AUTOSAR_SWS_SOMEIPTransformer.pdf

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Specification of SOME/IP Transformer

AUTOSAR CP Release 4.3.1

7 Functional specification

ECU 2 ECU 1

Sending Application

SWC

RTE

Com

SOME/IP

Serializer

Receiving Application

SWC

RTE

Com

SOME/IP

Deserializer

Figure 7.1: Overview of SOME/IP Transformer

When a SWC initiates an inter-ECU communication which is configured to be trans-

formed, the SWC hands the data over to the RTE. The RTE executes the configured

transformer chain which contains the SOME/IP Transformer (A transformer chain may

contain also other transformers but this is omitted in this overview for simplicity).

The SOME/IP Transformer on the sender side serializes the data of the SWC and

brings them into an linear form. The serialized data are sent via the communication

stack over the bus to the receiver(s). The RTE of the receiver executes the transformer

chain in the reverse order. The SOME/IP transformer of the receiver deserializes the

linear data back into the original data structure. These are handed over to the receiving

SWC.

From the SWC’s point of view it is totally transparent whether data are transformed or

not.

The SOME/IP transformer is a transformer of the class Serializer. It serializes struc-

tured data into a linear form. Therefore it can only be used as the first transformer on

the sending side and the last transformer on the receiving side (in execution order).

Furthermore it provides the transformer errors specified for this transformer class and

supports only out-of-place buffer handling.

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— AUTOSAR CONFIDENTIAL —

Document ID 660: AUTOSAR_SOMEIPTransformer

Specification of SOME/IP Transformer

AUTOSAR CP Release 4.3.1

The SOME/IP Transformer has no module specific EcuC because its whole configu-

ration is based on the SOMEIPTransformationDescription and SOMEIPTrans-

formationISignalProps.

Describable

TransformationDescription

«enumeration»

ByteOrderEnum

Attributes

+ mostSignificantByteFirst

+ mostSignificantByteLast

+ opaque

SOMEIPTransformationDescription

+ alignment :PositiveInteger

+ byteOrder :ByteOrderEnum

+ interfaceVersion :PositiveInteger

Describable

«atpVariation»

TransformationISignalProps

+ csErrorReaction :CSTransformerErrorReactionEnum [0..1]

SOMEIPTransformationISignalProps

+ implementsSOMEIPStringHandling :Boolean [0..1]

+ interfaceVersion :PositiveInteger [0..1]

+ messageType :SOMEIPMessageTypeEnum [0..1]

+ sessionHandlingSR :SOMEIPTransformerSessionHandlingEnum [0..1]

+ sizeOfArrayLengthFields :PositiveInteger [0..1]

+ sizeOfStructLengthFields :PositiveInteger [0..1]

+ sizeOfUnionLengthFields :PositiveInteger [0..1]

«enumeration»

SOMEIPTransformerSessionHandlingEnum

sessionHandlingActive

sessionHandlingInactive

FibexElement

ISignal

+ dataTypePolicy :DataTypePolicyEnum

+ iSignalType :ISignalTypeEnum [0..1]

+ length :Integer

«enumeration»

CSTransformerErrorReactionEnum

autonomous

applicationOnly

Identifiable

TransformationTechnology

+ hasInternalState :Boolean [0..1]

+ needsOriginalData :Boolean [0..1]

+ protocol :String

+ transformerClass :TransformerClassEnum

+ version :String

«enumeration»

SOMEIPMessageTypeEnum

Attributes

+ request

+ requestNoReturn

+ notification

+ response

+ error

+transformationDescription 0..1

«atpVariation»

+transformer

+transformationISignalProps

0..*

Figure 7.2: SOME/IP specific configuration

Class SOMEIPTransformationDescription

Package M2::AUTOSARTemplates::SystemTemplate::Transformer

Note The SOMEIPTransformationDescription is used to specify SOME/IP transformer

specific attributes.

Base ARObject, Describable, TransformationDescription

Attribute Type Mul. Kind Note

alignment PositiveInteger 1 attr Specifies the alignment of dynamic data in the

serialized data stream. The alignment shall be

specified in Bits.

byteOrder ByteOrderEnum 1 attr Defines which byte order shall be serialized by the

SOME/IP transformer

interfaceV

ersion

PositiveInteger 1 attr The interface version the SOME/IP transformer

shall use.

Table 7.1: SOMEIPTransformationDescription

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— AUTOSAR CONFIDENTIAL —

Document ID 660: AUTOSAR_SOMEIPTransformer

Specification of SOME/IP Transformer

AUTOSAR CP Release 4.3.1

Class atpVariation SOMEIPTransformationISignalProps

Package M2::AUTOSARTemplates::SystemTemplate::Transformer

Note The class SOMEIPTransformationISignalProps specifies ISignal specific configuration

properties for SOME/IP transformer attr ibutes.

Base ARObject, Describable, TransformationISignalProps

Attribute Type Mul. Kind Note

implement

sSOMEIP

StringHand

ling

Boolean 0..1 attr This attribute indicates whether Strings in the

SOME/IP message shall be processed according

to the SOME/IP specification for Strings. This

attribute has been introduced due to compatibility

reasons for AUTOSAR before R4.3. If this

attribute is set to true Strings in the payload shall

be handled according to the SOME/IP

specification on Strings. If this attr ibute is set to

false (or not set) no special handling for Strings in

the payload shall be performed.

interfaceV

ersion

PositiveInteger 0..1 attr The interface version the SOME/IP transformer

shall use.

messageT

ype

SOMEIPMessa

geTypeEnum

0..1 attr The Message Type which shall be placed into the

SOME/IP header.

sessionHa

ndlingSR

SOMEIPTransfo

rmerSessionHa

ndlingEnum

0..1 attr Defines whether the SOME/IP transformer shall

use session handling for Sender/Receiver

communication.

sizeOfArra

yLengthFie

lds

PositiveInteger 0..1 attr The size of all length fields (in Bytes) of fixed-size

arrays in the SOME/IP message. This attribute is

valid for all available occurrences of fixed-size

arrays in the SOME/IP message. For a more fine

granular modeling on the level of DataPrototypes

the DataPrototypeTransformationProps shall be

used.

sizeOfStru

ctLengthFi

elds

PositiveInteger 0..1 attr The size of all length fields (in Bytes) of structs in

the SOME/IP message. This attribute is valid for

all available occurrences of structures in the

SOME/IP message. For a more fine granular

modeling on the level of DataPrototypes the

DataPrototypeTransformationProps shall be used.

sizeOfUnio

nLengthFie

lds

PositiveInteger 0..1 attr The size of all length fields (in Bytes) of unions in

the SOME/IP message. This attribute is valid for

all available occurrences of Unions in the

SOME/IP message. For a more fine granular

modeling on the level of DataPrototypes the

DataPrototypeTransformationProps shall be used.

Table 7.2: SOMEIPTransformationISignalProps

Enumeration ByteOrderEnum

Package M2::AUTOSARTemplates::GenericStructure::GeneralTemplateClasses::Primitive

Types

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— AUTOSAR CONFIDENTIAL —

Document ID 660: AUTOSAR_SOMEIPTransformer

Specification of SOME/IP Transformer

AUTOSAR CP Release 4.3.1

• and the attribute version of the TransformationTechnology is set to 1

• and the attribute transformerClass of the TransformationTechnology is

set to serializer

c(SRS_Xfrm_00101)

7.1 Definition of Identifiers

[SWS_SomeIpXf_00001] d A service shall be identified using the Service-ID. c

(SRS_Xfrm_00008)

[SWS_SomeIpXf_00002] d Service-IDs shall be of type 16 bit length unsigned integer

(uint16). c(SRS_Xfrm_00008)

The Service-ID of 0xFFFE shall be used to encode non-SOME/IP services. See

[SWS_SomeIpXf_00130].

[SWS_SomeIpXf_00005] d Different services within the same vehicle shall have dif-

ferent Service-IDs. c(SRS_Xfrm_00008)

[SWS_SomeIpXf_00006] d A service instance shall be identified using the Service-

Instance-ID. c(SRS_Xfrm_00008)

[SWS_SomeIpXf_00007] d Service-Instance-IDs shall be of type 16 bit length un-

signed integer (uint16). c(SRS_Xfrm_00008)

The Service-Instance-IDs of 0x0000 and 0xFFFF shall not be used for a service,

since 0x0000 is reserved and 0xFFFF is used to describe all service instances. See

[SWS_SomeIpXf_00130].

[SWS_SomeIpXf_00009] d Different service instances within the same vehicle shall

have different Service-Instance-IDs.c(SRS_Xfrm_00008)

Note:

This means that two different camera services shall have two different ServiceInstance-

IDs SI-ID-1 and SI-ID-2. For one AUTOSAR system (that designs a vehicle product

line) SI-ID-1 shall be the same for all vehicles. The same is true for SI-ID-2. If consid-

ering another AUTOSAR system (that designs another vehicle product line), different

IDs may be used but it makes sense to use the same IDs among different AUTOSAR

systems for ease in testing and integration.

[SWS_SomeIpXf_00010] d Methods and events shall be identified inside a service

using a 16bit Method-ID, which is called Event-ID for events and notifications. c

(SRS_Xfrm_00008)

[SWS_SomeIpXf_00011] d Methods shall use Method-IDs with the highest bit set to 0,

while the Method-IDs highest bit shall be set to 1 for events and notifications of fields.

c(SRS_Xfrm_00008)

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— AUTOSAR CONFIDENTIAL —

Document ID 660: AUTOSAR_SOMEIPTransformer

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