摘要随着计算机硬件和软件上技术的进步，通信行业的不断发展为我们所使用的设备极大地提高了性能，设备运行的效率得到了巨大的提升。另一方面，计算机和其它终端设备之间的通信速度要求越来越高，调制解调器处理信号的速度也越来越快。连接终端与调制解调器进行串并数据格式转换和信号控制的电路是串口通信接口电路。对于普通的串口通信电路，当由于缓存数据的容量较小，就会导致在高速的通信系统下，接口电路频繁向终端发送中断请求，这样就会降低终端设备处理器的工作效率，同时也降低整个通信系统的速度，不利于实现高速的通信。 

本论文所涉及的实验，改进了传统的串口通信电路缓存容量小的缺点。结合自动进样检测系统的开发实践，研究了一种基于Java串口通信的检测系统的设计和实现方法，并对系统的结构设计及系统实现中Java串口通信做了介绍。在计算机或终端设备与接口电路之间加入FIFO(先入先出)存储器，用来缓存要存储的数据。由于基于Java的逻辑器件设计的电路具有低功耗，高性能，设计方便，可扩展，可重复等优点，本实验对整个电路的设计都采用Java可编程的方式。分别基于Java设计异步高速FIFO存储器，串口通信接收与发送电路的各个模块。再对整个电路进行综合与仿真，得到了较为理想的结果。87942

毕业论文关键词：Java；串口通信设计；存储器；接口

Abstract With the continuous development and integration of computer technology and communication technology on the one hand, the performance of the computer and other terminal equipment increasing, the speed of data processing is increasing; on the other hand, requires the communication speed between computers and other terminal equipment is more and more high, modem signal processing speed is also faster。 The circuit of the connection terminal and the modem for data format conversion and signal control is a serial communication interface circuit。 For the common serial communication circuit, when the cache capacity is small, it will result in high speed communication system, interface circuit frequently sends the interrupt request, this will reduce the terminal processor work efficiency, but also reduce the speed of the whole communication system, is not conducive to the realization of high speed communication。

The experiments involved in this paper have improved the shortcomings of the small capacity of the traditional serial communication circuit。 Combined with the development practice of automatic sampling detection system, a design and implementation method of detection system based on Java serial communication is studied, and the structure design and Java serial port communication of the system are introduced。 FIFO (first in first out) memory is added between the computer or the terminal device and the interface circuit to cache the data to be stored。 Because of the advantages of low power, high performance, convenient design, expansibility and repeatability, the circuit designed by logic device based on Java is designed in Java programmable way。 The asynchronous high-speed FIFO memory is designed based on Java, and each module of the serial communication receives and sends the circuit。 Then the whole circuit is integrated and simulated, and the ideal results are obtained。源-于,优Y尔O论U文.网wwW.youeRw.com 原文+QQ75201,8766

Key words: Java; serial communication design; memory; interface

目录

1  绪论 1

2  主要相关技术和理论 4

2。1 串口通信技术 4

2。1。1基本原理 4

2。1。2结构特点