五功能智能逻辑笔的设计摘要：逻辑笔在数字电路检测中使用是最广泛的，它不仅新颖方便，而且操作起来方便简单。作为一种便携式电路检测工具，可以通过不同颜色的 LED 灯来直接显示出电平的状态。本课题是基于 FPGA 设计的一款五功能智能逻辑笔，精确检测 5V 和 3.3V 两个逻辑电平，并且还可以检测脉冲信号和高阻态。本课题采用状态机去设计，LM393 双向比较器去构成了一个电平信号采样电路，系统主要由被测信号、逻辑电平测量电路、双向比较器 LM393、FPGA 的状态机、LED 显示组成。最终的结果是通过 LED 灯显示反馈给用户。关键词：逻辑笔；FPGA；状态机 1Design of Five-Function Intelligent Logic PenWen YalinSchool of Electronic Information Engineering, Major in Electronic Information Science and Technology, 2016 Instructor: Zhang JianniAbstract: Logic pen is the most widely used for digital circuit detection . It is not only novel and convenient , but also convenient and simple to operate . As a portable circuit detection tool , the status of the level can be directly displayed by LED lights of different colors . This subject is a five-function intelligent logic pen designed based on FPGA , which can accurately detects two logic levels of 5V and 3.3V , and can also detect pulse signals and high-impedance states . This subject is designed with a state machine . The LM393 bidirectional comparator constitutes a level signal sampling circuit . The system consists of the signal under test , a logic level measurement circuit , a bidirectional comparator LM393 , a state machine for FPGA , and an LED display . The end result is the feedback to the user through the LED light display.Keywords：Logic Pen; FPGA; State Machine2目 录摘要................................................................................................................................1Abstract................................................................
