Description: 数字温湿度传感器,温湿度传感器SHT21与单片机的数据传输协议及转换程序
-Digital temperature and humidity sensors, temperature and humidity sensor SHT21 and SCM data transmission protocol and the conversion process Platform: |
Size: 153600 |
Author:老黄牛 |
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Description: 华夏经典是一家专业开发、生产、销售LED控制器的厂家，经过多年努力已成功开发出系列针对LED灯饰用的控制器，适用于控制LED全彩发光字、LED全彩数码灯管、LED全彩幕墙灯、LED全彩点光源及小型LED脱机静态显示屏。可以控制市面上大部分的驱动芯片（如：CZ6603、LPD6803、D705、DX416、UCS5903、74HC595、MBI5024、DM134等）。控制灰度最高达256级，画面刷新频率最高达300Hz。脱机型采用大容量SD卡存储花样数据,联机型采用网线直接传送花样数据。客户可根据控制点数选择控制器，也可提出要求定制控制器。自主开发的控制软件操作方便、界面美观，可生成不同的花样数据文件。-Classical Chinese is a professional development, production, marketing LED controller manufacturers, after years of hard work has successfully developed a series of controllers for LED lighting used for full-color control LED luminous characters, LED full color digital tube, LED full Color wall lights, LED full color LED light source and a small static display offline. Can control most of the driver chips on the market (such as: CZ6603, LPD6803, D705, DX416, UCS5903, 74HC595, MBI5024, DM134, etc.). Control up to 256 gray scale, the screen refresh rate up to 300Hz. Offline model with large capacity SD card to store pattern data, together models use a direct cable data transmission pattern. Customers can select the controller according to the control points can also request custom controller. Self-developed control software easy to operate, beautiful interface, can generate different patterns of data files.
Platform: |
Size: 1654784 |
Author:yu |
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Description: 介绍一种由nRF24L01型无线数据传输器和高精度的单总线数字温度传感器DS18B20组成的无线数据传输系统；详细阐述该系统的硬件和软件设计要点；给出基于STC12LE5408
设计的nRF24L01硬件接口电路和程序代
码；并讨论该系统在无线温度采集系统中的应用。
-The wireless data transmission system which is composed of wireless data transmission device nRF24L01 and
high-precision 1-Wire bus digital temperature sensor DS18B20，is introduced in this paper.The hardware and software of the system design are explained in detail.The interface circuit and program code of nRF24L01 based on STC12LE5408 are introduced concretely.Finally，the application of this system in wireless temperature collection system is discussed．
Platform: |
Size: 301056 |
Author:John |
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Description: 该设计控制器使用单片机AT89S51，测温传感器使用DALLAS18B20，用4位共阴极LED数码管以串口传送数据,实现温度显示,可以显示实时温度-The controller design using microcontroller AT89S51, temperature sensors DALLAS18B20, with four common cathode LED digital serial transmission of data to achieve the temperature display, can display real-time temperature Platform: |
Size: 4096 |
Author: 孙小亮 |
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Description: 使用芯片MSP430G2XX3系列，编译环境为IAR，程序已经通过验证。功能实现：实现普通水表的数字化改造，通过安装霍尔传感器到表盘上实现数据的远程传输（485通信）。程序包含的模块：主程序模块，EEPROM模块，初始化模块，计算模块，标准MODBUS协议解析模块。-Use chip MSP430G2XX3 series, the compiler environment IAR, the program has been validated. Functions to achieve: to achieve the digital transformation of ordinary water, through the installation of Hall sensors to dial the remote data transmission (485). Program contains a module: main module, EEPROM module, module initialization, the calculation module, the standard MODBUS protocol analysis module. Platform: |
Size: 1177600 |
Author:zd |
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Description: 研究了一种新型三维MEMS加速度计的性能特点和工作原理。针对加速度计的输出接口特点，设计了基于数字信号处理（DSP）芯片的数据采集系统，实现对加速度计信号的高速实时采集。利用多通道缓存串行口MCBSP实现SPI总线方式的数据采集，并采用两个DMA控制器实现了数据的实时传输和存储。基于设计的DSP数据采集系统，对采集的数据进行了处理，分析了加速度计在一定温度下的偏值稳定性和输出重复性，评估了加速度计的性能。-A novel three-dimensional MEMS accelerometer performance characteristics and working principles are studied. For the features of the accelerometer output interface , a data acquisition system is designed based on digital signal processing (DSP) chip, to realize the accelerometer signal high-speed real-time acquisition. The use of multi-channel buffered serial port MCBSP is to achieve SPI bus (mode of) data collection, and the real-time data transmission and storage is achieved by the use of two DMA controllers .Based on the design of DSP data acquisition system, the collected data are processed, the partial values of the stability and output repeatability of the accelerometer at a certain temperature are analyzed, and the performance of accelerometers are assessed. Platform: |
Size: 78848 |
Author:xingli |
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Description: DMX 512协议是Digital Multiplex的缩写，是灯光行业数字化设备的通用信号控制协议，同时也是是一种国际协议。 USITT DMX512/1990是调光和灯光控制台数据传输标准，是娱乐灯光领域常用的控制协议。以前0-10V模拟控制用的比较多，现在DMX512是娱乐灯光行业最主要的控制协议。USITT DMX512/1990是由美国剧场技术协会USITT提出的。最原始的版本出版于1986年，在1990年做了修改。 -DMX 512 protocol is short for Digital Multiplex is light industry, general-purpose digital signal device control protocol, but also is an international agreement. USITT DMX512/1990 is dimming and lighting control data transmission standard, is commonly used in the field of entertainment lighting control protocol. 0-10V analog control previously used more, now is the entertainment lighting industry, the main DMX512 control protocol. USITT DMX512/1990 by the American Association of Theater Technology USITT s. The original version published in 1986, was revised in 1990. Platform: |
Size: 801792 |
Author:light |
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Description: WINADSL例子
ADSL （Asymmetric Digital Subscriber Line ，非对称数字用户环路）是一种新的数据传输方式。它因为上行和下行带宽不对称，因此称为非对称数字用户线环路。它采用频分复用技术把普通的电话线分成了电话、上行和下行三个相对独立的信道，从而避免了相互之间的干扰。即使边打电话边上网，也不会发生上网速率和通话质量下降的情况。通常ADSL在不影响正常电话通信的情况下可以提供最高3.5Mbps的上行速度和最高24Mbps的下行速度。-ADSL (Asymmetric Digital Subscriber Line, Asymmetric Digital Subscriber Line) is a new data transmission. It is asymmetric because the upstream and downstream bandwidth, so called asymmetric digital subscriber line loop. It uses frequency division multiplexing to ordinary telephone lines into the phone, three separate uplink and downlink channels, thus avoiding mutual interference. Even talking on the phone online, it will not happen speed Internet access and voice quality decline. Usually does not affect normal ADSL in the case of telephone communications can provide up to 3.5Mbps and uplink speeds up to 24Mbps downstream speed. Platform: |
Size: 27648 |
Author:ice |
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Description: 该FT232BM有两个IO pins致力于控制LED状态指示灯，一个用于传输数据的其他接收数据.当数据传输/收到命令从三态各自对低pins车道提供数据传输LEDs迹象.数字一次性定时器使用，因此，即使是一个很小的比例可见的数据传输给最终用户.图12显示confi guration使用两个单独的LED的–之一为收到的其他数据传输的数据.在图13,发送和接收LED指示灯wire-OR ed在一起，以形成一个LED指示灯，显示任何发送或接收数据的活动.-The FT232BM has two IO pins dedicated to controlling LED status indicators, one for the other to receive data transmitted data when the data transmission/receive commands from the tri-state pins each lane of the low data transfer LEDs offer signs off digital timer use, so even a small percentage of the visible data to the end user. Figure 12 shows the configuration using two individual LED s- one of the other data for the received data in Figure 13, to send and receive LED indicator wire-OR ed together to form a LED indicator to show any send or receive data activity. Platform: |
Size: 501760 |
Author:程新 |
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Description: 数字通信系统的数据传输为了保证数据传输的有效性 ,常用的方法就是对传输数据进行 CRC校验。首先分析了CRC的校验原理 ,然后以常见的CRC-16为例 ,提出了生成CRC码的算法 ,给出了该算法的实现软件流程图 ,并在Windows平台上用 VC++实现。该算法实现简单 ,实时性强 ,非常适合于大数据块传输的情况。计算机仿真实验表明 ,这是一种有效地实现CRC校验码的方法 ,为通信系统的差错控制提供了一种简捷的解决方案。-Digital communication system of data transmission in order to ensure the validity of the data transmission, the commonly used method for data transmission is the CRC check. First analysis of the CRC check of principle, and then, with common CRC-16 as an example, this paper proposes the CRC code generation algorithm was presented, the software flow chart of the realization of the algorithm, and the Windows platform with vc++ realized. The algorithm is simple, good real-time, which is very suitable for large blocks of data transmission. Computer simulation experiments show that this is a kind of effectively achieve the CRC check code method, as the communication system error control provides a simple solution. Platform: |
Size: 289792 |
Author:jinzhi |
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Description: 该设计的主要任务是利用单片机及相关外围电路实现I2C总线接口程序的设计，实现单片机与I2C器件数据的正确传输，在把传输的数据在数码管上显示出来。-This design is the main task of the microcontroller and related peripheral circuit implementation the I2C bus interface of the program design, realization and the I2C devices of the single chip microcomputer correct data transmission, in the transmission of data in the digital tube displayed.
Platform: |
Size: 14336 |
Author:克壁 |
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Description: 摘要:介绍了现场可编程门阵列FPGA(Field Programmable Gate Array)器件XCS30的主要特点、技
术参数、内部结构和工作原理，I}述了其在电力系统高速数据采集系统中的应用实例。电力数据采
集装置—馈线终端单元(FTU)需要监测多条线路的电压和电流，实时性要求高，充分利用FPGA
的并行处理能力，对输入信号实行同时采样、分时进行A/D转换，通过在FPGA片上构建的DRAM
进行数据的快速传输。FPGA在系统中承担了较多的实时任务，使DSP芯片TMS320F2812可以在
每个周期时间(20 ms)内完成所有线路的快速傅里叶计算，调用故障分析处理子程序。FPGA降低
了DSP的负荷率.系统的可靠性得到了提高.实际产品应用于配电自动化系统时.故障定位迅速、准确。
-Abstract: this paper introduces the Field reprogrammable Array FPGA (Field Programmable Gate Array) devices XCS30 the main characteristics and skills
Technique parameters, internal structure and working principle, I in its power of} system high speed data acquisition system of application examples. Power data mining
Set device-feeder terminal units (FTU) the need to monitor several routes of voltage and current, high real time requirement, make full use of FPGA
The parallel processing ability, to the input signal and the sampling, points to A/D conversion, through the FPGA in setting up A piece of DRAM
Data fast transmission. FPGA in system for more real-time tasks, make the digital signal processor (DSP) TMS320F2812 can be in
Each cycle time (20 ms) all the finish line fast Fourier calculation, analysis on fault processing procedure call. FPGA reduce
The load rate of DSP. Of the reliability of the system improved. The actual products used in power distribution Platform: |
Size: 88064 |
Author:刘恒 |
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Description: ADSL （Asymmetric Digital Subscriber Line ，非对称数字用户环路）是一种新的数据传输方式。它因为上行和下行带宽不对称，因此称为非对称数字用户-ADSL (Asymmetric Digital Subscriber Line Asymmetric Digital Subscriber Loop) is a new way of data transmission. It uplink and downlink bandwidth asymmetry, known as Asymmetric Digital Subscriber Platform: |
Size: 2008064 |
Author:金本网络 |
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Description: 模数转换器(ADC)将模拟量——现实世界中绝大部分现象的特征——转换为数字语言，以
便用于信息处理、计算、数据传输和控制系统。数模转换器(DAC)则用于将发送或存储的
数据，或者数字处理的结果，再转换为现实世界的变量，以便控制、显示信息或进一步进
行模拟处理。-Analog-to-digital converter (ADC) analog- the vast majority of real-world phenomena characteristic- converted into digital language, in order for the information processing, computing, data transmission and control system. A digital-to-analog converter (DAC) is used to transmit or store the data, or the result of the digital processing and then converted to the real world variables, in order to control, displays a message or further subjected to analog processing. Platform: |
Size: 714752 |
Author:边城 |
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Description: Cyclic Redundancy Check
The cyclic redundancy check, or CRC, is a technique for detecting errors in digital
data, but not for making corrections when errors are detected. It is used primarily
in data transmission. In the CRC method, a certain number of check bits, often
called a checksum, are appended to the message being transmitted. The receiver
can determine whether or not the check bits agree with the data, to ascertain with
a certain degree of probability whether or not an error occurred in transmission. If
an error occurred, the receiver sends a “negative acknowledgement” (NAK) back
to the sender, requesting that the message be retransmitted.
The technique is also sometimes applied to data storage devices, such as a
disk drive. In this situation each block on the disk would have check bits, and the
hardware might automatically initiate a reread of the block when an error is
detected, or it might report the error to software Platform: |
Size: 74752 |
Author:prabhava |
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Description: 能进行异步全双工串行通信的模块，该模块以固定的串行数据传送格式收发数据。每帧数据共10 位，其中1 位启动位，8 位数据位，1 位停止位。模块发送的数据由PC 端的串口调试助手接收，要求能发送数字和中文（一首古诗，在FPGA内采用ROM 的方式存储中文内码），并能进行切换。模块接收PC 端串口调试助手发送的16 进制数据，可按10 进制方式显示到LED 上。-Asynchronous full-duplex serial communications module can be performed, the data of the module to the fixed serial data transmission format transceiver. 10 of each frame of data, a start bit, 8 data bits, 1 stop bit. Module sends the data received from the PC side of serial debugging assistant requirements can send digital and Chinese (a poem using the FPGA code ROM stored in a manner Chinese), and can be switched. The module receives the PC side of serial debugging assistant send hexadecimal data can be decimal display on the LED. Platform: |
Size: 2847744 |
Author:王婷 |
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Description: digital watermarking is a process by which a user-specified
signal is hidden or embedded into another signal , for
example digital content such as electronic documents, images,
sounds and video [2]. The use of digital video applications
such as video-conferencing, digital television, digital cinema,
distance learning, videophone, and video-on-demand has
grown very rapidly over the last few years. Today it is much
easier for the digital data owners to transfer multimedia data
over the internet, and hence the data could be perfectly
duplicated and rapidly redistributed on a large scale. Thus, the
importance of copyright protection for multimedia data has
become more critical. Digital watermarking is an effective way
to protect the copyright of multimedia data even after its
transmission there is urgent demand for techniques to protect
the original digital data and to prevent unauthorized
duplication or tampering. Platform: |
Size: 399360 |
Author:jumana_phdstudent |
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Description: 采用ch375构成的usb接口进行数据传输，atmega128作为控制器，将探测器输出的模拟量转换成数字量，进行存储，等待上位机的读取。-To improve the speed of the serial port, using usb interface consisting ch375 for data transmission, atmega128 as a controller, the detector output analog into digital, for storage, wait for the PC to read. Platform: |
Size: 24576 |
Author:leon |
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Search - digital data transmission