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8253 8259 time
- 计时程序,对8253进行分频,使用二个计数器,使第二个计数器的OUT作为中断源,送到8259产生中断,在LED上显示时间-time procedures for the 8,253-frequency, the use of two counters, so that a second counter OUT interrupted as a source to have interrupted 8259, the time shown on the LED
89S51-TEA5767
- I2C控制TEA5767,每按一次按键步进0.1M,频率(88-108MHZ)-I2C control TEA5767 every time a key step 0.1M, frequency (88-108MHZ)
duojiwuxiantongxin
- 无线通信系统 1、系统由一个主站,多个从站组成。主站以轮询方式收集从站的数据,每次传输一组仿真数据。 2、从站有两组数字信号。从站传输哪一组数据由主站决定。 3、设计制作无线半双工收发单元,其工作频率(400-500)MHz中自行选择,各收发单元工作频率的相对准确性(以主站工作频率为基准)优于10-4。所有收发单元的发射功率不大于1w。 4、主从站收发天线长度 1m,垂直放置。 5、主站能实时显示发送数据的从站好及其数据。从站能实时显示本站发送给主站的数据;从站采用电池供电。
I2C_PIC16C5x_FV.rar
- *** *** *** *** *** *** ***** ** 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). ** ** Par
69491761nrfuihh
- 组网协议设计中,务必保证在一个频点上,且同一时刻只能有一个RF模块处在发射状态-Network protocol design, make sure that in a frequency point, and the same time there can be only one RF module in the launch state
pudn2
- 一般来说,瞬时频率和群延迟在时频平面内定义了两条不同的曲线,但是在时宽(T)和频宽(B)的乘积值逐渐变大时,这两条曲线会慢慢逼近。为了说明这一点,下面计算了信号的瞬时频率和群延迟,T*B值大。-Generally speaking, the instantaneous frequency and group delay in the time-frequency plane defines two different curves, but when the width [T] and band
nspab
- 最新版计算三维HHT时频图的M文件,很有用-HHT the latest version of the calculation of three-dimensional time-frequency map M files, very useful
chengxu
- 公交调度显示系统开发 显示当前时间和下一班次车子出发时间,可以通过软件或硬件随意更改预设时间,并且有班次到达的语音提示 -Public transportation systems development Scheduling display shows the current time and the frequency of the car the next departure time, you can change the software or hardware random
Electronicorgan
- 电子琴的汇编语言实现,利用TPC-H实验箱上的8253实现二级分频,同时配合以8255A,与门和DAC0832,通过扬声器放音,实现两个八度音高(包括半音)的电子琴。在软硬件相互配合下,电子琴具有弹奏和播放已存乐曲的功能,音长可控,播放速度可选,拥有美观的图形界面模拟真实琴键,且琴键随弹奏有起伏变化。利用微机内部的8253,8255A和内置扬声器,与TPC-H实验板上的8255A和LED,实现节拍器,可产生长度和速度可控的2/4拍,3/4拍及4/4拍等,LED和内置扬声器同时对节拍进行提示。-E
vhdl
- 信号与线性系统的时频域分析:观测已知方波信号、正弦波信号的频谱;观测实时模拟信号的频谱;加深理解时域周期信号的各频率分量在振幅频谱图上所占的比重;观测相位在波形合成中的作用;LTI系统的频域分析,LTI系统对周期性输入信号的响应。-Signals and linear systems with time-frequency domain analysis: observation known square wave signal, sine wave signal spectrum obser
shuzipinlvji
- 本数字频率计将采用定时、计数的方法测量频率,采用一个1602A LCD显示器动态显示6位数。测量范围从1Hz—10kHz的正弦波、方波、三角波,时基宽度为1us,10us,100us,1ms。用单片机实现自动测量功能。-This digital frequency meter will use fixed time, the counting method survey frequency, uses 1602The LCD monitor dynamic to demonstrate 6 fi
LS
- 试验模态分析的时域识别方法的一种,可以识别出信号的模态参数,固有频率阻尼比振型系数,-Experimental modal analysis of a time-domain identification method that can identify the signal modal parameters, natural frequency mode of vibration damping ratio coefficient,
timefrequencyanalyst
- 此程序为时频分析工具箱,在MATLAB中添加此工具箱可对信号进行时频分析,无需再自己编写程序-This program is too frequency analysis toolbox, add to this toolbox in MATLAB can signal time-frequency analysis, no longer need to write your own program
shipinfenxi
- 时频分析方法提供了时间域与频率域的联合分布信息,清楚地描述了信号频率随时间变化的关系。-Time-frequency analysis method provides a time-domain and frequency domain, the joint distribution of information that clearly describes the signal frequency versus time relationships.
extraction-of-high-frequency-data
- 新浪网页上提取债券数据 实时的高频数据-Real-time data extraction bonds frequency data on the Sina website
HHT
- 时频分析的希尔伯特-黄变换方法适用于非线性非平稳的信号分析。-Time-frequency analysis of Hilbert- Huang Transform method is applicable to non-linear non-stationary signal analysis.
WignerVille
- 时频分析的Wigner-Ville分布方法是非平稳信号分析的有力工具,交叉项的存在在一定程度上影响其使用。-Powerful tool Wigner-Ville distribution method for time-frequency analysis of non-stationary signal analysis, the existence of cross terms to some extent affect its use.
pinpu_sanwei
- matlab频谱三维图,时间频率幅值。频谱分析三维图,计算机绘制的三维频谱以频率为横坐标,以振幅为纵坐标,以时间为斜轴,在视觉上是一种立体频谱。-Matlab three dimensional spectrum diagram, time frequency amplitude. Spectrum analysis of three-dimensional map, 3D computer generated by frequency spectrum as the abscissa, the
time
- 1、 8051内部定时计数器T0,按计数器模式和方式1工作,对P3.4(T0)引脚进行计数。将其数值按二进制数在P1口驱动LED灯上显示出来。 2、外部事件计数脉冲由P3.4引入定时器T0。单片机在每个机器周期采样一次输入波形,因此单片机至少需要两个机器周期才能检测到一次跳变。这就要求被采样电平至少维持一个完整的机器周期,以保证电平在变化之前即被采样。同时这就决定了输入波形的频率不能超过机器周期频率。-Internal timing counter T0 1, 8051, accordin
time_frequency_matlab
- 横坐标是时间,纵坐标是频率,matlab绘制时频图的小程序-Time frequency pic