SPCE061A單片波形發(fā)生器的畢業(yè)設(shè)計


本文共計43頁，9468字；

摘 要
信號發(fā)生器在教學(xué)、試驗、測控等各個領(lǐng)域都有著十分廣泛的應(yīng)用，而且隨著現(xiàn)代電子通訊技術(shù)的發(fā)展, 常常需要高精度且頻率可方便調(diào)節(jié)的信號發(fā)生器。它的實現(xiàn)方法通常有以下幾種：
（1）用分立元件組成的函數(shù)發(fā)生器：通常是單函數(shù)發(fā)生器且頻率不高，其工作不很穩(wěn)定，不易調(diào)試。　　
（2）用集成芯片的函數(shù)發(fā)生器：可達到較高的頻率和產(chǎn)生多種波形信號，但電路較為復(fù)雜且不易調(diào)試。
（3）利用單片集成芯片的函數(shù)發(fā)生器：能產(chǎn)生多種波形，達到較高的頻率，且易于調(diào)試。
（4）利用專用直接數(shù)字合成ＤＤＳ芯片的函數(shù)發(fā)生器：能產(chǎn)生任意波形并達到很高的頻率。但成本較高。
本設(shè)計直接采用凌陽SPCE061A單片機作為波形發(fā)生器,加上巧妙的軟件設(shè)計和簡易的外圍電路,產(chǎn)生頻率、幅度可調(diào)的正弦波、三角波、鋸齒波以及方波等多種信號.信號的頻率、幅值，通過鍵盤直接輸入，并由LED顯示,同時還可實現(xiàn)語音播放功能。與現(xiàn)有各類型波形發(fā)生器比較而言，產(chǎn)生的數(shù)字信號干擾小，輸出穩(wěn)定，可靠性高，特別是操作簡單方便，人機界面友好，成本低，非常適合于物理實驗室教學(xué)與實驗使用。
關(guān)鍵詞： SPCE061A單片機,波形發(fā)生器,LED顯示, 語音播報
Summary
The signal occurrence machine is in the teaching, experiment, measure to control the etc., each realms all have the very extensive application, and along with technical development of modern electronics communication, usually need high accuracy and frequency can the signal occurrence machine that convenience regulate.It carries out the method to usually have following several kindses:
(1)Use the cent signs the function that component constitute occurrence machine:Is usually the single function occurrence machine and frequencies not high, it work not settled, adjust to try not easily.
目 錄
摘要..................................................................................................1
Summary.......................................................................................... 2
一、方案設(shè)計與論證.......................................................................4
方案(一).............................................................................................4
方案(二).............................................................................................5
方案比較............................................................................................7
二、凌陽SPCE061A單片機概述..................................................... 7
三、系統(tǒng)硬件電路設(shè)計..................................................................... 8
3.1電路方框圖及說明....................................................................... 8
3.2各部分電路設(shè)計........................................................................... 9
3.2. 1濾波、放大及其電流到電壓的轉(zhuǎn)換電路............................... 9
3.2.2鍵盤控制電路............................................................................ 10
3.2.3顯示電路..................................................................................... 11
3.2.4語音播報電路的設(shè)計................................................................. 12
四、軟件設(shè)計...................................................................................... 13
4.1主程序流程圖................................................................................ 15
4.2分塊程序流程................................................................................ 16
4.2. 1按鍵控制部份............................................................................ 16
4.2.2波形發(fā)生部分............................................................................. 16
五、系統(tǒng)測試及整機指標(biāo)...................................................................19
波形形成程序部分.............................................................................. 21
總結(jié)..................................................................................................... 37
附錄………………………………………………………………… 38
一 算術(shù)邏輯運算單元ALU............................................................... 38
二SPCE061A 片內(nèi)存儲器結(jié)構(gòu)..........................................................39
三 I/O口.............................................................................................. 39
四 系統(tǒng)時鐘........................................................................................ 41
五 DAC 方式音頻輸出......................................................................42