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Specification of Ethernet Interface
AUTOSAR Release 4.2.2
1 Introduction and functional overview
This specification specifies the functionality, API and the configuration of the
AUTOSAR Basic Software module Ethernet Interface.
In the AUTOSAR Layered Software Architecture, the Ethernet Interface belongs to the ECU Abstraction Layer, or more precisely, to the Communication Hardware
Abstraction.
This indicates the main task of the Ethernet Interface:
Provide to upper layers a hardware independent interface to the Ethernet
Communication System comprising multiple different Ethernet controllers and transceivers. This interface shall be uniform for all Ethernet controllers and transceivers. Thus, the upper layers (TCP/IP, EthSM, CDD) may access the underlying bus system in a uniform manner.
The Ethernet Interface does not directly access the Ethernet hardware (Ethernet
Communication Controller and Ethernet Transceiver) but by means of one or more hardware-specific driver modules.
[SWS_EthIf_00111]
⌈
In order to access the Ethernet controller(s), the Ethernet Interface shall use one or multiple Ethernet Driver modules, which abstract the specific features and interfaces of the respective Ethernet controller(s).
⌋ ()
[SWS_EthIf_00123]
⌈
In order to access the Ethernet transceiver(s), the Ethernet Interface shall use one or multiple Ethernet Transceiver Driver modules, which abstract the specific features and interfaces of the respective Ethernet transceiver(s).
⌋ ()
[SWS_EthIf_00228]
⌈
In order to access the Ethernet switch(es), the Ethernet Interface shall use one or multiple Ethernet Switch Driver modules, which abstract the specific features and interfaces of the respective Ethernet switch(es).
⌋ ()
[SWS_EthIf_00112]
⌈
Therefore, the Ethernet Interface executable code (however, not the configuration used during runtime) shall be completely independent of the Ethernet
Communication Controller(s).
⌋ ()
8 of 77 Document ID 417: AUTOSAR_SWS_EthernetInterface
- AUTOSAR confidential -
Specification of Ethernet Interface
AUTOSAR Release 4.2.2
TCP/IP EthSM
EthIf
CDD
Eth EthTrcv EthSwt
Figure 1: Ethernet stack module overview
Note: The Ethernet Interface is specified in a way that allows for object code delivery of the code module, following the "one-fits-all" principle, i.e. the entire configuration of the Ethernet Interface can be carried out without modifying any source code. Thus, the configuration of the Ethernet Interface can be carried out largely without detailed knowledge of the underlying hardware.
9 of 77 Document ID 417: AUTOSAR_SWS_EthernetInterface
- AUTOSAR confidential -
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