THE CHALLENGEPicking the Right OS for Your Embedded Product
The choice between an RTOS and Linux shapes your entire product architecture. It affects your hardware costs, power consumption, development velocity, and long-term maintenance burden. We see teams make this decision based on what their engineers already know, rather than what the product actually needs. We have shipped products on both sides of this divide, and we help you choose based on real technical requirements, then execute the implementation with confidence.
RTOS VS LINUX
When to Use Each, and Why It Matters
Memory Requirements
Runs on devices with as little as 16 KB RAM. FreeRTOS kernel fits in under 10 KB of flash.
Minimum 32 MB RAM practical, 4 MB flash for a minimal root filesystem. Most products need 128 MB+ RAM.
Real-Time Guarantees
Deterministic microsecond-level response times. Interrupt latency is predictable and measurable.
Millisecond-level timing with PREEMPT_RT. Good enough for many applications, but hard real-time requires careful design.
Development Speed
Smaller codebase to understand, but fewer libraries available. More custom code needed for networking and protocols.
Vast ecosystem of userspace libraries and tools. Faster application development at the cost of higher system complexity.
Connectivity
Lightweight IP stacks (lwIP) and BLE stacks. Good for constrained wireless protocols like Zigbee, Thread, and BLE.
Full TCP/IP, Wi-Fi, cellular modems, and every protocol you can think of. The obvious choice for gateway and hub devices.
Power Consumption
Deep sleep modes with microamp-level standby current. The OS cooperates with hardware power management directly.
Higher baseline power draw. Sleep is possible but the wake-up time and idle current are significantly higher.
Security Updates
Smaller attack surface, but updates require firmware OTA. Limited isolation between components on most RTOS platforms.
Package-based updates, container isolation, and well-understood security models. More attack surface but better mitigation tools.
RTOS EXPERTISE
Real-Time Operating Systems We Deploy
We select the right RTOS based on your hardware platform, certification requirements, and ecosystem needs. Here are the platforms we work with most.
FreeRTOS
Resource-Constrained MCUsOur most deployed RTOS for Cortex-M based products. Minimal footprint, well-understood scheduler, and broad silicon vendor support. We use FreeRTOS on STM32, NXP, and Nordic platforms for products that need real-time task management on devices with limited RAM and flash.
Best for: Battery-powered sensors, motor controllers, small IoT devices
Zephyr
Modern IoT DevicesZephyr is our recommendation for new IoT product designs. The built-in networking stack, device tree hardware abstraction, and active upstream community make it a strong foundation. We contribute to Zephyr upstream and maintain custom board support packages for client hardware.
Best for: Connected wearables, BLE devices, Thread/Matter products
ThreadX (Azure RTOS)
Safety-Critical ApplicationsFor products that require safety certification, ThreadX offers pre-certified components for IEC 61508 and IEC 62304. We deploy ThreadX on medical devices and industrial safety systems where the certification documentation saves months of compliance work.
Best for: Medical devices, industrial safety systems, automotive components
What We Handle in RTOS Projects
Task Architecture Design
We design task structures with proper priority assignment, avoiding priority inversion and ensuring deterministic timing. Every task has defined stack sizes based on worst-case analysis, and we validate timing constraints under load.
Inter-Process Communication
Queues, semaphores, mutexes, and event groups designed for your specific data flow. We select the right IPC mechanism based on latency requirements, data size, and producer-consumer patterns in your application.
Memory Management
Static allocation strategies for safety-critical systems, or pool-based allocation for applications that need dynamic behavior. We analyze memory usage across all tasks and ensure your system stays within budget throughout its lifetime.
Real-Time Performance
We measure and optimize interrupt latency, context switch times, and worst-case execution paths. Our RTOS implementations meet hard real-time deadlines with verified timing margins.
LINUX EXPERTISE
Embedded Linux Platforms We Build On
We build custom Linux distributions tailored to your hardware and application needs. Every image we deliver is reproducible, optimized for your product, and ready for production.
Yocto Project
Custom Linux DistributionsWe build production Linux images with Yocto for application processors. Custom layers for your BSP, application recipes, and image configurations tuned for your specific hardware. Yocto gives us full control over every package and configuration in the root filesystem.
Best for: Gateways, HMI panels, industrial computers, smart appliances
Buildroot
Lightweight Linux SystemsWhen your product needs Linux but the system should stay lean, Buildroot delivers minimal images that boot fast and use little storage. We use Buildroot for products where Yocto is overkill and you need a simple, reproducible build system.
Best for: IP cameras, simple gateways, single-purpose Linux appliances
What We Handle in Linux Projects
BSP Development
Board support packages for custom hardware. Device tree configuration, pin muxing, clock setup, and power domain management. We bring up Linux on new boards and debug the low-level hardware interactions that make everything else work.
Device Driver Development
Kernel-space and user-space drivers for custom peripherals, sensor interfaces, and communication buses. We write drivers that follow upstream kernel coding standards and include proper error handling, power management callbacks, and sysfs interfaces.
Kernel Module Development
Loadable kernel modules for functionality that needs kernel-level access. Custom filesystems, network protocols, hardware abstraction layers, and security modules. We handle the kernel API changes across versions and maintain long-term support.
PREEMPT_RT Real-Time Patches
When your Linux application needs real-time guarantees, we apply and configure PREEMPT_RT patches. Thread-based interrupt handling, priority inheritance mutexes, and high-resolution timers for deterministic response times.
Bootloader Configuration
U-Boot customization for application processors and MCUboot for microcontroller targets. Secure boot chains, A/B partition schemes for safe OTA updates, and boot time optimization to get your product running fast.
System Optimization
Boot time reduction, RAM usage optimization, and storage footprint minimization. We profile the full boot sequence and trim unnecessary services, kernel modules, and libraries to meet your product requirements.
DEVELOPMENT INFRASTRUCTURE
Tooling That Makes Embedded Development Reliable
Cross-Compilation Toolchains
We set up and maintain GCC and LLVM cross-compilation toolchains for ARM, RISC-V, and other architectures. Reproducible build environments using Docker containers ensure every engineer on your team builds identical binaries.
CI/CD for Embedded
Automated build pipelines that compile firmware, run static analysis, execute unit tests on host, and trigger hardware-in-the-loop tests. We integrate with GitHub Actions, GitLab CI, or Jenkins depending on your existing setup.
Hardware-in-the-Loop Testing
Automated test rigs that flash firmware onto real hardware, run test sequences, and report results back to CI. We design HIL setups using commodity hardware and custom test fixtures that cover your critical functionality.
Debugging and Profiling
JTAG and SWD debugging with J-Link, ST-Link, and OpenOCD. We use Segger SystemView for RTOS task visualization, logic analyzers for bus protocol analysis, and custom instrumentation for performance profiling.
Ready to Build Your Embedded Software Stack?
Tell us about your embedded project. We will review your hardware platform, performance requirements, and timeline, then recommend the right OS and give you a clear development plan.
Schedule a Free Consultation