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s misery, the cow told him to turn its hide into a pair of shoes after it died. The magic shoes whisked Niulang, who carried his two children in baskets strung from a shoulder pole, off on a chase after the empress. The pursuit enraged the empress, who took her hairpin and slashed it across the sky creating the Milky Way which separated husband from wife. But all was not lost as magpies, moved by their love and devotion, formed a bridge across the Milky Way to reunite the family. Even the Jade Emperor was touched, and allowed Niulang and Zhinu to meet once a year on the seventh night of the seventh month. This is how Qixi came to be. The festival can be traced back to the Han Dynasty (206 BCAD 220). Traditionally, people would look up at the sky and find a bright star in the constellation Aquila as well as the star Vega, which are identified as Niulang and Zhinu. The two stars shine on opposite sides of the Milky Way. Customs In bygone days, Qixi was not only a special day for lovers, but also for girls. It is also known as the Begging for Skills Festival or Daughters39。s largest virgin forest, and known for its spring and ecological environment, Arxan is marveled at by many tourists as the purest land on earth. You cannot miss out the Autumn of Arxan. It is definitely the best with brightlycolored scenery full of emotions. Autumn in the northern part of the country es earlier than the South. A September rain followed by the footprints of Autumn brings more colors to the once emerald green mountain and blooming grassland. Shutterbugs flock to see for themselves the marvel of splendid colors around the mountains and waters, many of whom have travel a long distance and even camp here only to capture a moment of the nature wonder. The silver birch turns golden, while the larch is still proudly green. You will find yourself drowned in the intoxicating red of the wild fruits as well as the glamour of flowers in full blown. And your heart will be lingering on the woods as it39。 } 請(qǐng)您刪除一下內(nèi)容, O(∩ _∩ )O 謝謝!??! Many people have the same mixed feelings when planning a trip during Golden Week. With heaps of time, the sevenday Chinese National Day holiday could be the best occasion to enjoy a destination. However, it can also be the easiest way to ruin how you feel about a place and you may bee more fatigued after the holiday, due to battling the large crowds. During peak season, a dream about a place can turn to nightmare without careful planning, especially if you travel with children and older people. As most Chinese people will take the holiday to visit domestic tourist destinations, crowds and busy traffic are inevitable at most places. Also to be expected are increasing transport and acmodation prices, with the possibility that there will be no rooms available. It is also mon that you39。 電子科技大學(xué) 第 25 頁(yè) i=0。 } } void int0(void)interrupt 0 using 0 { countor++。 default: break。 if(i7) i=0。 //調(diào)用延時(shí)函數(shù) Delay(10)。 P2=0xff。 Delay(10)。 //調(diào)用延時(shí)函數(shù) Delay(10)。 P2=0x3f。 Delay(10)。 //調(diào)用延時(shí)函數(shù) Delay(10)。 P2=0x0f。 Delay(10)。 //調(diào)用延時(shí)函數(shù) Delay(10)。 P2=0x03。 Delay(10)。 //調(diào)用延時(shí)函數(shù) Delay(10)。 case 5: if(i==0) P2=0x00。 if(i7) i=0。 //調(diào)用延時(shí)函數(shù) Delay(10)。 P2=0xff。 電子科技大學(xué) 第 24 頁(yè) Delay(10)。 //調(diào)用延時(shí)函數(shù) Delay(10)。 P2=0xfc。 Delay(10)。 //調(diào)用延時(shí)函數(shù) Delay(10)。 P2=0xf0。 Delay(10)。 //調(diào)用延時(shí)函數(shù) Delay(10)。 P2=0xc0。 Delay(10)。 //調(diào)用延時(shí)函數(shù) Delay(10)。 case 4: if(i==0) P2=0x00。 if(i3) i=0。 //調(diào)用延時(shí)函數(shù) Delay(5)。 //初始全滅 P2= xb[i]。 break。 i++。 Delay(10)。 //初始全滅 Delay(10)。 break。 //調(diào)用延時(shí)函數(shù) Delay(5)。 //調(diào)用延時(shí)函數(shù) P2=P21。 case 1: 電子科技大學(xué) 第 23 頁(yè) if(i==0) P2=0xff。 i++。 //每次循環(huán) P1的各二進(jìn)位右移位,高位補(bǔ) Delay(10)。 //初始全滅 Delay(10)。//亮燈模式手動(dòng)選擇 P2=0xff。 IT0=1。 } } /***************************** 函數(shù)功能:主函數(shù) *****************************/ void main(void) { EA=1。 while(qp) {delay()。n++) 。m++) for(n=0。 for(m=0。 //向中間亮 uchar xb[]={16,40,66,129}。 uchar i。 感謝我的家人在我求學(xué)期間給我精神以及物質(zhì)上的鼓勵(lì)和幫助,你們永遠(yuǎn)都是我生活最大的支柱。 特別是老師自身嚴(yán)謹(jǐn)?shù)墓ぷ鲬B(tài)度深深感染了我,讓我通過(guò)一學(xué)期的實(shí)驗(yàn)工作鍛煉了自己的動(dòng)手能力以及獨(dú)立分析、解決問(wèn)題的能力,并培養(yǎng)了我對(duì)待工作的認(rèn)真負(fù)責(zé)的態(tài)度,讓我一生受用,我再次由衷的感謝 程老師。 首先要感謝導(dǎo)師程遙老師的悉心指導(dǎo)。通過(guò)一學(xué)期 忙碌 的實(shí)驗(yàn)工作,終于完成了我的畢業(yè)論文。但是,這些功能是很基本的,在以后的時(shí)間里,還可以做很多的功能擴(kuò)展,比如可以做七盞燈,按照赤橙黃綠青藍(lán)紫的順序亮燈,這樣的效果是很美觀(guān)的,也可設(shè)置更多的功能鍵,用來(lái)實(shí)現(xiàn)更多的擴(kuò)展功能。希望自己以后能通過(guò)自己的不斷努力獲得更多的工藝和電力技術(shù)。增強(qiáng)了我對(duì)實(shí)際工藝技術(shù)、電子技術(shù)和設(shè)備技術(shù)等方面的認(rèn)識(shí),掌握了分析處理方法,調(diào)試、計(jì)算等基本技能的訓(xùn)練,具有一定程度的實(shí)際工作能力。在整個(gè)電路的設(shè)計(jì)過(guò)程中,花費(fèi)時(shí)間最多的是各個(gè)模塊電路的鏈接及電路的細(xì)節(jié)設(shè)計(jì)上,在 多種方案的選擇中,我們仔細(xì)分析其原理以及可行的原因,然后把原件進(jìn)行焊接調(diào)試,最后還是在老師的耐心指導(dǎo)下和同學(xué)的幫助下,使整個(gè)電路可穩(wěn)定工作。比如缺乏綜合應(yīng)用專(zhuān)業(yè)知識(shí)的能力,對(duì)材料的不了解,對(duì)調(diào)試問(wèn)題的發(fā)現(xiàn)不充分等等。 畢業(yè)設(shè)計(jì)收獲很多,作為電子專(zhuān)業(yè)的學(xué)生,設(shè)計(jì)是我們將來(lái)必須的技能,這次畢業(yè)設(shè)計(jì)恰恰給我們提供了一個(gè)應(yīng)用自己所學(xué)知識(shí)的機(jī)會(huì),從到圖書(shū)館查找資料到對(duì)電路的設(shè)計(jì)對(duì)電路的方針再到最后電路的成型,都對(duì)我所學(xué)的知識(shí)進(jìn)行了檢驗(yàn)。 電子科技大學(xué) 第 18 頁(yè) 通過(guò)這次實(shí)踐,極大的鍛煉了自己的電路設(shè)計(jì)實(shí)踐能力,培養(yǎng)了自己獨(dú)立設(shè)計(jì)能力。 此次畢業(yè)設(shè)計(jì)是我們從大學(xué)畢業(yè)生走向未來(lái)工程師重要的一步。應(yīng)用主控模塊輸出的控制信號(hào)去控制燈管內(nèi)的 L ED 板模塊工作,使得產(chǎn)品性能穩(wěn)定,便以安裝容易操作。功率損耗總是存在的,為了減少 功率損耗, 查閱資料后,采取了 LED 板模塊之間接口處用信號(hào)正向驅(qū)動(dòng)模塊芯片 MC4049連接 的方法 [13]。由于管內(nèi) LED 模塊使用的是 12V 電源,主控模塊單片機(jī)系統(tǒng)使用的是 5V電源,為了使單片機(jī) P0 口輸出的 三色 LED 驅(qū)動(dòng)信號(hào) 能夠驅(qū)動(dòng)管內(nèi) LED 燈亮,網(wǎng)上查閱資料后發(fā)現(xiàn) ULN2021 具有 電流增益高、工作電壓高、溫度范圍寬、帶負(fù)載能力強(qiáng)等特點(diǎn) ,適應(yīng)于各類(lèi)要求高速大功率驅(qū)動(dòng)的系統(tǒng) ,于是管內(nèi) LED模塊中使用了 ULN2021[12]。在器件的選擇時(shí),一些參數(shù)不知如何確定,比如電阻的阻值, LED 燈閃動(dòng)的頻率,周期等,這些參數(shù)不設(shè)定好直接會(huì)影響到彩燈運(yùn)行的效果。 電子科技大學(xué) 第 17 頁(yè) 如無(wú)異常情況,分別測(cè)量各關(guān)鍵點(diǎn)直流電壓,如果有異常情況,則調(diào)整電路元器件參數(shù)、等換元器件等,使電路最終工作在合適的工作狀態(tài) [11]。用萬(wàn)用表電阻檔檢查焊接和接插是否良好,元器件引腳之間有無(wú)短路,連接處有無(wú)接觸不良,電容極性是否正確,電源供電包括極性、信號(hào)源連線(xiàn)是否正確,電源端對(duì)地是否存在短路。 (二)電路的調(diào)試 本次試驗(yàn)和調(diào)試所用的儀器有:萬(wàn)用表、穩(wěn)壓電源等。經(jīng)過(guò)上述處理后元件容易焊牢 ,不容易出現(xiàn)虛焊現(xiàn)象。冷卻后,再將電烙鐵收回