MATLAB Programming

10 Scheduling Program Execution with Timers
Creating and Executing Callback Functions
This section describes
• “Associating Commands with Timer Object Events” on page 10-14
• “Creating Callback Functions” on page 10-15
• “Specifying the Value of Callback Function Properties” on page 10-17
Note Callback function execution might be delayed if the callback involves
a CPU-intensive task such as updating a figure.
Associating Commands with Timer Object Events
The timer object supports properties that let you specify the MATLAB
commands that execute when a timer fires, and for other timer object events,
such as starting, stopping, or when an error occurs. These are called callbacks.
To associate MATLAB commands with a timer object event, set the value of
the associated timer object callback property.
The following diagram shows when the events occur during execution of a
timer object and give the names of the timer object properties associated
with each event. For example, to associate MATLAB commands with a start
event, assign a value to the StartFcn callback property. Error callbacks can
occur at any time.
10-14