Luminary Micro provides an analog-to-digital converter (ADC) module on some members of theStellaris microcontroller family. The hardware resolution of the ADC is 10 bits; however, due to noiseand other accuracy-diminishing factors, the true accuracy is less than 10 bits. This application noteprovides a software-based oversampling technique, resulting in an improved Effective Number OfBits (ENOB) in the conversion result. This document describes methods of oversampling an inputsignal, and the impact on precision and overall system performance.
标签： Oversampling Techniques ADC fo
上传时间： 2013-12-17
上传用户：zhyiroy
基于LabVIEW和单片机的空调温度场测量系统的研究:室内温度是空调系统舒适性的重要指标,对其及时、准确地测量显得非常重要。介绍单片机AT89C51 和数字式、单总线型温度传感器DS18B20 组成矩形测量网络采集空调室内40 点温度,LabVIEW作为开发平台,二者之间通过串口实现数据通信,利用LabVIEW强大的数据处理和显示功能对采集的空调温度场数据进行实时处理、分析和显示,详细介绍了系统的硬件结构和软件模块的设计方案。关键词:单片机;DS18B20 ;LabVIEW;串行通信 Abstract : Temperature is a very important criterion of air condition system′s comfort , so it is very significant to measure it accurately and real timely. This paper int roduces a data acquisition system of measuring 40 point s temperature for air condition room based on single wire digital sensor DS18B20 and microcont roller AT89C51 which are composed of rectangle measuring meshwork. The data communication between LabVIEW and microcont roller is executed via serial port ,and the temperature field data of air condition room are processed analyzed and displayed on LabVIEW. The hardware and software modules are also given in detail.Keywords : single chip ;DS18B20 ;LabVIEW; serial communication
上传时间： 2014-05-05
上传用户：KSLYZ
基于单片机的步进电机开环控制系统:通过ATMEL89C51单片机对步进电机进行控制,主要介绍了步进电机控制器、驱动电路和LED显示电路的设计,实现了步进电机的开环控制。在步进电机控制器的设计中,重点阐述了脉冲产生电路以及对速度的控制。该系统具有成本低、控制方便的特点。关键词: 单片机; 步进电机; 开环控制 Abstract: The design using ATMEL89C51 single chip to control the step2motor with its controller, driving circuit and LED disp lay circuit to realize step motor open2loop controlwere introduced. For the controller in this design,the circuit to p roduce pulse and the speed controlwere expatiated emphatically. This system possesses features of lower cost, easier control.Key words: single ch ip; step2motor; open2loop con trol
上传时间： 2013-10-13
上传用户：cicizoe
基于单片机的除尘控制器的设计:介绍通用控制仪的硬件组成和软件设计,阐述了系统的性能指标和功能特点。该产品功能完善,可靠性高,具有很好的应用前景。关键词: 除尘器;通用控制仪;单片机;系统设计 Abstract: The hardware structure and the software design are introduced in this paper, and the performance index and the features of the system are expounded. It has comp rehensive functions, high reliability and good app lication.Key words: dust catcher; universal controller; microcontroller; system design
上传时间： 2013-11-16
上传用户：ming52900
一种实用的微机自动配料秤系统:介绍一种由单片机构成的配料秤。叙述了秤的传感器、变送器、信号的变换、硬件原理、软件流程以及和DCS 系统构成的单回路调节系统,此系统可广泛地应用于各行业的配料控制中。关键词:配料秤 单片机 单回路调节系统 DCS 系统 Abstract :A proportioning weigher based on single chip computer is introduced. Sensors , transmitters , signal converting , principle of hardware ,software flowchart of proportioning weigher and single loop control system composed with DCS system are emphasized ,this system can be used in proportioning control of various trades extensively.Key Words :Proportioning Weigher ,Single Chip Computer ,Single Loop Control System ,Distributed Control System
上传时间： 2013-10-12
上传用户：zwei41
The Motorola MPC106 PCI bridge/memory controller provides a PowerPCªmicroprocessor common hardware reference platform (CHRPª) compliant bridgebetween the PowerPC microprocessor family and the Peripheral Component Interconnect(PCI) bus. In this document, the term Ô106Õ is used as an abbreviation for the phraseÔMPC106 PCI bridge/memory controllerÕ. This document contains pertinent physicalcharacteristics of the 106. For functional characteristics refer to theMPC106 PCI Bridge/Memory Controller UserÕs Manual.This document contains the following topics:Topic PageSection 1.1, ÒOverviewÓ 2Section 1.2, ÒFeaturesÓ 3Section 1.3, ÒGeneral ParametersÓ 5Section 1.4, ÒElectrical and Thermal CharacteristicsÓ 5Section 1.5, ÒPin AssignmentsÓ 17Section 1.6, ÒPinout Listings 18Section 1.7, ÒPackage DescriptionÓ 22Section 1.8, ÒSystem Design InformationÓ 24Section 1.9, ÒDocument Revision HistoryÓ 29Section 1.10, ÒOrdering InformationÓ 29
上传时间： 2013-11-04
上传用户：as275944189
Internal Interrupts are used to respond to asynchronous requests from a certain part of themicrocontroller that needs to be serviced. Each peripheral in the TriCore as well as theBus Control Unit, the Debug Unit, the Peripheral Control Processor (PCP) and the CPUitself can generate an Interrupt Request.So what is an external Interrupt?An external Interrupt is something alike as the internal Interrupt. The difference is that anexternal Interrupt request is caused by an external event. Normally this would be a pulseon Port0 or Port1, but it can be even a signal from the input buffer of the SSC, indicatingthat a service is requested.The User’s Manual does not explain this aspect in detail so this ApNote will explain themost common form of an external Interrupt request. This ApNote will show that there is aneasy way to react on a pulse on Port0 or Port1 and to create with this impulse an InterruptService Request. Later in the second part of the document, you can find hints on how todebounce impulses to enable the use of a simple switch as the input device.Note: You will find additional information on how to setup the Interrupt System in theApNote “First steps through the TriCore Interrupt System” (AP3222xx)1. It would gobeyond the scope of this document to explain this here, but you will find selfexplanatoryexamples later on.
上传时间： 2013-10-27
上传用户：zhangyigenius
The Infineon TriCore provides an Interrupt System with a high safety standard. Thisdocument contains some instructions on how to initiate an Interrupt from an externaldevice. First it will show you how to trigger an Interrupt Service Request by an impulseon Port 0 or Port 1. Then in the second part of the document you can find hints how todebounce impulses to enable the use of a simple switch as input device.Authors: Thomas Bliem, CQ Nguyen / Infineon SMI MD Apps
上传时间： 2013-11-05
上传用户：uuuuuuu
This application note shows how to write an Inter Integrated Circuit bus driver (I²C) for the Philips P90CL301micro-controller.It is not only an example of writing a driver, but it also includes a set of application interface software routines toquickly implement a complete I²C multi-master system application.For specific applications the user will have to make minimal changes in the driver program. Using the drivermeans linking modules to your application software and including a header-file into the application sourceprograms. A small example program of how to use the driver is listed.The driver supports i.a. polled or interrupt driven message handling, slave message transfers and multi-mastersystem applications. Furthermore, it is made suitable for use in conjunction with real time operating systems, likepSOS+.
上传时间： 2013-11-23
上传用户：weixiao99
The P90CL301 is a highly integrated 16/32 bit micro-controller especially suitable for applications requiring lowvoltage and low power consumption. It is fully software compatible with the 68000. Furthermore, it provides bothstandard as well as advanced peripheral functions on-chip.One of these peripheral functions is the I2C bus. This report describes worked-out driver software (written in C) toprogram the P90CL301 I2C interface. It also contains interface software routines offering the user a quick start inwriting a complete I2C system application.
上传时间： 2014-01-06
上传用户：气温达上千万的
