| The rapid development of electronic industry and software technology has beenpushing automobile industry towards electronization and intelligentization. A moderncar is a complex system with the feature of electromechanical integration. At the sametime, with the increasing importance of automotive electronic system, the performanceof which has become a major indicator for the quality of a car. Automitive software isan important part of automotive electronic system. Now, improving the performance ofsoftware has become one of the most significant means to improve automobile elec-tronic system, since that there’s little room for the promotion of capability of hardware,under the pressure of cost.ECUs are the core components of automotive electronic system. Automotive net-work consists of ECUs linked together by buses, through which, software runs on di-fferent ECUs can sends data and communicates with each other. However, because ofthe diversity of ECU architectures and bus standards, it’s not easy for automotive soft-ware to utilize resources of automotive networks efficiently. So that, lack of portabilityand reusability has always been a main characteristic of automotive software. AUTO-SAR is the most widely used automotive software architecture with the highest degreeof standardization. To solve this problem, AUTOSAR proposed a communication me-chanism for automotive software, which makes the development of application softwarebeing independent from ECU architecture and network topology.This thesis makes a detailed and careful research and analysis of the communica-tion mechanism of AUTOSAR software architecture, and gives a design and imple-mentation of COM module and PDU Router module referencing AUTOSAR standards.Compared with existing other implementations, in this impelementation, COM moduleincreases support to I-PDU group and signal group, while, PDU Router enhances mana-gement of buffers and supports routing-on-fly in TP gateway operation. Besides, withthe help of configuration tool, this implementation features more configurability andscalability, and its conformity against standards is assured more precisely with the useof TTCN-3. Here are the main contents of this thesis:1) Firstly, researches the communication mechanism of AUTOSAR software archi-tecture. And from the point of view of abstraction, analyses how it makes the develop-ment of automotive application software being independent from ECU architecture andnetwork topology on a way top-down from VFB, RTE to communication service mo-dules.2) Secondly, designs and implements two communication service modules—COMand PDU Router.3) Thirdly, makes conformance test of COM and PDU Router modules againstAUTOSAR standards using test cases written in TTCN-3;4) Lastly, makes simulation tests of COM and PDU Router modules on Freescale’sMC9S12XEP100platform integtated with CAN and LIN drivers, with the help ofKvaser at PC. |
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