Integrate Custom HDL Code by Using DocBlock - MATLAB & Simulink (original) (raw)

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You can use one or more DocBlock blocks to integrate custom HDL code into your design.

When to Use DocBlock for Integrating Custom Code

If you want to keep the HDL code in your model, instead of as a separate file, use aDocBlock to integrate custom HDL code. The text in theDocBlock is your custom VHDL®, Verilog® or SystemVerilog code.

You include each DocBlock that contains custom HDL code by placing it in a black box subsystem, and then including the black box subsystem in your design under test (DUT). One HDL file is generated for each black box subsystem.

Alternatives for Custom Code Integration

If you want to keep your custom HDL code separate from your model, such as when the custom code is intellectual property (IP) or a library from a third party vendor, use ablack box subsystem or black box model reference.

Use DocBlock to Integrate Custom Code

  1. In your DUT, at any level of hierarchy, add aSubsystem block.
  2. For the Subsystem block, in the HDL Block Properties dialog box:
  3. In the subsystem, add a DocBlock block.
  4. For the DocBlock, in the HDL Block Properties dialog box:
    • Set Architecture toHDLText.
    • Set TargetLanguage to your target language, such asVerilog, SystemVerilog or VHDL.
  5. In the DocBlock, enter the HDL code for your custom Verilog or SystemVerilog module, or VHDLentity.
    The language must match the DocBlock TargetLanguage setting.

Restrictions

Include Custom HDL Code Using Doc Block

The hdlcoderIncludeCustomHdlUsingDocBlockExample model shows how to integrate custom VHDL and Verilog code into your design with the DocBlock block.

To open hdlcoderIncludeCustomHdlUsingDocBlockExample model, run these commands:

load_system('hdlcoderIncludeCustomHdlUsingDocBlockExample.slx'); open_system('hdlcoderIncludeCustomHdlUsingDocBlockExample/DUT');

The LegacyCodeSubs subsystem has two DocBlock blocks which contains legacy VHDL and Verilog code. You can generate the HDL code of the DUT subsystem by using makehdl command.

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