RFID基于USB的无线接入终端设计与实现
摘要随着射频技术、集成电路技术的发展,无线通信功能的实现越来越容易,数据传输速度也越来越快。尤其是一些机动性要求较强的设备,或人们不方便随时到达现场的情况下,无线通信技术的优点就显得越发突出。RFID是目前使用广泛的一种无线通信，可通过无线电讯号识别特定目标并读写相关数据，而无需识别系统与特定目标之间建立机械或光学接触。为了实现RFID通信本文完成了基于USB的无线接入终端设计与实现，实现无线数据的收发。具体的无线信号的收发由无线收发芯片SI4432完成。系统采用P89LPC970微控制器，以高速串行通信接口SPI和SI4432进行通信，以增强型UART和PC进行通信。由于目前使用的PC大多只有USB接口而没有串口，所以本文在设计时还完成了USB向RS232接口的转换。65316
毕业论文关键词 无线通信 RFID USB
毕业设计说明书（论文）外文摘要
Title the design and implementation of the wireless access terminal based on USB
Abstract
With the development of Radio Frequency Identification and IC technology ,the realization of wireless communication become more and more easy,data transmission speed is also become faster and faster.Especially some mobility requires strict equipment, or people without convenient at any time on the scene, the advantages of wireless communication technology becomes increasingly prominent.RFID is one of the currently widely used wireless communication, which can identify specific targets, read and write related data through the radio signal,Without mechanical or optical contact between recognition system and specific objectives.In order to implement RFID communication,this paper complete the design and implementation of the wireless access terminal based on USB ,implement the transceiver of wireless data. Use the wireless transceiver chip SI4432 to send and receive wireless signal.The system uses P89LPC970 microcontrollers,implemented the communication to PC through the RS232 communication interface , implemented the communication to SI4432 through the high speed communication interface SPI.Due to most currently used PC use USB interface without a serial port, so this article also completed the USB to RS232 interface transition.
Keywords radio communication RFID USB
目 次
1 引言 1
1．1 选题背景与意义 1
1.2.1 RFID研究现状 2
1.2.2 USB研究现状 3
2 系统方案设计 4
3 硬件设计 4
3.1 无线收发芯片SI4432 5
3.1.1 数据传送 6
3.1.2 收发控制 7
3.2 微控制器P89LPC970 7
3.2.1 UART 8
3.2.2 SPI 8
3.2.3 内部存储 9
3.3 USB向RS232的转换 9
3.3.1 转换背景 9