某并行机载数据传输总线研究

摘要

MⅢ总线是某军用飞机上的一种非标准的并行信息传输总线标准,总线地址数据独立,采用半双工工作方式,总线终端工作状态分为总线控制、远程终端和总线监控.在外场测试实验系统中,总线终端接口卡用于和系统中的仿真设备通信,PC机通过CPCI接口控制接口卡.采用一板复用的设计原则实现接口卡硬件.板载固件程序根据设备工作要求划分为具有层次性的逻辑子模块,采用硬件描述语言逐个实现并进行综合.经外场实验测试,接口卡各项性能指标满足设计要求.%The MⅢ bus is a data communication bus transmitted parallelly with separate data and address busses,it works at half-duplex mode,the terminal works at three different modes which is bus controller,remote terminal and monitor terminal.The card is used to communicate with simulation equipment in the out-field testing system,and controlled through CPCI interface by the computer.The hardware of the card is realized with design-reuse principle.The on-board program is divided into different modules according to the functional requirements,the logical functions of the modules are realized and synthesized in hardware description language.Through the test,the performance meets the design requirements.