F2010H029
The FlexRay Diagnosis System on the Basis of ARM
FlexRay is communication network for the distributed automotive systems. It supports dual channels for fault tolerance and guarantees message latency by using time-triggered method. And it supports up to 10 Mbps communication speed. In future vehicle, FlexRay network will be used in chassis or safety system. Also it will be used in the backbone connected between vehicle network, such as LIN or CAN. Intelligent vehicle system should provide the diagnosis information for driving safely. Especially the state information of Electronic Control Unit (ECU) to control sensors or actuators should check by periods. Because this information is not provide to driver generally, although ECU occur trouble driver is hard to know it. If driver know partial problem early, he will prevent to expand into a big problem. Accordingly we suggest diagnosis function using the graphical method. For graphical monitoring system we use PXA270 microcontroller. PXA270 is one of the ARM9 core produced by Intel. It includes LCD controller and has high processing power. Accordingly it is suited for network monitoring system. This system operates on the based embedded linux and it watches the state of FlexRay network and ECU and displays each ECU's state information. If specific ECU occurs obstacle, diagnosis system display and control corrupt ECU. In order to implement this diagnosis system in the FlexRay network, we use two microcontrollers, MC9S12XF512 and PXA270. The first include FlexRay controller, the second does not include it. FlexRay controller is divided by internal or external. Internal controller means that controller exists in microcontroller such as MC9S12XF512. On the other hand external controller only operates the function of FlexRay controller. This external controller exist MFR4310 produced in Freescale. After this controller combines with other microcontroller, microcontroller supports FlexRay communication. Therefore this paper suggests ECU monitoring system using with PXA270 microcontroller and MFR4310 FlexRay controller.
This abstract is supplemented by a PDF, which can be viewed here.
Poster presentation: Efficient production and operation of vehicles and components