【正文】 ,22H,12H,24H,32H,52H,52H,32H,62H,52H,61H,51H,31H,21H,21H,31H,21H,11H,1CH DB 21H,31H,22H,23H,31H,21H,18H,02H,0B2H,0BCH,0B4H,72H,61H,51H,72H,61H,71H,61H,51H,61H,71H,61H,6FH DB 86H,94H,12H,22H,32H,52H,64H,62H,51H,31H,52H,21H,31H,21H,33H,62H,0B2H,0B2H,62H,51H,61H,51H,31H,54H DB 62H,0B2H,72H,61H,51H,51H,61H,51H,31H,54H,61H,0B2H,72H,61H,51H,51H,61H,51H,31H,32H,21H,11H,32H,51H,61H,54H DB 02H,32H,24H,32H,52H,52H,32H,22H,31H,21H,11H,24H,32H,52H,62H,0B2H,72H,61H,51H,61H,51H,31H,32H,52H,52H,32H,62H DB 51H,31H,31H,21H,11H,91H,23H,31H,21H,1CH,12H,24H,32H,62H,51H,31H,34H,0B4H,72H,61H,51H,63H,71H,64H DB 0B2H,54H,72H,62H,71H,61H,54H,61H,51H,31H,21H,34H,73H,61H,54H,22H,32H,52H,22H,36H,52H,62H,61H,31H,32H,21H,11H,21H,11H,91H,81H DB 94H,52H,62H,52H,42H,32H,22H,32H,52H,0B4H,74H,64H,52H,61H,51H,41H,5CH,02H,52H,0B4H,74H,63H,51H,61H,51H,31H,21H DB 00。第九首十年。TABLE90: DB 02H,11H,21H,32H,32H,22H,32H,21H,11H,0A1H,91H,92H,0D1H,91H,83H,91H,0A2H,91H,81H,94H,11H,0A1H,91H,0A1H,98H,03H,81H,0A1H,0A1H,91H,0A1H DB 98H,04H,02H,11H,21H,32H,32H,22H,32H,21H,31H,51H,11H,13H,31H,22H,22H,21H,11H,0A1H,11H,13H,11H,11H,0A1H,91H,0A1H DB 11H,93H,94H,03H,81H,11H,0A1H,91H,81H,92H,0A1H,91H,94H,08H,03H,81H,32H,21H,11H,22H,31H,21H,21H,83H DB 01H,11H,91H,0A1H,11H,61H,51H,11H,34H,01H,31H,21H,31H,48H,23H,31H,32H,42H,38H,03H,11H,21H,52H,31H DB 33H,31H,31H,41H,51H,61H,23H,21H,21H,41H,31H,21H,13H,0D1H,0D1H,21H,11H,0A1H,11H,91H,92H,91H,11H,0A1H,91H DB 0A1H,31H,31H,22H,0A1H,11H,14H,01H,11H,21H,31H,63H,31H,42H,51H,31H,31H,22H,11H,21H,52H,31H,33H,31H,31H,41H DB 51H,61H,23H,21H,21H,41H,31H,21H,13H,0D1H,0D1H,21H,11H,0A1H,11H,91H,92H,91H,11H,0A1H,91H DB 0A2H,41H,31H,22H,31H,21H,12H,12H,11H,11H,21H,31H,63H,51H,32H,11H,21H,26H,11H,0A1H,18H DB 00。第十首你的愛給了誰。TABLE100: DB 02H,91H,0A1H,16H,21H,11H,0A6H,81H,0A1H,9CH,02H,91H,0A1H,16H,21H,31H,24H,21H,0A1H,11H,0A1H DB 9CH,02H,11H,21H,36H,32H,24H,21H,0A1H,11H,0A1H,9CH,02H,91H,0A1H,14H,11H,11H,21H,11H,0A4H,04H,04H,02H,0A1H,11H,0A1H,93H,92H DB 02H,61H,71H,0B4H,0B2H,0B1H,0B1H,76H,0B1H,71H,6CH,02H,61H,71H,0B6H,0B1H,0B1H,76H,0B1H,71H,6CH,02H,51H,61H,56H,61H,51H,54H,51H,0B1H,71H,0B1H DB 72H,62H,68H,02H,61H,51H,66H,62H,58H,0CH,02H,51H,41H,5FH DB 02H,91H,0A1H,16H,21H,11H,0A6H,81H,0A1H,9CH,02H,91H,0A1H,16H,21H,31H,24H,21H,0A1H,11H,0A1H DB 9CH,02H,11H,21H,36H,32H,24H,21H,0A1H,11H,0A1H,9CH,02H,91H,0A1H,14H,11H,11H,21H,11H,0A4H,04H,04H,02H,0A1H,11H,0A1H,93H,92H DB 02H,61H,71H,0B4H,0B2H,0B1H,0B1H,76H,0B1H,71H,6CH,02H,61H,71H,0B6H,0B1H,0B1H,76H,0B1H,71H,6CH,02H,51H,61H,56H,61H,51H,54H,51H,0B1H,71H,0B1H DB 66H,62H,54H,0B2H,71H,61H,6CH DB 00 END 實驗控制流程圖如下：初始化變量及LCD接口初始化計數(shù)器T0,定時器T1LCD顯示英文歡迎字符等待按鍵，是否有按鍵？包括播放鍵，暫停鍵，停止鍵歌曲號及播放時間顯示在LCD上主程序開始依據(jù)按鍵碼演奏對應的歌曲YN使用說明：鍵盤如下：0123456789ABCDEF按鍵功能說明：1~A：十首歌曲C：上一首歌曲D：下一首歌曲E：歌曲暫停F：開機畫面四、調試程序調試中出現(xiàn)的問題及解決的辦法：1． 有時會出現(xiàn)程序一點錯誤也沒有，但就是不能正常運行的現(xiàn)象，最后我們發(fā)行是因為程序中有的指令書寫得不規(guī)范導致的，例如有的RET返回指令一定要按正確格式書寫或在兩行指令間最好不要留空行。2． 程序中的跳轉指令的運用很重要，為保險起見，都用LJMP,我們就遇到過跳轉指令用錯程序無法正常運行的現(xiàn)象。當用JNZ指令時，跳轉范圍比較少，這時要用一個標號中轉。3． 編程時要注意，在程序開始時，要寫入各定時器中斷的入口地址。4． 編程過程中要注意加注釋或分割線，否則，在程序過長時容易變得很亂，不便于查找或更改。5． 程序的結構要設計的合理，避免上下亂調用的現(xiàn)象，這樣會使程序更加清晰化。6． 編程前要加流程圖，這樣會使思路清晰，例如數(shù)字音樂盒的設計思路完全可以按著MP3的工作方式列寫流程圖。7． LCD計時正常顯示的解決辦法：a. 兩個定時器同時工作，存在中斷時序問題，剛開始時我們把定時器1設定在方式3，計250us，由于定時中斷過于頻繁，使CPU負載過大，導致音樂不能正常播放，時間不能正常顯示。解決辦法：將定時器1設定在工作方式1，16位計數(shù)，計50ms,效果有很大改觀。但還有問題。b. 當音樂為全4拍起始時，此時音樂節(jié)奏與定時器T1中斷頻率錯開，LCD顯示和音樂播放都會好一些。c. 另外，在歌曲中，當遇到一個音符發(fā)音為4拍，在編曲中為*CH，托因時間較長，當定時器T1此時來中斷時，就會對歌曲播放產(chǎn)生影響，若改為發(fā)音一拍，中斷對歌曲播放影響減弱，但音樂效果變差。d. 改進方案：若采用可以定時時間更長的單片機，可以避免所有問題。五、收獲，體會與建議：1． 本學期學習單片機的時間只有8周時間，對單片機的硬件設計，軟件設計掌握的深度不夠，但通過此次課程設計，卻改變了很多，首先對于硬件電路的工作原理有了進一步的學習，同樣就有了進一步的認識；其次軟件方面，在程序的設計，程序的調試方面都學到了很多東西，這是第一次編寫單片機的大程序，很有成就感。2． 在一個好的氛圍里才能踏下心來做東西，在這幾天課設的時間里，實驗室的氛圍對我們的影響很大，大家一起努力，這也是我們能完成課設的動力。另外在編程中出現(xiàn)問題時，一定要戒驕戒躁，腳踏實地，認真看書，仔細分析，仔細調試，就一定會發(fā)現(xiàn)錯誤，克服困難，我們也是這么做的，這在課設中十分重要。3． 最后要提一點建議，希望下一次課程設計中，每個人都能有一塊實驗開發(fā)板，這樣能使每個人都能得到充分的鍛煉！六、參考文獻[1]徐泳龍. 單片機原理及應用. 機械工業(yè)出版社 [2]曹天漢. 單片機原理與接口技術. 電子工業(yè)出版社 [3]張有德，趙志英，涂時亮. 單片微型機. 復旦大學出版社25