文档介绍：摘要
随着社会的发展和进步,电子标签作为一种数据载体,在现代的超市、图书馆、仓储等公共流通部门应用越来越广泛,销码器作为识别电子标签的设备,自然也就应运而生,因此研究设计一个新型的电子标签销码器有着重要的现实意义和应用价值。
电子标签销码器的设计采用89c2051单片机、NE564等芯片,运用了智能控制、频率合成、高频小信号检测等技术。在掌握了系统的硬件基础,掌握了射频识别技术,研究了AT89C2051单片机的工作原理和指令系统的基础上,进行了软件设计,整个系统以Keil uVision2为开发平台,设计了程序流程,采用了汇编语言编写程序代码,软件设计中主要应用单片机的中断和定时功能,利用P3端口的第二功能,来控制功率、发射、检测以及蜂鸣等,实现软件和硬件的结合,从而完成销码器的设计。
论文首先介绍单片机的基本知识,阐述了设计的基本原理,接着介绍了硬件实现,然后论述了系统的软件设计,介绍了开发工具,进行了各功能模块的设计,给出了程序流程图,编写了程序代码,最后对设计进行了总结。
关键词:单片机,销码器,射频识别,锁相技术
ABSTRACT
With the social development and progress, the electronic tag as a kind of data carrier, is widespread in the modern supermarket,library,warehousing and other public circulation departments, pin code as an equipment to identify the electronic tag, also arises at the historic moment naturally, in view of this demand,design pin code has vital practical significance.
The design uses 89c2051 MCU, NE564 and other chips, using intelligent control, frequency synthesis, high-frequency signal detection techonology to develope the pin code. On the basis of system's hardware, mastered the radio frequency identification technology, studied AT89C2051 SCM’s principles and instruction system,after that designed the software. The whole system take Keil uVision2 as the develop platform, flow chart is designed and programming is based on the assembly language. In the software aspect,design mainly used MCU's interrupt and timing function, uses the P3 port's second function to control the power,launch,testing as well as the buzzing,at last achieve the union of hardware and software,pletes the pin code’s design.
Papers first introduced the basic knowledge of MCU,expounded the basic principle of the design,then introduced the hardware implemetation,after that introduced the development tool,each functional module is designed and flow chart is presented,of course code is given,finally gives a summary of the design.
.
Keywords:MCU, Radio Frequency Identification, Lock-in technology,pin code
目录
第1章绪论 1