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GJB289A总线具有很高的可靠性和灵活性,广泛应用于航空航天等领域。本文提出基于Aeroflex公司UT1553BCRTM协议芯片实现的GJB289A通信接口,完成了BC和RT的基本功能,支持同步通信和异步通信。文中对同步通信采用传统的静态总线控制协议,采用一种改进的静态总线控制技术,对非周期消息的异步通讯进行了详细说明。本设计有效地改善了GJB289A总线中非周期消息的传输延迟,保证了消息通讯的实时性。
GJB289A bus with high reliability and flexibility, widely used in aerospace and other fields. In this paper, the GJB289A communication interface based on the Aeroflex UT1553BCRTM protocol chip is proposed to fulfill the basic functions of BC and RT, supporting synchronous communication and asynchronous communication. In this paper, the traditional static bus control protocol is adopted for synchronous communication, and an improved static bus control technique is adopted to describe asynchronous communication of aperiodic messages in detail. The design effectively improves the GJB289A bus non-periodic message transmission delay, to ensure the real-time messaging.