OCEOS

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Introduction

OCEOS is a pre-emptive real time operating system (RTOS) with a small memory footprint intended for hard real time systems that use the GR716 micro-controller [ref.].

It was developed by O.C.E. Technology with support from the European Space Agency (ESA) under project 4000127901/19/NL/AS. This document describes the features and use of OCEOS, and details its behaviour and system calls.

Applicable and reference documents

Applicable Documents

ID Title Version
E40 ECSS Space engineering – Software, ECSS-E-ST-40C 06/03/09
Q80 ECSS Space product assurance – Software Product Assurance ECSS-Q-ST-80 15/02/17
SRS Software Requirements Specification, (OCEOS RTOS). OCE Technology 06/20 Version 3.0
ICD Interface Control Document, (OCEOS RTOS). OCE Technology, OCE-2018-ICD-001 05/12/18 Rev 2.0

Reference Documents

ID Title Version
BAK91 T. P. Baker. Stack-based scheduling of real-time processes. Journal of Real-Time Systems, 3, 1991. http://www.math.unipd.it/~tullio/RTS/2009/Baker-1991.pdf 1991
GRLIB GRLIB IP Library User’s Manual Apr 2018, Version 2018.1
IRD-GR716 GR716 LEON3FT Microcontroller, 2018 Advanced Data Sheet and User’s Manual, GR716-DS-UM, Cobham. Nov 2018 Version 1.26
SDD Software Design Document, OCE-2020-SDD-001 Rev 3.1, 01/07/2020
QR OCEOS-QuickReference.pdf Rev 1.0