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Signal Monitoring and Parameter Tuning Over XCP on CAN Using Third-Party Calibration Tools

You can use XCP-based External mode simulation over CAN to connect to the Texas Instruments™ C2000™ board from a third-party calibration software such as CANape and perform signal monitoring and parameter calibration. For information to configure the external mode with any available eCAN module, see Set Up CAN Communication with Target Hardware.

To configure the Simulink model for signal monitoring and parameter tuning using third-party calibration tools:

  1. In the Simulink model, enable the signals for logging. For more information, see Configure a Signal for Logging.

  2. Identify the parameters for tuning. For more information, see Create Tunable Calibration Parameter in the Generated Code (Simulink Coder).

  3. Open Configuration Parameters dialog box, go to the Hardware Implementation pane and select the connected Texas Instruments C2000 board from the Hardware board list.

  4. Go to Target hardware resources > eCAN tab to configure different parameters related to the CAN module on the target.

    Note

    If the target supports multiple eCAN modules, select the eCAN module to be used with external mode and then configure different parameters for the selected CAN module.

  5. Go to Target hardware resources > External mode tab, and choose XCP on CAN as the Communication interface.

    Note

    XCP on CAN Communication interface supports only Third party calibration tools as Host interface.

  6. Configure the eCAN module on the target.

    1. If the target supports multiple eCAN modules, select the CAN module to be used with external mode.

    2. Select the CAN ID type.

    3. Enter the values for CAN Master ID and CAN slave ID.

    4. Enter the values for Rx mailbox number and Tx mailbox number.

    5. Enter a suitable value for Logging buffer size.

  7. Go to Code Generation > Optimization and then set Default parameter behavior to Inlined.

  8. Click Apply and OK.

After you configure the Simulink model, you can initiate the Build for Monitoring action in Simulink and use the A2L file that is generated, for parameter calibration using third-party calibration tools.

  1. In the Hardware tab of Simulink toolstrip, click Build for Monitoring. This action builds and deploys the model on the target Texas Instruments C2000 board, and also generates an A2L file in the current MATLAB folder path. The A2L file contains XCP slave information for using in third-party calibration tools. The file name of the A2L file is in this format: <modelname>.a2l.

    For more information on A2L file generation, see Export ASAP2 File for Data Measurement and Calibration.

    Note

    Monitor & Tune option is disabled during this process because XCP on CAN Communication interface supports only Third party calibration tools as Host interface.

  2. Click Deploy in the Simulink Toolstrip to deploy the executable onto the target.

  3. Import the A2L file into third-party calibration tools, connect to the XCP slave, and start monitoring of signals and calibration of parameters using the interface in third-party calibration tool. For more information, refer to the example Calibrate ECU Parameters from Third-party Calibration Tools Using XCP-based CAN Interface.

Supported Objects and Data Types

The supported objects are:

Define data objects for the signals and parameters of interest for ASAP2 file generation. For ease of use, create a MATLAB® file to define the data objects so that you only have to set up the objects only once.

To set up tunable parameters and signal logging:

  1. Associate the parameters that you want to tune with Simulink.Parameter objects with ‘ExportedGlobal’ storage class. It is important to set the data type and value of the parameter object. For an example of how to create such a Simulink.Parameter object for tuning, see the following code:

    stepSize = Simulink.Parameter;
    stepSize.DataType = 'uint8';
    stepSize.CoderInfo.StorageClass = 'ExportedGlobal';
    stepSize.Value = 1;
  2. Associate the signals that you want to log with Simulink.Signal objects. Set the data type of the Simulink.Signal. The following code example shows how to declare such a Simulink.Signal object for logging.

    counter = Simulink.Signal;
    counter.DataType = 'uint8';
  3. Associate the data objects that you defined in the MATLAB file with parameters or signals in the model. For the previous code examples, you can set the Constant value in a Source block to stepSize, and set a Signal name to counter in the Signal Properties dialog box. The stepSize and counter are the data objects defined in the code.

The supported data types are:

  • uint8, int8

  • uint16, int16

  • uint32, int32

  • single

Note

Logging and tuning support of 64-bit double variables is supported only on TI F2838x (C28x) board.

Limitations

  • Logging and tuning of 32-bit double variables is not supported. Typecast 32-bit double to single variables using Data Type Conversion blocks as logging and tuning of single variables is supported.

  • Logging and tuning of complex numbers is not supported. However, it is possible to work with complex numbers by breaking down the complex number into its real and imaginary components. You can perform this breakdown using the following blocks in the Simulink Math Operations library: Complex to Real-Imag, Real-Imag to Complex, Magnitude-Angle to Complex, and Complex to Magnitude-Angle.

See Also