【正文】 2,1, 1,2,3,2, 5,4, 1,2,2,2, 3,2,4,2, 5,2,5,2, 5,1,4,1,3,1, 4,2,4,2, 4,1,3,1,2,1, 1,2,3,2, 1,4, 6,2,6,2, 6,1,5,1,4,1, 5,2,5,2, 5,1,4,1,3,1, 4,2,4,2, 4,1,3,1,2,1, 1,2,3,2, 5,4, 6,2,6,2, 6,1,5,1,4,1, 5,2,5,2, 5,1,4,1,3,1, 4,2,4,2, 4,1,3,1,2,1,1,2,3,2, 1,4}。 note_n++。 break。 int_n = d[music6[note_n]]。 int_n = int_n * music8[note_n]*5。 switch (key_state) { case 0: key_line = 0b00010000。 case 0b00011011: key_return = K4_3。 case 0b01001011: key_return = K2_3。 16 16 PORTB=0b00001111。 TCCR1B=0x08。 case 11: play_on=0。 play_on=1。s 21 win. Michel Platini, president of European football39。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(gè)人的時(shí)候，自己的想法總是特別地清晰。ll be traveling fast, so despite the distance, it will not be like diving 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 be enough to stop him pletely. If he goes too fast or spins out of control, he has a stabilization parachute that can be deployed to slow him down. His team hopes it39。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。s antiracism taskforce, is in London for the Football Association39。 } } break。 int_n=1。 DDRD=0x20。 } key_state++。 case 0b01001110: key_return = K2_1。 PINB)) // 再次讀列電平， { switch (key_line | key_value) // 與狀態(tài) 0 的相同，確認(rèn)按鍵 { // 鍵盤編碼，返回編碼值 case 0b00011110: key_return = K4_1。 int_n=1。 break。 note_n++。 note_n++。 if (note_n max[pp1]) { switch (pp) { case 1: OCR1A = t[music1[note_n]]。 flash unsigned char music3[100]= {1,4,1,4,5,4,5,4,6,4,6,4,5,8, 4,4,4,4,3,4,3,4,2,4,2,4,1,8, 5,4,5,4,4,4,4,4,3,4,3,4,2,8, 5,4,5,4,4,4,4,4,3,4,3,4,2,8, 1,4,1,4,5,4,5,4,6,4,6,4,5,8, 4,4,4,4,3,4,3,4,2,4,2,4,1,8}。 DDRD=0x20。 … case 2: PORTB=0b00001111。 保證了在一次按鍵過程中至少可以檢測(cè)到 2 次按鍵閉合，任意兩次按鍵檢測(cè)不會(huì)落在 1 個(gè)抖動(dòng)區(qū)內(nèi) 。 B 口 PB0PB7：用以對(duì)四乘四鍵盤掃描信號(hào)的采集以及控制。 LM386 是一種音頻集成功放，具有自身功耗低、更新內(nèi)鏈增益可調(diào)整、電源電壓范圍大、外接元件少和總諧波失真小等優(yōu)點(diǎn)的功率放大器，廣泛應(yīng)用于錄音機(jī)和收音機(jī)之中 。 本題設(shè)計(jì)的系統(tǒng)以 ATmega16 單片機(jī)為核心，本文應(yīng)用單片機(jī)和音樂發(fā)聲的相關(guān)知識(shí)設(shè)計(jì)了一個(gè)簡單的音樂播放器。方案三：ATMEGA16 作為 CPU 來控制，性價(jià)比 較高，我們平時(shí)運(yùn)用得多也較為熟悉 。音符的節(jié)拍我們可以用定時(shí)器來控制，送入不同 的初值，就可以產(chǎn)生不同的定時(shí)時(shí)間。若要顯示字型 1， PA 口輸出值為 0x06。 // 沒有按鍵，繼續(xù)掃描 else { key_state++。通過變量記錄中斷的次數(shù)，用于控制音符脈沖的各抒，實(shí)際上就是音符輸出的時(shí)間，代表了節(jié)拍的長度。 在本次課程設(shè)計(jì)過程中，自己懂得單片機(jī)知識(shí)運(yùn)用比較 重要 ，要想把這門課程學(xué)好需要不但課本上的知道，關(guān)鍵還是親手實(shí)踐鍛煉自己的動(dòng)手能力，只有在實(shí)踐中才能夠?qū)W到更多東西，從不知道到知道這個(gè)東西啊，知識(shí)來于課本理論與實(shí)踐相結(jié)合的產(chǎn)物啊，我們只有把理論更好的運(yùn)動(dòng)到實(shí)踐中學(xué)到了真正的知識(shí) 經(jīng)過這幾 周，我知道書本和實(shí)際操作還是很有差距的，而且自己的動(dòng)手能力還是很差，而且電子這一行還要求的細(xì)心仔細(xì)和耐心，在這三周中暴露出來很多自己的不足，以后要多加練習(xí)，多鍛煉自己的這些方面的能力。 unsigned char note_n=0。 note_n++。 note_n++。 break。 int_n = d[music9[note_n]]。 // 必須送 2 次?。?！ key_value = Key_mask amp。 break。 break。 } // Declare your global variables here void main(void) { PORTA=0x3f。 kai=1。 OCR1A = 0。 else TCCR1B = 0x08?；蛟S是愧疚于自己似乎把轉(zhuǎn)瞬即逝的很多個(gè)不同的日子過成了同一天的樣子；或許是追溯過去，對(duì)自己那些近乎偏執(zhí)的怪異信念的醒悟，這些天以來，思緒一直很凌亂，在腦海中不斷糾纏。 At the moment, the sky is dark, the air is fresh factor after just rained. Suddenly thought of blue plaid shirt。 From the corner at the beginning of deep friendship。二十年的人生軌跡深深淺淺，突然就感覺到有些事情，非做不可了。 } g an employment tribunal claim Employment tribunals sort out disagreements between employers and employees. You may need to make a claim to an employment tribunal if: ? you don39。 TCCR1B = 0x09。 while (1) { num=read_key()。 PORTB=0xFF。 break。 break。 // 讀列電平 if (key_value == Key_mask) key_line = 1。 int_n = int_n * music9[note_n]*5。 int_n = d[music7[note_n]]。 break。 note_n++。 bit play_on,key_stime_ok。 9 9 附錄 1：電路原理圖 10 10 附錄 2：源程序 include include flash unsigned char shu[10]={0x00,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07