【正文】 目 錄 1 需求分析 ...............................................................................................................................................................1 開(kāi)發(fā)背景 ....................................................................................................................................................... 1 課程設(shè)計(jì)目的 .............................................................................................................................................. 1 課程設(shè)計(jì)要求 .............................................................................................................................................. 1 資源配置 ....................................................................................................................................................... 1 開(kāi)發(fā)環(huán)境介紹 .............................................................................................................................................. 1 2 概要設(shè)計(jì) ...............................................................................................................................................................2 硬件介紹 ....................................................................................................................................................... 2 可編程并行接口 8255A....................................................................................................................2 發(fā)光二極管 LED .................................................................................................................................4 低電壓音頻功率放大器 LM386 ......................................................................................................4 74 LS04 ...............................................................................................................................................5 LM336 ...............................................................................................................5 實(shí)現(xiàn)原理 ....................................................................................................................................................... 6 設(shè)計(jì)步驟 ....................................................................................................................................................... 6 3 詳細(xì)設(shè)計(jì) ...............................................................................................................................................................7 繪制電路圖 .................................................................................................................................................. 7 電路原理圖 .........................................................................................................................................7 電路 PCB 圖 .........................................................................................................................................7 搭建電路板 .................................................................................................................................................. 8 元器件清單 .........................................................................................................................................8 硬件連線(xiàn) .............................................................................................................................................8 流程圖 ........................................................................................................................................................... 9 程序設(shè)計(jì) ..................................................................................................................................................... 10 4 調(diào)試與操作說(shuō)明 ................................................................................................................................................11 調(diào)試要求 ..................................................................................................................................................... 11 調(diào)試與操作 .............................................................................................