High-priority tasks immediately interrupt lower-priority tasks.
Because ISO 17356 is essentially the international standardization of the original OSEK/VDX consortium documents, the technical content is largely identical to the freely available "OSEK OS 2.2.3" specification. iso 17356-3 pdf
ISO 17356-3:2005 is the official international standard that describes the concept of a real-time operating system (RTOS) for motor vehicles [7†L5-L6]. Its official title is "Road vehicles — Open interface for embedded automotive applications — Part 3: OSEK/VDX Operating System (OS)" [0†L4-L6]. Its official title is "Road vehicles — Open
When implementing or compliance-checking an automotive system, ensure you acquire an authorized copy of the document: These are defined in a syntax similar to
Time-based services to trigger tasks or events.
The standard's requirements are comprehensive, covering the essential services an automotive RTOS must provide. These are defined in a syntax similar to ISO/ANSI-C to promote portability [10†L25-L27].
: Covers task states, priority handling, and scheduling policies (preemptive or non-preemptive) for real-time performance. Resource Management : Uses the Priority Ceiling Protocol