基于ARM和CPLD的LED显示屏设计与实现

发布时间：2018-01-19 16:14

本文关键词： ARM处理器 CPLD LED显示系统 USB 文件系统　出处：《南京航空航天大学》2009年硕士论文　论文类型：学位论文

【摘要】： 随着信息时代高新技术的飞速发展,人们对及时获取并显示各类信息的愿望日益强烈,由此带动了信息传媒的飞速发展,LED显示屏就是信息显示的重要传媒之一。LED显示屏是利用发光二极管点阵模块或像素单元组成的大面积显示屏幕,广泛应用于金融市场、医院、体育场馆、机场、码头、车站、高速公路等公共场所的信息显示和广告宣传。本课题采用基于ARM核的新一代32位嵌入式RISC微处理器组成前级驱动电路,结合CPLD作为协处理器,PC机用于后级管理和控制,并成功地将USB通信加入硬件平台中,成为本课题重要特色部分,为LED显示屏未来的发展提供了良好的前景。本文主要完成以下工作: (1)深入了解大屏幕LED显示系统的结构和工作原理,分析传统LED显示控制器系统的主要不足,提出了本文关于LED显示系统设计的总体方案。 (2)设计完成了基于ARM和CPLD的大屏幕LED显示系统的总体设计平台,分析了芯片的结构和使用方法,完成了该系统的原理图和PCB电路板的设计,实现了硬件电路板的制作与调试。 (3)重点研究了USB大容量存储设备类规范和FAT32文件系统,分析了USB1.1协议,成功开发了主控制器驱动程序和USB核心驱动程序,使得基于USB通讯的大屏幕LED显示系统具有更好的实际应用价值。 (4)开发了基于ARM硬件平台的大屏幕LED显示系统的应用软件,主要包括通信模块、控制模块、显示模块以实现LED显示屏的图文显示,其中基于ARM微处理器控制系统的程序采用ARM汇编语言和C语言编写,在PC机上使用C++Builder开发环境进行了串口通信程序的设计,并通过PCOMM组件来实现数据传输。
[Abstract]:With the rapid development of high and new technology in the information age, people's desire to obtain and display all kinds of information in time is increasingly strong, which has led to the rapid development of information media. LED display screen is one of the important media of information display. Led display screen is a large area display screen composed of light-emitting diode lattice module or pixel unit, which is widely used in financial market and hospital. Information display and advertising in public places such as stadiums, airports, docks, stations, highways, etc. In this paper, a new generation of 32-bit embedded RISC microprocessor based on ARM core is used to make up the front-stage driving circuit, and CPLD is used as the coprocessor for the management and control of the back stage. USB communication has been successfully added to the hardware platform, which has become an important feature part of this topic, which provides a good prospect for the future development of LED display screen. The main work of this paper is as follows: 1) deeply understand the structure and working principle of the large-screen LED display system, analyze the main shortcomings of the traditional LED display controller system, and put forward the overall scheme of the design of the LED display system in this paper. The overall design platform of the large screen LED display system based on ARM and CPLD is designed. The structure and usage of the chip are analyzed. The schematic diagram of the system and the design of the PCB circuit board are completed, and the hardware circuit board is made and debugged. In this paper, the class specification of USB mass storage device and FAT32 file system are studied, the USB1.1 protocol is analyzed, and the main controller driver and USB core driver are developed successfully. The large screen LED display system based on USB communication has better practical application value. The application software of large screen LED display system based on ARM hardware platform is developed, which mainly includes communication module, control module and display module to realize the graphic and text display of LED display screen. The program based on ARM microprocessor control system is written in ARM assembly language and C language, and the serial communication program is designed by using C Builder development environment on PC. And through the PCOMM component to achieve data transmission.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2009
【分类号】：TN873

【引证文献】