16×16點(diǎn)陣LED電子顯示屏的設(shè)計(jì)

電子機(jī)電論文編號(hào):JD174             論文字?jǐn)?shù):17653,頁數(shù):41

目錄

摘要 I
Abstract II
第一章  前言 1
第二章  系統(tǒng)整體設(shè)計(jì)方案 2
2．1  需要實(shí)現(xiàn)的功能 2
2．2  LED顯示特點(diǎn) 2
2．3  設(shè)計(jì)方案論證 3
2．3．1  顯示模式方案 3
2．3．2  數(shù)據(jù)傳輸方案 4
第三章  系統(tǒng)硬件部分設(shè)計(jì) 5
3．1  電源設(shè)計(jì) 5
3．2  單片機(jī)系統(tǒng)及外圍電路 6
3．2．1  單片機(jī)的選擇 6
3．2．2  AT89C51芯片介紹 6
3．2．3  單片機(jī)系統(tǒng)外圍電路 9
3．3  列驅(qū)動(dòng)電路 10
3．4  行驅(qū)動(dòng)電路 12
3．4．1  行驅(qū)動(dòng)芯片74HC154 介紹 12
3．4．2  行驅(qū)動(dòng)電路 13
3．5  LED顯示屏電路 15
第四章  系統(tǒng)軟件部分設(shè)計(jì) 17
4．1  系統(tǒng)主程序 17
4．2  顯示驅(qū)動(dòng)程序 18
第五章  調(diào)試及性能分析 20
5．1  軟件調(diào)試 20
5．2  硬件調(diào)試 20
5．3  性能分析 21
結(jié)束語 22
致謝 23
附錄一  系統(tǒng)綜合電路原理圖 24
附錄二  系統(tǒng)程序清單 25
主要參考文獻(xiàn) 32

摘要
本設(shè)計(jì)是一16×16點(diǎn)陣LED電子顯示屏的設(shè)計(jì)。
整機(jī)以美國ATMEL 公司生產(chǎn)的40腳單片機(jī)AT89C51為核心，介紹了以它為控制系統(tǒng)的LED點(diǎn)陣電子顯示屏的動(dòng)態(tài)設(shè)計(jì)和開發(fā)過程。通過該芯片控制一個(gè)行驅(qū)動(dòng)器 74HC154和兩個(gè)列驅(qū)動(dòng)器74HC595來驅(qū)動(dòng)顯示屏顯示。該電子顯示屏可以顯示各種文字或單色圖像，全屏能顯示1個(gè)漢字，采用4塊8×8點(diǎn)陣LED顯示模塊來組成16×16點(diǎn)陣顯示模式。顯示采用動(dòng)態(tài)顯示，使得圖形或文字能夠?qū)崿F(xiàn)靜止、移入移出等多種顯示方式。文中詳細(xì)介紹了LED點(diǎn)陣顯示的硬件設(shè)計(jì)思路、硬件電路各個(gè)部分的功能及原理、相應(yīng)軟件的程序設(shè)計(jì)，以及使用說明等。
單片機(jī)控制系統(tǒng)程序采用單片機(jī)匯編語言進(jìn)行編輯，通過編程控制各顯示點(diǎn)對(duì)應(yīng)LED陽極和陰極端的電平，就可以有效的控制各顯示點(diǎn)的亮滅。所顯示字符的點(diǎn)陣數(shù)據(jù)可以自行編寫（即直接點(diǎn)陣畫圖），也可從標(biāo)準(zhǔn)字庫中提取。
LED顯示以其組構(gòu)方式靈活、顯示穩(wěn)定、功耗低、壽命長、技術(shù)成熟、成本低廉等特點(diǎn)在車站、證券所、運(yùn)動(dòng)場館、交通干道及各種室內(nèi)/外顯示場合的信息發(fā)布，公益宣傳，環(huán)境參數(shù)實(shí)時(shí)，重大活動(dòng)倒計(jì)時(shí)等等得到廣泛的應(yīng)用。
經(jīng)實(shí)踐證明，該系統(tǒng)顯示誤差小，性能穩(wěn)定，結(jié)構(gòu)合理，擴(kuò)展能力強(qiáng)。

關(guān)鍵詞：AT89C51單片機(jī)； LED； 點(diǎn)陣顯示； 動(dòng)態(tài)顯示； 匯編語言。

Abstract
This design is a 16 ×16 lattice LED electron display monitor design.
The whole equipment is with the 40-pin AT89C51 MCU (Micro Controller Unit) produced by the American ATMEL company at the core, introduced take it as the control system LED lattice electron display monitor dynamic design and the development process. Controls good driver 74HC154 and two row driver 74HC595 through this chip actuates the display monitor demonstration. The electronic screen can show all kinds of written or monochrome images, one full screen display Chinese characters, four pieces of 8×8 dot-matrix LED display modules to form the 16×16 dot matrix display mode. Show dynamic show that makes static graphic or text can be achieved, shifted out of various formats. This paper describes the hardware design of the LED dot matrix display, and the principle function of the various parts of the circuit, the corresponding software program design and the use of some such.
SCM process control system used for editing MCU assembly language, Programming control points indicated by the corresponding LED anode and overcast extreme level. We can effectively control the defense showed bright spots. The lattice data shows characters can prepare themselves (that is, direct lattice Painting), which can also be extracted from the standard font.
LED display with fabric means flexibility, stability, low power consumption, long life, mature technology, low-cost features at the station, securities, sports venues, transportation corridors and various indoor / dissemination of information on foreign shows occasions, good publicity, real-time environmental parameters, etc. countdown major activities are widely used.
 As the practice proves, the system possesses advantages in low shows errors, stable, rational structure and strong extensible abilities.

Key words: AT89C51 Micro Controller Unit；  LED； Lattice display；  Dynamic display； Assembly language.