介绍基于ISA总线与KH-9300的数据采集板卡的设置,详细说明8254定时计数器及8259中断控制器的结构特点、工作方式、控制字等,探讨中断类型、中断处理程序、中断矢量表及其填写。重点讲述使用TorboC编写中断服务程序的方法,应注意的主要问题及程序测试的结果。 Abstract: The settings of KH-9300 data acquisition board based on the ISA bus is introduced,the structural characteristics,working methods,control characters of the timing counter 8254 and interruptioncontroller 8259 are explained in detail.The interruption type,interrupt handling programs,interruption vector table and its filling also are discussed.Further,great emphasis is put on the method of interrupt service program compiled by Torbo C,the main issues that should be noted,and the results of program testing.
上传时间: 2013-11-14
上传用户:qq527891923
介绍一种基于C8051F060单片机和NAND Flash的数据采集存储系统,该系统可实现3路信号采样,每路采样率为5KS/s,通过异步串行通信接口实现数据传输。并详细说明系统的软件设计。 Abstract: An acquisition and storage system based on C8051F060and NAND Flash is designed in this paper.The system is used to sample three-channel of signal,5KSPS each channel,and can upload data to test bench through UART(Universal Asynchronous Receiver/Transmitter).The software design is discussed in detail.
上传时间: 2013-10-12
上传用户:Jesse_嘉伟
概述 P89C51/89C52/89C54/89C58含有非易失FLASH\并行可编程的程序存储器,所有器件都是通过引导装载器串行编程(ISP)见P89C51RC+/89C51RD+数据手册. 种系列单片机采用先进CMOS工艺的单片位微控制器,是80C51微控制器系列的派生.和80C51指令相同.
上传时间: 2013-12-26
上传用户:二十八号
TLC1543是TI公司推出的采用SPI技术的模数转换器。具有输入通道多、高速、高分辨率、性价比高、易于和单片机接口等特点,在各种数据采集系统中有着广阔的应用空间。51单片机、TLC1543加上很少的外围器件即可构成一个高性价比的数据采集系统,同时TLC1543占用单片机I/O资源较少,使得单片机有足够的I/O资源去完成如控制、显示等功能。由AT89C52和TLC1543构成的三相单独可调400Hz中频电源的数据采集系统在实际运用中达到很好的效果。
上传时间: 2013-11-17
上传用户:xg262122
气压是气象监测中的一个重要参数,提出了一种气压数据采集模块设计方案,该模块采用数字气压传感器MS5534B、MSP430单片机MSP430F2272和带实时时钟(RTC)64 KB铁电存储器。通过低功耗软件设计方法以微安级整体平均功耗实现了气压数据的采集和存储,适合电池供电的连续高精度气压采集应用。给出了模块的软硬件设计以及MS5534B的性能指标和使用经验。 Abstract: Air pressure is an important parameter in weather monitor.This paper futs forward a new design scheme of low power-air pressure data acquisition module.The module uses a digital output barometer sensor MS5534B,MSP430 microcontroller MSP430F2272 and integrated RTC 64KB FRAM,precision air pressure measurement and storage chip.Another point of this module is low power consumption, so it is well suited for battery powered air pressure data acquisition applications. At the same time,the software and hardware deign of module is presented,And the speciaties and use notices of MS5534B are given.
上传时间: 2014-12-27
上传用户:drink!
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
PCF8563 是低功耗的CMOS 实时时钟/日历芯片,它提供一个可编程时钟输出,一个中断输出和掉电检测器,所有的地址和数据通过I2C 总线接口串行传递。最大总线速度为400Kbits/s,每次读写数据后,内嵌的字地址寄存器会自动产生增量。
上传时间: 2013-10-19
上传用户:奇奇奔奔
为解决传统可视倒车雷达视频字符叠加器结构复杂,可靠性差,成本高昂等问题,在可视倒车雷达设计中采用视频字符发生器芯片MAX7456。该芯片集成了所有用于产生用户定义OSD,并将其插入视频信号中所需的全部功能,仅需少量的外围阻容元件即可正常工作。给出了以MAX7456为核心的可视倒车雷达的软、硬件实现方案及设计实例。该方案具有电路结构简单、价格低廉、符合人体视觉习惯的特点。经实际装车测试,按该方案设计的可视倒车雷达视场清晰、提示字符醒目、工作可靠,可有效降低驾驶员倒车时的工作强度、减少倒车事故的发生。 Abstract: A new video and text generation chip,MAX7456,was used in the design of video parking sensor in order to simplify system structure,improve reliability and reduce cost. This chip included all the necessary functions to generate user-defined OSDs and to add them into the video signals. It could be put into work with addition of just a small number of resistances and capacitors. This paper provided software and hardware implementation solutions and design example based on the chip. The system had the characteristics of simplicity in circuit structure,lower cost,and comfort for the nature of human vision. Loading road test demonstrates high video and text display quality and reliable performance,which makes the driver easy to see backward and reduces chance of accidents.
上传时间: 2013-12-10
上传用户:qiaoyue
本文对激光扫描车身坐标测量系统的数据采集部分进行了深入研究,设计了基于“AVR+FIFO+CPLD”的数据采集及处理模块;解决了当多路信号有数据同时传输时,如何将数据完整地写入FIFO的问题,实现了数据的有效采集;编写了完整的CPLD控制程序和AVR数据采集程序,为准确测量待测点的坐标提供了可靠的数据来源。
上传时间: 2013-10-29
上传用户:asaqq
具有PCI总线等接口形式的采集卡虽然传输速率高,但安装麻烦,易受PC机插槽数量、地址、中断资源的限制。为了解决以上问题,设计了基于ISP1581的高速USB接口的多通道数据采集系统,介绍了系统硬件组成以及软件程序的开发过程。经验证,系统最高传输速率可达60 Mb/s。
上传时间: 2013-10-31
上传用户:ANRAN