[畢業(yè)論文]分秒電子計時器

摘 要
　　　現(xiàn)在科技越來越發(fā)達，競爭越來越激烈，運用時間越來越精密，電子時鐘的設計成為現(xiàn)在社會的一大熱門。由單片機為主設計的電子時鐘設計,它由4按鍵輸入電路,時鐘電路,蜂鳴電路,復位電路,單片機,LED顯示器段碼驅動電路,4位LED顯示電路所組成。本次設計單片機部分分別進行了程序設計,設計本身是為了讓大家熟悉自己所學,把知識用于實際的過程,通過這個設計,大家可以熟悉單片機各方面的優(yōu)點,也是我選擇單片機完成本設計的原因,設計中,需要數(shù)電、模電、單片機、一些相關軟件的操作以及相關知識。

關鍵詞： 單片機；LED顯示器；AT89C2051；ULN2003
The electronic clock design
Abstrac
　　　The present science and technology to be more and more developed, The competition will more next month be intense, The time taken to deliver will be more and more precise, Electronic clock design into present society one big popular.Electronic clock design primarily designs which by the monolithic integrated circuit, it by 4 pressed key input circuit, the clock electric circuit, the buzzing electric circuit, repositions the electric circuit, the monolithic integrated circuit, the LED monitor section code actuation electric circuit, 4 LED display circuit composes.
This design monolithic integrated circuit part has carried on the programming separately, designs itself is in order to let everybody be familiar with oneself studies, uses in the knowledge the actual process, through this design, everybody may be familiar with the monolithic integrated circuit various aspects the merit, Also is I chooses the monolithic integrated circuit cost design the reason, In the design, needs to count the electricity, The mold electricity, the monolithic integrated circuit, Some correlation software operation as well as the related knowledge.
Key word: Monolithic integrated circuit; LED monitor; AT89C2051; ULN2003
 

目 錄
1 引 言 2
2 方案論證 3
3 硬件電路的設計 4
3.1 硬件電路的設計方案及框圖 4
3.3 時鐘電路的設計 5
3.4復位電路的設計 5
3.5 LED顯示電路設計 6
3.5.1 LED顯示器的選擇 6
3.5.2 LED的段驅動芯片的選擇 8
3.5.3 LED的位驅動芯片選擇 8
3.5.4 LED驅動電路和單片機的連接 8
3.6 按鍵電路 8
3.7 蜂鳴電路設計 9
3.8 電源部分 10
4 軟件設計方案 11
4.1 系統(tǒng)軟件設計方案框圖 11
4.2 主程序設計 11
4.2.1 主程序設計框圖 12
4.2.2 時鐘計時程序設計框圖 13
4.2.3 鍵盤接收子程序的設計 14
5 安裝與調試 15
5.1 系統(tǒng)硬件調試 15
5.2 軟件調試 15
總 結 16
致 謝 17
參 考 文 獻 18
附 錄電子時鐘原理圖………………………………………………………………19