【作者】 丁弋宇；

【导师】 史小军；

【作者基本信息】 东南大学 ， 电路与系统， 2006， 硕士

【摘要】 自90年代以来,LED显示屏的设计制造和应用水平的到日益提高,LED显示屏经历了从单色、双色图文屏到图像显示屏,一直到到今天的全彩色视频显示屏的发展过程。在此发展过程中,无论在器件性能(超高亮度LED显示屏及蓝色发光二极管等)和系统组成(计算机化的全动态显示系统)等方面都取得了长足的进步。LED显示屏和其它平板显示器相比,有其独特的优越性,比如:可靠性高、使用寿命长、环境适应能力强、性价比高且成本低等特点,且随着全彩屏显示技术的日益完善,使得LED显示屏在许多场合得到广泛应用。本文主要研究对象为LED显示屏异步控制系统。论文首先分析了当今市场上销售的LED异步显示屏控制系统存在的一些问题,然后提出了利用ARM9处理器AT91RM9200和物理层芯片DM9161E为核心的新数据传输方案。详细介绍了该嵌入式系统的硬件设计,以及设计中要注意的问题。接着阐述了基于嵌入式LINUX操作系统的软件设计,从最低层的引导程序、LINUX系统移植、网络驱动程序设计到上层的采用BSD套接字的UDP、TCP应用程序设计。同时给出另外一套基于实时操作系统uC/OS-II和可裁减的协议栈uC/TCP-IP的软件方案。最后介绍了以IPv6、高速以太网、光纤通信为典型的网络技术的未来的发展方向。更多还原

【Abstract】 LED panel system gain rapid development in the design, manufacture and application from nineties ages. It went through from single color and two color to image LED panel. Now true color panel has come true. During the development course, it obtains quite great progress in parts capability(super high bright LED panel and blue LED) and systemn form(computerized all dynamic display system).Compared with other flat display, LED panel has many special feature such as high reliability, long age, high performance, low cost, and more important high acclimatization. Moreover with the technique of all color panel perfected increased, LED panel is widely used in many place.The paper’s research object is LED panel asynchronous control system. Firstly, the thesis analyze the existing problems via the sale of LED panel asynchronous control system in the market. Then giving out the new solution of data transmission using ARM9 processor AT91RM9200 and DM9161E as system core. Particularly introducing the hardware design of embedded system and the problem which must be concerned. Following paragraph talk about the software design based on embedded Linux, from Bootloader, porting system, network device design to application about UDP and TCP transmission via BSD socket programming. By the same time, the thesis gives out another software solution based on RTOS uC/OS-II and uC/TCP-IP. The last paragraph introduces the development of network for example IPv6, ultra speed Ethernet and also fiber communication.更多还原