为了在工业生产及过程控制中准确测量温度，设计了一种基于低功耗MSP430单片机的数字温度计。整个系统通过单片机MSP430F1121A控制DS18B20读取温度，采用数码管显示，温度传感器DS18B20与单片机之间通过串口进行数据传输。MSP430系列单片机具有超低功耗，且外围的整合性高，DS18B20只需一个端口即可实现数据通信，连接方便。通过多次实验证明，该系统的测试结果与实际环境温度一致，除了具有接口电路简单、测量精度高、误差小、可靠性高等特点外，其低成本、低功耗的特点使其拥有更广阔的应用前景。 Abstract: In order to obtain accurate measuring temperature in industrial production and process control， a digital thermometer based on MSP430 MCU is designed. The system uses MSP430F1121A MCU to control DS18B20， and gets the temperature data， which is displayed on the LED. The temperature sensor DS18B20 and MCU transmit data through serial communication. MSP430 series has ultra-low power and high integration， DS18B20 only needs one port to achieve data communication. Through many experimental results prove， this system is consistent with actual environment temperature. The system has characteristics of interface circuit simple， high measuring accuracy， minor error， high reliability， besides， the characteristics of low cost and low power make it having vaster application prospect.
上传时间： 2013-10-16
上传用户：wettetw
The CAT93C46 is a 1 kb Serial EEPROM memory device which isconfigured as either 64 registers of 16 bits (ORG pin at VCC) or 128registers of 8 bits (ORG pin at GND). Each register can be written (orread) serially by using the DI (or DO) pin. The CAT93C46 features aself−timed internal write with auto−clear. On−chip Power−On Resetcircuit protects the internal logic against powering up in the wrongstate.
上传时间： 2013-11-20
上传用户：ynzfm
Bootloader是微处理器上电时运行的第一段代码，它可以通过通信接口实现对微处理器内部应用程序的更新升级，为网络化嵌入式产品的应用程序升级带来极大的便利。由于目前没有统一嵌入式系统的Bootloader。基于NEC 78K0系列单片机自编程原理，设计出一个适用于78K0/Fx2系列单片机的Bootloader，并能够通过单片机串口在线升级应用程序。 Abstract: Bootloader is the first piece of code executed after microprocessor startup. It makes the embedded product’s firmware update conveniently through communication interface. However， no unified bootloader is available for all kinds of microprocessor products. Based on the principle of self-programming NEC 78K0s’ series， a useful Bootloader which is suitable for 78K0/Fx2s’ series MCU is designed，the design can update the application through serial ports.
标签： Bootloader MCU 自编程
上传时间： 2013-10-26
上传用户：fang2010
本文介绍了基于AT89C52 单片机的自动水温控制系统的设计及实现过程。该系统具有实时显示、温度测量、温度设定并能根据设定值对环境温度进行调节实现控温的目的以及达到上下限温度报警功能，控制算法是基于数字PID 算法。关键词 ：PID AT89C52 脉宽调制 实时 Abstract ： This article describes AT89C52 single-chip microcomputer-basedautomatic water temperature control system design and implementation process. Thesystem has real-time display, temperature measurement, temperature settings and theenvironment in accordance with the temperature settings adjusted to achieve thepurpose of temperature control and reach the upper and lower limits of temperaturealarm function, the control algorithm is based on the digital PID algorithm.Keyword: PID AT89C52 PWM real time
上传时间： 2013-10-10
上传用户：归海惜雪
IntroductionAs chip designers pack more functions into ICs,pin counts continue to grow and the space betweenpins keeps shrinking. Pin spacings of 0.5 mm and0.65 mm are not at all uncommon. The power ofthese new ICs is wonderful, to be sure, but trou-bleshooting them can be a chore because connect-ing scopes and logic analyzers has become muchmore difficult and less dependable.
标签： Agilent Probing Wedge High
上传时间： 2013-10-22
上传用户：蒋清华嗯
基于AT89C52单片机的步进电机控制系统设计 摘 要: 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 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.
上传时间： 2013-11-22
上传用户：vodssv
The LPC1769/68/67/66/65/64 are ARM Cortex-M3 based microcontrollers for embedded applications featuring a high level of integration and low power consumption. The ARM Cortex-M3 is a next generation core that offers system enhancements such as enhanced debug features and a higher level of support block integration.
上传时间： 2014-02-20
上传用户：13215175592
Nios 的用户定义接口逻辑实例 有许多人问我使用 Nios 的用户定义接口逻辑怎么用，想了几天决定设计一个实例来说明。该例为一个使用 user to interface logic 设计的 PWM 实例，其中包括三个文件： plus32.v 是一个为 32bit nios 设计的 pwm 实例。 plus16.v 是一个为 16bit nios 设计的 pwm 实例。 test.s 是一个使用中断调用 pwm 的汇编语言测试程序。以上模块和程序均调试通过，并可稳定工作。这里让大家参考是使大家通过该例来真正理解 user to interface logic 设计方法，和nios 中通过汇编调用中断的方法，所以超值喔。另外热烈欢迎大家的指导。 注：在设计 Nios 时，将你调用的 user to interface logic 插件重命名为 plus_0，这样我的 test.s 可不作任何改动，你就可用示波器通过 nios 的 plus 管脚观察到一个要求的输出。
上传时间： 2013-11-15
上传用户：cc1915
MC9S08QG8英文资料 The MC9S08QG8 is the newest member of the Freescale 8-bit family of highly integratedmicrocontrollers, based on the high-performance yet low power HCS08 core. The MC9S08QG8is an excellent solution for power-sensitive applications with extended battery life and maximum performance down to 1.8VDC.
上传时间： 2014-12-28
上传用户：dxxx
本文介绍了一种基于单片机的健身车转速测量系统。该系统具有电路简单、使用方便等特点。文中详细介绍了该系统的工作原理,并且给出了它的硬件原理图和软件设计程序框图。关键词:转速 单片机 测量ABSTRACT :This paper introduces a measuring system of the rotational velocity of exercise bike based on single - chip microcomputer . It has such advantages : simple circuit ,convenient use and so on. The work principle is presented in detail in this paper and the block diagram of hardware and program flow chart are giv2 en as well .KEYWORDS :Rotational velocity Single - chip microcomputer Measuring
上传时间： 2013-11-02
上传用户：源弋弋
