基于S12X系列双核单片机的Flexray-CAN总线网关的设计与实现  

Design of Flexray-CAN bus gateway based on S12X series dual-core MCU

作　　者：豆海利 陈晓飞 杨寒[2] 冯源[2] DOU Haili;CHEN Xiaofei;YANG Han;FENG Yuan(Department of Foundation,Air Force Engineering University,Xi’an 710065,China;AVIC Xi’an Aeronautics Computing Technique Research Institute,Xi’an 710065,China)

机构地区：[1]空军工程大学基础部,陕西西安710051 [2]航空工业西安航空计算技术研究所,陕西西安710065

出　　处：《现代电子技术》2019年第18期22-26,31,共6页Modern Electronics Technique

基　　金：航空科学基金(20150753010)~~

摘　　要：采用集成外设协处理器XGATE内核的16位双核单片机MC9S12XEP100作为主控制器,设计并实现了可以连接2路CAN总线和1路双通道Flexray总线的Flexray-CAN网关.采用ADI公司的信号和电源隔离集成器件,在满足产品小型化、低功耗、低成本的基础上,实现了CAN和Flexray总线接口的电气隔离,增强了通信接口的抗干扰能力.通过双核处理技术来优化网关的处理流程,从而避免了各种外设中断与网关的协议处理和消息转发间的冲突.实际应用表明,系统运行稳定可靠,与传统的采用单处理器实现的网关相比,网关的数据吞吐能力和实时性得到了明显改善.The 16.bit dual.core single.chip microcomputer MC9S12XEP100 with integrated peripheral co.processor XGATE core is used as the main controller to design and implement a Flexray-CAN gateway which can connect 2 CAN buses and 1 dual-channel Flexray bus.On the basis of meeting the requirements of miniaturization,low power consumption and low cost,the signal and power isolation integrated device of ADI company is applied to realize the electrical isolation of the bus interface be. tween CAN and Flexray,and enhance the anti-interference ability of the communication interface. The dual-core processing tech-nology is used to optimize the processing flow of gateway,thus avoiding the various conflicts between peripheral interrupts and protocol processing and message forwarding of gatewayThe practical application results show that the system runs stably and reliably,and the data throughput and real.time performance of the gateway are improved more obviously in comparison with the traditional gateway implemented by means of single processor.

关 键 词：无人机 Flexray-CAN网关 协处理器XGATE 双核单片机 网关硬件设计 电气隔离 中断处理 

分 类 号：TN943.34[电子电信—信号与信息处理] TP336[电子电信—信息与通信工程]