【正文】 .........................1 課題研究的內(nèi)容 ...........................................................................................................2 2 LED 顯示屏的介紹及顯示原理 ......................................................................................3 LED 顯示屏概述 ...........................................................................................................3 LED 顯示屏顯示原理及驅(qū)動(dòng)方式 ...............................................................................4 LED 顯示屏顯示原理 ................................................................................................4 LED 顯示屏驅(qū)動(dòng)方式 ................................................................................................5 LED 顯示屏單元板結(jié)構(gòu)及其電路介紹 .......................................................................6 LED 顯示屏單元板的基本結(jié)構(gòu) ................................................................................6 LED 單元板上的元件及其電路介紹 ........................................................................7 3 系統(tǒng)的方案設(shè)計(jì) ..............................................................................................................9 設(shè)計(jì)內(nèi)容及要求 ...........................................................................................................9 系統(tǒng)總體設(shè)計(jì) ...............................................................................................................9 方案設(shè)計(jì) .....................................................................................................................10 主控制器方案選擇 ..................................................................................................10 通訊方案選擇 ..........................................................................................................12 存儲(chǔ)方案選擇 ..........................................................................................................13 數(shù)據(jù)輸出方案選擇 ..................................................................................................14 漢字字模生成方案選擇 ..........................................................................................15 單片機(jī)軟件系統(tǒng)開(kāi)發(fā)環(huán)境選擇 .................................................................................15 單片機(jī)軟件開(kāi)發(fā)語(yǔ)言的選擇 ..................................................................................15 單片機(jī)集成開(kāi)發(fā)環(huán)境的選擇 ..................................................................................16 上位機(jī)軟件開(kāi)發(fā)環(huán)境選擇 .........................................................................................16 硬件系統(tǒng)的開(kāi)發(fā)環(huán)境選擇 .........................................................................................17 4 硬件設(shè)計(jì)與實(shí)現(xiàn) ............................................................................................................18 系統(tǒng)硬件功能分析 .....................................................................................................18 系統(tǒng)硬件總體設(shè)計(jì) .....................................................................................................18 系統(tǒng)硬件各功能模塊設(shè)計(jì) .........................................................................................18 單片機(jī)最小系統(tǒng)設(shè)計(jì) ..............................................................................................18 RS232C 通訊電路設(shè)計(jì) .........................................................................................20 SD 卡接口電路設(shè)計(jì) .................................................................................................20 并轉(zhuǎn)串?dāng)?shù)據(jù)輸出電路設(shè)計(jì) ......................................................................................21 基于 AVR 單片機(jī)的雙色 LED 顯示屏控制系統(tǒng)設(shè)計(jì) 4 信號(hào)驅(qū)動(dòng)電路設(shè)計(jì) ..................................................................................................22 功能按鍵電路設(shè)計(jì) ..................................................................................................23 系統(tǒng)硬件電路設(shè)計(jì) .....................................................................................................23 原理圖的繪制 ..........................................................................................................23 PCB 板的繪制 ..........................................................................................................24 5 系統(tǒng)單片機(jī)軟件設(shè)計(jì) ....................................................................................................26 系統(tǒng)單片機(jī)軟件功能分析及總體設(shè)計(jì) .....................................................................26 系統(tǒng)單片機(jī)軟件各功能模塊軟件設(shè)計(jì) .....................................................................27 系統(tǒng)初始化軟件設(shè)計(jì) ..............................................................................................27 串口通訊模塊軟件設(shè)計(jì) ..........................................................................................28 SD 卡讀寫(xiě)模塊軟件設(shè)計(jì) .........................................................................................28 數(shù)據(jù)發(fā)送模塊軟件設(shè)計(jì) ..........................................................................................31 靜態(tài)顯示及動(dòng)態(tài)顯示模塊軟件設(shè)計(jì) ......................................................................31 6 系統(tǒng)上位機(jī)軟件設(shè)計(jì) ....................................................................................................33 系統(tǒng)上位機(jī)軟件功能分析 .........................................................................................33 系統(tǒng)上位機(jī)軟件設(shè)計(jì) .................................................................................................33 控件布局設(shè)計(jì) ..........................................................................................................33 串口收發(fā)程序設(shè)計(jì) ..................................................................................................34 取圖片點(diǎn)陣信息算法設(shè)計(jì) ......................................................................................34 向 SD 卡存 入文件程序設(shè)計(jì) ...................................................................................34 7 系統(tǒng)軟硬件的調(diào)試與測(cè)試 ............................................................................................35 軟件調(diào)試與測(cè)試 .........................................................................................................35 系統(tǒng)上位機(jī)軟件調(diào)試 ...................