Parameter Reference :: Configuration Parameters for Simulink Models (Real-Time Workshop®)

Parameter Reference

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Recommended Settings Summary Parameter Command-Line Information Summary

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Parameter Command-Line Information Summary

Recommended Settings Summary

The following table summarizes the impact of each configuration parameter on debugging, traceability, efficiency, and safety considerations, and indicates the factory default configuration settings for the GRT and ERT targets, unless otherwise specified.

For parameters that are available only when an ERT target is specified, see the Recommended Settings Summary in the Real-Time Workshop Embedded Coder documentation.

For additional details, click the links in the Configuration Parameter column.

Mapping Application Requirements to the Solver Pane

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Start Time	No impact	No impact	No impact	0.0	0.0 seconds
Stop time	No impact	No impact	No impact	Any positive value	10.0 seconds
Type	`Fixed-step`	`Fixed-step`	`Fixed-step`	`Fixed-step`	`Variable-step` (you must change to `Fixed-step` for code generation)
Solver	No impact	No impact	No impact	`Discrete (no continuous states)`	`ode3 (Bogacki-Shampine)`
Periodic sample time constraint	No impact	No impact	No impact	`Specified` or `Ensure sample time independent`	`Unconstrained`
Sample time properties	No impact	No impact	No impact	Period, offset, and priority of each sample time in the model; faster sample times must have higher priority than slower sample times	`''`
Tasking mode for periodic sample times	No impact	No impact	No impact	No impact	Auto
Automatically handle rate transition for data transfer	No impact	No impact (for simulation and during development) Off (for production code generation)	No impact	Off	Off

Mapping Application Requirements to the Data Import/Export Pane

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Input	No impact	No impact	No impact	No impact (GRT) Off (ERT)	Off
Initial State	No impact	No impact	No impact	No impact (GRT) Off (ERT)	Off
Time	No impact	No impact	No impact	No impact (GRT) Off (ERT)	On
States	No impact	No impact	No impact	No impact (GRT) Off (ERT)	Off
Output	No impact	No impact	No impact	No impact (GRT) Off (ERT)	On
Final states	No impact	No impact	No impact	No impact (GRT) Off (ERT)	Off
Signal logging	No impact	No impact	No impact	No impact (GRT) Off (ERT)	On
Inspect signal logs when simulation is paused/stopped	No impact	No impact	No impact	No impact (GRT) Off (ERT)	Off
Limit data points to last	No impact	No impact	No impact	No impact (GRT) Off (ERT)	On
Decimation	No impact	No impact	No impact	No impact (GRT) Off (ERT)	1
Format	No impact	No impact	No impact	No impact (GRT) Off (ERT)	`Array`
Output options	No impact	No impact	No impact	No impact (GRT) Off (ERT)	`Refine output`
Refine factor	No impact	No impact	No impact	No impact (GRT) Off (ERT)	1
Output times	No impact	No impact	No impact	No impact (GRT) Off (ERT)	`'[]'`

Mapping Application Requirements to the Optimization Pane

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Block reduction	Off (GRT) No impact (ERT)	Off	On	Off	On
Implement logic signals as Boolean data (vs. double)	No impact	No impact	On	On	On
Inline parameters	Off (GRT) On (ERT)	On	On	No impact	Off
Conditional input branch execution	No impact	On	On	Off	On
Signal storage reuse	Off	Off	On	No impact	On
Application lifespan (days)	No impact	No impact	Finite value	`inf`	`inf`
Enable local block outputs	Off	No impact	On	No impact	On
Ignore integer downcasts in folded expressions	Off	No impact	No impact	Off	Off
Eliminate superfluous local variables (Expression folding)	Off	No impact (GRT) Off (ERT)	On	No impact	On
Minimize data copies between local and global variables	Off	Off	On	On	Off
Loop unrolling threshold	No impact	No impact	>0	>1	5
Use memcpy for vector assignment	No impact	No impact	On	No impact	On
Memcpy threshold (bytes)	No impact	No impact	Accept default or determine target-specific optimal value	No impact	64
Use memset to initialize floats and doubles to 0.0	No impact	No impact	On	No impact	On
Reuse block outputs	Off	Off	On	No impact	On
Inline invariant signals	Off	Off	On	No impact	Off
Remove code from floating-point to integer conversions that wraps out-of-range values	Off	Off	On	Off (GRT) On (ERT)	Off
Remove code from floating-point to integer conversions with saturation that maps NaN to zero	Off	Off	On	Off (GRT) On (ERT)	On
Use bitsets for storing state configuration	Off	Off	Off	No impact	Off
Use bitsets for storing Boolean data	Off	Off	Off	No impact	Off

Mapping Application Requirements to the Diagnostics: Solver Pane

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Algebraic loop	`error`	No impact	No impact	`error`	`warning`
Minimize algebraic loop	No impact	No impact	No impact	`error`	`warning`
Block priority violation	No impact	No impact	No impact	`error`	`warning`
Consecutive zero-crossings violation	No impact	No impact	No impact	`warning` or `error`	`error`
Unspecified inheritability of sample time	No impact	No impact	No impact	`error`	`warning`
Solver data inconsistency	`warning`	No impact	`none`	No impact	`warning`
Automatic solver parameter selection	No impact	No impact	No impact	`error`	`warning`

Mapping Application Requirements to the Diagnostics: Sample Time Pane

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Source block specifies -1 sample time	No impact	No impact	No impact	`error`	`none`
Discrete used as continuous	No impact	No impact	No impact	`error`	`warning`
Multitask rate transition	No impact	No impact	No impact	`error`	`error`
Single task rate transition	No impact	No impact	No impact	`none` or `error`	`none`
Multitask conditionally executed subsystem	No impact	No impact	No impact	`error`	`error`
Tasks with equal priority	No impact	No impact	No impact	`none` or `error`	`warning`
Enforce sample times specified by Signal Specification blocks	No impact	No impact	No impact	`error`	`warning`

Mapping Application Requirements to the Diagnostics: Data Validity Pane

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Signal resolution	No impact	No impact	No impact	`Explicit only`	`Explicit only`
Division by singular matrix	No impact	No impact	No impact	`error`	`none`
Underspecified data types	No impact	No impact	No impact	`error`	`none`
Simulation range checking	`warning` or `error`	`warning` or `error`	`none`	`error`	`none`
Detect overflow	No impact	No impact	No impact	`error`	`warning`
Inf or NaN block output	No impact	No impact	No impact	`error`	`none`
"rt" prefix for identifiers	No impact	No impact	No impact	`error`	`error`
Detect downcast	No impact	No impact	No impact	`error`	`error`
Detect overflow	No impact	No impact	No impact	`error`	`error`
Detect underflow	No impact	No impact	No impact	`error`	`none`
Detect precision loss	No impact	No impact	No impact	`error`	`error`
Detect loss of tunability	No impact	No impact	No impact	`error`	`none`
Detect read before write	No impact	No impact	No impact	`error`	`Enable all as warnings`
Detect write after read	No impact	No impact	No impact	`error`	`Enable all as warning`
Detect write after write	No impact	No impact	No impact	`error`	`Enable all as errors`
Multitask data store	No impact	No impact	No impact	`error`	`warning`
Duplicate data store names	`warning`	No impact	`none`	No impact	`none`
Check undefined subsystem initial output	No impact	No impact	No impact	On	On
Check preactivation output of execution context	No impact	No impact	No impact	On	Off
Check runtime output of execution context	No impact	No impact	No impact	On	Off
Model Verification block enabling	No impact	No impact	No impact	No impact (GRT) `Disable all` (ERT)	`Use local settings`

Mapping Application Requirements to the Diagnostics: Type Conversion Pane

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Unnecessary type conversions	No impact	No impact	No impact	`warning`	`none`
Vector/matrix block input conversion	No impact	No impact	No impact	`error`	`none`
32-bit integer to single precision float conversion	No impact	No impact	No impact	`warning`	`warning`

Mapping Application Requirements to the Diagnostics: Connectivity Pane

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Signal label mismatch	No impact	No impact	No impact	`error`	`none`
Unconnected block input ports	No impact	No impact	No impact	`error`	`warning`
Unconnected block output ports	No impact	No impact	No impact	`error`	`warning`
Unconnected line	No impact	No impact	No impact	`error`	`none`
Unspecified bus object at root Outport block	No impact	No impact	No impact	`error`	`warning`
Element name mismatch	No impact	No impact	No impact	`error`	`warning`
Mux blocks used to create bus signals	No impact	No impact	No impact	`error`	`warning`
Bus signal treated as vector	No impact	No impact	No impact	`error`	`warning`
Invalid function-call connection	No impact	No impact	No impact	`error`	`error`
Context-dependent inputs	No impact	No impact	No impact	`Enable all`	`Use local settings`

Mapping Application Requirements to the Diagnostics: Compatibility Pane

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
S-function upgrades needed	No impact	No impact	No impact	`error`	`none`

Mapping Application Requirements to the Diagnostics: Model Referencing Pane

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Model block version mismatch	No impact	No impact	No impact	`none`	`none`
Port and parameter mismatch	No impact	No impact	No impact	`error`	`none`
Model configuration mismatch	No impact	No impact	No impact	`warning`	`none`
Invalid root Inport/Outport block connection	No impact	No impact	No impact	`error`	`none`
Unsupported data logging	No impact	No impact	No impact	`error`	`warning`

Mapping Application Requirements to the Diagnostics: Saving Pane

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Block diagram contains disabled library links	No impact	No impact	No impact	No impact	`warning`
Block diagram contains parameterized library links	No impact	No impact	No impact	No impact	`none`

Mapping Application Requirements to the Hardware Implementation Pane

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Device vendor	No impact	No impact	No impact	No impact	No impact
Device type	No impact	No impact	No impact	No impact	No impact
Number of bits	No impact	No impact	Target specific	No impact (GRT) Match operation of target compiler and hardware (ERT)	8, 16, 32, 32, 32
Byte ordering	No impact	No impact	No impact	No impact	Unspecified
Signed integer division rounds to	No impact (GRT) `Undefined` (ERT)	No impact (GRT) `Zero` or `Floor` (ERT)	No impact (GRT) `Zero` (ERT)	No impact (GRT) `Floor` (ERT)	`Undefined`
Shift right on a signed integer as arithmetic shift	No impact	No impact	On	No impact	On
Emulation hardware (code generation only)	No impact	No impact	No impact	No impact	On

Mapping Application Requirements to the Model Referencing Pane

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Rebuild options	No impact	No impact	No impact	`Never` or `If any changes detected`	`If any changes detected`
Never rebuild targets diagnostic	No impact	No impact	No impact	`error` if targets require rebuild	`error`
Total number of instances allowed per top model	No impact	No impact	No impact	No impact	`Multiple`
Model dependencies	No impact	No impact	No impact	No impact	`''`
Pass scalar root inputs by value for Real-Time Workshop	No impact	No impact	No impact	Off	Off
Minimize algebraic loop occurrences	No impact	No impact	No impact	Off	Off

Mapping Application Requirements to the Simulation Target: General Pane

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Enable debugging/animation	On	No impact	Off	On	On
Enable overflow detection (with debugging)	On	No impact	Off	On	On
Ensure memory integrity	On	On	Off	On	On
Echo expressions without semicolons	On	No impact	Off	No impact	On
Use BLAS library for faster simulation	No impact	No impact	On	No impact	On
Ensure responsiveness	On	On	Off	On	On
Simulation target build mode	No impact	No impact	No impact	No impact	`Incremental build`

Mapping Application Requirements to the Simulation Target: Symbols Pane

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Reserved names	No impact	No impact	No impact	No impact	`{}`

Mapping Application Requirements to the Simulation Target: Custom Code Pane

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Source file	No impact	No impact	No impact	No impact	`''`
Header file	No impact	No impact	No impact	No impact	`''`
Initialize function	No impact	No impact	No impact	No impact	`''`
Terminate function	No impact	No impact	No impact	No impact	`''`
Include directories	No impact	No impact	No impact	No impact	`''`
Source files	No impact	No impact	No impact	No impact	`''`
Libraries	No impact	No impact	No impact	No impact	`''`

Mapping Application Requirements to the Real-Time Workshop: General Pane

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
System target file	No impact	No impact	No impact	No impact (GRT) ERT based (ERT)	`grt.tlc`
Language	No impact	No impact	No impact	No impact	C
Compiler optimization level	`Optimizations off (faster builds)`	`Optimizations off (faster builds)`	`Optimizations on (faster runs)`	No impact	`Optimizations off (faster builds)`
Custom compiler optimization flags	`Optimizations off (faster builds)`	`Optimizations off (faster builds)`	`Optimizations on (faster runs)`	No impact	`Optimizations off (faster builds)`
TLC options	No impact	No impact	No impact	No impact	`''`
Generate makefile	No impact	No impact	No impact	No impact	On
Make command	No impact	No impact	No impact	`make_rtw`	`make_rtw`
Template makefile	No impact	No impact	No impact	No impact	`grt_default_tmf`
Select objective	`Debugging`	Not applicable for GRT-based targets	Not applicable for GRT-based targets	Not applicable for GRT-based targets	`Unspecified`
Check model before generating code	`On (proceed with warnings)` or `On (stop for warnings)`	`On (proceed with warnings)` or `On (stop for warnings)`	`On (proceed with warnings)` or `On (stop for warnings)`	`On (proceed with warnings)` or `On (stop for warnings)`	`Off`
Generate code only	Off	No impact	No impact	No impact	Off

Mapping Application Requirements to the Real-Time Workshop: Report Pane

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precautions	Factory Default
Create code generation report	On	On	No impact	On	Off
Launch report automatically	On	On	No impact	No impact	Off

Mapping Application Requirements to the Real-Time Workshop: Comments Pane

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Include comments	On	On	No impact	On	On
Simulink block / Stateflow object comments	On	On	No impact	On	On
Show eliminated blocks	On	On	No impact	On	Off
Verbose comments for Simulink Global storage class	On	On	No impact	On	Off

Mapping Application Requirements to the Real-Time Workshop: Symbols Pane

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Maximum identifier length	Any valid value	>30	No impact	>30	31
Use the same reserved names as Simulation Target	No impact	No impact	No impact	No impact	Off
Reserved names	No impact	No impact	No impact	No impact	`{}`

Mapping Application Requirements to the Real-Time Workshop: Custom Code Pane

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Use the same custom code settings as Simulation Target	No impact	No impact	No impact	No impact	Off
Source file	No impact	No impact	No impact	No impact	`''`
Header file	No impact	No impact	No impact	No impact	`''`
Initialize function	No impact	No impact	No impact	No impact	`''`
Terminate function	No impact	No impact	No impact	No impact	`''`
Include directories	No impact	No impact	No impact	No impact	`''`
Source files	No impact	No impact	No impact	No impact	`''`
Libraries	No impact	No impact	No impact	No impact	`''`

Mapping Application Requirements to the Real-Time Workshop: Debug Pane

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Verbose build	On	No impact	No impact	On	On
Retain .rtw file	On	No impact	No impact	No impact	Off
Profile TLC	On	No impact	No impact	No impact	Off
Start TLC debugger when generating code	On	No impact	No impact	No impact	Off
Start TLC coverage when generating code	On	No impact	No impact	No impact	Off
Enable TLC assertion	On	No impact	No impact	On	Off

Mapping Application Requirements to the Real-Time Workshop: Interface Pane

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Target function library	No impact	No impact	Any valid value	No impact	`C89/C90 (ANSI)`
Utility function generation	Shared location (GRT) No impact (ERT)	Shared location (GRT) No impact (ERT)	Shared location	No impact	`Auto`
MAT-file variable name modifier	No impact	No impact	No impact	No impact	`rt_`
Interface	No impact	No impact	No impact	No impact (GRT) `None` (ERT)	`None`
Signals in C API	No impact	No impact	No impact	No impact	On
Parameters in C API	No impact	No impact	No impact	No impact	On
Transport layer	No impact	No impact	No impact	No impact	`tcpip`
MEX-file arguments	No impact	No impact	No impact	No impact	`''`
Static memory allocation	No impact	No impact	No impact	No impact	Off
Static memory buffer size	No impact	No impact	No impact	No impact	1000000

Parameter Command-Line Information Summary

The following table lists Real-Time Workshop parameters that you can use to tune model and target configurations. The table provides brief descriptions, valid values (bold type highlights defaults), and a mapping to Configuration Parameter dialog box equivalents. For descriptions of the panes and options in that dialog box, see Configuration Parameters in the Real-Time Workshop documentation.

Use the get_param and set_param commands to retrieve and set the values of the parameters on the MATLAB command line or programmatically in scripts.

The Configuration Wizard in the Real-Time Workshop Embedded Coder product provides buttons and scripts for customizing code generation. See Using Configuration Wizard Blocks in the Real-Time Workshop Embedded Coder documentation for information on using Configuration Wizard features.

For information about Simulink parameters, see Configuration Parameters Dialog Box in the Simulink documentation. For information on using get_param and set_param to tune the parameters for various model configurations, see Parameter Tuning by Using MATLAB Commands.

For parameters that are specific to the ERT target, or targets based on the ERT target, see Parameter Command-Line Information Summary in the Real-Time Workshop Embedded Coder documentation.

Note Parameters that are specific to Stateflow or Simulink^® Fixed Point™ products are marked with (Stateflow) and (Simulink Fixed Point), respectively.

The default setting for a parameter might vary for different targets.

Command-Line Information: Optimization Pane

Parameter and Values Configuration Parameters Dialog Box Equivalent Description

BooleanDataType off,on Optimization > Implement logic signals as Boolean data (vs. double) Control the output data type of blocks that generate logic signals.

BufferReuse off,on Optimization > Reuse block outputs Reuse local (function) variables for block outputs wherever possible. Selecting this option trades code traceability for code efficiency.

DataBitsets (Stateflow)
off, on Optimization > Use bitsets for storing Boolean data Use bit sets for storing Boolean data.

EfficientFloat2IntCast
off, on Optimization > Remove code from floating-point to integer conversions that wrap out-of-range values Remove wrapping code that handles out-of-range floating-point to integer conversion results.

EfficientMapNaN2IntZero
off, on Optimization > Remove code from floating-point to integer conversions with saturation that maps NaN to zero Remove code that handles floating-point to integer conversion results for NaN values.

EnableMemcpy
off, on Optimization > Use memcpy for vector assignment Optimize code generated for vector assignment by replacing for loops with memcpy function calls.

EnforceIntegerDowncast
off, on

Optimization > Ignore integer downcasts in folded expressions

Remove casts of intermediate variables. When you set this option to on, expressions involving 8-bit and 16-bit arithmetic on microprocessors of a larger bit size are less likely to overflow in code than in simulation.

Note EnforceIntegerDowncast will be removed in a future release.

EnhancedBackFolding
off, on Optimization > Minimize data copies between local and global variables Reuse existing global variables to store temporary results.

ExpressionFolding
off, on Optimization > Eliminate superfluous local variables (Expression folding) > Interface Collapse block computations into single expressions wherever possible. This improves code readability and efficiency.

InitFltsAndDblsToZero
off, on Optimization > Use memset to initialize floats and doubles to 0.0 Optimize initialization of storage for float and double values. Set this option if the representation of floating-point zero used by your compiler and target CPU is identical to the integer bit pattern 0.

InlineInvariantSignals
off, on Optimization > Inline invariant signals Precompute and inline the values of invariant signals in the generated code.

LifeSpan
string Optimization > Application lifespan (days) Optimize the size of counters used to compute absolute and elapsed time, using the specified application life span value.

LocalBlockOutputs
off, on Optimization > Enable local block outputs Declare block outputs in local (function) scope wherever possible to reduce global RAM usage.

MemcpyThreshold
int -64 Optimization > Memcpy threshold (bytes) Specify the minimum array size in bytes for which memcpy function calls should replace for loops in the generated code for vector assignments.

NoFixptDivByZeroProtection (Simulink Fixed Point)
off, on Optimization > Remove code that protects against division arithmetic exceptions Suppress generation of code that guards against division by zero for fixed-point data.

RollThreshold
int -5 Optimization > Loop unrolling threshold Specify the minimum signal width for which a for loop is to be generated.

StateBitsets (Stateflow)
off, on Optimization > Use bitsets for storing state configuration Use bit sets for storing state configuration.

UseIntDivNetSlope (Simulink Fixed Point)
off, on Optimization > Use integer division to handle net slopes that are reciprocals of integers Perform net slope correction using integer division when simplicity and accuracy conditions are met.

Command-Line Information: Real-Time Workshop Pane: General Tab

Parameter and Values Configuration Parameters Dialog Box Equivalent Description

CheckMdlBeforeBuild
string - off, warning, error Real-Time Workshop > General > Check model before generating code Specify whether to run Code Generation Advisor checks before generating code.

GenCodeOnly
string - off, on Real-Time Workshop > General > Generate code only Generate source code, but do not execute the makefile to build an executable.

GenerateMakefile
string - off, on Real-Time Workshop > General > Generate makefile Specify whether to generate a makefile during the build process for a model.

MakeCommand
string - make_rtw Real-Time Workshop > General > Make command Specify the make command and optional arguments to be used to generate an executable for the model.

ObjectivePriorities (GRT)
string - {''}, {'Debugging'} Real-Time Workshop > General > Select objective Specify the code generation objectives to use with the Code Generation Advisor.

ObjectivePriorities (ERT)
string - {''}, {'Efficiency'}, {'Traceability'}, {'Safety precaution'}, {'Debugging'} Real-Time Workshop > General > Set objectives Specify and prioritize the code generation objectives to use with the Code Generation Advisor.

RTWCompilerOptimization
string - Off, On, Custom

Real-Time Workshop > General > Compiler optimization level

Use this parameter to trade off compilation time against run time for your model code without having to supply compiler-specific flags to other levels of the Real-Time Workshop build process.

Off - Turn compiler optimizations off for faster builds

On - Turn compiler optimizations on for faster code execution

Custom - Specify custom compiler optimization flags via the
RTWCustomCompilerOptimizations parameter

RTWCustomCompiler Optimizations
string - '', unquoted string of compiler optimization flags Real-Time Workshop > General > Custom compiler optimization flags If you specified Custom to the RTWCompilerOptimization parameter, use this parameter to specify custom compiler optimization flags, for example, -O2.

SaveLog
off, on Real-Time Workshop > General > Save build log Save build log.

SystemTargetFile
string - grt.tlc Real-Time Workshop > General > System target file Specify a system target file.

TargetLang
string - C, C++, C++ (Encapsulated) (ERT) Real-Time Workshop > General > Language Specify whether to generate C code, C++ compatible code, or C++ encapsulated code. The C++ (Encapsulated) value appears only when you select an ERT system target file for the model. Using C++ (Encapsulated) to generate code requires a Real-Time Workshop Embedded Coder license.

TemplateMakefile
string - grt_default_tmf Real-Time Workshop > General > Template makefile Specify the current template makefile for building a Real-Time Workshop target.

TLCOptions
string - '' Real-Time Workshop > General > TLC options Specify additional TLC command line options.

Command-Line Information: Real-Time Workshop Pane: Report Tab

Parameter and Values	Configuration Parameters Dialog Box Equivalent	Description
`GenerateReport` `string` - `off`, `on`	Real-Time Workshop > Report > Create code generation report	Document the generated C or C++ code in an HTML report.
`LaunchReport` `string` - `off`, `on`	Real-Time Workshop > Report > Launch report automatically	Display the HTML report after code generation completes.

Command-Line Information: Real-Time Workshop Pane: Comments Tab

Parameter and Values	Configuration Parameters Dialog Box Equivalent	Description
`ForceParamTrailComments` `string` - `off`, `on`	Real-Time Workshop > Comments > Verbose comments for SimulinkGlobal storage class	Specify that comments be included in the generated file. To reduce file size, the model parameters data structure is not commented when there are more than 1000 parameters.
`GenerateComments` `string` - `off`, `on`	Real-Time Workshop > Comments > Include comments	Include comments in generated code.
`ShowEliminatedStatement` `string` - `off`, `on`	Real-Time Workshop > Comments > Show eliminated blocks	Show statements for eliminated blocks as comments in the generated code.
`SimulinkBlockComments` `string` - `off`, `on`	Real-Time Workshop > Comments > Simulink block / Stateflow object comments	Insert Simulink block and Stateflow object names as comments above the generated code for each block.

Command-Line Information: Real-Time Workshop Pane: Symbols Tab

Parameter and Values	Configuration Parameters Dialog Box Equivalent	Description
`MaxIdLength` `int -``31`	Real-Time Workshop > Symbols > Maximum identifier length	Specify the maximum number of characters that can be used in generated function, type definition, and variable names.
`ReservedNameArray` `string array` - `{}`	Real-Time Workshop > Symbols > Reserved names	Enter the names of variables or functions in the generated code that match the names of variables or functions specified in custom code to avoid name conflicts.
`UseSimReservedNames` `string` - `off`, `on`	Real-Time Workshop > Symbols > Use the same reserved names as Simulation Target	Specify whether to use the same reserved names as those specified in the Simulation Target > Symbols pane.

Command-Line Information: Real-Time Workshop Pane: Custom Code Tab

Parameter and Values Configuration Parameters Dialog Box Equivalent Description

CustomHeaderCode
string - '' Real-Time Workshop > Custom Code > Header file Specify the code to appear at the top of the generated model.h header file.

CustomInclude
string - ''

Real-Time Workshop > Custom Code > Include directories

Specify a space-separated list of include directories to add to the include path when compiling the generated code.

Note If your list includes any Windows path strings that contain spaces, each instance must be enclosed in double quotes within the argument string, for example,

'C:\Project "C:\Custom Files"'

CustomInitializer
string - '' Real-Time Workshop > Custom Code Specify the code to appear in the generated model initialize function.

CustomLibrary
string - ''

Real-Time Workshop > Custom Code > Initialize function Libraries

Specify a space-separated list of static library files to link with the generated code.

Note If your list includes any Windows file name strings that contain spaces, each instance must be enclosed in double quotes within the argument string, for example,

'mathutil.lib "op utils.lib"'

CustomSource
string - ''

Real-Time Workshop > Custom Code > Source files

Specify a space-separated list of source files to compile and link with the generated code.

Note If your list includes any Windows file name strings that contain spaces, each instance must be enclosed in double quotes within the argument string, for example,

'algs.c "div alg.c"'

CustomSourceCode
string - '' Real-Time Workshop > Custom Code > Source file Specify code to appear at the top of the generated model.c source file.

CustomTerminator
string - '' Real-Time Workshop > Custom Code > Terminate function Specify code to appear in the model generated terminate function.

RTWUseSimCustomCode
string - off, on Real-Time Workshop > Custom Code > Use the same custom code settings as Simulation Target Specify whether to use the same custom code settings as those in the Simulation Target > Custom Code pane.

Command-Line Information: Real-Time Workshop Pane: Debug Tab

Parameter and Values	Configuration Parameters Dialog Box Equivalent	Description
`ProfileTLC` string - `off`, `on`	Real-Time Workshop > Debug > Profile TLC	Profile the execution time of each TLC file used to generate code for this model in HTML format.
`RTWVerbose` string - `off`, `on`	Real-Time Workshop > Debug > Verbose build	Display messages indicating code generation stages and compiler output.
`RetainRTWFile` string - `off`, `on`	Real-Time Workshop > Debug > Retain .rtw file	Retain the `model``.rtw` file in the current build directory.
`TLCAssert` string - `off`, `on`	Real-Time Workshop > Debug > Enable TLC assertion	Produce a TLC stack trace when the argument to the `assert` directives evaluates to `false`.
`TLCCoverage` string - `off`, `on`	Real-Time Workshop > Debug > Start TLC coverage when generating code	Generate `.log` files containing the number of times each line of TLC code is executed during code generation.
`TLCDebug` string - `off`, `on`	Real-Time Workshop > Debug > Start TLC debugger when generating code	Start the TLC debugger during code generation at the beginning of the TLC program. TLC breakpoint statements automatically invoke the TLC debugger regardless of this setting.

Command-Line Information: Real-Time Workshop Pane: Interface Tab

Parameter and Values Configuration Parameters Dialog Box Equivalent Description

ExtMode
off, on Real-Time Workshop > Interface > Interface Specify the data interface to be generated with the code.

ExtModeMexArgs
string ('') Real-Time Workshop > Interface > Interface > External > MEX-file arguments Specify arguments that are passed to an external mode interface MEX-file for communicating with executing targets.

ExtModeStaticAlloc
off, on Real-Time Workshop > Interface > Static memory allocation Use a static memory buffer for external mode instead of allocating dynamic memory (calls to malloc).

ExtModeStaticAllocSize
integer (1000000) Real-Time Workshop > Interface > Static memory buffer size Specify the size in bytes of the external mode static memory buffer.

ExtModeTransport
int - 0 for TCP/IP, 1 for 32-bit Windows serial Real-Time Workshop > Interface > Interface > External > Transport layer Specify transport protocols for external mode communications.

GenerateASAP2
off, on Real-Time Workshop > Interface > Interface Specify the data interface to be generated with the code.

GenFloatMathFcnCalls
string - ANSI_C, C99 (ISO), GNU99 (GNU)

(For ERT-based models, additional target-specific values may be available; see the Target function library drop-down list in the Configuration Parameters dialog box.)

Real-Time Workshop > Interface > Target function library

Specify a target-specific math library for your model. Verify that your compiler supports the library you want to use; otherwise compile-time errors can occur.

ANSI_C - ISO/IEC 9899:1990 C standard math library for floating-point functions

C99 (ISO) - ISO/IEC 9899:1999 C standard math library

GNU99 (GNU) - GNU gcc math library, which provides C99 extensions as defined by compiler option -std=gnu99

LogVarNameModifier
string - none, rt_, _rt Real-Time Workshop > Interface > MAT-file variable name modifier Augment the MAT-file variable name.

MatFileLogging (ERT)
string - off, on Real-Time Workshop > Interface > MAT-file logging Generate code that logs data to a MAT-file.

RTWCAPIParams
string - off, on Real-Time Workshop > Interface > Parameters in C API Generate parameter tuning structures in C API.

RTWCAPISignals
string - off, on Real-Time Workshop > Interface > Signals in C API Generate signal structure in C API.

UtilityFuncGeneration
string - Auto, Shared location Real-Time Workshop > Interface > Utility function generation Specify where utility functions are to be generated.

Command-Line Information: Not in GUI

Parameter and Values	Configuration Parameters Dialog Box Equivalent	Description
`CodeGenDirectory`	Not available	For MathWorks™ use only.
`Comment`	Not available	For MathWorks use only.
`CompOptLevelCompliant` `off`, `on`	Not available	Set in `SelectCallback` for a target to indicate whether the target supports the ability to use the Compiler optimization level parameter on the Real-Time Workshop pane to control the compiler optimization level for building generated code. Default is `off` for custom targets and `on` for targets provided with the Real-Time Workshop and Real-Time Workshop Embedded Coder products.
`ConfigAtBuild`	Not available	For MathWorks use only.
`ConfigurationMode`	Not available	For MathWorks use only.
`ConfigurationScript`	Not available	For MathWorks use only.
`ERTCustomFileBanners`	Not available	For MathWorks use only.
`EvaledLifeSpan`	Not available	For MathWorks use only.
`ExtModeMexFile`	Not available	For MathWorks use only.
`ExtModeTesting`	Not available	For MathWorks use only.
`FoldNonRolledExpr`	Not available	For MathWorks use only.
`GenerateFullHeader`	Not available	For MathWorks use only.
`IncAutoGenComments`	Not available	For MathWorks use only.
`IncludeRegionsInRTWFile BlockHierarchyMap`	Not available	For MathWorks use only.
`IncludeRootSignalInRTWFile`	Not available	For MathWorks use only.
`IncludeVirtualBlocksInRTW FileBlockHierarchyMap`	Not available	For MathWorks use only.
`IsERTTarget`	Not available	For MathWorks use only.
`IsPILTarget`	Not available	For MathWorks use only.
`ModelReferenceCompliant` string - `off`, `on`	Not available	Set in `SelectCallback` for a target to indicate whether the target supports model reference.
`ParamNamingFcn`	Not available	For MathWorks use only.
`PostCodeGenCommand` `string` - `''`	Not available	Add the specified post code generation command to the model build process.
`PreserveName`	Not available	For MathWorks use only.
`PreserveNameWithParent`	Not available	For MathWorks use only.
`ProcessScript`	Not available	For MathWorks use only.
`ProcessScriptMode`	Not available	For MathWorks use only.
`RTWCAPIStates`	Not available	For MathWorks use only.
`SignalNamingFcn`	Not available	For MathWorks use only.
`SystemCodeInlineAuto`	Not available	For MathWorks use only.
`TargetFcnLib`	Not available	For MathWorks use only.
`TargetLibSuffix` `string` - `''`	Not available	Control the suffix used for naming a target's dependent libraries (for example, `_target.lib` or `_target.a`). If specified, the string must include a period (.). (For generated model reference libraries, the library suffix defaults to `_rtwlib.lib` on Windows systems and `_rtwlib.a` on UNIX systems.)
`TargetPreCompLibLocation` `string` - `''`	Not available	Control the location of precompiled libraries. If you do not set this parameter, the code generator uses the location specified in `rtwmakecfg.m`.
`TargetPreprocMaxBitsSint` int - `32`	Not available	Specify the maximum number of bits that the target C preprocessor can use for signed integer math.
`TargetPreprocMaxBitsUint` int - `32`	Not available	Specify the maximum number of bits that the target C preprocessor can use for unsigned integer math.
`TargetTypeEmulationWarn SuppressLevel SuppressLevel` int - `0`	Not available	When greater than or equal to 2, suppress warning messages that the Real-Time Workshop software displays when emulating integer sizes in rapid prototyping environments.

Real-Time Workshop Pane: Tornado Target

Configuration Parameters for Embedded MATLAB Coder

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