Simulink Package Custom Storage Classes :: Creating and Using Custom Storage Classes (Real-Time Workshop® Embedded Coder™)

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Simulink Package Custom Storage Classes

The Simulink package includes a set of built-in custom storage classes. These are categorized custom storage classes, even though they are built-in, because they extend the storage classes provided by the Real-Time Workshop software. By default, you cannot change the CSCs in the Simulink package, but you can subclass the package and add CSCs to the subclass, following the steps in Resources for Defining Custom Storage Classes.

Some CSCs in the Simulink package are valid for parameter objects but not signal objects and vice versa. For example, you can assign the storage class Const to a parameter but not to a signal, because signal data is not constant. The next table defines the CSCs built into the Simulink package and shows where each of the CSCs can be used.

CSC Name	Purpose	Signals?	Parameters?
`BitField`	Generate a `struct` declaration that embeds Boolean data in named bit fields.	Y	Y
`CompilerFlag`	Supports preprocessor conditionals defined via compiler flag. See Generating Code Variants for Variant Models.	N	Y
`Const`	Generate a constant declaration with the `const` type qualifier.	N	Y
`ConstVolatile`	Generate declaration of volatile constant with the `const volatile` type qualifier.	N	Y
`Default`	`Default` is a placeholder CSC that the code generator assigns to the `RTWInfo.CustomStorageClass` property of signal and parameter objects when they are created. You cannot edit the default CSC definition.	Y	Y
`Define`	Generate `#define` directive.	N	Y
`ExportToFile`	Generate header (`.h`) file, with user-specified name, containing global variable declarations.	Y	Y
`GetSet`	Supports specialized function calls to read and write the memory associated with a Data Store Memory block. See GetSet Custom Storage Class for Data Store Memory.	Y	Y
`ImportedDefine`	Supports preprocessor conditionals defined via legacy header file. See Generating Code Variants for Variant Models.	N	Y
`ImportFromFile`	Generate directives to include predefined header files containing global variable declarations.	Y	Y
`Struct`	Generate a `struct` declaration encapsulating parameter or signal object data.	Y	Y
`Volatile`	Use `volatile` type qualifier in declaration.	Y	Y

Resources for Defining Custom Storage Classes

Creating Packages that Support CSC Definitions

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