嵌入式LCD情报板网关系统设计与开发

Design and Development of Embedded LCD Bulletin Board Gateway System

摘要:

针对LED情报板显示规模小、控制难、信息无法实时发布的问题,进行了显示方式、控制方法和通信模式的分析,提出了一种嵌入式LCD情报板网关系统的设计方案;该系统由智能显示模组、网关、后台数据库和WEB界面四部分组成,智能显示模组包括LCD显示屏、触摸屏、S3C2440嵌入式微处理器、人机界面处理系统和RS232通讯接口；网关是以嵌入式Linux操作系统OpenWrt和嵌入式微处理器RT5350为平台,实现了802.11 b/g/n高速无线局域网、以太网WAN和RS232串口通信相互转换的功能；后台数据库是以html和php语言为软件支撑,管理员可以通过WEB界面灵活的管理情报板内容和配置网关参数;在校园搭建情报板网关系统并进行测试,结果表明,该系统能够将底层服务与上层管理紧密结合,扩大信息覆盖面,提高信息利用率和发布效率,在信息发布技术的发展上有一定的参考、推广价值。

Abstract:

The embedded LCD bulletin board gateway system is designed after the analysis of the display mode, control method and communication mode to solve the problems of small size, difficulty in control and postponement of information occurring to LED bulletin board. This system is comprised of four parts namely smart display module, gateway, background data base and WEB interface. The smart display module includes LCD display screen, touch screen, S3C2440 embedded microprocessor, human-computer interface processing system and RS232 connector. Gateway can realize the function of conversion between 802.11b/g/n high-speed wireless LAN, Ethernet WAN and RS serial port communication based on the embedded Linux operating system OpenWrt and embedded microprocessor RT5350. Background data base is established using html and php languages and the administrator can have an easier control on the bulletin board information and set the parameters of gateway. This bulletin board gateway system has been established and tested at the XUPT campus. The test results indicate that it can construct a close relationship between service and top management, expand the coverage of information, improve information utility as well as the efficiency of information distribution, thus providing a reference for the development of information distribution technology and having values for promotion.