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Real-Time Embedded Concurrency with RTIC and Embassy

Real-time embedded systems in Rust demand both concurrency and determinism—two properties that seem to conflict. This series teaches you how RTIC (Real-Time Interrupt-driven Concurrency) and Embassy (async embedded framework) solve this challenge in complementary ways. RTIC uses interrupt-driven execution with priority ceilings to guarantee bounded latency and predictable deadlines. Embassy layers async/await on top of hardware abstractions (HAL), letting you write clean async tasks without sacrificing safety. By the end of this series, you will understand when to choose each framework, how to safely share resources between interrupt handlers and tasks, and how to build production firmware that scales from microcontrollers to systems-on-chip.

The embedded Rust ecosystem has matured dramatically since 2024. Both RTIC and Embassy now power real devices in automotive, IoT, aerospace, and industrial settings. This series bridges the gap between tutorial-level examples and the complexity you face in actual products: managing power budgets, respecting hard deadlines, and handling hundreds of interrupts without memory fragmentation or priority inversion.

What You'll Learn​

  • How interrupt-driven (RTIC) and async-driven (Embassy) models differ and when each excels
  • Safe patterns for shared mutable state in concurrent embedded code
  • Timer-based scheduling and real-time task prioritization
  • Power-efficient patterns for battery-powered systems
  • Determinism analysis and latency measurement techniques
  • Production-grade resource management and error handling

Articles in This Series​

  1. Embassy vs RTIC: Choose Your Embedded Concurrency Model
  2. RTIC Interrupts and Shared Resources: Priority Ceilings Explained
  3. Writing Your First Embassy Task: Async Embedded Fundamentals
  4. Real-Time Timers and Schedulers: Deterministic Task Execution
  5. Handling Interrupts Without Blocking: Non-Blocking I/O Patterns
  6. Shared State in RTIC: Resource Locking and Mutual Exclusion
  7. Embassy Futures and Task Spawning: Building Async Firmware
  8. Low-Power Embedded Development: Sleep Modes and Power Management
  9. Deterministic Firmware with RTIC: Guaranteeing Hard Deadlines
  10. Building Hybrid Systems: Integrating RTIC and Embassy in Production