單機片電子時鐘的設(shè)計方案-資料下載頁
2025-04-22 23:13本頁面
【正文】 寫操作需要提高注意，在寫一個字節(jié)的時候，AVR單片機的I/O口應(yīng)該一直保持輸出狀態(tài)，但在讀一個字節(jié)的時候，AVR單片機的I/O口應(yīng)該先是輸出狀態(tài)，然后變?yōu)檩斎霠顟B(tài)，而且必須改變時鐘信號的順序，所以筆者經(jīng)調(diào)試明白了時鐘信號與復(fù)位（片選）信號的關(guān)系：在寫入數(shù)據(jù)時，當(dāng)RST信號還沒有拉高之前，必須把時鐘信號初始化拉低。本設(shè)計系統(tǒng)小結(jié) 系統(tǒng)不足及功能拓展首先總結(jié)本設(shè)計系統(tǒng)的不足以及可考慮的進一步拓展：1) 可設(shè)置復(fù)位按鍵、調(diào)整時間按鍵（現(xiàn)在只能通過程序復(fù)位、設(shè)初始值，不能自動調(diào)時間）。2) 基于ds1302的缺陷，“年”時鐘寄存器只能控制個位及十位數(shù)字。3) 可加上蜂鳴器，利用中斷實現(xiàn)整點報時。4) 可設(shè)置鬧鈴功能。5) 可加上DS18B20溫度傳感器顯示溫度或加上SHT11溫濕度傳感器，在屏幕上動態(tài)顯示 實時溫濕度。 學(xué)習(xí)心得與展望本次畢業(yè)設(shè)計系統(tǒng)的學(xué)習(xí)心得與展望有：1) 理論與實踐相結(jié)合的重要性，通過實際動手，進一步學(xué)習(xí)了單片機知識。2) 學(xué)會了自主學(xué)習(xí)芯片的方法與技巧及編程上的經(jīng)驗，如：片選拉高之前必須將時鐘拉低，但是這一點芯片手冊時序圖不顯示，需經(jīng)驗積累。3) 通過實際動手打開了思路，有信心在短時間內(nèi)學(xué)習(xí)一種芯片。4) 知識的嚴(yán)密性很重要，團隊合作很重要。參考文獻[1] 楊欣等．電子設(shè)計從零開始[M]．北京：清華大學(xué)出版社．.[2] 李軍,劉君華. AVR單片機的特點及其應(yīng)用[J]. 測控技術(shù) , 2002,(07) .[3] 李慧. 基于FPGA的電子萬年歷設(shè)計[J]. 微計算機信息 , 2010,(20) .[4] ,.[5] 李振軍．電路設(shè)計基礎(chǔ)與典型范例[M]．北京：電子工業(yè)出版社．.Abstract: from the ancient time hourglass, to the present mechanical clock and watch, quartz clock, The timing technology development has gone through a long process of improvement, which fully shows the importance of time for both of the ancients and us now. Now, the global society has entered the information age, people bee more heavy dependence on time measurement precision, so that the clock is more and more widely used functional. Clearly, ordinary mechanical watches can’t satisfy the plex modern requirement, electronic clock emerge as the times require. Electronic clock time can not only meet the basic requirements, and it’s smallvolume, lowcost, the biggest bright spot is that it can be improved according to the needs of different customers by increasing the functions, so the electronic clock is more and more popular of people.This topic is focus on this and the main purpose of the study is to design a clock system based on the MCU. Due to the MCU has the advantages of affordable and plete functions, it is widely used in automatic control products. The study regard ATmega16 chip as the core, and is mainly made of real time clock chip DS1302, plete its display and timing function through the LCD screen, this design has conpleted the the hardware circuit function, and software programming using C language.Keywords: electronic clock DS1302 LCD screen14
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