點陣電子顯示屏--畢業設計

電子機電論文編號:JD024    論文字數:6952,頁數:22

目  錄
第一部分
摘要 .......................................................3
第二部分
1.設計任務..................................................4
1.1基本要求.................................................4
1.2發揮部分.................................................4
1.3創新部分.................................................4
2．方案論證與比較...........................................5
2.1 顯示部分................................................5
2.2 數字時鐘................................................5
2.3 溫度采集部分............................................6
2.4 芯片選擇................................................6
2.5 鬧鈴方式的選擇..........................................6
2.6 止鬧方式的選擇..........................................6
2.7 串口通訊芯片的選擇......................................6
3. 總體方案.................................................7
3.1 工作原理................................................7
3.2 總體設計................................................7
4．系統硬件設計.............................................7
4.1  AT89S52單片機最小系統..................................8
4.2  溫度測量模塊...........................................8
4.3  時鐘模塊...............................................8
4.4  鍵盤模塊...............................................9
4.5  LED點陣顯示模塊........................................10
4.6  電源的選擇.............................................11
4.7  PC機通訊...............................................12
4.8  整體電路...............................................12
5．系統軟件設計.............................................13
5.1  主程序流程.............................................13
5.2  掃描子程序.............................................14
5.3  時間程序...............................................15
5.4  PC機串口通訊程序.......................................15
5.5  亮度調節程序...........................................16
5.6  溫度程序...............................................17
6．測試與結果分析...........................................17
6.1  基本部分測試與分析.....................................17
6.2  發揮部分測試與分析.....................................18
6.3  創新部分測試與分析.....................................18
7．設計總結.................................................19
8．參考資料.................................................20
附錄........................................................21

摘   要 

     LED大屏幕顯示系統，以AT89S52單片機為核心，由鍵盤顯示、錄放音模塊、光電開關、溫度采集、定時鬧鈴、LED大屏幕顯示等功能模塊組成。基于題目基本要求，本系統對時間顯示和大屏幕顯示進行了重點設計。此外，擴展單片機外圍接口、溫度采集、非接觸式止鬧、滾動屏幕顯示、語音報時等功能。本系統大部分功能由軟件來實現，吸收了硬件軟件化的思想，大部分功能通過軟件來實現，使電路簡單明了，系統穩定性大大提高。本系統不僅成功的實現了要求的基本功能,發揮部分也得到完全的實現,而且有一定的創新功能。 
關鍵字：單片機   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
Key words: chip microcomputer  large screen display system   scroll screen display