【正文】 圖 32 軟件設(shè)計(jì)流程 開(kāi)始 初始化 設(shè)置中斷屬性、設(shè)置定時(shí)器 打開(kāi)中斷、打開(kāi)定時(shí)器 判斷按鍵的編號(hào) 執(zhí)行播放命令 判斷按鍵是否按下 結(jié)束 貴陽(yáng)學(xué)院本科畢業(yè)論文（設(shè)計(jì)） 12 第四章 系統(tǒng)調(diào)試及分析 在比較了市面上較多的仿真軟件之后，在從對(duì)軟件熟悉程度以及自己的畢業(yè)設(shè)計(jì)要求做了認(rèn)真的對(duì)比之后，慎重選擇的 仿真平臺(tái)為 Proteus 軟件 ，結(jié)果證明這是能夠達(dá)到此次畢業(yè)設(shè)計(jì)的仿真要求的 。在本次設(shè)計(jì)中是借助于 keilc51 軟件仿真器。 在論文設(shè)計(jì)過(guò)程中 ， 遇到諸多的麻煩 ，后來(lái) 經(jīng)過(guò)老師及其同學(xué)的大力幫助 ， 并對(duì)前期的方案進(jìn)行系統(tǒng)地修改后，方才得出一個(gè)更為合適的可行性方案，使得論文順利完稿， 在這里 我非常感謝對(duì)我在論文設(shè)計(jì)過(guò)程中提供過(guò)幫助的老師和同學(xué) 。 貴陽(yáng)學(xué)院本科畢業(yè)論文（設(shè)計(jì)） 22 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?。。 national survey was recently launched to evaluate the eye health of Chinese children andteenage June 6, China39。s longtime executive chef embraces mapo tofu and other exotic elements for the burgerdriven menu, Liu Zhihua the age of 37, Shanghai native Lin Zhengu has bee a star as a Western cuisine chef in the Chinese metropolis, a city that has a wealth of Western restaurants. The executive chef of Blue Frog Bar and Grill, a popular burgerbased restaurant and bar chain on the Chinese mainland, Lin is the soul of the restaurant franchise39。s suggestion that a special day be marked in the year for the global practice of the stressbusting regimen, which is already a multibillion dollar industry in the United States. Modi said in the speech: Yoga is an invaluable gift of India39。 void timer1(void) interrupt 3 using 2 { TH1=0x0c。期間學(xué)習(xí)使用 keil 編程 軟件 、 Altium Designer 繪圖軟件以及 protues 仿真軟件的使用 ，并成功的利用 protues 來(lái)完成了仿真過(guò)程 并依據(jù)此完成了我的畢業(yè)設(shè)計(jì) 。 MAX232 工作電壓如表 41所示。因?yàn)轭l率倒數(shù)即為周期，所以可由單片機(jī)中的定時(shí)來(lái)控制方波的周期，每當(dāng)定時(shí)器計(jì)數(shù)溢出時(shí)就會(huì)產(chǎn)生中斷反應(yīng)。 GND12 34A2開(kāi)關(guān)按鈕12 34A3開(kāi)關(guān)按鈕12 34A4開(kāi)關(guān)按鈕12 34A5開(kāi)關(guān)按鈕 圖 25 按鍵電路 （ 5）電源電路 通過(guò) USB 口提供電流，再經(jīng)過(guò)兩個(gè)濾波電容過(guò)濾掉其中的交流電流，使其變成單一的直流電流。 三級(jí)程序存儲(chǔ)器鎖定 LM386N1 audio power amplifier. 貴陽(yáng)學(xué)院本科畢業(yè)論文（設(shè)計(jì)） IV 目錄 第一章 緒論 .........................................................1 第二章 系統(tǒng)硬件的設(shè)計(jì) ...............................................2 設(shè)計(jì)目的 .....................................................2 硬件電路結(jié)構(gòu) .................................................2 89C51 單片機(jī)芯片介紹 .........................................3 89C51 單片機(jī)的基本組成 .......................................3 硬件電路設(shè)計(jì) .................................................4 第三章 音樂(lè)播放器的系統(tǒng)軟件設(shè)計(jì) .....................................8 音頻脈沖產(chǎn)生的原理 ...........................................8 節(jié)拍產(chǎn)生原理與音樂(lè)頻率轉(zhuǎn)換 ...................................8 音階的實(shí)現(xiàn) ...................................................9 音頻轉(zhuǎn)換流程圖 ..............................................10 主程序設(shè)計(jì)流程 ..............................................10 第四章 系統(tǒng)調(diào)試及分析 .............................................12 硬件調(diào)試 ....................................................12 軟件調(diào)試 ....................................................13 仿真結(jié)果 ....................................................14 演示效果 ....................................................15 結(jié) 論 ..............................................................16 致 謝 .............................................................17 參考文獻(xiàn) ...........................................................18 附錄 ...............................................................19 貴陽(yáng)學(xué)院本科畢業(yè)論文（設(shè)計(jì)） 1 第一章 緒論 本設(shè)計(jì)系統(tǒng)是基于單片機(jī)控制實(shí)現(xiàn)完成音樂(lè)播放功能的設(shè)計(jì)，在現(xiàn)實(shí)生活中具有其廣泛的應(yīng)用及實(shí)際意義。并且，通過(guò)對(duì)定時(shí)器初值的設(shè)定來(lái)產(chǎn)生不同頻率的聲音，利用定時(shí) 器中斷來(lái)對(duì)音樂(lè)節(jié)拍長(zhǎng)度的控制。 本設(shè)計(jì)通過(guò)對(duì)測(cè)量放大器性能指標(biāo)的分析，明確設(shè)計(jì)原理跟設(shè)計(jì)思路，提出多個(gè)需要使用電路搭建電路的方案，并對(duì)每個(gè)方案的優(yōu)缺點(diǎn)進(jìn)行逐一系統(tǒng)地對(duì)比，最終得出此畢業(yè)設(shè)計(jì)方案。 可編程串行通道 音頻大致處于20HZ200KMH 之間。 硬件調(diào)試 本次設(shè)計(jì)在 調(diào)試單片機(jī) 89c85RD+、 LM386N1 跟 MAX232 的電路過(guò)程中也遇到了許許多多的問(wèn)題。 對(duì)該 MP3 播放器的設(shè)計(jì)的調(diào)試最主要的是對(duì)揚(yáng)聲器的輸出音樂(lè)部分的調(diào)試跟鍵盤(pán)控制和 LED 顯示部分的調(diào)試，可以按照以下順序?qū)Ω鱾€(gè)功能模塊的程序進(jìn)行調(diào)試。 在 論文的設(shè)計(jì)的過(guò)程中 ，通過(guò) 一系列的學(xué)習(xí) 使我 不斷成長(zhǎng) ， 學(xué)到了很多寶 貴的東西， 既 對(duì)以前的只是得到了系統(tǒng)的復(fù)習(xí) ，又學(xué) 得 了不少新的東西。s annual National Day for Eye Care, the China Youth Development ServiceCenter and Zhejiang Medicine, a leading listed Chinese pharmaceutical pany, jointlyannounced the kickoff of the about one month, a questionnaire piled by top eye care medical experts in China willbe distributed through multiple online partners, including , as well asthrough offline survey events held in universities, middle schools and primary schools acrossthe report will be released based on the survey statistics and analysis, and most importantly,guidelines for parents and youth on how to care for the eyes and prevent myopia — agrowing problem in China39。s team of more than 550 chefs. Many of the franchise39。s ovarian function has declined and a bilateral oviduct blockage has occurred, meaning that in vitro fertilization is her only option. So, after reducing her workload, Xiao underwent IVF treatment. Luckily, she got pregnant after just one treatment cycle, but later experienced vaginal bleeding, and rushed to the hospital. I told her to rest and carry on with the treatment (to prevent a miscarriage). As Zubin Zarthoshtimanesh, a yoga guru, demonstrated postures at a high school stadium in Dujiangyan city, Sichuan province, some 200 students sat on colorful mats watching him closely. It was part of the first IndiaChina international yoga festival in the provincial capital, Chengdu, in Southwest China, where more than 1,000 fans from home and abroad gathered for lessons from 20 leading practitioners of the ancient Indian reg