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

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

Use theC Functionblock to call external C/C++ code from your model. Use theC Functionblock 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.
调用多个C函数中定义您的外部code.
Initialize and work with persistent data cached in the block.

Use theC Functionblock 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 theC Callerblock. To integrate a dynamic system using C code into your Simulink^®model, use theS-Functionblock.

Blocks

C Function

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

Objects

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

Model Settings

Model Configuration Parameters: Simulation Target

Topics

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.

Featured Examples

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.

Open Script

调用c++类方法直接从一个C函数Block

调用c++类方法直接从一个C函数Block.

Open Script

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.

Open Model

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.

Open Script

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 functioncustomSaturateFcn(), 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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