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摘要无线数据传输系统广泛应用于安防监控、设备检测、环境监测等领域，与有线传输系统相比，无线系统建设和维护成本低，通信距离远，易于扩展，网络的实时性和可靠性比较高，因此研究无线传输系统具有非常重要的应用价值。64575
本文介绍了国内外无线数据传输系统研究现状，在熟悉ARM微处理器、嵌入式实时操作系统和GPRS等技术原理的基础上，采用基于ARM和GPRS的无线数据传输方案。
在硬件电路设计中，选用ARM9微处理器S3C2440A作为主控制器，扩展FLASH和SDRAM存放用户程序和数据信息、选用内嵌TCP/IP协议栈的GPRS模块MC35I作为数据发送模块。论文给出了电源、复位、JTAG口、SDRAM、NAND Flsah和GPRS模块电原理图。
在软件设计中，将Linux实时操作系统移植到S3C2440A，系统工作时首先初始化硬件与操作系统，然后启动采集程序，并将采集到的数据保存至Nand Flash，系统在发送数据时先检测网络是否畅通，如果网络畅通则从Nand flash中取出数据并通过GPRS模块MC35I将数据传输至远程控制计算机。论文研究了Linux系统的移植，编写了232串行口通信程序，MC35I的初始化程序，给出了数据通信的详细流程图。
毕业论文关键词： 无线传输，微处理器，通用无线分组业务，Linux
毕业设计说明书（论文）外文摘要
Design of Wireless Data Transmission System Based on ARM and GPRS
Abstract
Wireless data transmission system is widely used in security-monitoring,equipment-monitoring,environment-monitoring and so on.Compared with cable transmission system, the construction and maintenance of wireless system is lower-cost,the distance os communication is farther and the expansion of terminal is easier.Meanwhile the system is real-time and reliability of the neiwork is high.So the research of wireless data transmission system has very important practical significance.
The current domestic and international status quo of wireless data transmission system were researched in this paper.On the basis of a familiar ARM microprocessors, embedded real-time operating system and GPRS technology.So we proposed a wireless data transmission system based on ARM and GPRS.
In the design of the hardware circuit, the ARM9 microprocessor S3C2440A was selected as the main controller and the FLASH and SDRAM were expanded to store programs and data respectively. The GPRS module MC35I embedded TCP/IP protocol stack was used as data-sending module,The microprocessor operated the TCP/IP protocol to connect to Internet. The paper gives a power, reset, JTAG port, SDRAM, NAND Flsah and GPRS module electrical schematics.
In the design of software, the Linux system were transplanted to S3C2440A.When the system starts to work,it initialize the hardware and operating system firstly, and then starts the collection process and saves the data to the Flash. The system detects the connection of the GPRS network before sending date. If the network is smooth, the system will load the data from the Flash and send it to the remote control computer through the GPRS module MC35I.The paper study the Linux system migration, prepared 232 serial port communication program, MC35I initialization procedure, gives a detailed flowchart of data communication.
Key wards: wireless data transmission, microprocessor ，GPRS,linux
目 次
1 绪论 1
1．1 课题背景 1
1.1.1 ARM公司技术特点及GPRS技术概述 1
1.2 国内外研究现状 3
1.2.1无线数据传输方式研究现状 3
1.2.2 数据传输模块研究现状
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