Data store memory storage class

I have a model containing a data store that I have to convert to C code. I would like to set the "Storage class" attribute of the data store to ExportedGlobal in order to have it defined as a global variable in the corresponding C code, however I cannot find this parameter in the mask of the Data store Memory block. Where can I find this property? Is there a different way to force some variable in the generated code to be global?

Answer 1

[Fangjun Jiang]

Create a Simulink.Signal object in the workspace and you can use DataStore Read/Write block anywhere in the model. You can speify the storage class in the signal object. This is the same as create a DataStoreMemory block in the root level of your model.

If the DataStoreMemory block is in a subsystem, check the option "data store name must resolve to simulink signal object" in its dialog to link to the signal object.

see https://www.mathworks.com/help/releases/R2020b/simulink/ug/using-global-data-with-the-matlab-function-block.html#bsgs3fa-1