【正文】 .......................................................................................................... II 1 緒論 ........................................................................................................................................ 1 選題目的及意義 .............................................................................................................. 1 技術(shù)發(fā)展概況 .................................................................................................................. 1 論文內(nèi)容與結(jié)構(gòu) .............................................................................................................. 3 2 方案設(shè)計(jì) ................................................................................................................................ 3 方案比較與選擇 .............................................................................................................. 4 系統(tǒng)方案選擇 ........................................................................................................ 4 時(shí)鐘芯片選擇 ........................................................................................................ 4 顯示器件選擇 ........................................................................................................ 5 設(shè)計(jì)方案 ......................................................................................................................... 5 3 系統(tǒng)硬件設(shè)計(jì) ........................................................................................................................ 7 硬件電路圖 ..................................................................................................................... 7 時(shí)鐘電路 ......................................................................................................................... 7 DS1307 簡(jiǎn)介 ........................................................................................................... 7 時(shí)鐘電路 設(shè)計(jì) ........................................................................................................ 8 按鍵電路 ......................................................................................................................... 8 單片機(jī)電路 ..................................................................................................................... 9 單片機(jī)簡(jiǎn)介 ............................................................................................................ 9 單片機(jī)最小系統(tǒng)電路 .............................................................................................13 顯示電路 ........................................................................................................................14 打鈴電路 ........................................................................................................................15 4 系統(tǒng)軟件設(shè)計(jì) ...................................................................................................................... 17 軟件設(shè)計(jì)流程圖 .............................................................................................................17 讀取 DS1307時(shí)間程序設(shè)計(jì) .............................................................................................18 顯示程序設(shè)計(jì) .................................................................................................................19 按鍵設(shè)定程序設(shè)計(jì) .....................................................................................