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说明：  基于STM32的Hart程序,,4_20电流的HART通讯协议程序。(Hart program based on STM32, 4_ HART communication protocol program for 20 current.)

项目用到的STM32F103芯片SPI接口的SD卡读取与改写存储，带文件操作FAT32操作系统，绝对可以用。(The STM32F103 chip SPI interface of the project uses the SD card reading and rewriting storage, and the file operates the FAT32 operating system, which is absolutely available.)

STM32运用PID控制DA输出电压稳定，可以设置。(STM32 using PID control DA output voltage stability, can be set.)

基于stm32的贪食蛇小游戏开发，在LCD显示屏实现了此游戏。算法简洁明了(This game is based stm32 Snake game development LCD display. Algorithm concise)

　Hittite公司以创新的设计使得其PLL产品性能优异，在相位噪声，杂散方面有着卓越表现，其芯片的高集成度使得外围电路简单，设计方便。所以随着电子技术的发展，对频率源的相位噪声性能要求越来越高，Hittite的低相位噪声PLL，在物理、天文、无线电通信、雷达、航空、航天以及精密计量、仪器、仪表等各种领域里都将大有用武之地。(The Hittite companies with innovative design makes the PLL excellent product performance, the phase noise, spurious aspects with excellence, its high integration chip makes the peripheral circuit is simple and easy design. So with the development of electronic technology, phase noise performance of frequency source is more and more high, the Hittite low phase noise PLL, in physics, astronomy, radio communication, radar, aviation, aerospace and precision measurement, instruments, meters and other fields will be great.)

STM32F103控制继电器输出，可扩展应用至其他程序(STM32F103 Control Relay Output)

基于AVR单片机的电阻测试仪，带有LED数码管显示，内有CVAVR 的C编译器和烧写软件，还有程序流程图和源码电路。(Based on AVR microcontroller resistance tester with LED digital tube display, there CVAVR C-compiler and writing software, as well as program flow chart and source circuits.)

实现基于单片的超声波测距。 单片机每隔1秒发送一串40KHz的方波，开中断待接收到回拨时，响应进行报警。(Ultrasonic Distance-based monolithic. SCM every 1 second to send a bunch of 40KHz square wave, open interrupt to be received back, the response of the police.)

这是一个关于有限元的C++程序代码，其中包括线性，非线性，扩展有限元模块，等几何有限元模块(This is a finite element of the C++ program code, including linear, nonlinear, extended finite element module, and other geometric finite element module)

可以产生幅度、频率可调的方波，频率50hz到1M(Can produce the amplitude, frequency adjustable Fang Bo, frequency of 50Hz to 1M)