【正文】 ll be traveling fast, so despite the distance, it will not be like diving 35 into the deep end of a pool. It will be like he is diving into the shallow end. Skydiver preps for the big jump When 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。突然想到那件藍格子襯衫；那些被折成各種各樣形狀的信紙；那段從街角深巷伊始的友誼；還有那場還沒有開始就宣告了終結的邂逅計劃 …… 那些年那些天的非做不可，終于和青春一樣，都將在我們的人生中謝幕。 Have declared the end of the encounter that haven39。 Those were broken into various shapes of stationery。那些曾經所謂的非做不可，只是青蔥年華里自己給自己注射的一支強心劑，或者說，是自以為是的精神寄托罷了。也曾經好像已經下定了決心去做某件事，但更多的時候是最后又打起了退堂鼓。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. 一個人的時候，自己的想法總是特別地清晰。 Originally, this world, can produce a chemical reaction to an event, in addition to resolutely, have to do, and time. 原來，這個世界上，對某個事件能產生化學反應的，除了非做不可的堅決，還有，時間。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。t really grow up, it seems is not so important。 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?？傆X得自己自己似乎應該去做點什么，或者寫點什么。 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到了尾聲。s actions. CSKA said they were surprised and disappointed by Toure39。s 21 win. Michel Platini, president of European football39。s Premier League match at Chelsea on Sunday. I am going to be at the match tomorrow and I have asked to meet Yaya Toure, he told BBC Sport. For me it39。s antiracism taskforce, is in London for the Football Association39。t charge you more than 35% of your pensation if you win the case. If you are thinking about signing up for a damagesbased agreement, you should make sure you39。t agree with the disciplinary action your employer has taken against you ? your employer dismisses you and you think that you have been dismissed unfairly. For more information about dismissal and unfair dismissal, see Dismissal. You can make a claim to an employment tribunal, even if you haven39。 default: break。 else break。 //按鍵釋放檢測 lcd_delay(10)。 } for (。 if (i==250) i=0。 if(0xfd==P3) { if (i%50==0) //速度為半秒減一次 { val。 //一秒內 是否釋放 } for (i=0。 if (0xfd==P3) continue。i=100。 disp()。 case 0xfd: lcd_delay(10)。 else break。 //按鍵釋放檢測 lcd_delay(10)。 } for (。 if (i==250) i=0。 if(0xfe==P3) { if (i%50==0) //速度為半秒加一次 { val++。 //一秒內是否釋放 } for (i=0。 if (0xfe==P3)continue。i=100。 disp()。 case 0xfe: lcd_delay(10)。 disp()。 // 初 始 化 并 啟 動DAC0832 dawr=0。測試 (第二版 ) ．華中理工大學出版社， 200o 2 李廣弟．單片機基礎．北京航空 航天大學出版社， 1995 3 趙茂泰．智能儀器原理及應用．北京：電子工業(yè)出版社， 1999 4 楊欣榮，凌玉華等．現(xiàn)代測控技術與智能儀器．長沙：湖南科學技術出版社，1995 5 陳榮章，孔云英．工廠電氣故障與排除方法． 化學 朱玉田 . 程控增益放大器實現(xiàn)方法的比較與選用 [J ] . 機電工程 , 1997 , (4) : 42～ 44. 6 華蘇重 , 林青 . 寬帶高增益精密程控增益放大器設計 [J ] . 電子測量儀器學報 , 1997 , (2) : 37～ 39. 7 王俊杰 , 黃心漢 . 程控增益放大器和自動調整增益放大器的設計 [J ] . 電子技術應用 , 1998 , (5) : 50～ 51. 8 何立民 . MCS 51 系列單片機應用系統(tǒng)設計 [M] . 北京 。謝謝你們！ 26 參考文獻 1 謝自美． 電子線路設計在此，我衷心感謝各位老師的指導和支持。在獲得知識的同時 ，我也認識到了自己還需要學習的東西很多，理論需要很好的結合實踐，全面分析并解決問題的能力有待提高。同時獲得了豐富的理論知識，極大地提高了實踐能力，并對當前電子領域的研究狀況和發(fā)展方向有了一定的了解，尤其在單片機及其接口技術方面，這對我今后進一步學習計算機方面的知識有極大的幫助。設計過 程，也好比是我們 的 成長歷程，常有一些不如意，也許這就是在對我們提出挑戰(zhàn)，勇敢過，也戰(zhàn)勝了，勝利的鐘聲也就一定會為我們而敲響。另外在編程中出現(xiàn)問題時，一定要戒驕戒躁，腳踏實地，認真看書，仔細分析，仔細調試，就一定會發(fā)現(xiàn)錯誤。 值得一提的是， 通過單片機課程設計，我不僅加深了對單片機理論的理解，還學會了 將理論很好地應用到實際當中去 。 這個設計過程中，我遇到過許多次失敗的考驗，就比如，自己對實際生活中的交通秩序的不了解給整個設計帶來的困擾， 連東南西北四個方向紅綠燈之間的關系都沒搞清楚，這是對現(xiàn)實生活中小細節(jié)的忽略。進一步熟練使用 Proteus 仿真軟件，加強了工程繪圖的能力，也提高了動手能力。但是也有一些地方需要改進，比如 自動增益模塊，由于一些原因，沒有調 試成功。 從仿 真結果來看，輸出的波形滿足了基本要求，無明顯失真，且放大倍數準確。并且由于電阻的集成制造，保證了其參數的一致性，放大器的穩(wěn)定性能取決于外接運算放大器的性能，電路中采用 CA3140可獲得非常穩(wěn)定的增益。比較適合于一般的數字控制的函數發(fā)生器、音響、自動化儀表、數控電壓源、數控電流源等電路中。 lcd_delay(1)。 //顯數據，關閉光標比較好 lcd_delay(1)。 lcd_delay(1)。 //第二行，并 ............ } 11． LCD初始化函數程序 此函數功能為液晶屏的設置及初始化。 /******************指針定位函數程序 ***************/ void lcd_moveto(unsigned char x,unsigned char y) { //顯示字符的位置：第 x 行 y列（ X=1或 2,Y=0~15） if (x==0) lcd_putmand(0x80|y)。 lcde=0。 P0=putchar。 lcdrw=0。 /*********************輸出字符函數程序 ********************/ void lcd_putchar(unsigned char putchar) { //寫數據 RS=High,RW=Low,E=High:寫數據 22 while(lcd_busy())。 } 9．輸出一個字符程序 此函數的功能為輸出一個字符到液晶屏上。 lcde=1。 lcde=0。 //判斷是否忙碌 lcdrs=0。 //返回標志判斷是否 LCD忙碌 } 8．寫命令函數 本函數 為向 LCD1602 內寫命令函數。 lcde=0。