【正文】 ....................................................................... 2 論文主要內(nèi)容 ....................................................................................................................... 2 2 系統(tǒng)總體方案 ............................................................................................................................. 4 系統(tǒng)總體方案 ....................................................................................................................... 4 系統(tǒng)硬件方案選擇 ............................................................................................................... 4 上位機(jī)部分選擇 ......................................................................................................... 4 通信部分方案選擇 ..................................................................................................... 5 控制部分方案選擇 ..................................................................................................... 5 顯示部分方案選擇 ..................................................................................................... 6 功能要求 ............................................................................................................................... 7 系統(tǒng) 總 結(jié)構(gòu) ........................................................................................................................... 8 最終確定硬件設(shè)計(jì)方案 ............................................................................................. 8 3 系統(tǒng)硬件設(shè)計(jì) .............................................................................................................................. 9 硬件整體設(shè)計(jì)概述及功能分析 ........................................................................................... 9 控制單元設(shè)計(jì) ..................................................................................................................... 10 單片機(jī)最小 系統(tǒng)設(shè)計(jì) ............................................................................................... 10 STC89C52RC 簡介 .................................................................................................... 10 LED 點(diǎn)陣顯示設(shè)計(jì) ........................................................................................................... 12 列 驅(qū)動單元設(shè)計(jì) ................................................................................................................. 13 列 驅(qū)動系統(tǒng)設(shè)計(jì) ....................................................................................................... 13 74HC138 簡介 ........................................................................................................ 14 行 驅(qū)動單元設(shè)計(jì) ................................................................................................................. 15 行 驅(qū)動 74HC595 ...................................................................................................... 15 74HC595 簡介 ........................................................................................................ 16 V 硬件顯示仿真 ..................................................................................................................... 17 單片機(jī) ISP 下載編程器 ...................................................................................................... 19 4 系統(tǒng)調(diào)試 ..................................................................................................................................... 21 系統(tǒng)硬件部分調(diào)試方法 ..................................................................................................... 21 短路與虛焊檢測 ....................................................................................................... 21 上電測試 ................................................................................................................... 21 系統(tǒng)聯(lián)合調(diào)試及結(jié)果 ......................................................................................................... 22 調(diào)試結(jié)果分析 ..................................................................................................................... 22 5 結(jié)論 .............................................................................................................................................. 23 參考文獻(xiàn) ......................................................................................................................................... 24 致謝 ................................................................................................................................................... 25 附錄 ................................................................................................................................................... 26 附錄 A 硬件原理圖 ................................................................................................................... 26 附錄 B 仿真程序 ....................................................................................................................... 27 附錄 C 設(shè)計(jì)源程序 ................................................................................................................... 29 附錄 D 實(shí)物圖 ........................................................................................................................... 36 1 1 引 言 LED 點(diǎn)陣顯示屏以 亮度高、工作電壓低、功 耗小、小型化、壽命長、耐沖擊和性能穩(wěn)定的優(yōu)點(diǎn) 迅速成長為平板顯示的主流產(chǎn)品，在信息顯示領(lǐng)域得到了廣泛的應(yīng)用。 針對上述要求，經(jīng)過考慮，我們構(gòu)思出具有自身特色的單片機(jī)點(diǎn)陣 LED電子顯示屏設(shè)計(jì)主要內(nèi)容為： （ 1）單片機(jī)最小系統(tǒng)模塊：整個控制系統(tǒng)都是依靠單片機(jī)完成。 lattice LED’s panel display III 設(shè)計(jì)說明 單片機(jī)點(diǎn)陣 LED電子顯示屏 設(shè)計(jì)是在指導(dǎo)老師給出的任務(wù)書并在其指導(dǎo)下完成的。本文介紹了一款以單片機(jī)STC89C52RC 為制器的 LED 點(diǎn)陣顯示屏系統(tǒng)的設(shè)計(jì)。 LED 行業(yè)已成為一個快速發(fā)展的新興產(chǎn)業(yè)，市場空間巨大，前景廣闊。 關(guān)鍵字 ： 單片機(jī) ； LED點(diǎn)陣顯示 II Abstract Nowadays, more and more places need to use LED dot matrix to display Chinese characters and graphics, such as the large shopping malls, railway statI/Ons, docks, subway statI/Ons , varI/Ous kinds of service window and so on .