coder.asap2.AxisInfo

Set values for axis to describe lookup table

Since R2022b

Description

Create an axis info object to define axis for a lookup table element and export it to an ASAP2 file.

Creation

axis = coder.asap2.AxisInfo creates an axis object. You can use the object to define axis for a lookup table element and export it to an ASAP2 file.

Properties

This table shows the fields of the axis object.

Element	Description
Name	Unique identifier in the ECU program
`LongIdentifier`	Description or comment
`EcuAddress`	Address of the element in memory
`RecordLayout`	Description of the various data structures
`AxisType`	Description of the axis
`InputQuantity`	Name of the measurement to be used as input quantity for the corresponding axis
`CompuMethodName`	Name of the conversion method
`MaxAxisPoints`	Maximum number of axis points
`LowerLimit`	Possible minimum value
`UpperLimit`	Possible maximum value
`AxisPointsRef`	Reference to the AXIS_PTS record for description of the axis points distribution
`FixAxisType`	Type of the fix axis
Distance	Distance attribute for FIX_AXIS_PAR and FIX_AXIS_PAR_DIST
Offset	Offset attribute for FIX_AXIS_PAR, FIX_AXIS_PAR_DIST, and list of values for FIX_AXIS_PAR_LIST
Format	Display format
`DisplayIdentifier`	Display name
`CalibrationAccess`	Access of the element for calibration
`EcuAddressComment`	Specify symbols for address replacement
`EcuAddressExtension`	Additional address information to distinguish different address spaces of an ECU (multi-micro controller devices)
`SymbolLink`	Reference to symbol name within a linker map file
`MaxRefresh`	Maximum refresh rate
`CustomData`	Any ASAP2 (a2l) snippet provided by the user

Examples

collapse all

Customize an ASAP2 File

Open Live Script

Add, update, filter, find, and remove ECU descriptions in an ASAP2 file.

Open and Build Example Model

Open the example model ASAP2Demo

open_system("ASAP2Demo");

Build the model.

rtwbuild("ASAP2Demo");

### 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

Code generation targets built:

Model              Action                        Rebuild Reason                       
======================================================================================
ASAP2DemoModelRef  Code generated and compiled.  ASAP2DemoModelRef.c does not exist.  

Top model targets built:

Model      Action                        Rebuild Reason                                    
===========================================================================================
ASAP2Demo  Code generated and compiled.  Code generation information file does not exist.  

2 of 2 models built (0 models already up to date)
Build duration: 0h 0m 24.625s

Create the ECU description object for the model.

descObj = coder.asap2.getEcuDescriptions("ASAP2Demo");

Get the list of available computation methods in the description object.

find(descObj,"CompuMethod")

ans = 1x10 string
    "ASAP2DemoModelRef_CM_double"    "ASAP2DemoModelRef_CM_int16_rpm"    "ASAP2Demo_CM_double"    "ASAP2Demo_CM_double_m_per__s_2_"    "ASAP2Demo_CM_double_rpm"    "ASAP2Demo_CM_int32"    "ASAP2Demo_CM_single"    "ASAP2Demo_CM_single_m_per__s_2_"    "ASAP2Demo_CM_single_rpm"    "ASAP2Demo_CM_uint8"

Filter the computation methods and get a list of computation methods that use rpm as the unit.

find(descObj,"CompuMethod",Units='rpm')

ans = 1x3 string
    "ASAP2DemoModelRef_CM_int16_rpm"    "ASAP2Demo_CM_double_rpm"    "ASAP2Demo_CM_single_rpm"

Create and Add Custom Computation Method

To add a new computation method to the ASAP2 file, create a custom computation method.

CompuMethod_CM1 = coder.asap2.CompuMethod;
CompuMethod_CM1.Name = 'CompuMethod_1';
CompuMethod_CM1.ConversionType = 'LINEAR';
CompuMethod_CM1.Coefficients = [2 3];
CompuMethod_CM1.LongIdentifier = 'longIdentifierTest';
CompuMethod_CM1.Format = '%2.3';
CompuMethod_CM1.Units = 's';

Add the custom computation method to the ECU description object.

add(descObj,CompuMethod_CM1);

Get the properties of the newly added computation method.

get(descObj,"CompuMethod","CompuMethod_1")

ans = 
  CompuMethod with properties:

               Name: 'CompuMethod_1'
     LongIdentifier: 'longIdentifierTest'
             Format: '%2.3'
              Units: 's'
       Coefficients: [2 3]
     ConversionType: 'LINEAR'
    CompuVTabValues: [1x1 struct]
         CustomData: ""

To modify a property of the computation method, use set function. Update the LongIdentifier field of the computation method.

set(descObj,"CompuMethod","CompuMethod_1",LongIdentifier="longIdentifierCM1")

Generate the ASAP2 file using the updated ECU description object and verify that the ASAP2 file contains the computation method CompuMethod_1.

coder.asap2.export("ASAP2Demo",CustomEcuDescriptions=descObj);

Following Characteristics or Measurements with unsupported data types are not exported in ASAP2 file. "ASAP2Demo_DW.ASAP2DemoModelRef_InstanceData"

Delete Computation Method

Remove the newly added computation method from the description object.

delete(descObj,"CompuMethod","CompuMethod_1");

Create and Add Custom Characteristic

To add a new characteristic to the ASAP2 file, create a custom characteristic.

Parameter_1 = coder.asap2.Characteristic;
Parameter_1.Name = 'Custom_parameter1';
Parameter_1.LongIdentifier = 'longIdentifierParam';
Parameter_1.UpperLimit = 255;
Parameter_1.LowerLimit = 0;

Add the custom characteristic to the ECU description object.

add(descObj,Parameter_1);

Get the properties of the newly added characteristic.

get(descObj,"Characteristic","Custom_parameter1")

ans = 
  Characteristic with properties:

                   Name: 'Custom_parameter1'
         LongIdentifier: 'longIdentifierParam'
                   Type: 'VALUE'
             EcuAddress: '0x0000'
        CompuMethodName: 'NO_COMPU_METHOD'
             LowerLimit: 0
             UpperLimit: 255
      EcuAddressComment: ""
    EcuAddressExtension: []
      CalibrationAccess: 'Calibration'
      DisplayIdentifier: ""
                 Format: ""
                BitMask: []
               AxisInfo: []
           RecordLayout: ""
             Dimensions: []
                 Export: 1
             MaxRefresh: [1x1 struct]
             SymbolLink: [1x1 struct]
             CustomData: ""

To modify a property of the characteristic, use set function. Update the UpperLimit field of the characteristic.

set(descObj,"Characteristic","Custom_parameter1",UpperLimit=128)

Generate the ASAP2 file using the updated ECU description object and verify that the ASAP2 file contains the characteristic Custom_parameter1.

coder.asap2.export("ASAP2Demo",CustomEcuDescriptions=descObj);

Following Characteristics or Measurements with unsupported data types are not exported in ASAP2 file. "ASAP2Demo_DW.ASAP2DemoModelRef_InstanceData"

Remove the newly added characteristic from the description object.

delete(descObj,"Characteristic","Custom_parameter1");

Create and Add Custom Measurement

To add a new measurement to the ASAP2 file, create a custom measurement.

Signal_1 = coder.asap2.Measurement;
Signal_1.Name = 'Custom_signal1';
Signal_1.LongIdentifier = 'longIdentifierSignal';
Signal_1.UpperLimit = 255;
Signal_1.LowerLimit = 0;

Add the custom measurement to the ECU description object.

add(descObj,Signal_1);

Get the properties of the newly added measurement.

get(descObj,"Measurement","Custom_signal1")

ans = 
  Measurement with properties:

                   Name: 'Custom_signal1'
         LongIdentifier: 'longIdentifierSignal'
               DataType: 'UBYTE'
             EcuAddress: '0x0000'
        CompuMethodName: ""
             LowerLimit: 0
             UpperLimit: 255
                 Raster: [1x1 struct]
      EcuAddressComment: ""
    EcuAddressExtension: []
      CalibrationAccess: 'NoCalibration'
      DisplayIdentifier: ""
                 Format: ""
                BitMask: []
             Dimensions: []
                 Export: 1
               MaskData: [1x1 struct]
             MaxRefresh: [1x1 struct]
             SymbolLink: [1x1 struct]
             CustomData: ""

To modify a property of the measurement, use set function. Update the CalibrationAccess field of the measurement.

set(descObj,"Measurement","Custom_signal1",CalibrationAccess='Calibration')

Generate the ASAP2 file using the updated ECU description object and verify that the ASAP2 file contains the measurement with name Custom_signal1.

coder.asap2.export("ASAP2Demo",CustomEcuDescriptions=descObj);

Following Characteristics or Measurements with unsupported data types are not exported in ASAP2 file. "ASAP2Demo_DW.ASAP2DemoModelRef_InstanceData"

Remove the newly added measurement from the description object.

delete(descObj,"Measurement","Custom_signal1");

Create and Add Lookup Table Parameter

Add a lookup table parameter.

LUT_Parameter = coder.asap2.Characteristic;
LUT_Parameter.Name = "custom_lookup_table";
LUT_Parameter.Type = "MAP";

Create and add axis information to the parameter.

axis_data = coder.asap2.AxisInfo;
axis_data(1).Name = 'BP3';
axis_data(2).Name = 'Bp4';
axis_data(1).CompuMethodName = 'ASAP2Demo_CM_double';
axis_data(2).CompuMethodName = 'ASAP2Demo_CM_double';
axis_data(1).MaxAxisPoints = '3';
axis_data(2).MaxAxisPoints = '3';
axis_data(1).AxisType = 'STD_AXIS';
axis_data(2).AxisType = 'STD_AXIS';
LUT_Parameter.AxisInfo = axis_data;

Add the lookup table parameter to the description object.

add(descObj,LUT_Parameter)

Generate the ASAP2 file using the updated ECU description object and verify that the ASAP2 file contains the lookup table parameter custom_lookup_table.

coder.asap2.export("ASAP2Demo",CustomEcuDescriptions=descObj);

Following Characteristics or Measurements with unsupported data types are not exported in ASAP2 file. "ASAP2Demo_DW.ASAP2DemoModelRef_InstanceData"

Version History

Introduced in R2022b