Simulink.ModelReference.protect
Obscure referenced model contents to hide intellectual property
Syntax
Description
creates a protected model from the model specified by harnessHandle
= Simulink.ModelReference.protect(mdl
)mdl
.
The protected model has the same name as the source model and an
.slxp
file extension. By default, the software places the
protected model in the current working folder.
When model protection creates and opens a harness model, the handle of the harness model
is returned by harnessHandle
. By default,
harnessHandle
returns 0
.
specifies options using one or more name-value arguments in addition to the
input arguments in previous syntaxes. For example, to collect the dependencies
in a project, set harnessHandle
= Simulink.ModelReference.protect(mdl
,Name=Value
)Project
to
true
.
[
returns the names of base workspace variables used by the protected model in
harnessHandle
,neededVars
] = Simulink.ModelReference.protect(___)neededVars
. Specify an input argument combination from
the previous syntaxes.
Examples
Protect Referenced Model
Open an example that contains the referenced model named
sldemo_mdlref_counter_bus
.
mdl = "sldemo_mdlref_counter_bus";
openExample(mdl)
Protect the referenced model.
Simulink.ModelReference.protect(mdl);
The Simulink.ModelReference.protect
function creates
a protected model named sldemo_mdlref_counter_bus.slxp
in
the current working folder.
The function returns 0
for the harness handle because
the model protection process does not create a harness model by
default.
When a Model block does not specify a file extension, the block refers to the protected model instead of the original model. By default, the model that references the protected model can run in normal, accelerator, or rapid accelerator mode.
Generate Code for Protected Model
When you generate code for a protected model, a model that references the protected model can support code generation.
For example, generate C and C++ code when you protect a referenced model
named sldemo_mdlref_counter_bus
.
Open an example that contains the referenced model.
mdl = "sldemo_mdlref_counter_bus";
openExample(mdl)
Protect the referenced model, generate C and C++ code for the protected model, and do not obfuscate the generated code. Generating readable code for the protected model helps recipients integrate the protected model code with their own code.
Simulink.ModelReference.protect(mdl,Mode="CodeGeneration",... ObfuscateCode=false);
The function creates a protected model named
sldemo_mdlref_counter_bus.slxp
. A model that
references the protected model can support C and C++ code generation.
For another example, generate HDL code when you protect a referenced model
named hdlcoder_referenced_model_gain
.
Open an example that contains the referenced model.
mdl = "hdlcoder_referenced_model_gain";
openExample(mdl)
Protect the referenced model and generate HDL code for the protected model.
Simulink.ModelReference.protect(mdl,Mode="HDLCodeGeneration");
The function creates a protected model named
hdlcoder_referenced_model_gain.slxp
. A model that
references the protected model can support HDL code generation.
To create a protected model that supports C, C++, and HDL code generation,
set Mode
to "CodeGeneration"
and
hdl
to true
.
Share Protected Model with Third Parties
When you plan to share a protected model with third parties, package the protected model, a harness model, and the supporting files in a project.
Open an example that contains the referenced model named
sldemo_mdlref_counter_bus
.
mdl = "sldemo_mdlref_counter_bus";
openExample(mdl)
Protect the referenced model and collect the protected model dependencies in a project. Optionally, generate a report that describes the supported functionality.
Simulink.ModelReference.protect(mdl,Project=true,Report=true);
The function creates a protected model named
sldemo_mdlref_counter_bus.slxp
and a project archive
named sldemo_mdlref_counter_bus_protected.mlproj
.
The project archive contains:
The protected model named
sldemo_mdlref_counter_bus.slxp
A harness model named
sldemo_mdlref_counter_bus_harness0.slx
A data dictionary named
sldemo_mdlref_bus.sldd
A Simulink® cache file named
sldemo_mdlref_counter_bus_harness0.slxc
Before sharing the project, check whether the project contains the necessary supporting files. If supporting files are missing, simulating or generating code for the related harness model can help identify the missing files. Add the missing dependencies to the project and update the harness model as needed.
To share the protected model with a third party, share the project archive. For more information, see Archive Projects.
For information about how recipients can use the protected model and project archive, see Reference Protected Models from Third Parties.
Tag Protected Model with Additional Information
The protected model automatically stores some information, such as the name and version of the design file and the platform used to create the protected model. When a continuous integration system creates the protected model, consider including provenance information such as the job number, Git™ commit, or continuous integration system tag associated with creating the protected model.
For example, suppose you use Jenkins® for continuous integration. Create a tag that contains
provenance information for the protected model. For example, construct the
tag using the GIT_COMMIT
and BUILD_ID
variables from the Jenkins environment.
JenkinsInfo = [getenv("GIT_COMMIT")+"@"+getenv("BUILD_ID")];
Protect the model and include the tag with the file provenance
information. Optionally, generate a report that includes the model version
used to generate the protected model. In this example, the model to protect
is specified by mdl
.
Simulink.ModelReference.protect(mdl,Tag=JenkinsInfo,Report=true);
The function creates a protected model. To get the information stored in
the tag, open the protected model report or use the slxpinfo
function.
Determine Variables Required by Protected Model
To simulate a model that references a protected model, you might need
to define variables in the base workspace or data dictionaries. For example, the
sldemo_mdlref_counter_bus
model needs the variables that specify the
buses at the root input and output ports of the model. When you ship a protected model,
you must include definitions of the required variables or the model is unusable.
Tip
To automatically package required variable definitions with the protected model in
a project, set Project
to true
.
Open an example that contains the referenced model named
sldemo_mdlref_counter_bus
.
mdl = "sldemo_mdlref_counter_bus";
openExample(mdl)
Generate the protected model, create a harness model for the protected model, and determine the variables required by the protected model.
[harnessHandle,neededVars] = Simulink.ModelReference.protect(mdl,...
Harness=true)
The harness model handle is given by harnessHandle
.
The variables you must send the recipient are given by
neededVars
. The value of
neededVars
is a cell array that contains the names of
the variables required by the protected model. However, the cell array might
also contain the names of variables that the model does not need.
Before you share the protected model, edit neededVars
to delete
the names of any variables that the model does not need. Save the required variables in
a data dictionary.
Input Arguments
mdl
— Model to protect
character vector | string scalar
Model to protect, specified as a character vector or string scalar. Specify the name of the model that you want to protect or the path of the Model block that references the model that you want to protect.
Data Types: char
| string
Name-Value Arguments
Specify optional pairs of arguments as
Name1=Value1,...,NameN=ValueN
, where Name
is
the argument name and Value
is the corresponding value.
Name-value arguments must appear after other arguments, but the order of the
pairs does not matter.
Example: Simulink.ModelReference.protect(mdl,Mode="CodeGeneration",OutputFormat="Binaries",ObfuscateCode=true)
specifies that obfuscated code be generated for the protected model and that only
binary files and headers in the generated code be visible to users of the protected
model.
Project
— Option to collect dependencies in project
false
(default) | true
Since R2020b
Option to collect dependencies in project, specified as false
or
true
.
Specify whether to package supporting files, including a harness model, with the protected model in a project archive. The type and number of supporting files depends on the model being protected. Examples of supporting files are a MAT file with base workspace definitions and a data dictionary pruned to relevant definitions. The supporting files are not protected.
false
— Create only the protected model. If the protected model has dependencies, you must share them separately. Similarly, if you create a harness model for the protected model, you must share the harness model separately.true
— Create a project archive (.mlproj
) that contains the protected model, its dependencies, and its harness model. The supporting files are not protected. The project archive is a single file that allows for easy sharing. To create the interactive project, open the project archive.
Example: Simulink.ModelReference.protect(mdl,Project=true)
Tips
Before sharing the project, check whether the project contains the required supporting files. If supporting files are missing, simulating or generating code for the related harness model can help identify them. Add the missing dependencies to the project and update the harness model as needed. For more information, see Manage Project Files.
Dependencies
To set Project
to true
, set
Mode
to a value that supports simulation.
For example, set Mode
to
"Simulation"
(default).
Data Types: logical
ProjectName
— Custom project name
character vector | string scalar
Since R2020b
Custom project name, specified as a character vector or string scalar.
Specify the name of the project archive that contains the generated files. The project inside the archive uses the same name.
If you do not specify a custom name, the default name for the project is the protected
model name followed by _protected
.
Example: Simulink.ModelReference.protect(mdl,Project=true,ProjectName="MyProject")
Dependencies
To enable this argument, set Project
to
true
.
Data Types: char
| string
Harness
— Option to create harness model
false
(default) | true
Option to create harness model, specified as a Boolean value.
Specify whether to create a harness model for the protected model. The harness model provides an isolated environment for the protected model, which is referenced by a Model block.
false
— Do not create a harness model for the protected model.true
— Create a harness model for the protected model.
When you create a harness model for a protected model that relies on base workspace definitions, the software creates a MAT file that contains the base workspace definitions.
The harness model must have access to supporting files, such as a MAT file with base workspace definitions or a data dictionary.
Example: Simulink.ModelReference.protect(mdl,Harness=true)
Dependencies
Data Types: logical
Path
— Folder for protected model
current working folder (default) | character vector | string scalar
Folder for protected model, specified as a character vector or string scalar.
Example: Simulink.ModelReference.protect(mdl,Path="C:\Work")
Dependencies
The model being protected must be on the MATLAB® path.
Data Types: char
| string
Tag
— Custom text string for additional information
character vector | string scalar
Since R2024b
Custom text string for additional information, specified as a character vector or string scalar.
Being able to trace a protected model to the corresponding version of the design file can be useful for debugging. To store file provenance information in a protected model, specify a custom text tag with information such as the job number, Git commit, or continuous integration system tag associated with creating the protected model.
The tag length must not exceed 256 characters.
To generate a tag based on environment variables, use the getenv
function.
Example: Simulink.ModelReference.protect(mdl,Tag=
myTag
)
Data Types: char
| string
Verbose
— Verbose output of build process information
false
or 0
(default) | true
or 1
Since R2024b
Verbose output of build process information, specified as a numeric or
logical 1
(true
) or
0
(false
).
By default, the model protection process displays limited build
process information. To display verbose build process information during
model protection, set Verbose
to
true
.
To control the display of build process information, the model protection process temporarily overrides the values of the Verbose accelerator builds and Verbose build configuration parameters.
Example: Simulink.ModelReference.protect(mdl,Verbose=true)
Data Types: logical
Report
— Option to generate report
false
(default) | true
Option to generate report, specified as a Boolean value.
To view the report, perform one of these actions:
Simulink Editor: On the Model block, right-click the protected-model badge icon . Then, select Display Report.
MATLAB Command Window: Use the
Simulink.ProtectedModel.open
function. For example, to display the report for a protected model namedsldemo_mdlref_counter
, enter this command.Simulink.ProtectedModel.open("sldemo_mdlref_counter","report");
The report is generated in HTML format. It includes information on the environment, functionality, and interface for the protected model.
Example: Simulink.ModelReference.protect(mdl,Report=true)
Dependencies
To set Report
to true
, set
Mode
to a value that supports simulation.
For example, set Mode
to
"Simulation"
(default).
Data Types: logical
Webview
— Option to include read-only web view
false
(default) | true
Option to include read-only web view, specified as a Boolean value.
Specify whether to share an interactive rendition of a Simulink model that the recipient can view in a web browser. This read-only web view of the model includes the contents and block parameters of the model.
false
— Do not share a web view of the model that you protect.true
— Share a web view of the model that you protect.
To open a web view of a protected model, perform one of these actions:
Current Folder Browser: Double-click the protected model file (
.slxp
).MATLAB Command Window: Use the
Simulink.ProtectedModel.open
function. For example, to display the web view for a protected model namedsldemo_mdlref_counter
, enter this command.Simulink.ProtectedModel.open("sldemo_mdlref_counter","webview");
Example: Simulink.ModelReference.protect(mdl,Webview=true)
Dependencies
Creating a read-only web view of the model requires a Simulink Report Generator™ license.
Data Types: logical
Mode
— Model protection mode
"Simulation"
(default) | "CodeGeneration"
| "HDLCodeGeneration"
| "ViewOnly"
Model protection mode, specified as one of these values:
"Simulation"
(since R2023b) — A model that references the protected model can run in normal, accelerator, or rapid accelerator mode.Before R2023b: Use
"Accelerator"
instead of"Simulation"
."CodeGeneration"
— A model that references the protected model can run in normal, accelerator, rapid accelerator, or external mode and can support C and C++ code generation. This option requires a Simulink Coder™ license."HDLCodeGeneration"
— A model that references the protected model can run in normal, accelerator, or rapid accelerator mode and can support HDL code generation. This option requires an HDL Coder™ license."ViewOnly"
— The protected model supports only a read-only web view. The protected model does not support simulation or code generation. This option requires a Simulink Report Generator license.
For information about simulation modes in model hierarchies, see Choose Simulation Modes for Model Hierarchies.
Example: Simulink.ModelReference.protect(mdl,Mode="Simulation")
CodeInterface
— Interface for generated code
"Model reference"
(default) | "Top model"
Interface for generated code, specified as one of these values:
"Model reference"
— A Model block that references the protected model can support C and C++ code generation and simulation in accelerator, software-in-the-loop (SIL), or processor-in-the-loop (PIL) mode. For SIL and PIL simulations, the software deploys the generated code as part of a larger application that uses the referenced model. The generated artifacts match those generated by theslbuild
function with the"ModelReferenceCoderTarget"
build specification."Top model"
— A Model block that references the protected model can support simulation in accelerator, software-in-the-loop (SIL), or processor-in-the-loop (PIL) mode. For SIL and PIL simulations, the software deploys the generated code as a standalone application. The generated artifacts match those generated by theslbuild
function with the"StandaloneCoderTarget"
build specification.
SIL and PIL simulations can verify the protected model code.
Example: Simulink.ModelReference.protect(mdl,CodeInterface="Top
model")
Dependencies
The System target file configuration
parameter must be set to an ERT-based system target file, for example,
ert.tlc
. This option requires an Embedded Coder® license.
hdl
— Option to generate HDL code
false
(default) | true
Option to generate HDL code, specified as a Boolean value.
For the protected model to support simulation, C and C++ code generation, and HDL code
generation, set Mode
to
"CodeGeneration"
and hdl
to
true
.
Example: Simulink.ModelReference.protect(mdl,Mode="CodeGeneration",hdl=true)
Tips
For the protected model to support simulation and HDL code generation, but not C or C++
code generation, set Mode
to
"HDLCodeGeneration"
. You do not have to set
hdl
to true
.
Dependencies
To generate HDL code, you must have an HDL Coder license.
This argument affects the output only when you set
Mode
to"CodeGeneration"
.
Data Types: logical
TunableParameters
— Tunable parameters for simulation
"None"
or {}
(default) | "All"
| string array | cell array of character vectors
Since R2022a
Tunable parameters for simulation, specified as "None"
,
{}
, "All"
, a string array, or
a cell array of character vectors.
Specify the parameters from external data sources that you want the recipient to be able to tune during simulation.
The model protection process honors the tunability of parameters in the model workspace. Model arguments are inherently tunable. You do not need to specify the tunability of model arguments.
When you protect a model that references one or more protected models,
specify the tunable parameters of each referenced protected model as
also being tunable for the parent model. To get the list of tunable
parameters for a protected model, use the Simulink.ProtectedModel.getTunableParameters
function.
For more information about tunable parameters for simulation, see Tune and Experiment with Block Parameter Values.
Example: Simulink.ModelReference.protect(mdl,TunableParameters=["param1","param2"])
Data Types: char
| string
| cell
Callbacks
— Option to specify callbacks for protected model
{}
(default) | cell array
Option to specify callbacks for protected model, specified as a cell array of
Simulink.ProtectedModel.Callback
objects.
Example: Simulink.ModelReference.protect(mdl,Callbacks={pmcallback_sim,pmcallback_cg})
Data Types: cell
ObfuscateCode
— Option to obfuscate generated code
true
(default) | false
Option to obfuscate generated code, specified as a Boolean value.
Example: Simulink.ModelReference.protect(mdl,Mode="CodeGeneration",ObfuscateCode=true)
Dependencies
This option is applied only when you set Mode
to
"CodeGeneration"
. Obfuscation is not
supported for HDL code generation.
Data Types: logical
OutputFormat
— Protected code visibility
"CompiledBinaries"
(default) | "MinimalCode"
| "AllReferencedHeaders"
Protected code visibility, specified as one of these values:
"CompiledBinaries"
— Include only compiled binaries for the generated code. The binary files and headers are visible."MinimalCode"
— Include only the minimal header files required to build the code with the chosen build settings. The code in the build folder is visible. Recipients can inspect the code in the protected model report and recompile it for their purposes."AllReferencedHeaders"
— Include header files found on the include path. The code in the build folder is visible. The headers referenced by the code are also visible.
This argument determines what part of the code generated for a protected model is visible to users.
Example: Simulink.ModelReference.protect(mdl,Mode="CodeGeneration",OutputFormat="AllReferencedHeaders")
Dependencies
This argument affects the output only when you set Mode
to
"Simulation"
,
"Accelerator"
, or
"CodeGeneration"
.
Encrypt
— Option to encrypt protected model
false
(default) | true
Option to encrypt protected model, specified as a Boolean value.
This option applies when you have specified a password during protection, or by using these functions:
Password for read-only view of model:
Simulink.ModelReference.ProtectedModel.setPasswordForView
Password for simulation:
Simulink.ModelReference.ProtectedModel.setPasswordForSimulation
Password for code generation:
Simulink.ModelReference.ProtectedModel.setPasswordForCodeGeneration
Password for HDL code generation:
Simulink.ModelReference.ProtectedModel.setPasswordForHDLCodeGeneration
To apply the specified passwords to the protected model, set
Encrypt
to true
.
Example: Simulink.ModelReference.protect(mdl,Encrypt=true)
Data Types: logical
Sign
— Option to sign protected model with digital certificate
character vector | string scalar
Option to sign protected model with digital certificate, specified as a character vector
or string scalar that specifies the digital certificate. If the certificate file is
password protected, use the Simulink.ModelReference.ProtectedModel.setPasswordForCertificate
function to provide the password before you use the certificate.
Example: Simulink.ModelReference.protect(mdl,Sign="
certificate_file
.pfx")
Data Types: char
| string
Modifiable
— Option to create modifiable protected model
false
(default) | true
Option to create modifiable protected model, specified as a Boolean value.
To use this option:
Add a password for modification by using the
Simulink.ModelReference.ProtectedModel.setPasswordForModify
function. If a password has not been added at the time that you create the modifiable protected model, you are prompted to create one.Modify the options of your protected model by first providing the modification password using the
Simulink.ModelReference.ProtectedModel.setPasswordForModify
function. Then, use theSimulink.ModelReference.modifyProtectedModel
function to make your option changes.
Example: Simulink.ModelReference.protect(mdl,Modifiable=true)
Data Types: logical
CustomPostProcessingHook
— Option to add postprocessing function for protected model files
function handle
Option to add a postprocessing function for protected model files, specified as a function handle.
The function accepts a Simulink.ModelReference.ProtectedModel.HookInfo
object as
an input variable. This object provides information on the source code
files and other files generated during protected model creation. The
object also provides information on exported symbols that you must not
modify. Prior to packaging the protected model, the software calls the
postprocessing function.
For a protected model with a top model interface, the Simulink.ModelReference.ProtectedModel.HookInfo
object cannot provide
information on exported symbols.
Example: Simulink.ModelReference.protect(mdl,Mode="CodeGeneration",CustomPostProcessingHook=@(protectedMdlInf)myHook(protectedMdlInf))
Dependencies
To enable this argument, set Mode
to
"CodeGeneration"
.
Output Arguments
harnessHandle
— Handle of harness model
double
neededVars
— Names of base workspace variables
cell array
Names of base workspace variables that the protected model uses, returned as a cell array.
The cell array includes:
Tunable parameters
Parameters that are used by the model interface
Parameters that specify part of a data type, such as a bus object, enumerated type, or value type
Parameters that are used by data store memory
The cell array can also include variables that the protected model does not use.
Alternatives
Version History
Introduced in R2012bR2024b: Specify custom text tag with additional information
The new Tag
argument lets you specify custom text with
information that is relevant to the protected model.
Being able to trace a protected model to the corresponding version of the design file can be useful for debugging. To store file provenance information in a protected model, specify a custom text tag with information such as the job number, Git commit, or continuous integration system tag associated with creating the protected model.
R2024b: Model protection now provides limited build process information by default
To focus on the high-level steps in the model protection process, the
Simulink.ModelReference.protect
function now displays limited build process
information by default. The model protection process temporarily overrides the
values of the Verbose accelerator builds and
Verbose build configuration
parameters.
To display verbose build process information during model protection, set
Verbose
to true
.
R2023b: External mode support with Mode
set to 'CodeGeneration'
When you set Mode
to 'CodeGeneration'
, the
protected model supports external mode simulation.
R2023b: Default Mode
value is 'Simulation'
The name of the default Mode
value has changed from
'Accelerator'
to 'Simulation'
. The behavior of the
default value has not changed.
R2023b: 'Accelerator'
is not recommended
The Mode
value 'Accelerator'
is not recommended.
Use 'Simulation'
instead.
'Simulation'
and'Accelerator'
behave the same.'Simulation'
aligns better with the simulation option in the Create Protected Model dialog box.'Accelerator'
refers to only one of the supported simulation modes. A model that references a protected model that supports simulation can run in normal, accelerator, or rapid accelerator mode.
There are no plans to remove 'Accelerator'
.
R2023a: Mode
will not support normal mode restrictions
In a future release, when you set Mode
to
'Normal'
, the function will create a protected model that supports
simulation when the parent model simulates in normal, accelerator, or rapid accelerator
mode. This change will standardize simulation support for new protected models. Protected
models created before this change will be unaffected.
Currently, when you set Mode
to 'Normal'
, the
function creates a protected model that supports simulation only when the parent model
simulates in normal mode.
R2023a: Default Mode
value is 'Accelerator'
The default value of the Mode
argument is
'Accelerator'
. A model that references the protected model can run in
normal, accelerator, or rapid accelerator mode.
With this change, the Create Protected Model dialog box and
Simulink.ModelReference.protect
function use the same default model
protection mode.
Previously, the default value of the Mode
argument was
'Normal'
. The 'Normal'
model protection mode
restricts the use of the protected model such that the protected model supports simulation
only when the parent model simulates in normal mode.
R2022a: Tunable parameters for simulation are specified by the TunableParameters
argument
You must specify the parameters of the protected model that you want to be tunable
during simulation by using the TunableParameters
name-value argument.
By default, no parameters are tunable during simulation.
To get the list of tunable parameters for a protected model, use the Simulink.ProtectedModel.getTunableParameters
function.
Previously, a parameter was tunable when its code generation storage class was set to a
value other than Auto
. By default, the storage class for an individual
data element is Auto
.
R2020b: Automatically package protected models with their dependencies
When you create a protected model, you can automatically package it with its dependencies and a harness model in a project archive. When the recipient extracts the contents of the project archive and opens the harness model, they should be able to simulate the protected model without needing to define missing variables or objects. Before sharing the project archive, check whether the project contains the required supporting files, and update the harness model as needed.
Use Project
to save the protected model, its dependencies, and its
harness model in a project archive (.mlproj
). The project archive
provides a way to share a project in a single file.
Use ProjectName
to specify a custom project name.
For more information, see Package and Share Protected Models
See Also
Tools
Functions
Simulink.ModelReference.modifyProtectedModel
|Simulink.ModelReference.ProtectedModel.setPasswordForModify
|Simulink.ModelReference.ProtectedModel.setPasswordForCodeGeneration
|Simulink.ModelReference.ProtectedModel.setPasswordForHDLCodeGeneration
|Simulink.ModelReference.ProtectedModel.setPasswordForSimulation
|Simulink.ModelReference.ProtectedModel.setPasswordForView
|Simulink.ModelReference.ProtectedModel.clearPasswords
|Simulink.ModelReference.ProtectedModel.clearPasswordsForModel
|Simulink.ProtectedModel.getTunableParameters
Topics
- Protect Models to Conceal Contents
- Explore Protected Model Capabilities
- Test Protected Models
- Package and Share Protected Models
- Specify Custom Obfuscators for Protected Models
- Configure and Run SIL Simulation (Embedded Coder)
- Code Interfaces for SIL and PIL (Embedded Coder)
- Define Callbacks for Protected Models
- Reference Protected Models from Third Parties
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