External Component Interfaces

Integrate the external components like custom HDL code and vendor-specific AMD or Intel blocks

HDL Coder™ allows you to integrate the external components like custom HDL code and vendor-specific blocks to your design.

Use DocBlock blocks to add your custom HDL code to the design and create a black box interface. The black box interface enables you to create an interface for existing manually written HDL code, third-party IP, or code generated by HDL Coder.
Build a model using performance-optimized AMD^® or Intel^® blocks and generate integrated HDL code. Leverage third-party tools such as AMD Vitis Model Composer or DSP Builder for Intel FPGAs alongside HDL Coder to integrate various vendor-specific HDL blocks with Simulink^® blocks in your design.

Topics

Pass-Through and No-Op Implementations
Bypassing or omitting selected subsystems in generated code.

Integrate Custom HDL Code by Using DocBlock
Integrate custom HDL code using the DocBlock block.
Generate Black Box Interface for Subsystem
How to generate an interface to existing or legacy HDL code from a subsystem.
Generate Black Box Interface for Referenced Model
Specify a black box implementation for the Model block when you already have legacy or manually-written HDL code.
Specify Bidirectional Ports
Specify bidirectional ports for a black box.
Customize Black Box or HDL Cosimulation Interface
How to use block implementation parameters to control generation and naming of ports and other attributes of the generated interface.
Generate Cosimulation Model
Automatically generate a Simulink model that cosimulates with your HDL simulator.

Generate Code for AMD Blocks by Using AMD Vitis Model Composer
Generate HDL code for the model that contains AMD blocks by using AMD Vitis Model Composer. (Since R2025a)
Create an Altera DSP Builder Subsystem
Code generation from a model using both Altera^® DSP Builder and HDL Coder.

Use Xilinx® System Generator for DSP with HDL Coder™.

Use the Altera® DSP Builder Advanced Blockset with HDL Coder™.

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