【正文】 ystem development costs is in the hundred with a high accuracy, the error is small, low power consumption, faster data transfer speeds, high reliability, there is a certain development value. The tested frequency and amplitude of the system is consistent with the actual waveform. KEY WORDS waveform generator， stc89C52， lcd1602， dac0832 基于單片機(jī)的 波形發(fā)生器 的設(shè)計(jì) 目 錄 摘 要 ……………………………………………………………………………… ………… I ABSTRACT………………………………………………………………………… ……… II 1 緒 論 ………………………………………… ……… … ………………………………… 1 選題背景及意義 ........................................................................................ 1 本課題的研究現(xiàn)狀 ................................................................................ 1 選題目的及意義 .................................................................................... 2 設(shè)計(jì)的基本要求 .................................................................................... 3 2 波形發(fā)生器系統(tǒng)方案設(shè)計(jì)與論證 .................................................................. 4 總體設(shè)計(jì)方案的比較 ................................................................................ 4 子系統(tǒng)模塊方 案設(shè)計(jì) ................................................................................ 4 控制模塊方案設(shè)計(jì) ................................................................................. 5 頻率調(diào)整模塊方案設(shè)計(jì) ......................................................................... 5 幅度調(diào)整模塊方案設(shè)計(jì) ......................................................................... 6 鍵盤(pán)模塊方案設(shè)計(jì) ................................................................................. 6 顯示模塊方案設(shè)計(jì) ................................................................................. 6 D/A 轉(zhuǎn)換模塊方案設(shè)計(jì) ......................................................................... 7 放大模塊 ................................................................................................. 8 系統(tǒng)總體框圖 .............................................................................................. 9 波形產(chǎn)生相關(guān)理論 ................................................................................. 11 單片機(jī)軟件開(kāi)發(fā)系統(tǒng) ............................................................................. 11 3 硬件實(shí)現(xiàn)及模塊電路設(shè)計(jì) .............................................................................. 12 單片機(jī)最小系統(tǒng)的設(shè)計(jì) ......................................................................... 12 波形產(chǎn)生及濾波放大模塊設(shè)計(jì) .......................................................... 13 頻率調(diào)整模塊 ........................................................................................... 13 基于單片機(jī)的 波形發(fā)生器 的設(shè)計(jì) 幅度調(diào)整模塊 ........................................................................................... 14 LCD1602 顯示模塊 ................................................................................. 15 RS232 串行通信電路及電源供電電路 ............................................. 15 RS232 串行通信電路 ......................................................................... 20 電源供電電路 ...................................................................................... 16 4 系統(tǒng)軟件設(shè)計(jì) ..................................................................................................... 17 系統(tǒng)軟件編程語(yǔ)言方案設(shè)計(jì) ................................................................ 17 系統(tǒng)整體軟件設(shè)計(jì)思想 ......................................................................... 18 各個(gè)子程序模塊流程圖 ......................................................................... 18 主程序流程圖 ....................................................................................... 18 頻率調(diào)整子程序 ................................................................................... 19 顯示子程序流程圖 ............................................................................... 20 各波形產(chǎn)生子程序 ............................................................................... 21 5 系統(tǒng)軟硬件調(diào)試與數(shù)據(jù)處理 ......................................................................... 26 軟件仿真及 軟件 程序調(diào)試 .................................................................... 26 軟件仿真 .............................................................................................. 26 程序調(diào)試 .............................................................................................. 26 硬件 PCB 制作、安裝、測(cè)試與調(diào)試 ................................................ 27 PCB 設(shè)計(jì)、制作、安裝 ...................................................................... 27 電路板 調(diào)試與檢測(cè)安全 ...................................................................... 27 供電安全 .............................................................................................. 28 PCB 電路板的電氣規(guī)則檢查與調(diào)試及電路功能測(cè)試 ................. 29 PCB 電路板的電氣規(guī)則檢查與調(diào)試 .................................................. 29 電路功能測(cè)試 ....................................................................................... 29 測(cè)試方法 .................................................................................................... 29 基于單片機(jī)的 波形發(fā)生器 的設(shè)計(jì) 測(cè)試數(shù)據(jù)分析及處理 ............................................................................. 38 系統(tǒng)功能實(shí)現(xiàn)情況 ................................................................................. 39 結(jié)論 ............................................................................................................................ 40 致謝 ............................................................................................................................ 41 參考文獻(xiàn) ................................................................................................................... 42 附錄 A 系統(tǒng)軟件部分源程序 ............................................................................ 43 附錄 B 系統(tǒng)原理圖 .......................................................................................... 56 附錄 C 系統(tǒng) PCB 圖 ............................................................................................ 57 附錄 D 元器件清單 ..........................................................................................