Integrate External C/C++ Code Using C Function Blocks

Integrate and call external C/C++ code from a Simulink model

Use the C Function block to call external C/C++ code from your model. Use the C Function block to:

Write C code to preprocess data to call a C function. Similarly, you can write C code to postprocess data after calling a C function.
Specify different code for simulation and code generation.
Call multiple C functions defined in your external code.
Initialize and work with persistent data cached in the block.

Use the C Function block in cases where you need to allocate and deallocate memory, preprocess and postprocess external code symbols, or initialize and terminate persistent data. To call simple C code, use the C Caller block. To integrate a dynamic system using C code into your Simulink^® model, use the S-Function block.

Blocs

C Function

Integrate and call external C/C++ code from a Simulink model

Objets

`SymbolSpec`	Query and configure C Function block data symbols
`Symbol`	C Function block data symbol

Paramètres du modèle

Model Configuration Parameters: Simulation Target

Rubriques

Integrate External C/C++ Code into Simulink Using C Function Blocks

Integrate and modify external C Code using C Function blocks.
Interface with C++ Classes Using C Function Block
Use C Function block to interface directly with C++ classes defined in custom code.
Debug Custom C/C++ Code
Debug custom C/C++ code from within Simulink.

Exemples présentés

Start and Terminate Actions Within a C Function Block

Use the C Function block to integrate legacy C functions that have start and terminate actions.

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Call C++ Class Methods Directly from a C Function Block

Call C++ Class Methods Directly From a C Function Block.

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Call C++ Class Methods Using a C-style Wrapper Function from a C Function Block

Use the C Function block to call C++ class methods using a C-style wrapper function.

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Call Legacy Lookup Table Functions Using C Function Block

Use the C Function block to call legacy C functions that implement N-dimensional table lookups.

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Use C Function Block Within For Each Subsystem

Use a C Function block within a For Each subsystem. The example passes a vector signal into the For Each subsystem, which repeats execution of the C Function block on each element of the input signal and concatenates the results. The C Function block calls the custom code function customSaturateFcn(), which implements a saturation algorithm and outputs a clipped version of the input signal. A C Caller block with the same settings can also be used in place of a C Function block in a For Each subsystem.

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