Atmel_mp3_USB

数字电压表的源程序，可以实现实现测量电路的电压，精确到小数点后面三位数字。附带数字电压表的流程图(Digital voltage meter source, can be implemented to realize the voltage measurement circuit, down to the decimal point three digits.Attached flowchart of digital voltmeter)

4X4点阵键盘+1602液晶显示做的计算器（AVR单片机）(4X4 matrix keyboard 1602 LCD calculator to do (AVR microcontroller))

基于51的C语言频率计，内涵仿真图，以实现空能(Based on 51 C-language frequency meter, meaning simulation diagram, in order to achieve air can)

串口通信传输与接收。既：发送一个字节到MCU,再由MCU发回来。(Serial communication transmission and reception. Bothto send a byte to the MCU, and then sent back by the MCU.)

介绍了一种SPI从机的接口verilog编码(verilog code for spi slave )

利用stm32上自带的ad和da进行模数和数模转换实验(Use the built-in ad and da stm32 analog to digital and digital to analog conversion experiments)

流水灯程序，在89C52的单片机上让LED灯按照顺序的逐个点亮(Light water program, 89C52 microcontroller on the LED lights lit one by one in the order of)

说明：  四方的通信管理机程序，绝对的超值，很多规约的处理，101 103 103 104 CDT DNP SC1801 CSC2000等，千万别走漏风声啊，(sifang processs protel control center )

增强型实验板配套例程库DS18B20-液晶1602显示温度和控制(Enhanced experimental board supporting routine library DS18B20-LCD 1602 display temperature and control)

at89c2051利用74ls164 驱动 共阳极数码管(74ls164 driver to use a total of at89c2051 digital tube anode)