【正文】 6PB 5PB 4PB 32223242526272829303132333435363738 圖 8255A的管腳分布 8255 與 MCS51 的接口 2021 級(jí)本科畢業(yè)設(shè)計(jì)論文 第 15 頁(yè) 共 24 頁(yè) 8255 和單片機(jī)的接口十分簡(jiǎn)單，只需要一個(gè) 8位的地址鎖存器即可。 圖 為 8255 擴(kuò)展實(shí)例 ： D 0D 1D 2D 3D 4D 5D 6Q 0Q 1Q 2Q 3Q 4Q 5Q 6D 0D 1D 2D 3D 4D 5D 6WRRDALEEA8051D 7 Q 7G GND373WRRDRESETCSA1A0D 78255PAPBPC 圖 8255與單片機(jī)的連接示意圖 LED 顯示單元 LED 顯示器是單片機(jī)應(yīng)用系統(tǒng)中常用的輸出器件。當(dāng)發(fā)光二極管導(dǎo)通時(shí)，相應(yīng)的一個(gè)點(diǎn)或一個(gè)筆畫(huà)發(fā)亮。 LED 數(shù)碼顯示器的結(jié)構(gòu) LED 數(shù)碼顯示器是 1 種由 LED 發(fā)光二極管組合顯示字符的顯示器件。下圖為 LED的外觀圖： 圖 LED的外觀圖 2021 級(jí)本科畢業(yè)設(shè)計(jì)論文 第 16 頁(yè) 共 24 頁(yè) LED 數(shù)碼顯示器有兩種連接方法： a)共陽(yáng)極接法。 圖 共陽(yáng)極接法 b)共陰極接法。每個(gè) 發(fā) 光二極管的陽(yáng)極通過(guò)電阻與輸入端相連，圖 。 在硬件調(diào)試的過(guò)程中，器件之間型號(hào)不匹配的現(xiàn)象尤為突出，由于沒(méi)有實(shí)際的設(shè)計(jì)經(jīng)驗(yàn)，我只能根據(jù)一些兒相關(guān)的數(shù)據(jù)進(jìn)行選型，但在實(shí)際的生產(chǎn)中，這樣做是很冒風(fēng)險(xiǎn)的，所以，我還要加強(qiáng)這方面的能力。我使用實(shí)驗(yàn)室中的 at89c51 軟件對(duì)程序進(jìn)行了測(cè)試，只有一些語(yǔ)句的使用順序、端口地址的設(shè)置以及一些參量的排列上存在問(wèn)題，最后都被一一改正了過(guò)來(lái)。 由于時(shí)間的關(guān)系，本設(shè)計(jì)還不是特別的完美，還存在著一些問(wèn)題沒(méi)有解決，只能留著在以后積累了經(jīng)驗(yàn)以后再解決了。歸納起來(lái)，主要有以下幾點(diǎn)： 大學(xué)時(shí)間是在學(xué)習(xí)基礎(chǔ)理論知識(shí)，并未真正地去應(yīng)用和實(shí)踐 ， 動(dòng)手能力 還很缺乏 。 我 體會(huì)到了所學(xué)理論知識(shí)的重要性：知識(shí)掌握得越多，設(shè)計(jì)得就更全面、更順利、更好。畢業(yè)設(shè)計(jì)能夠從理論設(shè)計(jì)和工程實(shí)踐相結(jié)合、鞏固基礎(chǔ)知識(shí)與培養(yǎng)創(chuàng)新意識(shí)相結(jié)合、個(gè)人作用和集體協(xié)作相結(jié)合等方面全面的培養(yǎng)學(xué)生的全面素質(zhì)。這些在我將來(lái)的工作和學(xué)習(xí)當(dāng)中都會(huì)有很大的幫助。平時(shí)課堂上所學(xué)習(xí)的知識(shí)大多比較陳舊，作為 機(jī)電專業(yè) 的學(xué)生，由于專業(yè)特點(diǎn)自己更要積極查閱當(dāng)前的最新通信資料。 實(shí)踐能力得到了進(jìn)一步提高，在調(diào)試過(guò)程中 積累了一些經(jīng)驗(yàn)。 畢業(yè)設(shè)計(jì)培養(yǎng)了嚴(yán)肅認(rèn)真和實(shí)事求是的科學(xué)態(tài)度。 參 考 文 獻(xiàn) 2021 級(jí)本科畢業(yè)設(shè)計(jì)論文 第 23 頁(yè) 共 24 頁(yè) 1 胡輝編等 .單片機(jī)原理及應(yīng)用設(shè)計(jì) .北京：中國(guó)水利水電出版， 2021 2 張毅剛等 .MCS51 單片機(jī)應(yīng)用設(shè)計(jì) . 哈爾濱 : 哈爾濱工業(yè)大學(xué)出版社 ,1999 3 張洪潤(rùn)等 .單片機(jī)應(yīng)用技術(shù)教程 .北京：清華大學(xué)出版社， 1997 4 張志良 .單片機(jī)原理與控制技術(shù) .北京：機(jī)械工業(yè)出版社， 2021 5 李華等 .MCS51 系列單片機(jī)使用接口技術(shù) .北京：北京航天大學(xué)出版社， 1999 6 張振榮等 .MCS51 單片機(jī)原理及實(shí)用用技術(shù) .北京：人民郵電出版社， 2021 7 朱定華 .單片機(jī)原理及接口技術(shù) .北京：電子工業(yè)出版社， 2021 8 吳金戊等 .8051 單片機(jī)實(shí)踐與應(yīng)用 .北京：清華大學(xué)出版社， 2021 9 周航慈等 .單片機(jī)程序設(shè)計(jì)基礎(chǔ) .北京：北京航天大學(xué)出版社， 1999 10 張友德等 .單片機(jī)微型機(jī)原理、應(yīng)用與實(shí)驗(yàn) .上海：復(fù)旦大學(xué)出版社， 1992 11 余成波等 .傳感器與自動(dòng)檢測(cè)技術(shù) .北京：高等教育出版社， 2021 12 賈伯年，俞樸，宋愛(ài)國(guó) .傳感器技術(shù) .南京：東南大學(xué)出版社， 2021 13 宋文續(xù) .自動(dòng)檢測(cè)技術(shù) .北京：冶金工業(yè)出版社， 2021 14 李元 .數(shù)字電路與邏輯設(shè)計(jì) .南京：南京大學(xué)出版社， 1997 15 Fengyu CONTROL SYSTEMS :LANZHOU UNIVERSITY PRESS,2021 16 IEEE Design Automation Standard Standard Hardware Description Language based on Verilog Hardware Description 1996 17 leonhard, W. Control of Electrical Drives 3 rd ed. SpringerVerlag，2021 18 Simplicity Synthesis Reference Manual. Version 2021 19 Katsuhiko Ogata. Modem Control Engineering. Publishing house of electronics industry, 196~202 2021 級(jí)本科畢業(yè)設(shè)計(jì)論文 第 24 頁(yè) 共 24 頁(yè) 您好，為你提供優(yōu)秀的畢業(yè)論文參考資料，請(qǐng)您刪除以下內(nèi)容， O(∩ _∩ )O 謝謝?。?！ A large group of tea merchants on camels and horses from Northwest China39。s Zhangye city during their journey to Kazakhstan, May 5, 2021. The caravan, consisting of more than 100 camels, three horsedrawn carriages and four support vehicles, started the trip from Jingyang county in Shaanxi on Sept 19, 2021. It will pass through Gansu province and Xinjiang Uygur autonomous region, and finally arrive in Almaty, formerly known as AlmaAta, the largest city in Kazakhstan, and Dungan in Zhambyl province. The trip will cover about 15,000 kilometers and take the caravan more than one year to plete. The caravan is expected to return to Jingyang in March 2021. Then they will e back, carrying specialty products from Kazakhstan A s mall art troupe founded six decades ago has grown into a household name in the Inner Mongolia autonomous region. In the 1950s, Ulan Muqir Art Troupe was created by nine young musicians, who toured remote villages on horses and performed traditional Mongolian music and dances for nomadic families. The 54yearold was born in Tongliao, in eastern Inner Mongolia and joined the troupe in says there are 74 branch troupes across Inner Mongolia and actors give around 100 shows every year to local nomadic people. I can still recall the days when I toured with the troupe in the early 39。t help but sing the folk songs, Nasun says. The vastness of Inner Mongolia and the lack of entertainment options for people living there, made their lives lonely. The nomadic people were very excited about our visits, Nasun recalls. We didn39。t just about sharing art with nomadic families but also about gaining inspiration for the music and dance. Ulan Muqir literally translates as red burgeon, and today39。s villages and entertain nomadic families, but their fame has spread around the world. On May 16 and 17, nearly 100 singers and dancers from the troupe performed at Beijing39。s president, who is also a renowned tenor, tells China Daily. During a tour in 1985, he went to a village and met an elderly local man, who told him a story about his friendship with a solider from Shenyang, capital of Northeast China39。s cultural foray overseas, has been widely panned by its home audience. Retitled Empresses in the Palace, the American version has been shortened from its original 76 episodes at 45 minutes each, to six 90minute episodes. The quick pacing threw off many native viewers, who are accustomed to a more leisurely daytimesoapstyle narrative rhythm. (Chinese TV stations would run two or three episodes every day.) I did not finish the fulllength version and found the truncated one not difficult to follow. What39。s to e and recapping the key points. This device, not used in the original, is culturally understandable but artistically mediocre. What puzzles me is the two new songs for the opening and end credits. They were written in English, but sung by Chinese with an unfortable accent. They were obviously designed to appeal to an Englishspeaking base, but do not jibe with the Chinese dialogue. Speaking of the dialogue, the English translation, picked apart by some Chinese, is too literal for my taste. I can imagine a typical American hit by a flurry of royal ranks, addresses and greetings, even multiple names and titles for the same person. The first half hour must be a swamp to wade through, very much like my exp