测试台中自制数字式定时器的实现与应用  

Realization and application of the self digital timer instrument in test bench system

作　　者：李桂新[1] 蒋敏玉[1] 

机构地区：[1]南京电子技术研究所,江苏南京210039

出　　处：《微型机与应用》2014年第21期32-34,38,共4页Microcomputer & Its Applications

摘　　要：首先阐述了数字式定时器在回旋管测试台系统中的组成框图及其重要性。研究并利用数字处理器的外部总线接口实现了对可编程器件的连接控制,并重点叙述了总线的读写时序关系和有关接口模块的实现代码。在系统设计中考虑了过脉宽和过占空比现象对设备的影响并给出了有效解决方案。借助人机界面设备可以很方便地实现对定时器的输出脉冲宽度和重复频率的设置,同时还解决了参数记忆保存的问题。基于数据总线实现了对嵌入式芯片的控制,该方式对普通自制式仪表设计具有借鉴意义。This paper firstly introduces the system composition of the self digital timer in the gyrotron test bench system and the equipment importance. Research and using digital signal process＇ external bus interface connect with the complex programmable logic device. The bus read-write timing diagram include the interface program code is described emphatically. In this system design, the fault protection of over pulse width and over pulse duty is covered with solution. It is easy to set and store the pulse timer＇s pulse width and frequency value. The application results of controlling embedded chip based on bus show the reference to similar self instrument design.

关 键 词：数字式定时器 过脉宽/占空比保护 总线接口 人机界面 

分 类 号：TP216.1[自动化与计算机技术—检测技术与自动化装置]