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nRF51822低功耗蓝牙4.0资料和设计指导说明。(nRF51822 BLE bluetooth 4.0 desgin guide)

读写器与射频卡通信的设计采用RC522射频读写芯片与射频卡进行通信，符合ISO14443规范协议；硬件系统设计中主要有AVR单片机主控模块、电源模块、存储模块、外部时钟模块、LCD模块；软件系统设计采用C语言，遵循模块化和结构化编程模式，设计了射频卡操作程序、软关机与自动关机程序、LCD显示、串行Flash存储器、外部时钟等外部设备驱动程序。所设计的手持式读写器具备对MF1 S50、S70射频卡的读写、实时状态显示、系统在线升级以及关机等功能。(This handset can process the data offline or online, reading and writing from 10 cm far. This handset is low-power, miniature, modular design and so on. This article includes: the communication design between RF card and Reader, hardware system design and software systems design. The communication design between RF card and Reader used to RC522 RF chip control RF cards, in line with ISO14443 standard protocol Hardware system design mainly include AVR microcontroller control modules, power modules, memory modules, external clock modules, LCD modules Software system designed with C programming language, and follow the modular structure of the programming model, and has the RF card operation procedures, soft shutdown and automatic shutdown procedures, LCD display, serial Flash memory, an external clock, and other external device driver Procedures. The handset readers has the MF1 S50, S70 RF card reader function, real-time status display function, the system online update function and so)

12C5A60S2 EEPROM 的读写操作(12C5A60S2 EEPROM read_write)

中航信ETERM放大器，C++ 支持350，443端口，分享一下，一起学习(CNAC letter ETERM amplifiers, C++ 350,443-port, share, learn together)

手持振动仪，自动通过傅里叶变换，提取峰峰值，来自动调整震动的幅度，(Handheld vibration, automatic Fourier transform, peak extraction, to automatically adjust the amplitude of vibration,)

编程菜鸟学习用的蜂鸣器播放八月桂花香声音(Programming rookie learning the buzzer with sound playback 八月桂花香)

该程序是CRC校验程序，可以查看文件的校验和，这对文件本身进行校验，也可用在其它程序中检难数据正确与否(CRC procedures can view the document and check that the document itself calibration, but also can be used in other programs Frederick hard data are correct or not)

robot Puma 365 controlled by PID Fuzzy

基于C51单片机的波形信号发生器：矩形波，方波，三角波。包含单片机仿真。(Based on the C51 single-chip waveform signal generator: square wave, square wave, triangle wave. Contains simulation microcontroller.)

It was a ATmega128 Sleep mode and awake mode programed by avr studio4