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时间触发协议(TTP)采用星型架构时,与总线型相比具有信号驱动能力强、扩展性好、安全性高等方面的技术优势。针对民用飞机实时控制系统中星型架构TTP总线的使用要求,从功能、时钟同步、安全性和集群模式等方面分析了星型TTP总线核心设备——集线器的技术特点,提出了基于FPGA的集线器设计架构和工作流程,为集线器的实现提供了指导。
Time-triggered protocol (TTP) with star architecture, compared with the bus-type signals with strong ability to drive, scalability, high security and technical advantages. In view of the requirements of the TTP bus for star architecture in the real-time control system of civil aircraft, this paper analyzes the technical features of hub-TTP, the core device of star TTP bus, from the aspects of function, clock synchronization, security and cluster mode. Design architecture and workflow provide guidance for the implementation of hubs.