Implement Algorithms Using Legacy Code Tool

Integrate existing C or C++ functions, such as device drivers or external simulation code

You can integrate existing C (or C++) functions, such as device drivers, lookup tables, and general functions and interfaces, into Simulink® models by using the Legacy Code Tool. Use the Legacy Code Tool to specify the name of the S-function, files, and path required for the compilation, and options for the generated S-function.

Use the legacy_code function to generate an S-function, compile and link the generated S-function, and create a mask for calling the generated S-function.

Before you can use legacy_code, ensure that a C compiler is set up for your MATLAB® installation.

Functions

legacy_codeUse Legacy Code Tool

Topics

Integrate C Functions Using Legacy Code Tool

Use the Legacy Code Tool to generate S-functions automatically from existing C code.

S-Functions Incorporate Legacy C Code

Incorporate legacy C code using a handwritten C MEX S-function, the S-Function Builder, and the Legacy Code Tool.

Integrate C Code Using the MATLAB Function Block

Use MATLAB Function block to call external C code and how to control enumeration and bus typedefs.

Featured Examples

Inputs Passed by Value or Address to Legacy Functions

Inputs Passed by Value or Address to Legacy Functions

Use the Legacy Code Tool to integrate legacy C functions that pass their input arguments by value versus address.

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Output Passed by Return Argument from Legacy Functions

Output Passed by Return Argument from Legacy Functions

Use the Legacy Code Tool to integrate legacy C functions that pass their output as a return argument.

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Fixed Point Signals in Legacy Functions

Fixed Point Signals in Legacy Functions

Use the Legacy Code Tool to integrate legacy C functions that pass their inputs and outputs using signals of fixed point data type.

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Fixed Point Parameters in Legacy Functions

Fixed Point Parameters in Legacy Functions

Use the Legacy Code Tool to integrate legacy C functions that pass their inputs and outputs using parameters of fixed point data type.

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Lookup Tables Implemented in Legacy Functions

Lookup Tables Implemented in Legacy Functions

Use the Legacy Code Tool to integrate legacy C functions that implement N-dimensional table lookups.

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Start and Terminate Actions Within Legacy Functions

Start and Terminate Actions Within Legacy Functions

Use the Legacy Code Tool to integrate legacy C functions that have start and terminate actions.

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Using Buses with Legacy Functions Having Structure Arguments

Using Buses with Legacy Functions Having Structure Arguments

Use the Legacy Code Tool to integrate legacy C functions with structure arguments using Simulink® buses.

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Inherited Signal Dimensions for Legacy Function Arguments

Inherited Signal Dimensions for Legacy Function Arguments

Use the Legacy Code Tool to integrate legacy C functions whose arguments have inherited dimensions.

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C++ Object Methods as Legacy Functions

C++ Object Methods as Legacy Functions

Use the Legacy Code Tool to integrate legacy C++ object methods.

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Persistent Memory Within Legacy Functions

Persistent Memory Within Legacy Functions

Use the Legacy Code Tool to integrate legacy C functions with instance specific persistent memory.

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Multi-Dimensional Signals in Legacy Functions

Multi-Dimensional Signals in Legacy Functions

Use the Legacy Code Tool to integrate legacy C functions with Multi-Dimensional Signals.

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Complex Signals in Legacy Function

Complex Signals in Legacy Function

Use the Legacy Code Tool to integrate legacy C functions using complex signals.

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Specified or Inherited Sample Time with Legacy Functions

Specified or Inherited Sample Time with Legacy Functions

Use the Legacy Code Tool to integrate legacy C functions with the sample time specified, inherited and parameterized.

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