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Description: 1).能够实现对班级学生基本信息的录入，包括学生的学号，姓名，性别，专业，民族以及出生年月等。 2).能够实现对学生基本信息的修改。 3).根据学号对学生信息进行查询。 4).能够删除某些学生的信息。-1)able to insert the basic information of students,including number,gender,major,nation and birthday.
2)able to modify basic information of students.
3)query student s information by his/her number.
4)delete information of certain students.
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Size: 135168 |
Author: |
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Description: DALLAS iBUTTONS的软件资源,有C代码示例-Dallas iBUTTONS software resources and C code examples
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Size: 294912 |
Author: IT民工 |
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Description: SPI 4线接口spec,对硬件和驱动有兴趣的朋友可以下载-SPI 4-wire interface spec, the hardware and drivers are interested in a friend can be downloaded
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Size: 157696 |
Author: lee |
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Description: // This program accesses a SPI EEPROM using polled mode access. The F06x MCU
// is configured in 4-wire Single Master Mode, and the EEPROM is the only
// slave device connected to the SPI bus. The read/write operations are
// tailored to access a Microchip 4 kB EEPROM 25LC320. The relevant hardware
// connections of the F06x MCU are shown here:
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Size: 72704 |
Author: 蓝天 |
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Description: 本例载波频率为20KHz，或载波周期为50μs。DSP晶振10MHz，内部4倍频，时钟频率为40MHz，计数周期为25ns。假设调制波频率由外部输入（1～50Hz），并转换成合适的格式（本例为Q4格式）。调制系数M为0～0.9。死区时间1.6μs。最小删除脉宽3μs。
主程序的工作是根据输入的调制波频率计算N、2N和M值。
-Example for the carrier frequency 20KHz, or carrier period is 50μs. DSP crystal 10MHz, internal 4 multiplier, the clock frequency of 40MHz, counting cycle 25ns. Assuming wave frequency modulation by external input (1 ~ 50Hz), and converted into an appropriate format (in this case for Q4 format). Modulation coefficient M is 0 ~ 0.9. Dead time 1.6μs. Delete the smallest pulse width 3μs. The work of the main program is based on input frequency modulation wave calculation of N, 2N and M values.
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Size: 15360 |
Author: liuhx |
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Description: *** *** *** *****
** Two wire/I2C Bus READ/WRITE Sample Routines of Microchip s
** 24Cxx / 85Cxx serial CMOS EEPROM interfacing to a
** PIC16C54 8-bit CMOS single chip microcomputer
** Revsied Version 2.0 (4/2/92).
**
** Part use = PIC16C54-XT/JW
** Note: 1) All timings are based on a reference crystal frequency of 2MHz
** which is equivalent to an instruction cycle time of 2 usec.
** 2) Address and literal values are read in octal unless otherwise
** specified.
-************************* Two wire/I2C Bus READ/WRITE Sample Routines of Microchip s** 24Cxx/85Cxx serial CMOS EEPROM interfacing to a** PIC16C54 8-bit CMOS single chip microcomputer** Revsied Version 2.0 (4/2/92).**** Part use = PIC16C54-XT/JW** Note: 1) All timings are based on a reference crystal frequency of 2MHz** which is equivalent to an instruction cycle time of 2 usec.** 2) Address and literal values are read in octal unless otherwise** specified.
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Size: 2048 |
Author: 刘星星 |
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Description: SD卡读卡器模块的VHDL及软件驱动代码，可作为外设挂接在Avalon总线上。支持以SD模式、4线模式读取。在24MHz时钟驱动下读取速率可达8MByte/s-SD card reader module and software drivers VHDL code, can be articulated as a peripheral bus in Avalon. To support the SD model, 4-wire mode read. Driven by the 24MHz clock rate up to read 8MByte/s
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Size: 18432 |
Author: ctqy |
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Description: 通过时三相三线有功电能表计算原理和接线方式的分析, 详细计算了接线回路不同故阵时求取真实电贡的补算系数, 并阐述了电童的补算方法。-The passage of three-phase three-wire active energy meter calculation principle and the connection mode of analysis, detailed calculations of the wiring circuit different when it is to strike a true array of premium calculation tribute electric coefficient, and described the child' s premium electric methods.
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Size: 151552 |
Author: 李飞 |
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Description: ADS7846/7843芯片 适合用在4线制触摸屏，它通过标准SPI协议和CPU通信，操作简单，精度高，当触摸屏被按下时（即有触摸事件发生）则ADS7846向CPU发中断请求，CPU接到请求后，应延时一下再响应其请求，目的是为了消除抖动使得采样更准确。如果一次采样不准确，可以尝试多次采样取最后一次结果为准，目的也是为了消除抖动。-ADS7846/7843 chip suitable for use at 4-wire Touch Panel, which through a standard SPI protocol and CPU communications, easy operation and high precision, when the touch screen is pressed (ie, touch case has happened) is ADS7846 hair to the CPU interrupt request, CPU access to the request should be delayed and then respond to their request, aimed at the elimination of jitter in order to make a more accurate sampling. If a sample is not accurate, you can try many times the last time check the results of sampling, whichever it is also aimed at the elimination of jitter.
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Size: 1024 |
Author: 不动 |
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Description: Wi-Fi(wlan 无线局域网)作为当今无线领域最为热门的一个技术， 已经应用到各行各业中。它使用TCP标准通讯，技术成熟可靠，传输速率快，各种配套的网络设备十分丰富，使用者接受程度最高， 全球免费使用，是区域无线通讯的首选方案。
SOC芯片，性价比极高，质量稳定，内置WiFi协议栈和串口传输协议，接口信号5V、地、RX 、TX四线连接；
◆ 模块简洁、体积小，22*60*5 mm；
◆ 用户接口开发简单快捷，串口驱动 ，内置协议栈，无需操作系统支持；
◆ MSC51/PIC/ARM7 等 8、32位单片机轻易驱动，驱动代码极少；
智能卡终端；无线POS机；医疗仪器；数据采集；手持设备；设备参数监测；现代农业；军事领域；智能交通；现代教育；电子屏.-Embedded Serial-to-Wi-Fi wifi wireless LAN module
Wi-Fi (wlan wireless local area network), as of today s wireless technology, one of the most popular has been applied to all walks of life. It uses the standard TCP communications, technology is mature, reliable, fast transfer rates, various supporting network equipment is very rich,
The highest degree of user acceptance, the global free of charge, is the first choice of regional wireless communications.
SOC chip, cost-effective high quality and stable, built-in WiFi protocol stack and serial transfer protocol, interface signal 5V, ground, RX, TX four-wire connection
◆ Module simplicity, small size, 22* 60* 5 mm
◆ develop simple and efficient user interface, serial drive, built-in protocol stacks, without operating system support
◆ MSC51/PIC/ARM7 such as 8,32-bit microcontroller easily driven, driven very little code
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Size: 521216 |
Author: 陈坚胜 |
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Description: Although accurate digital thermometers
are now available at low cost, it remains
exciting and instructive to build one your-
self. The present circuit is particularly
intended to help the reader in the use of
a PIC processor Type PIC16F84 (see
www.microchip.com), a temperature sen-
sor with 1-Wire protocol Type DS1820
(see www.maxim-ic.com), an LCD screen
with 2x16characters (HD44780 com-
patible) and a light sensor with an LDR
that determines whether the background
lighting of the LCD should be on
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Size: 123904 |
Author: Ivan |
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Description: -wire 总线是Maxim公司的产品，能实现在一根数据总线双向传输数据，其特有的64位全球唯一的光刻标识，使得一根数据总线上能挂接多个一线设备而无冲突，便于进行大规模的布点测控，使系统布线更方便，并最大限度的节省通信线的数量，但其独特的一线式通信协议，使其不能直接接入微机系统，而必须进行转换。硬件设计主要完成两个方面的设计，一是利用PC 机串行口供电的设计，另一是RS-232 电平到TTL电平转换的设计，硬件电路
--Wire bus is Maxim' s products, can achieve a two-way data bus transferring data, the unique 64-bit global unique identification lithography, making a data bus line can mount multiple devices without conflict, facilitate monitoring and control for large-scale distribution, the system wiring easier and to maximize the savings in the number of communication lines, but its unique line type communication protocol, it can not directly access computer systems, but must be converted. Hardware design was completed for two aspects of design, one serial port using PC-power design, and the other is RS-232 levels to TTL level converter design, the hardware circuit
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Size: 84992 |
Author: mugua |
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Description: The AT24C164 provides 16,384 bits of serial electrically erasable and programmable
read only memory (EEPROM) organized as 2048 words of 8 bits each. The device’s
cascadable feature allows up to eight devices to share a common 2-wire bus. The
device is optimized for use in many industrial and commercial applications where low
power and low voltage operation are essential.
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Size: 182272 |
Author: Vladimir |
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Description: 为了提高算法的执行效率, 应用粒子群算法求取图像中任意两点间最短路径来定位目标边界, 并与经典的基于Dijkstra 动态规划图搜索的Liv e Wire 算法进行比较.-In order to improve the efficiency of the algorithm, particle swarm algorithm to strike any of images to locate the shortest path between two object boundaries, and with the classical dynamic programming graph search based on Dijkstra' s algorithm to compare Liv e Wire.
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Size: 318464 |
Author: 莉 |
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Description: DLIS-2K线阵图像传感器包括4行像素，每行有2081个光学像素和16黑像素。其中3行为4 x 4 micron方形像素，另一行为4x32 micron长方形像素。通过运用 Correlated Multi-Sampling (CMS)方法，其等效灵敏度可达160 V/lux-s。每一行可任意控制曝光及输出。此外，背景采样可使用常规 Correlated Double Sampling (CDS)值或设为用户控制的环境光值。传感器由3线串口控制，集成了我们的专利技术 high speed Distributed 8 to 11 bit Analog to Digital Converter (D/AD), XtremeIX 和 Active column sensor technologies 来最大的实现应用功能。这是它的不具体的应用文档
-DLIS-2K image sensor pixel, including 4 lines, each line has 2081 pixels and 16 of optical black pixels. 3 of act 4 x 4 micron square pixels, and the other acts 4x32 micron rectangular pixels. By using Correlated Multi-Sampling (CMS) method, the equivalent sensitivity of up to 160 V/lux-s. Each line can control the exposure and output. In addition, background samples using conventional Correlated Double Sampling (CDS) or set the user control the value of the ambient light value. By the 3-wire serial control sensor integrates our proprietary technology high speed Distributed 8 to 11 bit Analog to Digital Converter (D/AD), XtremeIX and the Active column sensor technologies to achieve the largest applications. This is its documentation without specific applications
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Size: 604160 |
Author: liwenjie |
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Description: 这是一篇硕士论文：论述了矢量控制的理、坐标变换矩阵和三相异步电机的基本方程式，推导出了异步电机在不同坐标系下的数学模型，实现了异步电机转矩电流、励磁电流的解耦，然后分析、比较了无速度传感器矢量控制的各种方法的原理及优缺点，对常用的自适应法和反电动势法进行了更为详细的原理和仿真比较，并将带速度传感器控制系统的性能和无速度传感器控制系统的性能进行了比较；最后设计了模糊控制器对电机定子电阻进行在线检测，增强矢量控制系统的鲁棒性。-This is a master s thesis ： the vector control of the administration, the transformation matrix and coordinate with a three wire asynchronous the motor of the basic formula of the asynchronous motor, resulting in a different coordinate system of mathematical model, the realization of the asynchronous the motor turned the current, the solution urges, and then analyzing and my speed sensor vector control of theprinciples and commonly used to act against the law and pose a more detailed and emulation, and will take speed sensor control
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Size: 1971200 |
Author: 高菲悦 |
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Description: MSP430F5438 的串口 Bootloader （非BSL下载方式）,从串口下载，两线即可，类似STC的MCU。带原代码及说明文档，方便二次开发。-Bootloader for MSP430F5438,while it s not a BSL methed, This program download by Serial Comm, that means Two Wire download.seems like STC 51 MCU。 with a document,and the code。You can develep on it for more Aplication!
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Size: 1484800 |
Author: rolcye |
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Description: 对于 PCB 的设计， Protel DXP 提供了详尽的 10 种不同的设计规则，这些设计规则则包括导线放置、导线布线方法、元件放置、布线规则、元件移动和信号完整性等规则。根据这些规则， Protel DXP 进行自动布局和自动布线。很大程度上，布线是否成功和布线的质量的高低取决于设计规则的合理性，也依赖于用户的设计经验。
对于具体的电路可以采用不同的设计规则，如果是设计双面板，很多规则可以采用系统默认值，系统默认值就是对双面板进行布线的设置
-For the design of the PCB, Protel DXP provides a detailed 10 different design rules, these design rules include wire placement, wire routing method, component placement, routing rules, signal integrity components, mobile and rules. According to these rules, Protel DXP for automatic placement and automatic routing. A large extent, the success of routing and routing design rules depends on the level of quality is reasonable, but also depends on the user' s design experience. For the specific circuit design rules can be different, if it is double-sided design, a lot of rules can use the system default value, default value is the two-panel layout settings
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Size: 719872 |
Author: liming |
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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.
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Size: 501760 |
Author: 程新 |
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Description: TLC5615C, TLC5615I
10-BIT DIGITAL-TO-ANALOG CONVERTERS
-10-Bit CMOS Voltage Output DAC in an
8-Terminal Package
5-V Single Supply Operation
3-Wire Serial Interface
High-Impedance Reference Inputs
Voltage Output Range . . . 2 Times the
Reference Input Voltage
Internal Power-On Reset
Low Power Consumption . . . 1.75 mW Max
Update Rate of 1.21 MHz
Settling Time to 0.5 LSB . . . 12.5 µ s Typ
Monotonic Over Temperature
Pin Compatible with the Maxim MAX515
ications
Battery-Powered Test Instruments
Digital Offset and Gain Adjustment
Battery Operated/Remote Industrial
Controls
Machine and Motion Control Devices
Cellular Telephones
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Size: 305152 |
Author: li |
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