本文關(guān)鍵詞： LED顯示屏 ARM STM32 數(shù)據(jù)組織 算法　出處：《西南交通大學》2012年碩士論文　論文類型：學位論文

【摘要】：LED顯示屏作為新一代信息傳播媒體工具,主要是因為它具有以下幾個優(yōu)點：使用壽命長、功耗較低、亮度比較高、可視角度大、可視距離遠等。如今LED顯示屏應(yīng)用十分廣泛,比如證券交易、金融、車站、體育場館、道路交通、機場航班、調(diào)度指揮中心、商場、廣告媒體、郵政、演出、展覽會等各種公共場所。與如今LCD相比,LED顯示屏具有低成本、高亮度且可以用標準單元板拼接成現(xiàn)場需要的LED屏幕尺寸。隨著科技的發(fā)展,LED材料技術(shù)和工藝手段也在逐步提升,憑借其突出的優(yōu)勢,LED顯示屏成為信息顯示的主流產(chǎn)品之一。本文主要討論基于ARM的LED顯示屏系統(tǒng)的設(shè)計及顯示效果算法的研究。 在LED顯示屏系統(tǒng)設(shè)計中,控制卡設(shè)計是整個系統(tǒng)技術(shù)的核心。傳統(tǒng)的LED顯示屏都是基于高性能8/16位單片機,采用的是8051內(nèi)核,系統(tǒng)主頻較低,對數(shù)據(jù)存儲和處理是通過擴展外部flash,不適合大屏幕的設(shè)計；采用ARM/FPGA作為微處理器時,雖然克服了單片機的缺點,但是成本也是明顯提高�；诖�,在分析前人研究的基礎(chǔ)上,本課題基于ARM Cortex-M3內(nèi)核的STM32芯片作為LED顯示屏的微處理器,既克服了單片機的性能缺陷和ARM/FPGA芯片高成本,同時又滿足LED顯示屏的性能要求。論文主要內(nèi)容如下： 1、深入分析LED顯示屏工作原理及整體架構(gòu),給出基于STM32的LED顯示屏系統(tǒng)的設(shè)計方案,完成了系統(tǒng)原理圖和PCB板的設(shè)計、電路板的制作與調(diào)試等。 2、通過對雙色LED顯示屏的數(shù)據(jù)進行組織,得出了數(shù)據(jù)和存儲地址之間的對應(yīng)關(guān)系,數(shù)據(jù)組織原理同樣也適用LED大屏幕,因為通過LED顯示屏單元板可以拼接LED大屏幕。 3、通過對LED顯示屏的數(shù)據(jù)組織的分析,得出一套比較通用的顯示效果的算法,為后續(xù)更深入研究LED顯示屏或者是想研究LED顯示屏的人員提供參考。 4、通過分析LED顯示屏對ASCII碼和漢字的顯示原理,設(shè)計一種算法,可以一次性輸出ASCⅡ碼中的所有字符和漢字字庫中的所有內(nèi)容,并以數(shù)組的形式保存,方便程序修改和調(diào)用,為LED顯示屏在字符和漢字顯示方面提供參考。 由于本設(shè)計采用高性能、低價位、低功耗的STM32作為微處理器,使得LED顯示屏系統(tǒng)具有相當好的應(yīng)用前景。經(jīng)過安裝測試后,系統(tǒng)的各項指標均達到了設(shè)計要求,整個設(shè)計已經(jīng)在西南交通大學峨眉校區(qū)得到實踐并運用。
[Abstract]:As a new generation of information dissemination media tool, LED display screen is mainly because it has the following advantages: long service life, low power consumption, high brightness, large visual angle, long visual distance, etc. Nowadays, LED display screen is widely used. For example, securities trading, finance, stations, stadiums, road traffic, airport flights, dispatch and command centers, shopping malls, advertising media, postal services, performances, exhibitions and other public places. High brightness and can be spliced with standard unit board to form the screen size needed in the field. With the development of science and technology, the technology and technology of LED materials are also gradually improving. Led display screen has become one of the mainstream products of information display by virtue of its outstanding advantage. This paper mainly discusses the design of LED display screen system based on ARM and the research of display effect algorithm. In the design of LED display screen system, the design of control card is the core of the whole system technology. The traditional LED display screen is based on the high performance 8/16 bit single chip microcomputer and adopts the 8051 core, so the main frequency of the system is low. Data storage and processing is not suitable for the design of large screen by extending external flash. When ARM/FPGA is used as microprocessor, although it overcomes the shortcomings of single chip computer, the cost is also obviously increased. Based on this, based on the analysis of previous studies, The STM32 chip based on the ARM Cortex-M3 core is used as the microprocessor of the LED display screen. It not only overcomes the performance defects of the MCU and the high cost of the ARM/FPGA chip, but also meets the performance requirements of the LED display screen. The main contents of this paper are as follows:. 1. The working principle and the whole structure of LED display screen are deeply analyzed, and the design scheme of LED display screen system based on STM32 is given. The design of system schematic diagram and PCB board, the manufacture and debugging of circuit board are completed. 2. By organizing the data of the two-color LED display screen, the corresponding relation between the data and the storage address is obtained. The principle of data organization is also applicable to the large LED screen, because the large LED screen can be spliced through the unit board of the LED display screen. 3. Through the analysis of the data organization of LED display screen, a set of general display effect algorithm is obtained, which provides a reference for the further study of LED display screen or for those who want to study LED display screen. 4. By analyzing the display principle of ASCII code and Chinese character on LED display screen, an algorithm is designed, which can output all characters in ASC 鈪，

本文編號：1530090