System Objects

Predefined and user-defined System object™ support for HDL code generation

A System object is a specialized MATLAB^® object that you can use to implement or simulate dynamic systems with inputs that change over time.

With HDL Coder™, you can use predefined or user-defined System objects during code generation in MATLAB. System objects have these advantages:

Reuse of Components: Save time during design and testing by using existing System object components.
Customization: Design and qualify custom System objects for reuse in multiple designs.
Algorithm Definition: Define your algorithm in a System object once, and reuse multiple instances of it in a single MATLAB design.
Modularity and Readability: HDL code that you generate from System objects is modular and readable.

You can use the predefined System objects available with MATLAB, DSP System Toolbox™, and Communications Toolbox™ to generate HDL code. For more information, see Predefined System Objects Supported for HDL Code Generation.

To learn more about creating user-defined System objects for HDL code generation, see Generate Code for User-Defined System Objects.

Functions

`hdl.RAM`	Single, simple dual, dual, true dual, or simple tri-port RAM for memory read/write access
`hdl.BlackBox`	Black box for including custom HDL code
`hdl.Delay`	Delay input signal by number of samples (Since R2021a)
`hdl.TappedDelay`	Delay input signal and output all delayed versions (Since R2021a)

HDL Code Generation for System Objects
System object support for HDL code generation.
Predefined System Objects Supported for HDL Code Generation
List of predefined System objects for HDL code generation.
Generate Code for User-Defined System Objects
How to create user-defined System objects and generate HDL code.
Integrate Custom HDL Code Into MATLAB Design
Include pre-existing HDL code in your MATLAB design.

Generate HDL code from MATLAB® code that contains System objects. For more information on System objects, see HDL Code Generation for System Objects.

Use persistent variables and System objects to model state and delays in a MATLAB® design for HDL code generation.

Generate HDL code from MATLAB® code from hdl.RAM System object™ in MATLAB and infer RAM in generated hardware.

Check, generate and verify HDL code from MATLAB® code that instantiates a non-restoring square root System object™.

Check, generate and verify HDL code from MATLAB® code that instantiates a Viterbi Decoder System object™.