基于ARM的LED视频控制系统设计

发布时间：2018-06-07 20:39

本文选题：ARM + LED视频　；参考：《武汉理工大学》2008年硕士论文

【摘要】： 近年来,LED显示系统在信息显示领域得到了广泛的应用,迅速发展成一种电子广告媒体,而且已形成具有相当发展潜力的电子产业。随着北京申办年奥运会的成功,必将进一步推动LED显示屏产业的发展。就目前的发展趋势来看,LED视频显示系统是一个发展趋势。而目前的LED视频系统必须以PC机为视频源,一对一的联机、同步显示,属于同步显示系统,使用不是很灵活方便。一般用于大型购物广场的户外播放视频广告、电视和电影,还可用于大型体育比赛场所,实时直播赛况。尽管异步显示系统可脱机使用,方便灵活,但不能够播放视频信息。从商业角度来说,技术先进的不一定就是能在市场上完全能行的通的。随着电子广告市场发展,城市街道的视频广告也必将是一种发展趋势,因为具有动感的彩色视频广告比普通的广告壁纸更能吸引人们眼球,同时也为城市添加一道靓丽的风景。而具有寿命长、成本低、亮度高、视角大、可视距离远等特点的LED显示系统比较适合此场所的显示要求。针对这一特点,开发一套小型、可脱机播放视频的LED显示系统,具有重要的意义和市场价值,不仅有助于城市电子广告产业的发展,也必将推进小型LED视频系统的研究进程以及在其他领域的广泛应用。因此,本课题以此作为研究工作的起点。本文在分析LED显示屏工作原理后,针对目前LED异步显示系统存在的缺点,结合LED同步显示系统的主要功能及技术指标,提出解决关键问题的总体技术方案。该系统采用ARM+FPGA的硬件构架,利用ARM处理器可移植操作系统、自带LCD控制器、可实现图形界面系统的特点,将ARM系统作为视频源,FPGA用于显示数据重构、灰度扫描控制的电路设计,有效解决了该系统的关键技术问题。本文的核心是ARM系统软硬件设计及FPGA逻辑设计两大部分。首先根据系统的总体设计方案实现控制系统硬件平台的设计;然后在此基础上通过对嵌入式Linux内核的移植、LCD驱动程序的开发及Qtopia图形界面系统的实现,完成了ARM系统的软件平台设计;最后重点介绍了FPGA的逻辑设计及仿真分析,并验证了各模块的功能设计的正确性。
[Abstract]:In recent years, LED display system has been widely used in the field of information display, and has developed rapidly into an electronic advertising media, and has formed an electronic industry with considerable development potential. With the success of Beijing's bid for the Olympic Games, the LED display industry will be further promoted. According to the current development trend, LED video display system is a development trend. The current LED video system must be PC as the video source, one to one online, synchronous display, belong to the synchronous display system, the use is not very flexible and convenient. Generally used for outdoor video advertising, television and movies in large shopping malls, but also for large-scale sports venues, real-time live broadcast of the game. Although the asynchronous display system can be used offline, it is convenient and flexible, but it can not play video information. From the commercial point of view, the advanced technology is not necessarily able to be fully operational in the market. With the development of electronic advertising market, video advertising in city streets is bound to be a development trend, because color video advertisements with dynamic sense can attract people's attention more than ordinary advertising wallpaper, and add a beautiful scenery to the city at the same time. The LED display system with the characteristics of long life, low cost, high brightness, large angle of view and long visual distance is more suitable for the display requirements of this place. In view of this characteristic, the development of a small LED display system that can play video offline is of great significance and market value, which is not only helpful to the development of urban electronic advertising industry. It will also promote the research process of small LED video system and its wide application in other fields. Therefore, this paper takes this as the starting point of the research work. This paper analyzes the working principle of LED display screen, aiming at the shortcomings of current LED asynchronous display system, combined with the main functions and technical specifications of LED synchronous display system, puts forward the overall technical scheme to solve the key problems. The system adopts the hardware frame of arm FPGA, the portable operating system of arm processor, and the LCD controller, which can realize the characteristics of graphical interface system. The arm system is used as the video source FPGA to reconstruct the display data. The circuit design of gray-scale scanning control effectively solves the key technical problems of the system. The core of this paper is the hardware and software design of arm system and the FPGA logic design. Firstly, the hardware platform of the control system is designed according to the overall design scheme of the system, and then, through the development of the embedded Linux kernel transplant LCD driver and the realization of the Qtopia graphical interface system, Finally, the logic design and simulation analysis of FPGA are introduced, and the correctness of the functional design of each module is verified.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2008
【分类号】：TP273

【引证文献】