuration Reference object and those Configuration Parameter sets are located inside a Data Dictionary, to which all models have access to.

I am using Variant Subsystems inside my models, and I want to make those variants based on which selection I make in the Configuration Reference object. (To which Configuration Parameter set I am pointing it to basically.) So I wanted to create a Simulink.Variant object, and as a condition I want to make a check of the Configuration Reference. For example, I want to see if the 'SystemTargetFile' is equal to 'ert.tlc'.

The problem I am having is how to write an expression for the Simulink.Variant object to get info from the Configuration Reference object?

I have used the following expression succesfully before:

strcmp('ert.tlc',get_param('mymodel','SystemTargetFile'))

but it requires to provide the model name as an argument. Since I need to use this Simulink.Variant object for all my models, I cannot provide the model name since it will be different many times.

I have tried the following expression:

strcmp('ert.tlc',get_param(Configuration_set,'SystemTargetFile'))

but it cannot find the Configuration Reference object called 'Configuration_set', although the Variant object and the Configuration Reference object are inside the same Data Dictionary.

variant objects , configuration refe...

Expert Answer

Prashant Kumar answered . 2024-12-21 00:45:45

Your variant expression cannot find your configuration object because variant object and the configuration object are in different Dictionary sections.

You could trysomething messy like storing a string with the name of your data dictionary in the 'Design Data' section:

thisDataDictionary = 'MyDataDictionary.sldd'

Then use an expression like

strcmp('grt.tlc', get_param(Simulink.data.dictionary.open(thidDataDictionary).getSection('Configurations').getEntry('Configuration_set').getValue, 'SystemTargetFile'))

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