基于ARM7的GPRS无线上网研究  

GPRS wireless internet based on ARM 7

作　　者：李安伏[1] 姬秀荔[1] 张继军[1] 

机构地区：[1]安阳工学院电气工程系,河南安阳455000

出　　处：《电力自动化设备》2007年第2期59-61,共3页Electric Power Automation Equipment

摘　　要：提出以先进的精简指令(RISC)的ARM7 PC2104微控制器为核心,通用无线分组业务(GPRS)模块MC 35i组成无线上网系统。MC 35i模块可实现系统方案中的数据、语言传输,短消息服务和传真功能,可工作在900、1800 MHz 2个频段,支持文本及专业发展单元(PDU)模式的短消息,以RS-232接口与PC2104连接通信。论述了系统软件移植μC/OS-Ⅱ嵌入式操作系统,其改写的TCP/IP协议栈μC/IP协议栈设计为带最小化用户接口及可应用串行链路网络模块。GPRS网络结构中的物理层由GPRS协议构成,数据链路层采用点对点协议(PPP),应用层使用TCP/UDP提供的套接字函数调用实现客户与服务器之间的TCP连接或UDP数据报,给出了软件流程图,说明了嵌入式通信系统是远程控制和嵌入式系统通信的重要手段。Combined with GPRS（General Packet Radio Service） MC35i module,the advanced RISC （Reduced Instruction Set Computer）ARM7 PC 2104 is used as the core to form a wireless internet system. With functions of data and sound transmission,short message service and fax,working in frequency bands of 900 Hz and 1 800 Hz,MC35i module supports short message in text and PDU （Professional Development Units） modes and communicates with PC 2104 via RS-232 interface. μC/OS-Ⅱ embedded operating system is transplanted in system software,and μC/IP,the rewritten TCP/IP protocol stack,is designed with minimum user interface and applicable serial link network module. In GPRS network,the physical layer applies GPRS protocol,the link layer adopts point-to -point protocol,the application layer uses Socket function call of TCP/UDP to realize UDP data message or TCP connection between client and server. The software flowchart is offered,which shows the embedded communication system is an important means for communication between remote control and embedding system.

关 键 词：无线上网 协议栈 GPRS 

分 类 号：TN925.93[电子电信—通信与信息系统] TP393[电子电信—信息与通信工程]