"ISO 17356标准概述及OSEK系统生成与实现语言V2.5.0详解"

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本文主要介绍了关于OSEK System Generation和OSEK Implementation Language（OIL）的相关内容。OSEK是一种用于车载电子系统的开放式系统和相应接口的标准。其某些部分已经被ISO17356标准化。 ISO 17356由多个部分组成，包括OSEK Glossary、OSEK Binding Specification、OSEK OS、OSEK COM、OSEK NM和OSEK OIL。其中，OSEK Glossary位于OSEK Binding 1.4.1，是ISO 17356-1的一部分，包含了ISO风格的介绍和术语表。OSEK Binding Specification是基于OSEK Binding 1.4.1的，是ISO 17356-2的一部分，除了术语表。OSEK OS是基于OSEK OS 2.2.1的，是ISO 17356-3的一部分。OSEK COM是基于OSEK COM 3.0.2的，是ISO 17356-4的一部分。OSEK NM是基于OSEK NM 2.5.2的，是ISO 17356-5的一部分。OSEK OIL是基于OIL 2.4.1的，是ISO 17356-6的一部分。而关于OSEK System Generation和OSEK Implementation Language（OIL），相关的文档为"OSEK_VDX_System Generation_OSEK_Implementation_Language(OIL)_V2.5.0_2004.pdf"。该文档是OSEK / VDX System Generation OIL的官方发布版本，取代了之前的所有文档。OSEK组保留对该文档进行更改的权利，并且不对错误承担任何责任。在这份文档中，介绍了OSEK Implementation Language Version 2.5的内容。总结来说，OSEK System Generation和OSEK Implementation Language（OIL）是用于车载电子系统的标准和相应的实现语言。ISO17356对该标准的一部分进行了标准化。相关的文档"OSEK_VDX_System Generation_OSEK_Implementation_Language(OIL)_V2.5.0_2004.pdf"介绍了该标准的具体内容。

OSEK/VDX

OSEK Implementation Language

Specification 2.5

OSEK/VDX OIL 2.5  by OSEK Page 12

2.3.9 Include mechanism

The include mechanism allows for separate definitions for some parts of OIL. The

implementation definition can be delivered with an OSEK implementation and used (included)

by the system designer.

The include statement has the same syntax as in ISO/ANSI-C:

#include <file>

#include "file"

• For each OIL tool there must be a way to specify search-paths for include files.

• #include <file> uses the search-path

• #include "file" uses the directory where the including file resides

Placement of include directives

The same rules apply as for ISO/ANSI-C, e.g. the include statement has to be on a separate

line and can appear anywhere in the description files.

2.3.10 Comments

The OIL file may contain C

-style comments (/* */ and //). C

rules apply.

2.3.11 Descriptions

To describe OIL objects, attributes, and values, the OIL syntax offers the concept of

descriptions. Descriptions are optional. They start after a colon (:), are enclosed in double

quotes ("), and must not contain a double quote.

Example:

...

BOOLEAN START = FALSE:"Automatic start of alarm on system start";

...

Descriptions give the user additional information about OIL objects, attributes and values in a

well-defined format. The interpretation of descriptions is implementation-specific.

OSEK/VDX

OSEK Implementation Language

Specification 2.5

OSEK/VDX OIL 2.5  by OSEK Page 13

3 OIL Object Definitions

3.1 Rules

The application configuration files must conform to some rules to be successfully processed.

These rules are:

• All objects are described using the OIL syntax.

• Each object must have a unique name. Each object may be divided into several parts.

• All object names must be accessible from the application.

• An attribute defines some object properties (for example, the task priority). Attributes that

take a single value may only be specified once per object. Attributes that take a list of

values must be specified as multiple statements.

• An object can have a set of references to other objects. Per object, there may be more than

one reference to the same type of object (e.g. more than one reference to different events,

see example in section 3.2.4.8).

• Unless stated otherwise, values must be defined for all standard attributes of all objects,

except for multiple attributes, which can be empty.

• If default values are required for standard attributes, they are specified in this document

and must not be changed.

• The <name> non-terminal represents any ISO/ANSI-C identifier.

• The <number> non-terminal represents any integer constant. The range of integers is

determined by the target platform. Both decimal and hexadecimal integers are allowed, and

using the same notation as C. Decimal integers with leading zeroes are not allowed as they

might be misinterpreted as octal values.

• The <string> non-terminal represents any 8-bit character sequence enclosed in double-

quotes ("), but not containing double-quotes.

• The description represents any 8-bit character sequence enclosed in double-quotes ("), but

not containing double-quotes.

• A reference defines a unidirectional link to another object (for example, the task X has to

be activated when the alarm Y expires).

• Implementation-specific additional parameters are only allowed for optional attributes. For

portability reasons, it is forbidden to define implementation-specific additional parameters

for standard attributes.

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