Create PIL Target Connectivity Configuration for MATLAB
Target Connectivity Configurations for PIL
Use target connectivity configurations and the target connectivity API to customize processor-in-the-loop (PIL) execution for your target environments.
Through a target connectivity configuration, you specify:
A target connectivity configuration name for a target connectivity API implementation.
Settings that define compatible MATLAB® code. For example, the code that is generated for a particular hardware implementation.
A PIL execution requires a target connectivity PIL API implementation that integrates third-party tools for:
Building the PIL application that runs on the target hardware
Downloading, starting, and stopping the application on the target
Communicating between MATLAB and the target
You can have many different connectivity configurations for
PIL execution. Register a connectivity configuration with MATLAB by
rtwTargetInfo.m file and placing it
on the MATLAB search path.
In a PIL execution, the software determines which of the available connectivity configurations to use. The software looks for a connectivity configuration that is compatible with the MATLAB code under test. If the software finds multiple or no compatible connectivity configurations, the software generates an error message with information about resolving the problem.
Create a Target Connectivity API Implementation
This diagram shows the components of the PIL target connectivity API.
You must provide implementations of the three API components:
Build API — Specify a toolchain approach for building generated code.
Launcher API — Control how MATLAB starts and stops the PIL executable.
Communications API — Customize connectivity between MATLAB and the PIL target. Embedded Coder® provides host-side support for TCP/IP and serial communications, which you can adapt for other protocols.
These steps outline how you create a target connectivity API
implementation. The example code shown in the steps is taken from
ConnectivityConfig.m file used in Processor-in-the-Loop Execution from Command Line.
Create a subclass of
ConnectivityConfig < rtw.connectivity.Config
In the subclass:
rtw.connectivity.MakefileBuilder, which configures the build process.
builder = rtw.connectivity.MakefileBuilder(componentArgs, ... targetApplicationFramework, ... exeExtension);
Create a subclass of
rtw.connectivity.Launcher, which downloads and executes the application using a third-party tool.
launcher = mypil.Launcher(componentArgs, builder);
rtiostreamAPI implementation of the host-target communications channel.
For the target side, you must provide the driver code for communications, for example, code for TCP/IP or serial communications. To integrate this code into the build process, create a subclass of
For the host side, you can use a supplied library for TCP/IP or serial communications. Instantiate
rtw.connectivity.RtIOStreamHostCommunicator, which loads and initializes the library that you specify.
hostCommunicator = rtw.connectivity.RtIOStreamHostCommunicator(... componentArgs, ... launcher, ... rtiostreamLib);
If you require execution-time profiling for generated code, create a timer object that provides details of the hardware-specific timer and associated source files. See Specify Hardware Timer for MATLAB.
If you require stack usage profiling for generated code, specify a driver implementation that obtains stack usage data from the target hardware. The driver must return the value of the stack register. If you do not specify a driver, the PIL simulation tries to use a default generic driver. See Implement Driver to Obtain Stack Usage Data During PIL Execution.
Register Target Connectivity Configuration
To register a target connectivity API implementation as a target connectivity configuration in MATLAB:
Create or update an
rtwTargetInfo.mfile. In this file:
Create a target connectivity configuration object that specifies, for example, the configuration name for a target connectivity API implementation and compatible MATLAB code.
Add the folder containing
rtwTargetInfo.mto the search path and refresh the MATLAB Coder™ library registration information.
For more information, see
Verify Target Connectivity Configuration
To verify your target connectivity configuration early on and
independently of your algorithm development and code generation, use
With the function, you can run a suite of tests. The function:
Runs the MATLAB function and performs PIL executions.
Compares results and produces errors if it detects differences.
For an example, see PIL Execution of Code Generated for a Kalman Estimator.