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畢業(yè)設(shè)計(jì)-基于at89c51單片機(jī)的多用戶門鈴設(shè)計(jì)-免費(fèi)閱讀

  

【正文】 二十年的人生軌跡深深淺淺,突然就感覺到有些事情,非做不可了。City39。nearest CAB.For more information about making a claim to an employment tribunal, seeFurther help.Employment tribunals are less formal than some other courts, but it is still a legal process and you will need to give evidence under an oath or affirmation.Most people find making a claim to an employment tribunal challenging. If you are thinking about making a claim to an employment tribunal, you should get help straight away from one of the organisations listed under //左循環(huán)移位函數(shù)}//【5】g an employment tribunal claiEmployment tribunals sort out disagreements between employers and employees.You may need to make a claim to an employment tribunal if: if(P2 == 0x00) P2 = 0xe0。 delay(3)。c)。 delay(3)。c)。 delay(3)。c)。 delay(3)。c)。x) for(y=110。 if(k5==0) Open()。 P1=0xff。 //初始化 TMOD = 0x11。void Open()。sbit k8=P3^7。sbit beep4=P1^3。外部電路采用施密特觸發(fā)方式觸發(fā)了復(fù)位鍵(RST),形成了復(fù)位信號(hào)輸出電路,并把信號(hào)傳送到每個(gè)引腳,按順序到了復(fù)位引腳,就會(huì)迅速響應(yīng)信號(hào)指令。其中每個(gè)口都是標(biāo)準(zhǔn)的雙向口。每個(gè)端口是8位精確的雙向口,共占了32針。這種內(nèi)存結(jié)構(gòu)是所謂的普林斯頓結(jié)構(gòu)。8051和其他單片機(jī)一樣,都有相同的控制和功能,就像樂隊(duì)也有打擊樂器一樣。ACC累加器是ALU運(yùn)算結(jié)果的存放單元,一般數(shù)據(jù)通過它來傳送。但是在一些單片機(jī)中不使用ROM / EPROM中,如8031,8032,80c系列等。s trigger, restore to the throne circuit sample to output , Schmitt of trigger constantly in each S5P2 , machine of cycle in having one more , then just got and restored to the throne and operated the necessary signal insidly. Restore to the throne resistance of circuit generally, electric capacity parameter suitable for 6 brilliant to shake, can is it restore to the throne signal high level duration greater than 2 machine cycles to guarantee. Being restored to the throne in the circuit is simple, its function is very important. Pieces of onechip puter system could normal running,should first check it can restore to the throne not succeeding. Checking and can pop one39。下面我將我搜集的一些主要電子元器件通過圖片放上來,具體如下圖: 萬(wàn)能板 AT89C52芯片 電子元器件參考文獻(xiàn)[1] [M].北京:航空航天大學(xué)出版社,1990:56.[2] [J].西安:西安電子科技大學(xué)出版社,1999:2228.[3] [M].西安電子科技大學(xué)出版社,2007:916.[4] [J].北京:電子工業(yè)出版社,2006:5562.[5] [M]. 北京:航天航空大學(xué)出版社,2002:87155.[6] 劉明. Keil Vision單片機(jī)技術(shù)與實(shí)踐[J].清華大學(xué)出版社,2010:627.[7] [M].電子工業(yè)出版社,2009:1243.[8] [M].北京:高等教育出版社,2006:132167.[9] [J].人民郵電出版社,2006:89109.[10] [M].西安電子科技大學(xué)出版社,2005:7495.[11] Myke [J],2003:3678.[12] [J].人民郵電出版社,2006:104123. 致謝本設(shè)計(jì)是在老師的指導(dǎo)下完成的。按下相應(yīng)的開關(guān),觀察電路的相應(yīng)狀態(tài)。首先在畫好的電路原理圖中選中需要編寫程序的芯片,并單擊鼠標(biāo)左鍵,打開Edition Component對(duì)話框,設(shè)置單片機(jī)晶振頻率為12MHZ,在此窗口中的program file欄中,選擇之前用keil軟件生成的KEIL生成的HEX文件。(3)creating hex file from wzh:創(chuàng)建名為“wzh”的HEX文件。程序錄入完成之后在菜單欄上找到File然后選擇save保存,在彈出保存框里給文件命名。這就是這個(gè)程序需要完成的功能,根據(jù)電路圖需要達(dá)到的效果,編寫的C語(yǔ)言程序可以滿足以上的所有要求。本設(shè)計(jì)購(gòu)買的三極管放大倍數(shù)為100。電阻給電容充電,電容的電壓緩慢上升直到VCC,沒到VCC時(shí)芯片復(fù)位腳近似低電平,于是芯片復(fù)位,接近VCC時(shí)芯片復(fù)位腳近高電平,于是芯片停止復(fù)位,復(fù)位完成。10PF。這個(gè)并聯(lián)諧振電路加到一個(gè)負(fù)反饋電路中就可以構(gòu)成正弦波振蕩電路,由于晶振等效為電感的頻率范圍很窄,所以即使其他元件的參數(shù)變化很大,這個(gè)振蕩器的頻率也不會(huì)有很大的變化。   /VPP:當(dāng)保持低電平時(shí),則在此期間外部程序存儲(chǔ)器(0000HFFFFH),不管是否有內(nèi)部程序存儲(chǔ)器。然而要注意:每當(dāng)用作外部數(shù)據(jù)存儲(chǔ)器時(shí),將跳過一個(gè)ALE脈沖。作為輸入,由于外部下拉為低電平,P3口將輸出電流(ILL)這是由于上拉的緣故。   P2口:P2口為一個(gè)內(nèi)部上拉電阻的8位雙向I/O口,P2口緩沖器可接收,輸出4個(gè)TTL門電流,當(dāng)P2口被寫1時(shí),其管腳被內(nèi)部上拉電阻拉高,且作為輸入。20號(hào)管腳GND:接地?!?P0口8位雙向線(在引腳的32~39號(hào)端子);~3 設(shè)計(jì)要求與方案設(shè)計(jì)的功能主要有兩個(gè):(1)當(dāng)有人來訪時(shí),實(shí)現(xiàn)系統(tǒng)手動(dòng)發(fā)出”叮 咚”的門鈴響聲;(2)當(dāng)有危險(xiǎn)或者異常發(fā)生時(shí),可通過按鈕實(shí)現(xiàn)報(bào)警提示; 方案一根據(jù)設(shè)計(jì)要實(shí)現(xiàn)的功能,用一個(gè)簡(jiǎn)單的單片機(jī)驅(qū)動(dòng)一個(gè)負(fù)載,根據(jù)選擇負(fù)載的不同,可以實(shí)現(xiàn)不同的門鈴響起不同的音樂,從而達(dá)到多用戶控制的功能。在片外:尋址范圍只有4KB;芯片引腳有40個(gè)。本設(shè)計(jì)制作的基于單片機(jī)的多用戶門鈴是以芯片AT89C51為中央處理器芯片。隨著人們生活水平的提高,小區(qū)的安全受到越來越多人的重視,得到一種簡(jiǎn)便實(shí)用的門鈴控制,不但可以保障小區(qū)的安全,而且能夠提高人們的效率。本文針對(duì)小區(qū)公寓樓的門鈴進(jìn)行設(shè)計(jì),來訪者只需要在樓下按下住戶的門鈴,相應(yīng)住戶家里的門鈴就會(huì)響起,住戶聽到門鈴的響起,可以按下室內(nèi)開關(guān)控制樓下大門的開啟。s life, greatly improves the village of security, satisfy people39。從最簡(jiǎn)單的門鈴,到基于單片機(jī)的多功能門鈴這是門鈴的進(jìn)步。該多用戶門鈴方便了人們的生活,提高了小區(qū)的安全性。在片內(nèi):CPU有16位;ROM有8KB;RAM有232B;有串/并行接口;有4個(gè)16位的定時(shí)/計(jì)時(shí)器;中斷源有8個(gè);增加了D/A和A/D轉(zhuǎn)換電路。當(dāng)按下時(shí),單片機(jī)控制揚(yáng)聲器發(fā)出”叮 咚”的提示音,當(dāng)有危險(xiǎn)或者異常的情況下,由用戶手動(dòng)按下按鈕提醒鄰居或者房子里的人有危險(xiǎn)需撤離,此設(shè)計(jì)適合本人此階段自身的設(shè)計(jì)水平[9]。   P1口:P1口是一個(gè)內(nèi)部提供上拉電阻的8位雙向I/O口,P1口緩沖器能接收輸出4TTL門電流。P2口在FLASH編程和校驗(yàn)時(shí)接收高八位地址信號(hào)和控制信號(hào)。在FLASH編程期間,此引腳用于輸入編程脈沖。   :外部程序存儲(chǔ)器的選通信號(hào)。表41 AT89C51引腳說明引腳功能特性RXD(串行輸入口)TXD(串行輸出口)INTO(外中斷0)INT1(外中斷1)T0(定時(shí)/計(jì)數(shù)器0外部輸入)T1(定時(shí)/計(jì)數(shù)器1外部輸入) AT89C51的主要性能參數(shù)(1)與MCS51產(chǎn)品指令系統(tǒng)完全兼容 (2)2k字節(jié)可重擦寫閃速存儲(chǔ)器 (3)1000次擦寫周期 (4) (5)全靜態(tài)操作:0Hz24MHz (6)兩級(jí)加密程序存儲(chǔ)器 晶振電路晶體振蕩器,簡(jiǎn)稱晶振。根據(jù)實(shí)際情況,對(duì)外接電容 C1,C2雖然沒有十分嚴(yán)格的要求,但電容容量的大小會(huì)輕微影響振蕩頻率的高低,振蕩器工作的穩(wěn)定性,起振的難易程度及溫度穩(wěn)定性。一般微機(jī)電路正常工作需要供電電源為5V177。經(jīng)實(shí)測(cè)元件知其電阻為10歐姆。 Sounders5BUTTONSwitches amp。Keil C51生成的目標(biāo)代碼效率非常之高,多數(shù)語(yǔ)句生成的匯編代碼很緊湊,容易理解[6]。本次設(shè)計(jì)的門鈴程序通過編譯,沒有錯(cuò)誤和提醒。雖然目前國(guó)內(nèi)推廣剛起步,但已受到從事單片機(jī)教學(xué)的教師、致力于單片機(jī)開發(fā)應(yīng)用的科技工作者和單片機(jī)愛好者的青睞。 仿真說明與分析在proteus里仿真時(shí),首先把畫好的電路原理圖。在整個(gè)仿真中,已經(jīng)實(shí)現(xiàn)了各個(gè)功能和達(dá)到了預(yù)期的效果。s accumulation device ACC, register B and procedure state register PSW, etc. Person who accumulate ACC count by 2 input ends entered of checking etc. temporarily as one operation often, e from person who store 1 operation is it is it make operation to go on to count temporarily , operation result and loopback ACC with another one. In addition, ACC is often regarded as the transfer station of data transmission on 8051 inside . The same as general microprocessor, it is the busiest register. Help remembering that agreeing with A expresses in the order. The controller includes the procedure counter , the order is depositted, the order decipher, the oscillator and timing circuit, etc. The procedure counter is made up of counter of 8 for two, amounts to 16. It is a byte address counter of the procedure in fact, the content is the next IA that will carried out in PC. The content which changes it can change the direction that the procedure carries out . Shake the circuit in 8051 onechip puters, only need outer quartz crystal and frequency to finely tune the electric capacity, its frequency range is its 12MHZ of . This pulse signal, as 8051 basic beats of working, namely the minimum unit of time. 8051 is the same as other puters, the work in harmony under the control of the basic beat, just like an orchestra according to the beat play that is manded. There are ROM (procedure memory , can only read ) and RAM in 8051 slices (data memory, can is it can write ) two t
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