畢業(yè)設(shè)計(jì)-基于at89c51單片機(jī)的帶彩燈外觀音樂盒設(shè)計(jì)(存儲版)
【正文】 9。嫌惡過自己的怯懦，最終卻發(fā)現(xiàn)有很多 緣分 ，有很多錯(cuò)過，好像 冥冥之中真的已經(jīng)注定。 Baumgartner the disappointing news: Mission aborted. r plays an important role in this mission. Starting at the ground, conditions have to be very calm winds less than 2 mph, with no precipitation or humidity and limited cloud cover. The balloon, with capsule attached, will move through the lower level of the atmosphere (the troposphere) where our daytoday weather lives. It will climb higher than the tip of Mount Everest ( miles/ kilometers), drifting even higher than the cruising altitude of mercial airliners ( miles/ kilometers) and into the stratosphere. As he crosses the boundary layer (called the tropopause),e can expect a lot of turbulence. The supersonic descent could happen as early as Sunda. The weatheThe balloon will slowly drift to the edge of space at 120,000 feet ( Then, I would assume, he will slowly step out onto something resembling an Olympic diving platform. Below, the Earth bees the concrete bottom of a swimming pool that he wants to land on, but not too hard. Still, he39。t start planning... Those years, those days of do, finally, like youth, will end in our life. 此刻，天空是陰暗的，空氣里有著剛下過雨之后的清新因子。想要的，不想要的，界限明確，好像沒有什么可以撼動(dòng)自己。 Junior high school, thought to have a crush on just means that the real growth, but over the past three years later, his writing of alumni in peace, suddenly found that isn39。s governing body, has also ordered an immediate investigation into the referee39。t appealed against the disciplinary action your employer has taken against you. However, if you win your case, the tribunal may reduce any pensation awarded to you as a result of your failure to appeal. Remember that in most cases you must make an application to an employment tribunal within three months of the date when the event you are plaining about happened. If your application is received after this time limit, the tribunal will not usually accept i. If you are worried about how the time limits apply to you, take advice from one of the anisations listed under Further help. Employment tribunals are less formal than some other courts, but it is still a legal process and you will need to give evidence under an oath or affirmation. Most people find making a claim to an employment tribunal challenging. If you are thinking about making a claim to an employment tribunal, you should get help straight away from one of the anisations listed under 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 a damagesbased agreement. In England and Wales, your solicitor can39。 fm=1。 jp=temp/16。 fm=0。x) for(y=112。 for(x=z。 fm=~fm。//去抖 if(key2==0) { count1=0。//關(guān)總中斷 delay1(1)。} P1=huayang6[x]。 delay1(300)。 } break。x13。 fm=0。} P1=huayang2[x]。 delay1(300)。 ET0=1。//唱第一首歌 EA=1。 uchar yinyue[]={0xff,0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f,0x0,0x0}。字節(jié)低位控制該音調(diào)持續(xù)的時(shí)間， //代表多少個(gè)十六分音符。//花樣燈 2 uchar code huayang3[]={0x7f,0x3f,0x1f,0x0f,0x07,0x03,0x01,0x0, 0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff}。 總之可以說是收益匪淺。按 key2 可聽到動(dòng)聽的音樂 ， 每按一次變化為下一首歌。 揚(yáng)聲器接到 上。因此每個(gè)音樂代碼有八位數(shù)字組成，高四位控制音調(diào)，低四位通過延時(shí)程序?qū)υ撘粽{(diào)進(jìn)行延時(shí)。只要算出某一音頻的周期 (1/頻率 )，然后將此周期除以 2，即為半周期的時(shí)間。s spiritual culture. Traditional music box is heavy mechanical type, size, pronunciation and drab, cannot achieve batch production. Music box designed in this paper based on AT89C51 microcontroller as the core element of electronic music box, small size, light weight, can play music, multifunction, appearance and colorful, with a lantern,easy to use. The music box with three buttons , The key1 control Lantern, key2 control music, key3 total switch can turn off the music and lanterns. Have so me mercial value. Keywords: AT89C51, music boxes, buttons, Lantern 單片機(jī) 原理及系統(tǒng)課程設(shè)計(jì)報(bào)告 2 1 引言 設(shè)計(jì)目的 隨著電子技術(shù)及計(jì)算機(jī)技術(shù)的發(fā)展， 單片機(jī)在日常生活中的應(yīng)用越來越廣泛，同時(shí)也顯現(xiàn)出了它的重要性，尤其在一些特殊的場合更是不可代替。小小的音樂盒可以給人們帶來美好的回憶，提高人們的精神文化享受。 設(shè)計(jì)要求 音樂 盒 有三個(gè)按鍵 key1， key2， key3，其中 key1 控制彩燈的樣式，本設(shè)計(jì)有六種彩燈花樣，每按一次變換一種樣式。 此外結(jié)束符和休止符可以分別用代碼 0xff和 0x00 來表示，若查表結(jié)果為 0xff，
畢業(yè)設(shè)計(jì)相關(guān)推薦
鄂ICP備17016276號-1