Micrium µC/OS-II / III for ARM/Cortex Microcontrollers

For more information:

Ohad Beit-On



ucOS-II & ucOS-III are Micrium’s advanced Real-Time Operating Systems (RTOS) designed specifically for deeply embedded applications. ucOS-II/III are highly portable, ROMable, scalable, preemptive, real-time, deterministic, multitasking kernel for microprocessors and microcontrollers. With a wide selection of add-on SW components, ported to your MCU device drivers, such as Embedded File System, TCP/IP stack, USB and more, you can build a complete system fast and reliable. 

Major Microcontrollers Support list

Atmel AVR32 arm7,9, Cortex                        (complete list of devices port)


Freescale Kinetis / Cortex-M3                        (complete list of devices port)


NXP LPCxxx Cortex-M0/3/4                          (complete list of devices port)


Silicon Labs / Energy Micro – Cortex-M3


STMicroelectronics STM32 Cortex-M0/3/4  (complete list of devices port)


TI Luminary Micro’s Stellaris                       (complete list of devices port)


 Offering unprecedented ease-of-use, μC/OS-III is delivered with complete 100% ANSI C source code and in-depth documentation. μC/OS-III runs on the largest number of processor architectures, with ports available for download from the Micrium Web site.

µC/OS-III manages an unlimited number of application tasks, constrained only by a processor’s access to memory. µC/OS-III also supports an unlimited number of priority levels (typically configured for between 8 and 256 different priority levels).

µC/OS-III allows for unlimited tasks, semaphores, mutexes, event flags, message queues, timers and memory partitions. The user allocates all kernel objects at run time. µC/OS-III provides features to allow stack growth of tasks to be monitored. While task size is not limited, they need to have a minimum size based on the CPU used.

µC/OS-III allows multiple tasks to run at the same priority level. When equal priority tasks are ready-to-run, µC/OS-III runs each for a user-specified amount of time. Each task can define its own time quanta and give up its time slice if it does not require the full time quanta.

µC/OS-III provides extensive range checking which can be disabled at compile time.  µC/OS-III thus checks for NULL pointers passed in API calls, task level services from ISRs aren’t called, arguments are within allowable range, and specified options are valid. Each API function provides an error code regarding the outcome of the function call.

µC/OS-III’s footprint can be scaled to contain only the features required for a specific application (typically 6–24 KBytes of code space residing in memory).


With uC/OS-II or III you can build your embedded systems with additional SW components and options:

מיקריום כמערכת



Compilers for C/C++Real Time Operating SystemsDebuggers & JTAG EmulatorsEmbedded Software Testing solutionsMiddleware & SW componentsHW Testing solutions – Boundary-Scan (JTAG) & FunctionalProtocol and Bus Analyzers & StimulatorsHome of CANopen, EtherCAT, PowerLink, ProfiNet– SW Protocols, devices & SolutionsIn-Circuit/Parallel Engineering & Production Device Programmers (Flash/EPROMs/CPLDs…)Video & Audio SW CODECs components

For more information: Ohad Beit-On ohad@sightsys.co.il 054-2584032