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俄制航空电子设备在地面维修检查与测试时,需要提供符合俄制OCT18977数据通信协议的控制平台。文章在介绍了俄制OCT18977数据总线控制电平、传输特点、编码协议的基础上,给出了基于ISA总线的俄制OCT18977数据总线控制卡的设计思想、硬件电路结构和原理、软件流程。
Russia-made avionics equipment in the ground maintenance inspection and testing, the need to provide consistent with the Russian OCT18977 data communication protocol control platform. Based on the introduction of the Russian OCT18977 data bus control level, transmission characteristics and coding protocol, the article gives the design idea, hardware circuit structure and principle, software flow of Russian OCT18977 data bus control card based on ISA bus.