Real-Time Windows Target

Installing the Kernel

During installation, all software for the Real-Time Windows Target is copied onto your hard drive. The kernel, although copied to the hard drive, is not automatically installed. Installing the kernel sets up the kernel to start running in the background each time you start your computer.

After you install the Real-Time Windows Target (version 2.2), you can install the kernel. You need to install the kernel before you can run a Real-Time Windows Target executable:

1. In the MATLAB command window, type

• rtwintgt -install
  

1. MATLAB displays the message

   • You are going to install the Real-Time Windows Target kernel.
     Do you want to proceed? [y] : 
     

2. Continue installing the kernel. Type

• y
  

1. MATLAB installs the kernel and displays the message

   • The Real-Time Windows Target kernel has been successfully 
     installed.
     

   If a message is displayed asking you to restart your computer, you need to restart your computer before the kernel runs correctly.

3. Check that the kernel was correctly installed. Type

• rtwho
  

1. MATLAB should display a message similar to

   • Real-Time Windows Target version 2.2 (C) The MathWorks, Inc. 
     1994-2002
     MATLAB performance = 100.0%
     Kernel timeslice period = 1 ms
     

Once the kernel is installed, you can leave it installed. After you have installed the kernel, it remains idle, which allows Windows to control the execution of any standard Windows application. Standard Windows applications include internet browsers, word processors, and MATLAB.

It is only during real-time execution of your model that the kernel intervenes to ensure that your model is given priority to use the CPU to execute each model update at the prescribed sample intervals. Once the model update at a particular sample interval completes, the kernel releases the CPU to run any other Windows application that may need servicing.

Real-Time Windows Target Kernel

Uninstalling the Kernel