🔴 Sigma Embedded — AUTOSAR DEM Simulators

Interactive tools to visualize and understand AUTOSAR DEM behavior in real time

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🚀 Overview

This repository provides a set of interactive web-based simulators for the AUTOSAR Diagnostic Event Manager (DEM).

Instead of only reading specifications, you can experiment and visualize how debounce algorithms and DTC states evolve.

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🧩 Simulators

🟠 Counter-Based Debounce

• Implements DemDebounceCounterBased
• Configurable increment/decrement steps
• Counter range: -127 ↔ +127
• State transitions:
  • PREPASSED → PASSED
  • PREFAILED → FAILED
• DTC storage & healing visualization

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🟢 Time-Based Debounce

• Implements DemDebounceTimeBased
• Adjustable thresholds:
  • FAILED timer
  • PASSED timer
• Real-time signal simulation (press & hold)
• Accurate ECU-like timing behavior

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🔵 Full DTC Status Byte (8-bit)

• Based on ISO 14229-1 / AUTOSAR SWS_Dem
• Includes:
  • testFailed
  • pendingDTC
  • confirmedDTC
  • warningIndicatorRequested
• Features:
  • Drive cycle (DCY)
  • Fault confirmation threshold
  • Aging mechanism
  • DTC clearing

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🎯 Purpose

AUTOSAR DEM is often difficult to understand from documentation alone.

This project allows you to:

• 👁️ Visualize behavior
• 🧠 Understand transitions
• ⚙️ Experiment with parameters
• 🚀 Learn faster through interaction

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🧠 What You’ll Learn

• Counter-based vs Time-based debounce
• DTC lifecycle (pending → confirmed → cleared)
• Drive cycle behavior
• Full 8-bit DTC status logic