基于CPLD的某型航管应答机控制接口设计  

Design of Control Interface for ATC Based on CPLD

作　　者：蒋国峰 周刚[2] 徐东升[2] 

机构地区：[1]空军第一航空学院航空电子工程系 [2]中国人民解放军95965部队

出　　处：《计算机测量与控制》2015年第2期423-425,共3页Computer Measurement &Control

摘　　要：针对某型航管应答机串行控制接口电气特性、时序关系和数据定义的特殊要求,设计了以CPLD最小应用系统为核心,并扩展RS-232和三线控制接口电平转换的硬件电路,编制了基于计数器触发的输出接口信号状态转换程序,实现了RS-232接口与航管应答机三线串行控制接口信号的转换,较好地解决了航管应答机自动测试系统中控制接口电路的适配问题;该控制接口通过扩展输入和显示模块,可独立实现对航管应答机的功能控制和状态指示;通过改变计数器数值与输出接口信号状态转换之间的关系,可方便地调整三线串行接口信号的电平、时序、占空比等参数;应用结果表明,该控制接口具有性能稳定、使用方便、扩展性强等特点。The circuit is designed based on CPLD according to the special requirement of the interface for some ATC.The software of interface output is programmed based on counter.The conversion between RS-232 and TRI-SPI is realized,so the problem of interface adaption between the ATS for ATC and ATC is resolved.The control interface can control ATC and display information of ATC work state independently through explanding the input and display.The level and scheduling and dutycyde of interface are changed easily through changing the relationship between counter and interface signal.The control interface have the characteristic of stabilization、conveniency and expansibility.

关 键 词：航管应答机 三线串行接口 复杂可编程逻辑器件 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]