基于單片機的數(shù)字函數(shù)發(fā)生器的設計

電子機電論文編號:JD902     字數(shù):8017,頁數(shù):26

目錄
引 言 1
1 方案的認證與選擇 2
1.1 總體方案論證與選擇 2
2單片機系統(tǒng)工作原理 4
2.1 AT89C51部分 4
2.2 DAC0832部分 8
2.3 運算放大器部分 11
2.4 系統(tǒng)完整的電路 12
3 系統(tǒng)的軟件設計 13
3.1 主程序流程圖 13
3.2 讀寫AT89C51程序產(chǎn)生波形 13
3.3 DAC0832轉(zhuǎn)換信號 14
4 系統(tǒng)的電腦仿真 15
4.1系統(tǒng)的仿真波形圖 15
5電路的實物制作部分 16
5.1 電路的調(diào)試 16
5.2 焊接PCB板 16
5.3實物的測試以及部分參數(shù)的測定 17
小結(jié) 17
參考文獻 18
附錄 19
謝辭 23

摘要：本論文介紹了數(shù)字函數(shù)發(fā)生器的工作原理和硬件的設計以及系統(tǒng)的設計。硬件部分主要由AT89C51單片機、DAC0832數(shù)/模轉(zhuǎn)換器、放大器和其他輔助電路組成。系統(tǒng)的原理是：單片機通過程序讀取數(shù)據(jù)調(diào)出所要的波形代碼，經(jīng)過DAC0832數(shù)/模轉(zhuǎn)換器將單片機輸出的數(shù)字信號轉(zhuǎn)換成為模擬信號后，再由放大器將信號放大輸出在示波器上顯示。軟件部分的編程語言采用了51單片機匯編語言。系統(tǒng)用比較簡單的硬件實現(xiàn)了數(shù)字函數(shù)信號的選擇輸出顯示功能。具有顯示波形清晰、穩(wěn)定，可靠性高，原理簡單、使用簡單,一定的實用性等優(yōu)點。
關(guān)鍵詞：數(shù)字函數(shù)發(fā)生器；DAC0832；51單片機；波形；示波器顯示

The design of the digital function generator based on single-chip
Abstract：The article introduce the working principle of digital function generator and the design of hardware and system .The part of hardware make up of AT89C51 single chip , DAC0832 D / A converters, amplifiers and other auxiliary circuit. The principle of the system are in this aspects: The single-chip transfer the waveform code by read the data through the procedure, and the DAC0832 D / A converter the digital signal into an analog signal from the output of the single-chip, then show the signal amplification in the oscilloscope from the amplifier output. The part of the software programming language used the 51 single-chip assembly language. The system implement the digital signal function of the choice of output display with relatively simple hardware, include the advantage of a clearly, stability, reliable waveform display with, simply, simply to use, a certain degree of practicality.
Key words: digital function generator; DAC0832; 51 single-chip; wave; oscilloscope display