共查询到17条相似文献,搜索用时 140 毫秒
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提出了一种基于CAN总线和LIN总线的混合网络体系.设计了CAN/LIN网关,给出了网关的硬件结构和软件流程.该混合网络体系兼备CAN总线高速数据传送和LIN总线结构简单的特点,成本低、可靠性高、适用范围广. 相似文献
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控制器局域网CAN总线已经广泛应用于嵌入式实时系统中,如车载实时控制与无人驾驶车辆领域。但是,随着嵌入式实时系统实时性要求的不断提高,系统的确定性以及总线带宽资源的限制受到了重视,而柔性时间触发控制器局域网(FTTCAN)可以同时支持时间触发和事件触发信息,集合了信息调度的确定性和灵活性,能够满足系统确定性、实时性要求。为了获得较高总线利用率及避免低优先级信息死锁,本文将优先级动态提升调度方法引入FTTCAN,通过调度车辆信息实例,验证了该算法良好的调度性能。 相似文献
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设计了一个基于LIN总线的车门控制系统。将驾驶侧车门控制模块作为LIN主节点,其它3门作为LIN从节点,给出了4门的硬件电路原理图;分析了软件设计流程图,包括主程序流程图,LIN主、从节点通信。 相似文献
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In view of the problem that the packet information preempted network resources in the process of transmission in the CAN bus, which leads to the low utilization of network resources and the low accuracy of information transmission. Thus, a hybrid scheduling algorithm NMTS based on CAN bus is proposed, in the NMTS hybrid scheduling algorithm, the dynamic scheduling algorithm EDF is used to schedule hard real-time messages to solve the problem of low utilization of network resources; the static scheduling algorithm RMS is used to schedule soft real-time messages and non real-time messages, so as to solve the problem of low accuracy of information transmission. By using MATLAB software, the CAN network model can be built, the EDF algorithm, RMS algorithm and NMTS algorithm are simulated. The experimental results show that the network resources utilization is 90%, the packet loss rate is 0% of the NMTS algorithm. Therefore, The hybrid scheduling algorithm based on CAN bus NMTS has the characteristics of high network resource utilization and high accuracy of information transmission, which will be very helpful for further research of CAN bus. 相似文献
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LIN协议是面向车辆低端分布式应用的串行通信协议,同CAN相结合可构成应用与汽车的分层网络结构。对该协议进行了详细描述,介绍了车身控制方案的整体结构,并介绍了CAN/LIN控制网络的典型硬件结构。 相似文献
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Efficient and fine scheduling algorithm for bandwidth allocation in ethernet passive optical networks 总被引:3,自引:0,他引:3
Biao Chen Jiajia Chen Sailing He 《IEEE journal of selected topics in quantum electronics》2006,12(4):653-660
A novel fine scheduling algorithm is introduced for upstream bandwidth allocation in an Ethernet-based passive optical network. This scheduling algorithm consists of an inter optical network unit (ONU) scheduler at the optical line terminal (OLT) and an intra-ONU scheduler at each ONU. In the inter-ONU scheduling, a novel GATE/REPORT approach is introduced to eliminate the unused remainders without transmission delay and maximize the utilization of bandwidth. Our novel intra-ONU scheduler gives fair bandwidth allocation to the queues of different priorities for each user in a hierarchical and decentralized way. Numerical results have shown that our overall scheduling algorithm can fulfill various requirements of delay and throughput for the transmission of multimedia traffic for each end user. 相似文献