單片機(jī)LED滾動(dòng)顯示的畢業(yè)論文


摘   要
LED顯示屏是一種通過(guò)控制半導(dǎo)體發(fā)光的顯示方式，它是由很多個(gè)紅色的發(fā)光二極管組成，靠燈的亮滅來(lái)顯示字符。LED顯示屏分為數(shù)碼顯示屏、圖文顯示屏和視頻顯示頻。均由LED矩陣塊組成。目前由于LED顯示屏造價(jià)昂貴，主要應(yīng)用于比較較高檔的場(chǎng)所，主要集中在城市的繁華場(chǎng)所。在舉辦的2010年上海世博會(huì)’未來(lái)各項(xiàng)大項(xiàng)運(yùn)動(dòng)賽事等新增需求，都將促使LED顯示屏的大規(guī)模發(fā)展。此外，已架設(shè)的大型LED顯示屏幕梅10年將歷經(jīng)一次換機(jī)潮，隨著人們生活水平的提高，戶外LED顯示屏將逐漸應(yīng)用于各個(gè)行業(yè)。
本設(shè)計(jì)主要實(shí)現(xiàn)16*16LED顯示屏對(duì)文字及簡(jiǎn)單圖像的顯示，擴(kuò)展功能有實(shí)時(shí)鐘及實(shí)時(shí)溫度采集，并通過(guò)LCD1602及LED點(diǎn)陣屏靜態(tài)及滾動(dòng)顯示。設(shè)計(jì)分為三大步，分別是軟件設(shè)計(jì)，硬件仿真及實(shí)物制作，兼顧理論性及實(shí)用性，充分體現(xiàn)了理論與實(shí)踐相結(jié)合，設(shè)計(jì)過(guò)程中不僅學(xué)到了很多有用的知識(shí)，也增長(zhǎng)了自己的專業(yè)技能，提高了自己的動(dòng)手能力。

關(guān)鍵字： LED  顯示屏  發(fā)光二極管  半導(dǎo)體

Abstract

LED display is the display mode controlling by the semiconductor light emitting diode, it probably looks like that composition by a number of led is usually a red light-emitting diodes which show character by the LED on and off , LED display is divided into Digital display, Graphic display and Video display, which is compositioned by LED matrix block, As the cost of LED display expensive currently, mainly used in relatively high places, concentrated in the cities busting place, being held in the Shanghai Word Expo 2010, Future large-scale sporting events and other additional requirements will promote large-scale development of LED display, In addition, the original large-scale LED display screen will be updating once per 10 years, with the improvement of people's living standard, outdoor LED display will gradually be used in various industries.
The main achievement of this design is 16*16 LED display show the text and simple image, the extension function include real-time clock and real-time temperature measurement which is displayed by LCD1602 and LED dot matrix display screen. This design is divided into three big steps, which is software design, hardware simulation and in-kind production, fully reflects the combination of theory and practice. From this design process, I'm not only learned a lot of  useful knowledge, also increase my professional skill sand Improve my practical ability.

Keywords :  LED  Display  Semicondutor   

目 錄
1  緒論 3
1.1  課題背景及意義 5
1.2  本課題相關(guān)介紹………………………………………………7
1.3  論文章節(jié)安排 7
2  系統(tǒng)的硬件部分設(shè)計(jì) 8
2.1  設(shè)計(jì)要求 8
2.2  設(shè)計(jì)基本方案 8
2.3  硬件電路芯片介紹 8
2.3.1  單片微型計(jì)算機(jī)簡(jiǎn)介 8
2.3.2  系統(tǒng)芯片的選擇 9
2.3.3  主控制單片機(jī) 9
2.3.4  80C51接口說(shuō)明 10
2.４  LED點(diǎn)陣制作 12
2.4.1  顯示模塊的選擇 12
2.4.2  LED驅(qū)動(dòng)模塊的選擇 12
2.4.3  主要芯片74LS138的介紹 12
2.5  16*16 LED點(diǎn)陣顯示制作 14
2.5.1  16*16 LED點(diǎn)陣的內(nèi)部結(jié)構(gòu)及工作原理 14
2.6  硬件系統(tǒng)的整體設(shè)計(jì)圖與原理分析 16
2.7  小結(jié) 18
3  系統(tǒng)的軟件部分設(shè)計(jì) 19
3.1  程序設(shè)計(jì)思路與結(jié)構(gòu) 19
3.1.1  程序設(shè)計(jì)思路 19
3.1.2  程序設(shè)計(jì)流程圖 19
3.2  模塊程序設(shè)計(jì) 21
3.2.1  系統(tǒng)初始化 21
3.2.2  LED動(dòng)態(tài)顯示 21
3.2.3  漢字顯示程序設(shè)計(jì) 21
3.2.4  顯示設(shè)計(jì) 22
3.3  小結(jié) 23
4  系統(tǒng)仿真 24
4.1  仿真環(huán)境介紹 24
4.2  仿真過(guò)程與結(jié)果 24
4.2.1  繪制電路圖 24
4.2.2  HEX文件的生成 25
4.2.3  調(diào)試與結(jié)果 25
4.3  小結(jié) 27
結(jié)束語(yǔ) 28
致  謝 29
參 考 文 獻(xiàn) 30
附錄A  點(diǎn)陣電路整體硬件電路圖 31