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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_code Integrate existing C/C++ code by using the 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 by Using the MATLAB Function Block
Use MATLAB Function blocks to call external C code and control enumeration and bus typedefs.

Featured Examples

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.

Open Model

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.

Open Model

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.

Open Model

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.

Open Model

Lookup Tables Implemented in Legacy Functions

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

Open Model

Start and Terminate Actions Within Legacy Functions

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

Open Model

Using Buses with Legacy Functions Having Structure Arguments

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

Open Model

Inherited Signal Dimensions for Legacy Function Arguments

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

Open Model

C++ Object Methods as Legacy Functions

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

Open Model

Persistent Memory Within Legacy Functions

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

Open Model

Multi-Dimensional Signals in Legacy Functions

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

Open Model

Complex Signals in Legacy Function

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

Open Model

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.

Open Model