【正文】 on of wireless electronic billboard, Wireless electronic billboard manufacture process were introduced in this paper the system design, chip selection, circuit principle and software design principle. With the development of the society, ordinary electronic billboard has been difficult to meet people now use requirements. The significance of this design mainly is to break the traditional way of cable transmission, to transmit data in wireless way greatly increases the electronic billboard use of the easy degree, improve the product market petition ability. 【 Key words】 MCU Micro Controller Line drive Column driver LED 重慶郵電大學(xué)本科畢業(yè)設(shè)計(jì)（論文） III 目 錄 前 言 .................................................................................................................................................. 1 第一章 LED 電子廣告牌的概述 ....................................................................................................... 2 第一節(jié) LED 電子廣告牌的歷史 ..................................................................................................... 2 第二節(jié) LED 電子廣告牌的主要特點(diǎn) ........................................................................................... 2 第三節(jié) LED 電子廣告牌使用現(xiàn)狀 ............................................................................................... 3 第四節(jié) LED 電子廣告牌的發(fā)展趨勢(shì) ........................................................................................... 4 第五節(jié) 本設(shè)計(jì)的意義 .................................................................................................................... 4 第六節(jié) 本章小結(jié) ............................................................................................................................ 5 第二章 系統(tǒng)整體設(shè)計(jì)思路 ................................................................................................................ 6 第一節(jié) 系統(tǒng)方案 ............................................................................................................................ 6 第二節(jié) 方案選擇 ............................................................................................................................ 7 一、最小系的統(tǒng)設(shè)計(jì) .................................................................................................................. 7 二、顯示模塊的設(shè)計(jì) .................................................................................................................. 9 三、無線模塊的設(shè)計(jì) ................................................................................................................ 11 第三節(jié) 本章小結(jié) .......................................................................................................................... 13 第三章 硬件設(shè)計(jì) .............................................................................................................................. 14 第一節(jié) 最小系統(tǒng)電路設(shè)計(jì) .......................................................................................................... 14 一、復(fù)位電路 ............................................................................................................................ 15 二、電源電路 ............................................................................................................................ 16 三、晶振電路 ............................................................................................................................ 16 四、 I/O 口連接電路 ................................................................................................................. 17 第二節(jié) 顯示模塊 .......................................................................................................................... 18 一、 LED 點(diǎn)陣模塊 ................................................................................................................... 20 二、行驅(qū)動(dòng)模塊 ........................................................................................................................ 21 三、列驅(qū)動(dòng)模塊 ........................................................................................................................ 22 第三節(jié) 無線模塊 .......................................................................................................................... 23 一、無線模塊電源電路 ............................................................................................................ 23 二、無線控制核心 .................................................................................................................... 24 第四節(jié) 本章小結(jié) .......................................................................................................................... 25 第四章 軟件設(shè)計(jì) .............................................................................................................................. 26 重慶郵電大學(xué)本科畢業(yè)設(shè)計(jì)（論文） IV 第一節(jié) 開發(fā)軟件介紹 .................................................................................................................. 26 一、 Keil C51 開發(fā)系統(tǒng)概述 .................................................................................................... 26 二、 Keil C51 開發(fā)系統(tǒng)整體構(gòu)架 ............................................................................................ 26 三、取字模軟件的介紹 ............................................................................................................ 26 第二節(jié) 軟件流程 .......................................................................................................................... 27 一、整體程序設(shè)計(jì) .................................................................................................................... 27 二、子程序設(shè)計(jì) ........................................................................................................................ 27 第三節(jié) 本章小結(jié) .......................................................................................................................... 29 第五章 系統(tǒng)測(cè)試試及問題分析 ...................................................................................................... 30 第一節(jié) 硬件調(diào)試 ..............................................................