🔧 Ardu-Stim Pattern Generator

Stop manually typing hundreds of array values. Build trigger wheel patterns visually, export C++ code instantly.

🚀 Try it live →

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The Problem

Creating custom trigger wheel patterns for Ardu-Stim means writing arrays like this:

const unsigned char pattern[] PROGMEM = {
  1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,
  1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,0,0
};

Nobody wants to count 72+ segments by hand or debug why their pattern is off by one tooth.

The Solution

Visual pattern builder that generates perfect C++ code every time:

• 🎯 Click to edit - Select wheel segments and toggle signals with mouse clicks
• 👀 See what you're building - Real-time wheel view + oscilloscope waveform preview
• ⚡ Smart tools - Quick presets for common patterns (36-1, 60-2) and bulk operations
• 📦 Export ready - Copy-paste C++ arrays straight into your wheel_defs.h
• 🔧 Multi-signal support - Crank + Cam1 + Cam2 patterns with proper bitwise encoding

Key Features

Interactive Wheel Builder

• Visual wheel with 4-720 configurable segments
• Selection-based editing (click segments, apply changes)
• Multi-select with Ctrl+Click and Shift+Click for ranges
• Color-coded signal visualization with gradient blending

Pattern Configuration

• Quick presets: 36-1 Crank (72 segments), 60-2 Crank (120 segments)
• Pattern tools: Clear All, Fill All, Invert Pattern
• Real-time validation and statistics
• Smart segment controls for common signal combinations

Live Preview System

• Synchronized wheel and oscilloscope visualizations
• Instant updates as you edit patterns
• Separate color-coded waveforms for Crank/Cam1/Cam2 signals
• Export scope view as PNG for documentation

Code Generation

• Properly formatted C++ PROGMEM arrays
• Includes pattern metadata and comments
• One-click copy to clipboard
• 100% compatible with Ardu-Stim wheel_defs.h format

Getting Started

Option 1: Use Online (Recommended) Just visit feb027.github.io/pattern-gen - no installation needed!

Option 2: Run Locally

git clone https://github.com/feb027/pattern-gen.git
cd pattern-gen
npm install
npm run dev

How It Works

1. Configure your pattern - Set name, segment count, and choose a preset or start from scratch
2. Edit visually - Click wheel segments to select them, then use controls to set signal states
3. Preview in real-time - Watch both wheel and scope views update as you build your pattern
4. Export code - Copy the generated C++ array and paste it into your project

Example: Creating a 36-1 Pattern

1. Click "36-1 Crank (72 seg)" preset
2. Pattern automatically loads with proper tooth spacing
3. Scope shows realistic crank signal waveform
4. Code output generates a complete PROGMEM array
5. Copy and use in your Ardu-Stim project

Technical Architecture

Built with modern web technologies for performance and maintainability:

• SvelteKit - Reactive framework with excellent developer experience
• HTML5 Canvas - Native graphics for smooth wheel and scope visualizations
• Tailwind CSS - Utility-first styling for rapid UI development
• Svelte Stores - Centralized state management with reactive updates
• Vite - Lightning-fast development and optimized production builds

Key Design Principles:

• State-driven reactive UI
• Modular component architecture
• Pure functions for pattern logic
• Zero external graphics dependencies

Project Status

✅ Phase 1-3 Complete - Core functionality fully implemented:

• Interactive wheel builder with multi-signal support
• Real-time pattern configuration and validation
• Live visualization system (wheel + scope views)
• C++ code generation and export

🚧 Phase 4-5 Planned - Advanced features:

• Image-to-pattern conversion from oscilloscope screenshots
• Enhanced pattern import/export capabilities
• Additional preset patterns for common engines

Contributing

This project has a clear scope and architecture. Contributions welcome for:

• Bug fixes and performance improvements
• Additional common engine patterns as presets
• UI/UX enhancements
• Test coverage expansion

See memory/ folder for detailed architecture and implementation docs.

Built For

🏎️ DIY automotive enthusiasts using standalone ECUs
🔧 Engine tuners and mechanics needing custom simulation patterns
💻 Speeduino/Ardu-Stim developers building trigger wheel definitions

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Try it now: feb027.github.io/pattern-gen

This tool generates Ardu-Stim compatible code but is not officially affiliated with the Ardu-Stim project.