针对众多低成本数据采集需求，采用带有片上USB控制器和D/A转换器的混合信号微处理器C8051F340，设计了一款可通过USB接口和LabVIEW图形用户界面实现与PC机联机的数据采集器，同时借助系统的SD卡存储独立实现现场长时间采集数据。该数据采集器成本低，结构简单，体积小，已成功用于工业现场。 Abstract: Aiming at the need of low cost data acquisition, a data acquisition device is designed based on C8051F340 which is a mixed-signal microcontroller and integrates USB controller and A/D controller on a chip.The data acquisition device which can combine with PC by USB interface and LabVIEW graphical user interface,can realize data acquisition. At the same time,it can be solely run a long time in virtue of SD card in field.The date aequisition device features low cost,simple structure and little sharp, and it has been used in industry field.
上传时间： 2014-05-31
上传用户：1109003457
随着 微 电 子技术的飞速发展，电子产品越来越微型化，集成化，自动化，低廉化，进而推动着其它许多产业的发展。特别进人21世纪以来，生物技术与电子技术的结合，成为高科技领域的研究热点。199()年由瑞士的Manz和Widmer首先提出的“微全分析系统”〔’〕(microto talan alysissy stems，即ptTAS)，通俗地称为“建在芯片上的实验室”(Lab on a chip)或简称芯片实验室(Lab chip)，主要组成部分为电泳芯片，同时是进样，分离和检测为一体的微型装置，其在电泳实验中的高效检测性能为生物化学分析仪器发展提供了一种借鉴。p.TAS广泛应用于生物医学、环境检测、食品卫生、科学以及国防等众多领域。目前 应 用 的大多为多通道的毛细管电泳芯片，这也是芯片发展的一个必然趋势。这不仅对电泳芯片本身的设计和制作提出了更高的要求，也对传感器和数据处理技术提出了新的挑战。考虑成本，集成度，控制能力以及可靠性方面的因素，本系统采用单片机作为实时数据处理、控制以及通讯的硬件平台。如果系统中既有实时的通信任务，同时又有其他实时任务，采用一个廉价的单片机，资源会比较紧张，不仅实现困难，结构复杂，而且效果可能不满意。而采用高性能的处理器，又浪费了其有效资源，所以本系统采用两个MCU协同工作，以并行/分布式多机的思想，构成了电泳芯 片核心的双单片机系统结构。微全 分 析 系 统 进行的多项实时任务，可以划分为以下 几个模块:①采集模块。负责对外围检验设备进行控 制以及对传送过来的信号进行采集和分析;②交互模 块。通过液晶显示，键盘扫描，以及打印等实现实验人 员对前端采集电路的交互操作;③双单片机控制和通 信模块。协调双单片机之间的数据传输和指令传输 ;④网络传输模块。其中一个单片机通过以太网发送接 收数据到上位机。本文提出一种实时多任务的双单片 机控制和通信系统[31的设计，一个MCU基于TCP /IP网络模块的实现。
上传时间： 2013-11-15
上传用户：wangdean1101
This paper presents several low-latency mixed-timing FIFO (first-in–first-out) interfaces designs that interface systems on a chip working at different speeds. The connected systems can be either synchronous or asynchronous. The designs are then adapted to work between systems with very long interconnect delays, by migrating a single-clock solution by Carloni et al. (1999, 2000, and 2001) (for “latency-insensitive” protocols) to mixed-timing domains. The new designs can be made arbitrarily robust with regard to metastability and interface operating speeds. Initial simulations for both latency and throughput are promising.
标签： mixed-timing low-latency interfaces first-out
上传时间： 2015-10-08
上传用户：dapangxie
Overview The MT7628 router-on-a-chip includes an 802.11n MAC and baseband,a 2.4 GHz radio and FEM,a 575/580MHz MIPS? 24K% CPU core,a 5-port 10/100 fast ethernet switch. The MT7628 includes everything needed to build an AP router from a single chip. The embedded high performance CPU can process advanced applications effortlessly, such as routing, security and VolP. The MT7628 also includes a selection of interfaces to support a variety of applications, such as a USB port for accessing external storage.Features· Embedded MIPS24KEc(575/580 MHz) with 64KBl-Cache and 32 KB D-Cache·2T2R 2.4 GHz with 300 Mbps PHY data rate· Legacy 802.11b/g and HT 802.11n modes·20/40 MHz channel bandwidth· Reverse Data Grant(RDG)· Maximal Ratio Combining(MRC)· Space Time Block Coding(STBC)· MCM 8 Mbytes DDR1 KGD(MT7628KN)
标签： mt7628
上传时间： 2022-07-18
上传用户：
VIP专区-嵌入式/单片机编程源码精选合集系列（8）资源包含以下内容：1. 一个免费的嵌入式操作系统..2. 南描述了如何在AT90S1200上实现轮询(polled)软件UART.3. 指南描述了一组用于SPI协议软件实现的低级程序.4. 指南描述了如何实现小型且高速的中断驱动步进马达控制器.5. P89CXX编程器控制CPU接收和控制程序.6. HT1380实时时钟驱动程序.7. 一个hdlc的接受模块代码.8. 一个hdlc发送模块的编码.9. 基于TI公司tms320c6711 dsk板的一个图像处理的小程序。.10. We intend to develop a wifi enabled p2p file sharing system on a linux platform using jxta and java..11. 又一flash文件系统.12. gprs协议实现.13. microchip 得协议栈.14. cs8900网络芯片驱动 for lwip.15. isd4003参考程序.16. 《嵌入式系统构件》源代码.17. usb51s_v0.4源代码.18. u盘mp3文件系统源代码.19. 51CPU快速crc检验.20. Flash文件系统.21. 声音均衡器的源代码程序.22. 液晶程序.23. 将bin文件转换成hex文件.24. M68K的内存结构分析.25. 这是c语言写的中断的例子.26. wdm格式的驱动例子代码1.27. wdm格式的驱动例子代码2.28. wdm格式的驱动例子代码3.29. wdm格式的驱动例子代码.30. MPC860的SCC1配置以太网示例代码.31. MPC860的SCC2配置HDLC示例代码.32. MPC860的配置I2C示例代码.33. webserve1.0.34. ZooBoot.35. uboot.36. MPC860初始化QMC在HDLC模式示例.37. Intel 82559网卡驱动.38. ATMEL的ADS例子1.39. AT91M42800A-INT例子.40. AT91M42800A-LED例子.
上传时间： 2013-04-15
上传用户：eeworm
提出了一个由AT89C52单片机控制步进电机的实例。可以通过键盘输入相关数据, 并根据需要, 实时对步进电机工作方式进行设置, 具有实时性和交互性的特点。该系统可应用于步进电机控制的大多数场合。实践表明, 系统性能优于传统的步进电机控制器。关键词: 单片机; 步进电动机; 直流固态继电器; 实时控制Con trol System of Stepp ingMotor Ba sed on AT89C52 ChipM icrocomputerMENGWu2sheng, L ILiang (College of Automatization, Northwestern Polytechnical Unversity, Xipan 710072, China)ABSTRACT: A stepp ing motor control system based on AT89C52 chip microcomputer was described.The data can be inputwith keyboard, and stepp ingmotorwas controlled by these data. According to the demand, users can set the workingmodel of stepp ingmotor in real2time. This system can be widely used in stepp ing motor controlling. The p ractice showed that the performance of this system outdid the tradi tional stepp ing motor controller.KEY WORDS: Chip microcomputer; Stepp ingmotor; DCSSR; Real2time control
标签： Control System ingMot Stepp
上传时间： 2013-11-19
上传用户：leesuper
A six people s rushing replies an implement, use some s switches in toggle switch K0 ~ K5 is that ON accomplishes when rushing to reply button , nobody rush to answer, 6 numerical code circulation takes turns at demonstrating 1 ~ 6 (horse races) , who rushes to reply the numerical code stops having a ride on a horse , first, whose serial number, has simultaneous light of 6 numerical codes again afterwards the key presses down. System denies responding to, until this place is OFF batch , the wheel restoring 1 ~ 6 horse races starting time as soon as rushes to answer.
标签： implement switches rushing replies
上传时间： 2013-12-27
上传用户：l254587896
The model consists of two systems, a climate control system and an electrical system. This allows for examination of the loading effects of the climate control system on the car s electrical system.
标签： system electrical consists climate
上传时间： 2015-12-24
上传用户：zhengzg
DO-178B document The rapid license in the use of software in airbore system and equipment used on aircraft and engines
标签： equipment document software airbore
上传时间： 2016-07-18
上传用户：wfeel
This the first release of a free TCP/IP/PPP protocol stack for the uC/OS Real-Time Operating System. As a first release it s still rather rough and very much larger than desired however it is working well in an embedded product and therefore may be useful to others. Much of the code is ported from public sources including BDS Lite and KA9Q (and its derivatives) and carries copyright notices from those sources. Essentially TCP is based on KA9Q but with ideas from BSD, IP is a simple implementation supporting BSD structures, ICMP is ported from BSD, and PPP is ported from the BSD version of the distribution common to BSD, Linux, and many other systems
标签： Operating Real-Time the protocol
上传时间： 2016-09-16
上传用户：songyue1991
