IA4421 module using a wireless transceiver, microcontroller. Sending and receivi...

用AVR单片机实现的音乐程序，使用C语言写的-AVR MCU with the music, the use of the C language to write

两个点的线性插值定点数算法 说明：1、基本公式 y=( y2-y1 ) ( x-x1 ) / ( x2-x1 ) + y1 2、根据直线斜率的正负、内插外插的不同，分为6种情况。 3.参见文件夹中的“插值算法的6种情况”一图。-two points of linear interpolation algorithm for determining points : one, the basic formula y = (y2- y1) (x-x)/(x2- x1) y1 2, according to the slope of the linear positive and negative, interpolation, extrapolation of different, divided into six kinds of situations. 3. See folder "interpolation algorithm for the six species of" a map.

6位数码管显示的频率计，外部方波接到P3.4（T0），测试通过-6-bit digital tube display of the frequency counter, the external square wave received P3.4 (T0), the test

Verilog实现的DDS正弦信号发生器和测频测相模块，DDS模块可产生两路频率和相位差均可预置调整的值正弦波，频率范围为20Hz-5MHz，相位范围为0°-359°，测量的数据通过引脚传输给单片机，单片机进行计算和显示。-Verilog realize the DDS sine wave signal generator and frequency measurement module test phase, DDS module can generate both frequency and phase difference can be preset to adjust the value of sine wave, frequency range of 20Hz-5MHz, phase range of 0 °-359 ° , measurement data and transmit them to the single-chip pin, single-chip microcomputer to calculate and display.

这是AD转换芯片AD7705的初始化程序，主要是寄存器的配置-This is the AD conversion chip AD7705 initialization procedure is the configuration register

时钟芯片PCF8563的51单片机程序 时钟不超过12MHZ，本程序已在51上试过，可以用-PCF8563 clock chip clock of 51 single-chip program does not exceed 12MHZ, this procedure has been tried in the 51

本程序是一个数字电压表的程序，可运行于iar环境下，适用于msp430的单片机-This procedure is a procedure for digital voltage meter can be running on iar circumstances, apply to MSP430 microcontroller

此为友善之臂micro2440板的底板原理图，更新时间是2009年2月28日。-This is a friendly arm on the Backplane board micro2440 schematic, update time is February 28, 2009.

单片机设计的遥控电路，遥控码的脉宽数用红外线接收器解码后送单片机读入，发射时由单片机产生40KHZ红外调制信号送红外线发射管发射-Single-chip design of the remote control circuit, remote control code number of the pulse width decoder using infra-red receiver to read single-chip evacuation, launch generated by single-chip modem 40KHZ IR signal sent to the launch tube fired infra-red.

KeilC51manual