OCEOS real-time operating system

OCEOS block diagram

OCEOS is a real-time pre-emptive fixed priority operating system that can be used in applications that require European Cooperation for Space Standardization Category B or ISO 26262 standards. It has a small memory footprint (<10 kBytes), requires only one system stack rather than a stack for each task, and provides support for precisely timed data outputs independent of task scheduling. It is available initially for applications running on single-core ARM and SPARC based hardware with multicore release due shortly. The support of the European Space Agency in developing OCEOS is acknowledged. OCEOS provides the following facilities:

  • Fixed priority pre-emptive scheduling
  • Based on Stack Resource Policy – unbounded priority inversion, chained blocking, and deadlocks cannot occur.
  • Single stack rather than separate stack for each task
  • Small code footprint ( <10 kBytes for scheduling and mutex)
  • Mutex, Counting Semaphore, and Data Queue support
  • High precision timed actions (data output and task start
  • Supports SPARC V8 LEON2/3/4 and ARM Cortex-M single core targets
  • Enhancements for Cobham-Gaisler GR716 applications
  • DMON debug tool support (execution timeline, CPU usage)
  • Support & ISVV services available from OCE
  • Gold standard customer support package
  • Developed to ECSS Category B and ISO 26262 standards
  • Developed in cooperation with European Space Agency (ESA)
OCEOS App Debug in DMON
Debugging OCEOS application

Click here for detailed technical information from the OCE wiki