基于單片機(jī)的LED點陣電子顯示屏設(shè)計

測控論文編號:CK073   論文字?jǐn)?shù):9975,頁數(shù):31

目 錄
摘要….……………………………………………………..…........I
1.選題的背景與意義…………………………………………...…..…1
2.設(shè)計任務(wù)……………………………………………….……..…..2
 2.1基本要求…………………………………………………………....2
 2.2發(fā)揮部分…………………………………………………………………….....….2
 2.3創(chuàng)新部分………………………………………………………………...….….….2
3．方案論證與比較……………………………………….…...………3
 3.1 顯示部分…………………………………………………………….……...…….3
 3.2 數(shù)字時鐘……………………………………………………………………....….3
 3.3 溫度采集部分……………………………………………………………..…...….4
 3.4 芯片選擇………………………………………………………..……………...…4
 3.5 鬧鈴方式的選擇…………………………………………………………..….…...4
 3.6 止鬧方式的選擇…………………………………………………………...……...5
 3.7 串口通訊芯片的選擇……………………………………………………………...5
 3.8 電源模塊……………………………………………………………….….……...5
4. 總體方案…………………………………….……………….......6
 4.1 工作原理…………………………………………………………………..……...6
 4.2 總體設(shè)計……………………………………….………………………….……...6
5．系統(tǒng)硬件設(shè)計………………………………………..…..….……..7
 5.1  AT89S52單片機(jī)最小系統(tǒng)……………………………………..………….……....7
 5.2  溫度測量模塊…………………………………………………………………....9
 5.3  時鐘模塊…………………………………………………………………..…...10
 5.4  鍵盤模塊………………………………………………………………….……10
 5.5  LED點陣顯示模塊……………………………………………………………….11
 5.6  電源的選擇……………………………………………………………….…….12
 5.7  PC機(jī)通訊……………………………………………………………………….13
 5.8  整體電路……………………………………………………………………….13
6．系統(tǒng)軟件設(shè)計……………………………………………..……....14
 6.1  主程序流程………………………………………………………………….….14
 6.2  掃描子程序……………………………………………………………….…….14
 6.3  時間程序……………………………………………………………………….15
 6.4  PC機(jī)串口通訊程序……………………………………………..……………….16
 6.5  亮度調(diào)節(jié)程序………………………………………………..…………………16
 6.6  溫度程序……………………………………………………………………….17
7．測試與結(jié)果分析………………………………………….……......19
 7.1  基本部分測試與分析………………………………………………….………...19
 7.2  發(fā)揮部分測試與分析……………………………………………….…………...19
 7.3  創(chuàng)新部分測試與分析……………………………………………….…………...19
8．設(shè)計總結(jié)……………………………………….….…………......21
致謝…………………………………………………….…..……..22
參考文獻(xiàn)………………………………………….……………......23
附錄………………………………………………………..….…..24

摘要

   LED大屏幕顯示系統(tǒng)，以AT89S52單片機(jī)為核心，由鍵盤顯示、錄放音模塊、光電開關(guān)、溫度采集、定時鬧鈴、LED大屏幕顯示等功能模塊組成。本系統(tǒng)對時間顯示和大屏幕顯示進(jìn)行了重點設(shè)計。此外，擴(kuò)展單片機(jī)外圍接口、溫度采集、非接觸式止鬧、滾動屏幕顯示、語音報時等功能。本系統(tǒng)大部分功能由軟件來實現(xiàn)，吸收了硬件軟件化的思想，大部分功能通過軟件來實現(xiàn)，使電路簡單明了，系統(tǒng)穩(wěn)定性大大提高。本系統(tǒng)不僅成功的實現(xiàn)了要求的基本功能,發(fā)揮部分也得到完全的實現(xiàn),而且有一定的創(chuàng)新功能。 

關(guān)鍵詞：單片機(jī)、LED大屏幕、滾屏顯示

Abstract

This large LED display screen system ,based on chip microcomputer AT89S52,is composed by the following functional modules : keyboard displaying ,sound  phonating. photoelectricity untouched switch，temperature gathering ,timing bell, 
According to the basic requirements of the subject ,our system stresses on the realization of time displaying and large screen displaying ,Furthermore ,we also extend the primary function ,adding new functions ,such as the single chip peripheral ports ,temperature gathering ,untouched ring-stop, scroll screen display, sound timing .and so on.
Adopting the idea of hardware-to-software, most of those functions are realized by softwares, which makes the electrocircuit more concise and the system more stable ,
The design achieved and even exceeded all the required basic technical indexes

Keywords：chip microcomputer、large screen display system、scroll screen display