基于ARM的LED显示屏的控制系统的设计与实现
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密 惠 保
摘 要
近年来 ，LED(light emiting diode，发光二极管)显示屏作为一种高科技产品日益引起人们的重视。它可以实时显示或循环播放文字、图形和图像信息，具有显示方式丰富、观赏性强、显示内容修改方便、亮度高、显示稳定且寿命长等多种优点，被广泛应用于商业广告、体育比赛、交通信息报导等诸多领域.LED显示屏的核心技术主要集中在控制器中。目前，大部分异步显示屏采用的是8位或16位的微控制器，由于受到微处理器的处理速度、体系架构、寻址范围、外围接口资源等诸多限制，已难以在要求显示较多像素、显示内容帧频较高、动态显示效果复杂的情况下得到良好的动态视觉效果。
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针对以上情况，本文研究开发了一种全新的，由32位高性能ARM微处理器组成的LED显示屏控制系统，就控制平台、硬件结构和软件开发实现给出了驱动部分和控制部分的详细分析与设计。
关键词：LED显示屏，控制系统，ARM，LPC2294芯片，串口通信，RS232接口
The LED display control system design and implementation based on ARM
[来源：http://www.think58.com]
Abstract
LED panel systems gains rapid development in the design,machine and application from nineties ages.It went thorugh from single color and two colors to image LED panel.As a high technology production,LED panel can realize real time and sequential displaying textuer,graghic and images. LED panel has many special feature such as high reliability, long life,high performance, low cost, and more important high acclimatization. Moreover, with the technique of color panel perfect increasingly,LED panel is widely used in many fields. The coer techniqe for a LED panel is mainly centralized on its contorller.At present,the majority of asynchronous display panel use the 8 or the 16 micro-controllers,because the processing speed, the system construction, the addressing scope, the periphery connection resources and so on many limits, in request demonstration many picture elements, the demonstration content frame frequency has been with dificulty high, in the dynamic demonstration efect complex situation, obtains the good dynamic visual efect.
In view of above situation,This paper redesign and developed one kind new display system.It is composed by 32 high performance ARM microprocessor.The control platform,hardware structuer and softwaer implementation of the LED panel controller are analyzed and designed
Key Words：LED panel systems，control system, ARM, LPC2294 micro-controllers, serial communication, RS232 serial interface
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