S3c2440触摸屏毕业设计.doc

摘 要 根据IEEE（电气和电子工程师协会）的定义，嵌入式系统是控制、监视或者辅助装置、机器和设备运行的装置（devices used to control, monitor, or assist the operation of equipment, machinery or plants）。从中可以看出嵌入式系统是软件和硬件的综合体，还可以涵盖机械等附属装置。目前国内一个普遍被认同的定义是：以应用为中心、以计算机技术为基础、软件硬件可裁剪、适应应用系统对功能、可靠性、成本、体积、功耗严格要求的专用计算机系统。随着信息化，智能化，网络化的发展，嵌入式系统的广泛应用已经渗入到我们日常生活的各个方面。在手机、MP3、MP4、PDA、数码相机、电视机，甚至电饭锅、手表里都有嵌入式系统的身影，工业自动化控制、仪器仪表、汽车、航空航天等领域更是嵌入式系统的天下。据统计：每年全球嵌入式系统带来的相关工业产值已经超过1万亿美元。随着多功能手机、便携式多媒体播放机、数码相机、HDTV和机顶盒等新兴产品逐渐获得市场的认可，嵌入式系统的市场正在以每年30%的速度递增。Abstract According to the definition by IEEE(Institute of Electrical and Electronic Engineers)，embedded system refers to a kind of device that used to control, monitor, or assist the operation of equipment, machinery and device.It shows that the embedded system is a complex of the software and hardware，it can contain accessory devices like machinery and so on.At present, domestic a generally recognized definition in domestic is that a special computer system that centered on application and based on computer technology, in which both the software and hardware can be cutting, and also fit some strict demands of the application system on the aspect of function, reliability, cost, volume, power consumption. Along with the development of informatization, intellectualization and networked, the embedded system has widely applied in every aspect of our daily life. It can be applied in mobile phones, MP3, MP4, PDA, digital camera, television, and even electric cooker and watches, and also it is mostly applied to such field as Industrial automation control, instrumentation, automotive, aerospace. According to statistics, the related industrial output brought by the embedded system has more than $1 trillion annually all around the world. As the multifunctional cell phone, portable multimedia player, digital camera, HDTV and set-top boxes and other emerging products are gradually popular in the market, the requirement of embedded system is increasing at an rate of 30% annually. The design in this ar