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At Synopsys, we have a go-to example to showcase our test automation tool TPT: the Lights Controller.

These information are waiting for you now:

• Why such an easy example?
• Main functionality of our Lights Controller Example
• Interfaces of our Lights Controller Example
• Behavior of our Lights Controller Example
• Special Case ¨C Change to Auto-Mode
• Special Case ¨C Change of Light Intensity in Auto-Mode
• Different implementation types
• Where can I find it?
• Quick Tutorial
• Fun Fact

Why Such an Easy Example?

We use what at first glance appears to be a very simple example for several very good reasons:

• Simplicity: The operation of the Lights Controller is easy to explain and understand. It is therefore ideal for focusing full attention on the functionality of TPT.

• Manageable Scope: It provides a clear and concise demonstration of typical implementation mechanisms found in automotive software development, such as hysteresis times, threshold values, adjustable parameters, and internal states.

• Automotive Relevance: The Lights Controller represents a typical automotive function, making it relatable to industry professionals.

Main Functionality of our Lights Controller Example

The main function is calculating the control of the headlights. The output values can be on or off. This calculation takes into account two inputs: the position of the light switch and the light intensity.

Interfaces of our Lights Controller Example

The light switch has three positions: On, Off, and Auto Mode.

The light intensity ranges from 0% to 100%. The Lights Controller internally divides the light intensity into three regions: bright, twilight, and dark, using two parameters: MIN_LIGHT_ON (default: 60) and MIN_LIGHT_OFF (default: 70).

Special Case ¨C Change to Auto-Mode

When the light switch is set to Auto Mode from any position, the headlights should be turned on when it is dark and turned off when it is bright.

Different Implementation Types

While the functionality appears straightforward, testing it can sometimes be complex. Getting started with TPT should be as easy as possible for you.

Therefore, we have integrated our lights controller example in different variants (Simulink model, C or C++ code, Autosar software component, and more) directly into our TPT.

To show certain aspects, our example has been extended in some cases, e.g. to show the difference with and without scaled data types. But the main functionality is always the same.