【正文】 Abstract Along with the rapid development of microelectronics and munication technology,the specialization and miniaturization of puter system has be a new systems technology as the key of this trend,its product has infiltrated into the industrial control and the social life at all levels,and plays a more important role in the information evolution. ARM processor is famous for its less cost ,low power and good performance in numerous embedded is well know for his open sources,stabilization,customization,mobility,multitudious hardware supported and powerfull work it made popularity that using ARM+Linux solution in embedded system designing. This thesis intends to build an embedded hardware and software developing platform based on ARM9 processor and Linux,and offers the solution which can extend some functional modules easily to the user. It was divided into hardware platform and software system in this of all,we describes the embedded print terminal design concept (including the working principle,design and choise),then we summarized the devising of hardware and software also introduction SAMSUNG’s S3C2410 SoC,the ARM9 core 32bit RISC processor,and focused on the circuit connecting design,the printer deriver and the main application development in Linux baded on this platform. The core codes were also analyzed at each step. At the end of this paper,we summed up our work and suggested some improvement. Key words： S3C2410； embedded system； Linux； Printer driver； Application 南華大學(xué)電氣工程學(xué)院課程設(shè)計(jì) 目 錄 1 緒論 ............................................................................................................................ 1 課題來源及其意義 .......................................................................................... 1 嵌入式系統(tǒng)的定義及特點(diǎn) .............................................................................. 1 嵌入式系統(tǒng)的定義 ................................................................................ 2 嵌入式系統(tǒng)的特點(diǎn) ................................................................................ 2 嵌入式系統(tǒng)的現(xiàn)狀和發(fā)展趨勢(shì) ...................................................................... 3 嵌入式系統(tǒng)的現(xiàn)狀 ................................................................................ 3 嵌入式系統(tǒng)的發(fā)展趨勢(shì) ........................................................................ 3 嵌入式打印技術(shù)簡介 ...................................................................................... 4 本設(shè)計(jì)的主要內(nèi)容 .......................................................................................... 4 2 嵌入式打印終端系統(tǒng)的設(shè)計(jì)概念 ............................................................................ 5 嵌入式打印終端系統(tǒng)的組成及原理 .............................................................. 5 嵌入式打印終端系統(tǒng)設(shè)計(jì)方案 ...................................................................... 5 嵌入式處理器平臺(tái)的選擇 .................................................................... 5 嵌入式操作系統(tǒng)的選擇 ........................................................................ 6 嵌入式打印終端系統(tǒng)設(shè)計(jì)方案 ............................................................ 6 嵌入式系統(tǒng)設(shè)計(jì)流程 .................................................................................... 7 3 系統(tǒng)硬件設(shè)計(jì) .......................................................................................................... 7 硬件開發(fā)平臺(tái) S3C2410 介紹以及結(jié)構(gòu) ......................................................... 8 存儲(chǔ)器 ............................................................................................................ 11 串行接口 ........................................................................................................ 11 打印機(jī)與開發(fā)板接口電路的設(shè)計(jì)（ I/O PORTS） ..................................... 12 4 嵌入式 Linux 平臺(tái)構(gòu)建 .......................................................................................... 14 建立交叉編譯環(huán)境 ........................................................................................ 14 配置 BootLoader............................................................................................ 15 BootLoader 概述 ................................................................................... 15 Uboot ................................................................................................... 15 南華大學(xué)電氣工程學(xué)院課程設(shè)計(jì) 嵌入式 Linux 內(nèi)核移植 ................................................................................ 16 安裝根文件系統(tǒng) ............................................................................................ 16 創(chuàng)建根文件系統(tǒng)的基本目錄結(jié)構(gòu) ...................................................... 16 構(gòu)建 BusyBox ...................................................................................... 17 5 嵌入式打印終端系統(tǒng)的軟件設(shè)計(jì) .......................................................................... 19 微型打印機(jī)驅(qū)動(dòng)的設(shè)計(jì) ................................................................................ 19 Linux 設(shè)備驅(qū)動(dòng) .................................................................................... 19 打印驅(qū)動(dòng)的實(shí)現(xiàn) .................................................................................. 19 串口的設(shè)置與讀寫 ........................................................................................ 20 串口的設(shè)置 .......................................................................................... 20 編寫讀取掃描儀數(shù)據(jù)函數(shù) .................................................................. 21 客戶端和服務(wù)器的 socket 編寫 ..............................