【正文】 畢業(yè)論文i西安培華學院畢業(yè)論文單片機輸入接口擴展系統(tǒng)設計與實現(xiàn)目錄目錄 ...............................................................................................................................................................................I摘要 .............................................................................................................................................................................II一、單片機的發(fā)展及應用 ..........................................................................................................................................1 單片機的發(fā)展 ...................................................................................................................................................1 單片機的應用 ...................................................................................................................................................2二、計算器 ..................................................................................................................................................................3 計算器意義 .......................................................................................................................................................3 軟硬件環(huán)境要求 ...............................................................................................................................................3 AT89S51 單片機概述 ........................................................................................................................................3三、計算器基本功能與設計 ......................................................................................................................................5 計算機器基本實現(xiàn)功能 ....................................................................................................................................5 電路原理圖 .......................................................................................................................................................5 設計方法和實現(xiàn)方法 .......................................................................................................................................5四、計算器模塊設計 ..................................................................................................................................................5 輸入模塊：鍵盤掃描 ........................................................................................................................................5 運算模塊：單片機控制 ....................................................................................................................................5 顯示模塊：LED 顯示 .......................................................................................................................................5五、硬件電路設計 ......................................................................................................................................................5 主要器件 ............................................................................................................................................................5 功能和操作 ........................................................................................................................................................5 硬件調(diào)試 ............................................................................................................................................................5 常見故障： ................................................................................................................................................5 調(diào)試方法： ..............................................................................................................................