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
在嵌入式系统中,嵌入式CPU往往要通过各种串行数据总线与“外界”进行通信。在应用中,异步的串行数据通信用得较多,而通用异步收发器UART(Universal Asynchronous Receiver Transmitter)在其中扮演着重要角色:完成数据的串并转换,即把并行数据按照通信波特率转化为通信协议中规定的串行数据流,也可从串行数据流中取出有用数据转变为并行数据。而UART与CPU接口简单,CPU只需通过执行读写操作即可完成收发数据,从而完成与外界的通信。有许多现成的芯片可以实现UART的功能,如常用的Intel8250/8251接口芯片就可以作为RS232、RS422串口的UART控制芯片。
上传时间: 2013-11-25
上传用户:www240697738
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
介绍了一种基于C8051F020单片机的多路压力测量仪。该测量仪选用电阻应变式压力传感器采集压力信号,并经放大电路处理后送入C8051F020单片机,再由C8051F020单片机内部的A/D转换器将采集到的压力信号进行模数转化,然后分别对数据进行存储和显示。该测量仪能测量6路压力信号,并且各测量点都能单独检测和设置。由于采用了C8051F020单片机,简化了硬件电路,增强了抗干扰能力,使得测量仪具有测量精度高,冲击小等特点。 Abstract: A measurement apparatus for multi-channel pressure based on single chip microcomputer is introduced.It can measure 6 channels signal of the pressure,and the pressure measure points can be detection and located individually.The pressure signal sampling is obtained by resistor stress-type pressure sensors,the digital signals of 6 channels are collected through amplifying and adjustment circuit of pressure signals and internal integrated A/D converter of MCU.Finally,and it realizes the function to store and display data separately.C8051F020 was used to made hardware circuit simple,and it also enhanced the anti-interference ability.It features high precision and little impact.
上传时间: 2013-11-16
上传用户:yare
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
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