Embedded Firmware

Where Software Meets the Silicon

Embedded firmware is the lowest layer of the software stack — the code that runs directly on the hardware with minimal or no operating system abstraction in between. It’s where software interacts with the physical world at its most fundamental level: reading sensors, driving actuators, managing power, and executing control logic with precise, repeatable timing.

RFA writes firmware for microcontrollers and custom hardware where every detail matters — clock cycles, milliamps, microseconds. Our engineers develop solutions for resource-constrained environments where efficiency isn’t a nice-to-have but a hard requirement, and where the firmware’s behavior must be deterministic, testable, and reliable over the full life of the product.

Deterministic Control

Safety-critical and performance-sensitive systems require firmware that executes with precise, repeatable timing — every cycle, every time.

RFA engineers develop deterministic control solutions for applications where jitter and latency are unacceptable. Whether it’s a closed-loop control system responding to sensor input in microseconds, a safety interlock that must execute within guaranteed time bounds, or a synchronized multi-axis motion system, we design firmware architectures that deliver the timing guarantees your application demands.

We validate timing behavior through rigorous testing and analysis — because in deterministic systems, “usually fast enough” isn’t good enough.

Power Management

For battery-powered, solar-powered, or energy-harvested devices, every milliamp counts. RFA develops firmware that maximizes operational life while maintaining the responsiveness your application requires.

• Sleep & Wake Strategies — intelligent duty cycling that keeps the system in low-power states as long as possible without missing critical events
• Dynamic Clock & Voltage Scaling — adjusting processor speed and voltage based on real-time workload to minimize consumption
• Peripheral Management — selectively enabling and disabling subsystems to reduce idle power draw

Our firmware keeps field-deployed and resource-constrained devices running longer between charges, maintenance visits, or battery replacements.

RTOS & Bare-Metal Architectures

Not every application needs an operating system, and not every application should go without one. RFA helps you select and implement the right execution model based on your requirements for timing, complexity, memory footprint, and maintainability.

• Bare-Metal — maximum control and minimal overhead for simple, timing-critical applications where every instruction matters
• RTOS (FreeRTOS, MBedOS, OpenRTOS) — task scheduling, priority management, and resource sharing for applications that need to handle multiple concurrent responsibilities without sacrificing determinism
• Hybrid Approaches — combining bare-metal interrupt-driven routines with RTOS-managed tasks when the application demands both raw speed and structured concurrency

We match the architecture to the problem — not the other way around.