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畢業(yè)論文-基于mcs-8031單片機(jī)的自動往返小車的設(shè)計(存儲版)

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【正文】 MOV 23H,00H MOV 24H,00H SETB EX1 。PC值出錯處理 NOP LJMP START 。上位加 1 MOV A,21H 。 高位加 1 MOV A,24H 。開外中斷 1 RETI 。掃描字入 A MOV P2,A 。掃描字入 A JNB ,ENDOUT 。采用了 PWM 脈寬調(diào)制技術(shù)改變電機(jī)的速度和轉(zhuǎn)向。在設(shè)計的過程中遇到問題,可以說得是困難重重,萬事開頭難,難免會遇到過各種各樣的問題,同時在設(shè)計的過程中發(fā)現(xiàn)了自己的不足之處,對以前所學(xué)過的知識理解得不夠深刻,掌握得不夠牢固。s 150th anniversary celebrations and will attend City39?;蛟S是愧疚于自己似乎把轉(zhuǎn)瞬即逝的很多個不同的日子過成了同一天的樣子;或許是追溯過去,對自己那些近乎偏執(zhí)的怪異信念 的醒悟,這些天以來,思緒一直很凌亂,在腦海中不斷糾纏。t remember his appearance. 童年時,覺得壓歲錢和新衣服是過年必備,但是隨著年齡的推進(jìn),會越來越發(fā)現(xiàn),那些東西根本就可有可無;初中時,以為要有一場暗戀才意味著真正的成長,但三年過去后,自己心平氣和的寫同學(xué)錄的時候, 突然就發(fā)現(xiàn)是不是真正的成長了,好像并 沒有那么重要了;然后到了高中,覺得非要吐露出自己的心聲才能 為高中生涯里的懵懂情愫劃上一個句點(diǎn),但畢業(yè)晚會的時候最終還 是被梗塞在了咽喉,后來再次站在他曾經(jīng)揮汗如雨的球場,看著他 投過籃球的Originally, 球框時,突然間發(fā)現(xiàn)自己已經(jīng)想不起他的容顏。 At the moment, the sky is dark, the air is fresh factor after just rained. Suddenly thought of blue plaid shirt。我們假裝一切仿佛都不曾發(fā)生,以此試圖忘卻傷痛,可就算隱藏得再好,最終也還是騙不了自己。 The initial impulse is to run away — to try and suppress these feelings by not acknowledging them. When we do this, we close ourselves off to the parts of our lives that we need to experience most. The next time you have this feeling of being truly unfortable, do yourself a favor and lean into the feeling. Act in spite of the fear. 我們的第一反應(yīng)總是逃避 —— 以為否認(rèn)不安情緒的存在就能萬事大吉,可這也恰好妨礙了我們經(jīng)歷最需要的生活 體驗(yàn)。s not needed. Instead, he plans to deploy his 270squarefoot (25squaremeter) main chute at an altitude of around 5,000 feet (1,524 meters). In order to deploy this chute successfully, he will have to slow to 172 mph (277 kph). He will have a reserve parachute that will open automatically if he loses consciousness at mach speeds. Even if everything goes as planned, it won39。 2. Embrace the unfortable We all know what that twinge of anxiety feels like. We know how fear feels in our bodies: the tension in our necks, the tightness in our stomachs, etc. We can practice leaning into these feelings of disfort and let them show us where we need to go.我們都經(jīng)歷過焦灼的煎熬感,也都感受過恐懼造成的生理反應(yīng):脖子僵硬、胃酸翻騰。 Baumgartner the disappointing news: Mission aborted. r plays an important role in this mission. Starting at the ground, conditions have to be very calm winds less than 2 mph, with no precipitation or humidity and limited cloud cover. The balloon, with capsule attached, will move through the lower level of the atmosphere (the troposphere) where our daytoday weather lives. It will climb higher than the tip of 第 23 頁 Mount Everest ( miles/ kilometers), drifting even higher than the cruising altitude of mercial airliners ( miles/ kilometers) and into the stratosphere. As he crosses the boundary layer (called the tropopause),e can expect a lot of turbulence. We often close ourselves off when traumatic events happen in our lives。嫌惡過自己的怯懦,最終卻發(fā)現(xiàn)有很多 緣分 ,有很多錯過,好像冥冥之中真的已經(jīng)注定。 Then in high school, think don39。s plaint. In a statement the Russian side added: We found no racist insults from fans of CSKA. Age has reached the end of the beginning of a word. May be guilty in his seems to passing a lot of different life became the appearance of the same day。re clear about the terms of the agreement. It might be best to get advice from an experienced adviser, for example, at a Citizens Advice Bureau. To find your nearest CAB, including those that give advice by , click on nearest CAB. For more information about making a claim to an employment tribunal, see Employment tribunals. The (lack of) air up there Cay man Islandsbased Webb, the head of Watch m Fifa39。以前我接觸的那些程序都是很短、很基礎(chǔ)的,但是在課程 設(shè)計中碰到的那些需要很多代碼才能完成的任務(wù)。 P2 口置 1 RET 。點(diǎn)亮 1毫秒 INC R1 。顯示數(shù)據(jù)首址 MOV R5,0FEH 。 將里程數(shù)移入顯示單元百位 IN1RET: POP PSW 。 不滿 10轉(zhuǎn) LLL 第 18 頁 MOV 22H,00H 。不滿 6圈轉(zhuǎn) LLL退出 MOV 20H,00H 。LED顯示一次 LJMP MAIN 。1秒定時用( 50毫秒 20次) MOV TL1,0B0H 。串口中斷入口 RETI 。 } else PWM1 = 0。//定時器裝初值 TR0 = 1。 EA=1。 } } /************電機(jī)正反向控制 **************/ void Motor_turn(void) { if(Key_turn == 0) { Delay(10)。j++) {} } /*******按鍵處理加 pwm 占空比,電機(jī)加速 **********/ void Motor_speed_high(void)// { if(Key_add==0) { Delay(10)。 /************函數(shù)聲明 **************/ void Delay(unsigned char x)。//低電平的占空比 unsigned char count1 = 0。 圖 占空比 為了得到小車自動反向信號,增加感應(yīng)裝置如下。根據(jù)公式: U=aVCC 其中: U為電樞電壓; a為脈沖的占空比( 0a1); VCC直流電壓源,這里為 5V。 脈寬調(diào)速系統(tǒng)的主電路采用脈寬調(diào)制式變換器,簡稱 PWM變換器。當(dāng)晶閘管被觸發(fā)導(dǎo)通時,電源電壓加到電動機(jī)上,當(dāng)晶閘管關(guān)斷時,直流電源與電動機(jī)斷開,電動機(jī)經(jīng)二極管續(xù)流,兩端電壓接近于零。該系統(tǒng)需要旋轉(zhuǎn)變流機(jī)組,至少包含兩臺與調(diào)速電動機(jī)容量相當(dāng)?shù)男D(zhuǎn)電機(jī),還要一臺勵磁發(fā)電機(jī),設(shè)備多、體積大、費(fèi)用高、效率低、維護(hù)不方便等缺點(diǎn)。其電路圖如圖 。在輪流點(diǎn)亮過程中,每位顯示器的點(diǎn)亮?xí)r間極為短暫,但由于人的視覺暫留現(xiàn)象及發(fā)光二極管的余輝效應(yīng),給人的印象就是一組穩(wěn)定的顯示數(shù)據(jù)。靜態(tài)顯示的數(shù)據(jù)穩(wěn)定,占用的 CPU時間少。經(jīng)由單片機(jī)處理之后顯示出來。 四. 8031 片外 ROM 連接 用譯碼法擴(kuò)展一片 2764,單片機(jī)擴(kuò)展 8K外部程序存儲器一般選用 2764 EPROM 芯片,硬件電路如圖 。上電后,由于電容C的充電和反相門的作用,使 RST持續(xù)一段時間的高電平。如果 RST 持續(xù)為高電平,單片 機(jī)就處于循環(huán)復(fù)位狀態(tài)。 外部振蕩方式是把外部已有的時鐘信號引入單片機(jī)內(nèi)。 8) PSEN:引腳 29,程序選通有效信號 ,當(dāng)從外部程序存貯器讀取指令時產(chǎn)生,低電平時,指令寄存器的內(nèi)容讀到數(shù)據(jù)總線上。 :INT0,外部中斷 0輸入口。 Vss:電路接地端。 第 1 頁 目 錄 摘要 ....................................................... 2 第一章 MCS8031單片機(jī)及其外圍電路 .......................... 3 一. MCS8031引腳及功能簡介 ............................ 3 二.時鐘電路 ........................................... 4 三.復(fù)位及復(fù)位電路 ..................................... 5 四. 8031片外 ROM 連接 .................................. 6 第二章 數(shù)碼管顯示里程方案設(shè)計 .............................. 7
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