CODESYS Example: KnightRider

Introduction

This tutorial explains how to create a Knight Rider effect on the LEDs of a RevPi Compact. The digital output LEDs flash sequentially from left to right and back, replicating the iconic light effect.

Prerequisites

Hardware Requirements

• RevPi Compact

Software Requirements

• CODESYS Development System installed on your PC

Preparation

Hardware Setup:

Tipp: For detailed instructions about how to set up your system, refer to the Getting Started guide.

Software Setup:

note: To ensure a compatible system with suitable software, please refer the following links:

• CODESYS Software.

• CODESYS System Requirements.

Overview

The Knight Rider effect is achieved by:

1. Configuring AI Channel 1 on the RevPi Compact for the 0–10 V range in the Parameters tab.

2. Using two tasks:

   • POU_AdjustSpeed: Sets the time interval for the LED sequence based on the analog input value (AI_CH1).
   • POU_KnightRider: Implements the LED shifting effect on the digital outputs, creating the desired left-to-right and right-to-left pattern.