【正文】 北京航空航天大學(xué)出版社， 2021． 電子科技大學(xué) 第 20 頁 致 謝 時(shí)光飛逝，轉(zhuǎn)眼間大學(xué)生活接近了尾聲 ?；仡櫿麄€(gè)大學(xué)階段的學(xué)習(xí)生活，我感觸良多，在這四年里，我不僅學(xué)習(xí)了很多科學(xué)文化知識(shí)，同時(shí)也慢慢做好了步入社會(huì)的準(zhǔn)備。從開始論文課題的選擇、實(shí)驗(yàn)過程中問題的解決以及最后實(shí)驗(yàn)結(jié)果的分析和總結(jié)，程老師給了我很大的幫助，給我提出了許多寶貴的意見和建議。 此外還要感謝其他同學(xué)，正是她們在實(shí)驗(yàn)過程中給我的耐心幫助才使得我的實(shí)驗(yàn)得以順利進(jìn)行，以她們自身的經(jīng)驗(yàn)教會(huì)我許多我以前不懂或者不熟悉的知識(shí)，同時(shí)還要感謝的其他同學(xué)給予的莫大關(guān)心和幫助。 最后，感謝所有給予我?guī)椭娜耍@份感動(dòng)我會(huì)銘記于心！ 電子科技大學(xué) 第 21 頁 附 錄（一） PCB 板 電子科技大學(xué) 第 22 頁 附 錄（二） 程序代碼 include //包含單片機(jī)寄存器的頭文件 define uchar unsigned char uchar countor 。 uchar xz[]={0X81,0x42,0x24,0x18}。 //向兩邊亮 /***************************** 函數(shù)功能：延時(shí)一段時(shí)間 *****************************/ void delay(void) { uchar m,n。mn50。 } void Delay(uchar p) { uchar q=0。q++。 //外部中斷設(shè)置 EX0=1。 countor=0。 while(1) { switch(countor) //手動(dòng)切換后的模式選擇 { case 0: if(i==0) P2=0xff。 //調(diào)用延時(shí)函數(shù) P2=P21。 //調(diào)用延時(shí)函數(shù) Delay(5)。 break。 //初始全滅 Delay(10)。 //每次循環(huán) P0的各二進(jìn)位左移位，高位補(bǔ) Delay(10)。 i++。 //從中間向兩邊同時(shí)掃 case 2: if(i==0) P2=0x00。 //調(diào)用延時(shí)函數(shù) P2= xz[i]。 //調(diào)用延時(shí)函數(shù) Delay(5)。 if(i3) i=0。 //從倆兩邊向中間掃 case 3: if(i==0) P2=0x00。 Delay(10)。 i++。 break。 //初始全滅 Delay(10)。 P2=0x80。 //調(diào)用延時(shí)函數(shù) Delay(10)。 Delay(10)。 P2=0xe0。 //調(diào)用延時(shí)函數(shù) Delay(10)。 Delay(10)。 P2=0xf8。 //調(diào)用延時(shí)函數(shù) Delay(10)。 Delay(10)。 P2=0xfe。 //調(diào)用延時(shí)函數(shù) Delay(10)。 Delay(10)。 i++。 break。 Delay(10)。 P2=0x01。 //調(diào)用延時(shí)函數(shù) Delay(10)。 Delay(10)。 P2=0x07。 //調(diào)用延時(shí)函數(shù) Delay(10)。 Delay(10)。 P2=0x1f。 //調(diào)用延時(shí)函數(shù) Delay(10)。 Delay(10)。 P2=0x7f。 //調(diào)用延時(shí)函數(shù) Delay(10)。 Delay(10)。 i++。 break。 } if(i7) i=0。 if(countor6) countor=0。 P2=0xff 。 ll wait in the line for one hour to get a ticket, and another two hours at the site, to only see a tiny bit of the place due to the crowds. Last year, 428 million tourists traveled in China over the weeklong holiday in October. Traveling during this period is a matter that needs thorough preparation. If you are short on time to plan the uping Golden Week it may not be a bad idea to avoid some of the most crowded places for now. There is always a place so fascinating that everyone yearns for. Arxan is a place like this. The beauty of Arxan is everlasting regardless of the changing of four seasons. Bestowed by nature, its spectacular seasonal landscape and mountains are just beyond word. Arxan is a crucial destination for the remended travelling route, China Inner Mongolia Arxan — Hailar — Manzhouli. It is also the joint of the four prairies across the SinoMongolian border, where people gravitate towards the exotic atmosphere mixed with Chinese, Russian, and Mongolia elements. As a historic site for the Yitian Battle, Arxan still embodies the spirit of Genghis Khan. Walking into Arxan, you will be amazed by a kaleidoscope of geous colors all the year round the Spring azaleas blooming red in the snow, the Summer sea wavering blue in the breeze, the Autumn leaves painted in yellow covering volcanic traces, and the Winter woods shining white on the vast alpine snowscape. Hinggan League Arxan city is situated in the far eastern area of Inner Mongolia Autonomous Region. Its full name Haren Arxan means hot holy water in the Mongolian language. Arxan is a tourism city in the northern frontier with a blend of large forest, grand prairies, vast snowfield, heaven lake cluster, thermium, as well as volcanic cluster. It is a rare and unique ecotourism base filled with healthy sunshine, clean air and unspoiled green. Nestled close to the country39。s time for the wild fruits to ripe. The picturesque Arxan in Autumn is indeed a fairyland only exists in a dream that satisfies all your fantasies. If it rains heavily on Saturday night, some elderly Chinese will say it is because Zhinu, or the Weaving Maid, is crying on the day she met her husband Niulang, or the Cowherd, on the Milky Way. Most Chinese remember being told this romantic tragedy when they were children on Qixi, or the Seventh Night Festival, which falls on the seventh day of the seventh lunar month, which is usually in early August. This year it falls on Saturday, August 2. Folklore Story As the story goes, once there was a cowherd, Niulang, who lived with his elder brother and sisterinlaw. But she disliked and abused him, and the boy was forced to leave home with only an old cow for pany. The cow, however, was a former god who had violated imperial rules and was sent to earth in bovine form. One day the cow led Niulang to a lake where fairies took a bath on earth. Among them was Zhinu, the most beautiful fairy and a skilled seamstress. The two fell in love at first sight and were soon married. They had a son and daughter and their happy life was held up as an example for hundreds of years in China. Yet in the eyes of the Jade Emperor, the Supreme Deity in Taoism, marriage between a mortal and fairy was strictly forbidden. He ordered the heaven troop to catch Zhinu back. Niulang grew desperate when he discovered Zhinu had been taken back to heaven. Driven by Niulang39。 Festival. In this day, girls will throw a sewing needle into a bowl full of water on the night of Qixi as a test of embroidery skills. If the needle floats on top of the water instead of sinking, it proves th