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[Model Semantics] OsEvents - Counter in {Set|Clear}Event [message #1827491]

Fri, 15 May 2020 16:40

Benjamin Beichler

Messages: 4
Registered: April 2020

Junior Member

What is the aim and meaning of the Counter of SetEvent and ClearEvent? Should it be possible to recognize multiple SetEvents? Should WaitEvent directly return if the Counter > 0 and decrement the Counter?

This OSEK Spec (https://www.irisa.fr/alf/downloads/puaut/TPNXT/images/os223.pdf) do not say anything about a counter.

If the meaning is clear, please also put it into the Model Description.

[Updated on: Fri, 15 May 2020 16:40]

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Re: [Model Semantics] OsEvents - Counter in {Set|Clear}Event [message #1827776 is a reply to message #1827491]

Sat, 23 May 2020 10:48

Harald Mackamul

Messages: 15
Registered: November 2016

Junior Member

Counters are used several times in the AMALTHEA meta model. The meaning is always the same:

The Counter element describes an activation of a target element that happens only every n-th time.

prescaler Gives the number n for the activation, e.g. if set to 2, the target element is executed every second time.
offset Initial shift for the first execution of the target.

If for example prescaler is 5 and offset is 2 it is executed on the 2nd, 7th, 12th, ... time.

See APP4MC help > Data Models > Model Basics > Counters

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