embOS RTOS

SEGGER embOS is a deterministic real-time operating system purpose-built for resource-constrained embedded systems where every byte of ROM and every microsecond of interrupt response time matters. With a kernel footprint under 1 KB of ROM and zero-interrupt-latency design, embOS ensures that hardware interrupts are never delayed by RTOS operations, a critical property for motor control, sensor fusion, and real-time communication protocols where timing jitter is unacceptable.

embOS Editions

embOS is available in four editions to match application requirements:

All four editions share the same API, making it straightforward to start with embOS Classic during prototyping and move to embOS Safe when the project enters certification. Each edition supports Arm Cortex-M, Cortex-A, Cortex-R, and RISC-V architectures with prebuilt ports for all major silicon vendors.

Core Capabilities

• Zero-interrupt-latency: hardware interrupts are never disabled by the kernel
• Deterministic scheduling: fixed upper bound on all RTOS API call times
• Unlimited tasks, semaphores, mailboxes, and timers: limited only by available RAM
• Round-robin and priority-based scheduling with optional time-slicing
• Power management hooks: tickless idle mode for battery-powered applications
• Memory pools and heap management: flexible dynamic memory with fragmentation control

SEGGER Ecosystem Integration

Royalty-free licensing means that per-unit production costs remain predictable regardless of volume. embOS integrates deeply across the SEGGER ecosystem:

• SystemView: real-time visualization of task scheduling, semaphore usage, and interrupt timing with zero-configuration RTOS awareness
• Ozone: kernel-aware debugging with task lists, stack usage, and resource views
• Embedded Studio: project templates and BSPs for instant bring-up on supported boards
• J-Link: RTT-based debug output and flash download without additional UART wiring
• emNet, emFile, emUSB, emWin: all SEGGER middleware is designed and tested for thread-safe operation under embOS

Watch the SEGGER embOS introduction

Teams already using J-Link debug probes and Embedded Studio benefit from a fully integrated SEGGER toolchain where every component is designed to work together.