【正文】 ll be traveling fast, so despite the distance, it will not be like diving into the deep end of a pool. It will be like he is diving into the shallow end. Skydiver preps for the big jumpWhen he jumps, he is expected to reach the speed of sound 690 mph (1,110 kph) in less than 40 seconds. Like hitting the top of the water, he will begin to slow as he approaches the more dense air closer to Earth. But this will not be enough to stop him pletely.If he goes too fast or spins out of control, he has a stabilization parachute that can be deployed to slow him down. His team hopes it39。 Have declared the end of the encounter that haven39。那些曾經(jīng)所謂的非做不可，只是青蔥年華里自己給自己注射的一支強(qiáng)心劑，或者說，是自以為是的精神寄托罷了。s time, your ideas are always special to clear. Want, want, line is clear, as if nothing could shake his. Also once seemed to be determined to do something, but more often is he backed out at last. Dislike his cowardice, finally found that there are a lot of love, there are a lot of miss, like shadow really have been doomed. Those who do, just green years oneself give oneself an arm injection, or is a selfrighteous spiritual.　　一個(gè)人的時(shí)候，自己的想法總是特別地清晰。t want to give vent to out your inner voice can be in the high school children of the feelings in a period, but was eventually infarction when graduation party in the throat, later again stood on the pitch he has sweat profusely, looked at his thrown a basketball hoops, suddenly found himself has already can39。The end of our life, and can meet many things really do?　　而窮盡我們的一生，又能遇到多少事情是真正地非做不可？During my childhood, think lucky money and new clothes are necessary for New Year, but as the advance of the age, will be more and more found that those things are optional。 May be back in the past, to oneself the paranoid weird belief disillusionment, these days, my mind has been very messy, in my mind constantly. Always feel oneself should go to do something, or write something. Twenty years of life trajectory deeply shallow, suddenly feel something, do it.　　一字開頭的年齡已經(jīng)到了尾聲。s 21 win.Michel Platini, president of European football39。s about how he felt and I would like to speak to him first to find out what his experience was.Uefa hasEmployment tribunals.The (lack of) air up there Watch mCayman Islandsbased Webb, the head of Fifa39。a damagesbased agreement, you should make sure you39。Further help.If you are being represented by a solicitor at the tribunal, they may ask you to sign an agreement where you pay their fee out of your pensation if you win the case. This is known as at you don39。 a[4] = sec/10000%10。 a[0] = sec%10。i++)。 TL1 = 0x67。 while(1)。break。 case 5: d2 = 0。j++。P2 = number[a[3]]。P3=0xff。break。 case 1: d6 = 0。j++。}void int_init(){ ET1 = 1。= 0xdf。sbit d6 = P3^5。sbit d2 = P3^1。uint8 a[6]。參考文獻(xiàn)[1] 李朝青. 單片機(jī)原理及接口技術(shù)（第3版）[M]. 北京：航空航天大學(xué)出版社，2006[2] 趙建領(lǐng). 51系列單片機(jī)開發(fā)寶典[M]. 北京：電子工業(yè)出版社，2007 [3] 耿永剛，陶國正. 單片機(jī)與接口應(yīng)用技術(shù)[M]. 上海：華東師范大學(xué)出版社，2008 [4] 孫惠芹. 單片機(jī)項(xiàng)目設(shè)計(jì)教程[M]. 北京：電子工業(yè)出版社，2009[5] 楊欣，王玉鳳，劉湘黔. 電子設(shè)計(jì)從零開始[M]. 北京：清華大學(xué)出版社，2005[6] 余永權(quán). ATMEL89系列單片機(jī)應(yīng)用技術(shù)[M]. 北京：北京航空航天大學(xué)出版社，2002附錄附錄1 系統(tǒng)總程序 include typedef unsigned char uint8。主要是編程學(xué)的不太成功，在老師的細(xì)心指導(dǎo)下，然后再加以修改錯(cuò)誤，最后完成設(shè)計(jì)?？匆幌嘛@示是否正確，時(shí)間運(yùn)行是否符合運(yùn)行軌跡。如果出現(xiàn)閃爍現(xiàn)象，就要改變一下延時(shí)時(shí)間，直到合理為止。在編譯調(diào)試通過以后，生成hex文件以待仿真之用。（4）調(diào)試程序調(diào)試程序時(shí)首先要明確程序的具體功能，對(duì)程序做認(rèn)真分析。圖32仿真圖第四章 系統(tǒng)調(diào)試 軟件程序編譯與調(diào)試（1）輸入源程序打開keil軟件，輸入源程序，輸入時(shí)應(yīng)以西文方式輸入字母和符號(hào)，且中文注釋前要加分號(hào)。首先打開已經(jīng)畫好的proteus DSN文件，雙擊圖中的AT89C51芯片，就彈出一個(gè)窗口，在Program File項(xiàng)中通過路徑選擇在WAVE中生成的HEX文件，雙擊選中后確定，這樣仿真圖中的AT89C51芯片就已經(jīng)讀取了本設(shè)計(jì)中的HEX文件。它包括標(biāo)題欄、主菜單、狀態(tài)欄、標(biāo)準(zhǔn)工具欄、繪圖工具欄、對(duì)象選擇按鈕、預(yù)覽對(duì)象方位控制按鈕、仿真進(jìn)程控制按鈕、預(yù)覽窗口、對(duì)象選擇器窗口、圖形編輯窗口等十幾個(gè)工具，方便了使用者的使用。④具有強(qiáng)大的原理圖繪制功能。圖31程序流程圖Proteus ISIS是英國Labcenter公司開發(fā)的電路分析與實(shí)物仿真軟件，它可以仿真、分析(SPICE)各種模擬器件和集成電路。C語言是處于匯編語言和高級(jí)語言之間的一種中間型程序設(shè)計(jì)語言，常被稱為中級(jí)語言。（8）生成的目標(biāo)代碼質(zhì)量高，程序執(zhí)行效率高。一般的高級(jí)語言語法檢查比較嚴(yán)，能檢測出幾乎所有的語法錯(cuò)誤，而C語言允許程序編寫者有較大的自由度，因此放寬了語法的檢查。說明：C語言的源文件，可以分割成多個(gè)源程序，分別進(jìn)行編譯，然后連接起來構(gòu)成可知性的目標(biāo)文件，為開發(fā)大型軟件提供了極大的方便。指針可以指向各種類型的簡單變量、數(shù)組、結(jié)構(gòu)和聯(lián)合，乃至函數(shù)等。（3）具有豐富的運(yùn)算符，多達(dá)34種。本設(shè)計(jì)決定采用C語言進(jìn)行編寫。~，NPN三極管9013做為位控制端的開關(guān)，~，與其相對(duì)應(yīng)的三極管就導(dǎo)通，對(duì)應(yīng)的數(shù)碼管導(dǎo)通顯示。按鍵電路與單片機(jī)的端口連接可以由用戶自己設(shè)定，均設(shè)為低電平有效。系統(tǒng)總電路圖如圖27所示。電路如圖26所示。動(dòng)態(tài)方式顯示時(shí)，各數(shù)碼管輪流選通，要使其穩(wěn)定顯示必須采用掃描方式，即在某一時(shí)刻只選通一位數(shù)碼管并送出相應(yīng)的段碼，在另一時(shí)刻選通另一數(shù)碼管，并送出相應(yīng)的段碼，依次規(guī)律循環(huán)，即可以使各位數(shù)碼管顯示將要顯示的字符，雖然這些字符是在不同時(shí)刻分別顯示，但由于人眼存在視覺暫留效應(yīng)，只要每位顯示間隔足夠短就可以給人同時(shí)顯示的感覺。數(shù)碼管顯示可以分為靜態(tài)顯示和動(dòng)態(tài)顯示兩種。圖24 復(fù)位電路對(duì)于數(shù)字顯示電路而言，通常采用LCD顯示或LED顯示。當(dāng)單片機(jī)已在運(yùn)行之中時(shí)，按下復(fù)位鍵也能使用使RST持續(xù)一段時(shí)間的高電平，從而實(shí)現(xiàn)上電加開關(guān)復(fù)位的操作。 晶體振蕩電路MCS