Real-Time Workshop

Program Execution

As the previous section indicates, a real-time program may not require 100% of the CPU's time. This provides an opportunity to run background tasks during the free time.

Background tasks include operations like writing data to a buffer or file, allowing access to program data by third-party data monitoring tools, or using Simulink external mode to update program parameters.

It is important, however, that the program be able to preempt the background task at the appropriate time to ensure real-time execution of the model code.

The way the program manages tasks depends on capabilities of the environment in which it operates.

External Mode Communication

External mode allows communication between the Simulink block diagram and the stand-alone program that is built from the generated code. In this mode, the real-time program functions as an interprocess communication server, responding to requests from Simulink.

Program Timing

Data Logging In Singletasking and Multitasking Model Execution