【正文】 ..........................3 設計目的 ..............................................................................................................................................3 設計任務 ..............................................................................................................................................3 第二章 課題背景 ...........................................................................................................................................5 單片機發(fā)展現(xiàn)狀 ..................................................................................................................................5 計算器發(fā)展現(xiàn)狀 ..................................................................................................................................5 單片機簡介 ..........................................................................................................................................5 矩陣鍵盤 ..............................................................................................................................................7 計算器設計思路 ..................................................................................................................................7 第三章 硬件系統(tǒng)設計 ...................................................................................................................................9 鍵盤接口電路 ......................................................................................................................................9 LED 顯示模塊 ................................................................................................................................... 10 運算模塊 ........................................................................................................................................... 10 第四章 軟件設計 ........................................................................................................................................ 12 C 語言的特點 .................................................................................................................................... 12 鍵盤掃描程序設計 .......................................................................................................................... 12 算術運算程序設計 .......................................................................................................................... 13 顯示程序設計 ................................................................................................................................... 14 第五章 系統(tǒng)調試與存在的問題 ............................................................................................................... 15 軟件調試 ........................................................................................................................................... 15 硬件調試 ........................................................................................................................................... 15 總 結 ............................................................................................................................................................. 16 參考文獻 ...................................................................................................................................................... 17 附錄一 C 語言源程序 ................................................................................................................................. 18 主函數(shù)： .............