論文標(biāo)準(zhǔn)WORD格式排版 20頁(yè) 8132字

摘要：以AT89S52單片機(jī)為主控制器和按鍵、顯示、實(shí)時(shí)時(shí)鐘及電機(jī)驅(qū)動(dòng)等外圍電路構(gòu)成了具有定時(shí)開/關(guān)功能的播放系統(tǒng)。主控制器的作用是對(duì)數(shù)據(jù)的存取和處理，還有及時(shí)響應(yīng)外部的三個(gè)中斷：按鍵中斷， 即T1計(jì)數(shù)器溢出中斷；實(shí)時(shí)時(shí)鐘更新結(jié)束中斷；霍爾脈沖計(jì)數(shù)中斷。選取實(shí)時(shí)時(shí)鐘芯片DS14285與控制器來(lái)實(shí)現(xiàn)自動(dòng)播放功能，從而實(shí)現(xiàn)無(wú)人職守。DS14285 是一款8 位并行方式的時(shí)鐘芯片,芯片采用地址/ 數(shù)據(jù)總線復(fù)用方式實(shí)現(xiàn)引腳的高效性，除了可向用戶提供報(bào)時(shí)和鬧鐘功能外,它還具有自動(dòng)后備電源功能和114 字節(jié)的用戶RAM ,可以使時(shí)間和用戶信息在系統(tǒng)掉電時(shí)不丟失。
Abstrat:A broadcast system with automatic on / off function was designed, which was composed of the main controller and peripheral circuits. A single-chip microcomputer AT89S52 was used as the main controller and the circuits consists of button, display, real-time clock and motor drives. The role of main controller is to access and to process the data. The main controller also responds timely to three outside interrupts, which are Key interruption, known as T1 counter overflow interruption, updated real-time clock interruption and Hall pulse counting interruption, respectively. To obtain the unattended function, a real-time clock chip of DS14285 and controller were used in the automatic playback capability. DS14285 is a 8-bit parallel manner clock chip which performs high efficiency by using address/data multiplex mode. The chip have a function of giving the correct time and using as alarm clock. It also has automatic backup battery and 114 bytes user RAM, which can make sure that the time and users’information in the system do not be lost when power fails.

關(guān)鍵詞：校園廣播；自動(dòng)播放；電控機(jī)蕊；單片機(jī)；AT89S52
實(shí)時(shí)時(shí)鐘；定時(shí)控制；DS14285；

目錄
摘要 ………………………………………………………………………………3
引言 ………………………………………………………………………………4
1．方案論證與比較………………………………………………………………5
1．1總體方案比較………………………………………………………………5
1．2各模塊方案比較……………………………………………………………6
1.2.1控制模塊 ………………………………………………………………6
1.2.2 驅(qū)動(dòng)電路模塊………………………………………………………7
1.2.3時(shí)鐘模塊 ………………………………………………………………7
1.2.4顯示模塊………………………………………………………………7
2.系統(tǒng)設(shè)計(jì)與實(shí)現(xiàn)…………………………………………………………………8
2.1硬件設(shè)計(jì) ……………………………………………………………8
2.2.1硬件組成 ………………………………………………………………8
2.2.2工作原理 ……………………………………………………12
2.2軟件設(shè)計(jì) ……………………………………………………………15
3．測(cè)試結(jié)果與分析……………………………………………………………20
4．總結(jié)…………………………………………………………
5．附錄…………………………………………………………
參考文獻(xiàn)…………………………………………………………