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畢業(yè)設計-基于stm32單片機的mp3播放器畢業(yè)設計(參考版)

2025-01-19 22:20本頁面
  

【正文】 t. Baumgartner still will free fall at a speed that would cause you and me to pass out, and no parachute is guaranteed to work higher than 25,000 feet (7,620 meters). cause there 。ll be traveling fast, so despite the distance, it will not be like diving into the deep end of a 張藍凱 基于 STM32 的 MP3 播放器設計 4 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。突然想到那件藍格子襯衫;那些被折成各種各樣形狀的信紙;那段從街角深巷伊始的友誼;還有那場還沒有開始就宣告了終結(jié)的邂逅計劃 …… 那些年那些天的非做不可,終于和青春一樣,都將在我們的人生中謝幕。 Have declared the end of the encounter that haven39。 Those were broken into various shapes of stationery。那些曾經(jīng)所謂的非做不可,只是青蔥年華里自己給自己注射的一支強心劑,或者說,是自以為是的精神寄托罷了。也曾經(jīng)好像已經(jīng)下定了決心去做某件事,但更多的時候是最后又打起了退堂鼓。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. 一個人的時候,自己的想法總是特別地清晰。 Originally, this world, can produce a chemical reaction to an event, in addition to resolutely, have to do, and time. 原來,這個世界上,對某個事件 能產(chǎn)生化學反應的,除了非做不可的堅決,還有,時間。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。t really grow up, it seems is not so important。 The end of our life, and can meet many things really do? 而窮盡我們的一生,又能遇到多少事情是真正地非做不可? During my childhood, think lucky money and new clothes are necessary for New Year, but as the advance of the age, will be more and more found that those things are optional??傆X得自己自己似乎應該去做點什么,或者寫點什么。 May be back in the past, to oneself the paranoid weird belief disillusionment, these days, my mind has been very messy, in my mind constantly. Always feel oneself should go to do something, or write something. Twenty years of life trajectory deeply shallow, suddenly feel something, do it. 一字開頭的年齡已經(jīng)到了尾聲。s actions. CSKA said they were surprised and disappointed by Toure39。s 21 win. Michel Platini, president of European football39。s Premier League match at Chelsea on Sunday. I am going to be at the match tomorrow and I have asked to meet Yaya Toure, he told BBC Sport. For me it39。s antiracism taskforce, is in London for the Football Association39。t charge you more than 35% of your pensation if you win the case. If you are thinking about signing up for a damagesbased agreement, you should make sure you39。t agree with the disciplinary action your employer has taken against you ? your employer dismisses you and you think that you have been dismissed unfairly. For more information about dismissal and unfair dismissal, see Dismissal. You can make a claim to an employment tribunal, even if you haven39。還有 我們 218 宿舍 的 全體 室友以及 07 電氣 1班 的每一 位同學們,謝謝你們給我了愉快的大學時光。為以后在工作崗位上發(fā)揮自己的才能奠定了堅實的基礎。在此謹向曾繁政老師、張偉亮老師致以誠摯的謝意和崇高的敬意! 通過這次畢業(yè)設計,使我深刻地認識到學 好專業(yè)知識的重要性,也理解了理論聯(lián)系實際的含義,并且檢驗了大學四年的學習成果。 他淵博的知識、開闊的視野和敏銳的思維給了我深深的啟迪 ,還有嚴謹?shù)闹螌W態(tài)度和熱忱的工作作風令我十分欽佩,他的指導使我受益非淺。我們的成功當然也離不開賀州學院物電系大學生 電子創(chuàng)新基地,基地為我們提供了實戰(zhàn)的平臺。新版) [M].機械工業(yè)出版社 .202211. [6] 陳正沖 .C 語言深度解剖 解開程序員面試筆試的秘密 [M].北京航空航天大學出版社 .202271. 張藍凱 基于 STM32 的 MP3 播放器設計 18 [7] 李寧 .ARM 開發(fā)工具 RealViewMDK 使用入門 [M].北京航空航天大學出版社 .202231. [8] 胡仁喜 .Altium Designer Summer09 從入門到精通 [M]. 機械工業(yè) 出版社 .2022121. 附 錄 圖 71系統(tǒng)頂層原理圖 賀州學院本科生畢業(yè)論文(設計) 19 圖 72 STM32控制器最小系統(tǒng)原理圖 張藍凱 基于 STM32 的 MP3 播放器設計 20 圖 73 外圍電路原理圖: 賀州學院本科生畢業(yè)論文(設計) 21 圖 74 VS1003原理圖: 圖 75 串口通信: 張藍凱 基于 STM32 的 MP3 播放器設計 22 圖 76 硬件 PCB: 7 致 謝 這次的研究設計 取得成功的不僅有我 自己的努力,更重要的是我們得到了大家共同的幫助,在這里首先要感謝我們學校 —— 賀州學院,對我們提供設備和技術上的支持。 雖然在這次設計中還存在許多不足 ,但是通過這次畢業(yè)設計 ,我掌握了很多硬件、軟件等方面的知識,也學會了很多課本上沒有的 東西 ,這為我以后更深入的學習打下了良好的基礎,同時也對我今后到社會工作中的發(fā)展很有幫助 。 5 總結(jié) 通過這次畢業(yè)設計的研究與制作,讓我了解了 MP3音樂文件的結(jié)構(gòu),以及在 SD卡上以 FAT16 存儲方式的基礎上,針對 MP3 各模塊部分,包括主控制芯片及音頻解碼芯片、 SD 卡模塊、以及 TFT 觸摸屏等 部分的分和互相協(xié)助配合下,完成了電路原理圖以及 PCB 制作,焊接與調(diào)試電路板,然后是軟件編程實現(xiàn)功能。 MP3_DREQ)==0)。在逐步檢查,排除了晶振的頻率,SPI 的速度, STM32 控制器的處理速度之后,發(fā)現(xiàn)原來是在寫入數(shù)據(jù)之后沒有等待VS1003 的 DREQ 引腳為高電平,就繼續(xù)寫入數(shù)據(jù)。通過與主控制器的晶振接法作比較后,在 VS1003的晶振引腳之間加上一個 1M的電阻后,系統(tǒng)就可以正常工作了。由于硬件系統(tǒng)上沒有接有 JTAG仿真接口,不能在 MDK中仿真調(diào)試,所以只能在程序中的每一個子初始化函數(shù)中加入一個串口測試程序,結(jié)果發(fā)現(xiàn)程序死在 VS1003的初始化中。 ( 7) 檢查無虛焊,無短路后,用硬毛刷浸上酒精沿引腳方向仔細擦拭,直到焊劑消失為止 ,即可完成焊接。 ( 5) 把 PCB 板 45 度角斜放或立起來,以保證焊接過程中,熔化的焊錫能順利流動。 ( 3) 在焊完對角后重新檢查芯片的位置是否對準 , 如有必要可進行調(diào)整或拆除并重新在 PCB板上對準位置。 經(jīng)過多次嘗試努力,終于找到了焊接貼片元件的訣竅: ( 1) 首先將元件小心地放到 PCB板上,使其與焊盤對齊,要保證芯片的放置方向是正確的。還有, 層之間的元件重疊,不顯示綠色報錯。 例 如: 由于設計的原理圖很大, 如果把所有的元件都畫在同一張原理圖上,那么將會顯得非常的雜亂,煩瑣。 ( 6) 插上耳機,即能聽到美妙的音樂。 ( 4) 設置啟動方式,將 Boot0接低電平, Boot1接低電平。 ( 2) 使用串口線將板子的串口與 PC機連接, 設置啟動方式,將 Boot0 接高電平,Boot1接低電平。 //讀多個 sector u8 SD_WriteMultiBlock(u32 sector, const u8 *data, u8 count)。 //讀一個 sector u8 SD_WriteSingleBlock(u32 sector, const u8 *buffer)。
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