KeyDown_tester

实现数码管0-7的静态显示，采用c语言编写。(play led)

说明：  AD5933模块负阻抗测试程序，C语言Keil编译(AD5933 Impedance Test Program)

全场地位系统：小车静止或移动过程中码盘进行全场定位,用的是avr单片机(Overall status of the system: stationary or moving vehicle to carry out the whole process of positioning)

说明：  可以研究基于RSSI的TDOA声音定位算法(Sound source location algorithm of the 15th beacon car of Feisi)

测量单片机频率，可以测量周期波的频率，最大可以测到60khz(Measuring Frequency of Single Chip Microcomputer)

说明：  本工程利用STM F103zet生成SPWM波(this project use stm32 h103zet create spwm wave)

Code GPS to LCD By C code

MCS-51系列单片机Wifi模块视频小车C语言源程序(MCS-51 series microcontroller Wifi module video car C language source code)

单片机向串口调试助手发送温度值，DQ接口连接单片机的PA0，开发环境为Keil(Single Chip Microcomputer sends temperature value to Serial debugging Assistant.DQ interface to PA0 interface of single chip microcomputer.The development environment is Keil.)

按键是单片机系统最常用的输入设备之一；几乎是只要需要交互输入，就必须有键盘。本程序提供最常用的4*4矩阵键盘的程序，和4个按键的程序。 (The key is one of the most commonly used input devices MCU system it is nearly as long as the need for interactive input, it must have the keyboard. This program provides the most commonly used 4*4 matrix keyboard program, and 4 key procedures.)