The device is so powerful that it can perform primary control in double-start positioning system . then we analyze the key technologies both hardware driver divice and software development in the embedded system design . the most important program run on the cpu is real time operation system ( rtos ) 实时操作系统(rtos)是嵌入式软件的核心部分,对于该系统我们选择了lynuxworks公司的bluecatlinux,完成在评估板的ep7312微处理器上进行系统的安装、实现文件系统、外设的驱动、图形用户接口(gui)及其他应用程序软件的设计。
With chip web server, embedded system can be monitored via ethernet, which can be used in remote measurement . for example, in our system, chip web server is used in conductivity measurement . remote file transport is very usful in embedded system design and debug, and its application is described in detail in section 4 在嵌入式系统中实现webserver,用户就能在任意一台联网的计算机上,通过浏览器访问我们的系统,这就使远程监控、网络测量成为现实,我们已将其应用在基于双频测导法的电导率测量中。
The research area covered by the thesis includes embedded system design, hardware infrastructure of embedded gis system, architecture of nand flash, error detect code / error check code and there algorithm, journal file system, gis file index, wear leveling for nand flash, file system page cache and write delay, dynamic compression in file system etc . first, the thesis first analysis the embedded gis status in quo, technology background, difficulty it facing 本文研究领域涉及嵌入式系统开发、嵌入式gis系统软硬件框架、nand芯片体系结构、差错检测差错校验(edcecc)算法、日志文件系统、文件索引、芯片擦写平衡、文件系统页面cache与延迟写技术、文件系统实时压缩等技术。
Embedded intelligent instrument systems are some measuring and controlling instrument systems which are designed according to the embedded system design principle, and the basic embedded instrument system discussed in this paper is a platform that we developed as a kernel part of embedded instrument systems, esp . portable instruments and networking instruments . the platform uses motorola " s mc68ez328 as its mpu, the peripheral circuit includes network interface, serial interface, lcd display, keyboard, etc . and its embedded operating system is uclinux, thus it has ability of network communication and interactive function between the user and the platform, and it can be extended easily to portable instruments or networking instruments with certain purpose 嵌入式智能仪器系统是根据嵌入式系统设计原理构建的测控仪器系统,本文讨论的嵌入式智能仪器基本系统是我们自行研制开发的可以用作各种嵌入式智能仪器特别是手持式仪器和网络化仪器的核心部件,它采用motorola公司的mc68ez328作为mpu(微处理器),并配有网络接口、串行接口、lcd显示、键盘控制等外围电路,采用uclinux为嵌入式操作系统,具有串行通信、网络通信及人机交互等功能,可方便地扩展为针对各种具体应用的手持式仪器和网络化仪器。
embedded systems designed for specific processors are heavily dependent on the underlying hardware . since most hardware deices on the embedded system development board are predetermined, it presents a great challenge for the embedded system programming process . furthermore, the lack of software support for embedded systems makes debugging the program code more difficult 嵌入式系统是与硬件密切相关的系统,主要针对特定的处理器,同时许多嵌入式系统的硬件板卡已经固化,这就给嵌入式系统编程带来很大的困难;同时嵌入式系统软件支持比较少,调试也比较困难。
The system, which is composed of remote monitoring devices, gsm communication system and monitoring center, is a compositive subject of technology of teletransmitting, information, health care and embedded system design . in the remote transmitting system for physiological signals those abnormal physiological signals, after being inspected and analysed, will be sent to monitoring center by gsm 该系统融合了远程通信技术、信息学技术、医疗保健技术和嵌入式系统设计技术,由远端监测设备、gsm通信系统及监护中心组成,主要实现生理参数实时采集、处理、控制、传输和辅助诊断功能。
Nowadays, embedded system application is more and more complicated, and embedded softerware acts a more important role than ever, design and implementation of embedded software has become a restrict factor of embedded system design and exploitation, a good software architecture and suitable design method is vital to the success of the system design 随着嵌入式系统应用复杂性的不断提高,嵌入式软件在系统中所占的比重不断增加,软件开发已经成为开发嵌入式系统的重要制约因素,良好的软件体系结构和合适的开发方法,对于系统开发的成功具有重大的意义。