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coder.descriptor.LookupTableDataInterface Class

Namespace: coder.descriptor
Superclasses: coder.descriptor.DataInterface

Return information about Lookup Table blocks that have tunable parameters

Since R2020a

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Description

The coder.descriptor.LookupTableDataInterface object describes various properties for these Lookup Table blocks that have tunable parameters in the generated code:

  • 1-D Lookup Table

  • 2-D Lookup Table

  • n-D Lookup Table

  • Interpolation Using Prelookup

  • Sine

  • Cosine

Creation

params = getDataInterfaces(codeDescObj, dataInterfaceName) creates a coder.descriptor.LookupTableDataInterface object if the model has a Lookup Table block that has tunable parameters. The codeDescObj object is the coder.codedescriptor.CodeDescriptor object created for the model by using the getCodeDescriptor function.

Input Arguments

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Specify the Parameters data interface type.

Example: Parameters

Properties

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The data type associated with the data such as integer, double, matrix, and its properties.

Attributes:

GetAccess
public
SetAccess
public

The Simulink identifier (SID) is a unique number within the model that Simulink assigns to the block.

Attributes:

GetAccess
public
SetAccess
public

The name of the associated tunable parameter for the table data.

Attributes:

GetAccess
public
SetAccess
public

The variant conditions in the model that interact with the data interface.

Attributes:

GetAccess
public
SetAccess
public

Description of how the data in the generated code is implemented. This property describes characteristics such as data type and size. It also describes how the data is accessed or declared in the code. The property describes if the data is declared as a variable or structure member.

Attributes:

GetAccess
public
SetAccess
public

The rate at which data is accessed in a run-time environment.

Attributes:

GetAccess
public
SetAccess
public

Specified physical units as attributes on signals at the boundaries of model components.

Attributes:

GetAccess
public
SetAccess
public

The range of valid values for the block output signals.

Attributes:

GetAccess
public
SetAccess
public

Value that represents whether table is enabled for tunability of the effective size of the table, specified as 0 or 1.

Attributes:

GetAccess
public
SetAccess
public

Data Types: logical

Source of the breakpoint set information, specified as 'Explicit values' (default), 'Even spacing', or 'Reference'. The breakpoint specification is mapped as:

  • Explicit values — STD_AXIS

  • Reference — COM_AXIS

  • Even spacing — FIX_AXIS

For more information on ASAP2 lookup tables, see Define ASAP2 Information for Lookup Tables.

Attributes:

GetAccess
public
SetAccess
public

Data Types: char

Return value of the lookup table operation.

Attributes:

GetAccess
public
SetAccess
public

Vector of coder.descriptor.BreakpointDataInterface objects that are used in the Lookup Table block. These objects contain the breakpoint set data.

Attributes:

GetAccess
public

Methods

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Examples

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Open Live Script

This example shows how to retrieve the lookup table block information.

Build a model

Open and build a model that contains lookup table blocks.

open_system('ASAP2Demo');
slbuild('ASAP2Demo');
### Searching for referenced models in model 'ASAP2Demo'.
### Found 1 model reference targets to update.
### Starting serial model reference code generation build.
### Successfully updated the model reference code generation target for: ASAP2DemoModelRef
### Starting build procedure for: ASAP2Demo
### Successful completion of build procedure for: ASAP2Demo

Build Summary

Model reference code generation targets:

Model              Build Reason                                 Status                        Build Duration
============================================================================================================
ASAP2DemoModelRef  Target (ASAP2DemoModelRef.c) did not exist.  Code generated and compiled.  0h 0m 8.2338s 

Top model targets:

Model      Build Reason                                         Status                        Build Duration
============================================================================================================
ASAP2Demo  Information cache folder or artifacts were missing.  Code generated and compiled.  0h 0m 16.677s 

2 of 2 models built (0 models already up to date)
Build duration: 0h 0m 26.781s

Return properties of Lookup Table parameter

Create a code descriptor object for the model.

codeDescObj = coder.getCodeDescriptor('ASAP2Demo');

Return properties of the Lookup Table parameter.

params = getDataInterfaces(codeDescObj,'Parameters');

The params variable is an array of coder.descriptor.DataInterface and coder.descriptor.LookupTableDataInterface objects. The model ASAP2Demo contains three Lookup Table blocks. Only two of them have tunable breakpoint set data. The code generator creates only two corresponding coder.descriptor.LookupTableDataInterface objects.

Obtain the details of the Standard_Axis block by accessing the sixth location in the array.

params(6)
ans = 
  LookupTableDataInterface with properties:
                       Type: [1x1 coder.descriptor.types.Type]
                        SID: 'ASAP2Demo:12'
              GraphicalName: 'tabledata'
                VariantInfo: [1x0 coder.descriptor.VariantInfo]
             Implementation: [1x1 coder.descriptor.DataImplementation]
                     Timing: [1x0 coder.descriptor.TimingInterface]
                       Unit: 'rpm'
                      Range: [1x1 coder.descriptor.Range]
         SupportTunableSize: 0
    BreakpointSpecification: 'Explicit values'
                     Output: [1x1 coder.descriptor.DataInterface]
                Breakpoints: [1x2 coder.descriptor.BreakpointDataInterface Sequence]

Version History

Introduced in R2020a

See Also

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