12864huaxian

一个数字类型可提高开关电源的设计与实现，可以是很好的借鉴，但是要用特殊软件打开，把文件后缀复制到百度就可以找到(A digital type can increase the switching power supply design and implementation, can be a good reference, but use special software to open, copy the file suffix can be found on Baidu)

超声波测距（5 28线性处理）,测量线性度很高(Ultrasonic Ranging (528 linear processing), high linearity measurements)

说明：  基于MODBUS协议的单片机通信系统，上位机+下位机(MODBUS Protocol-based communication system microcontroller)

一台安捷伦的N9020A频谱分析仪，所带的例子是GPIB连接的，现在用LAN来连接。 (Agilent N9020A spectrum analyzer, the example brought to GPIB connection, use the LAN to connect.)

Wireless Engineering and Technology vol.6, num.3, 2015, 37pages ISSN : 21522294

说明：  这是一个使用了8位移位寄存器HC595的电子钟程序，里面包括了仿真程序。以及HC595的操作说明。(This is a used 8-bit shift register of the electronic bell HC595 procedures, which include the simulation program. As well as instructions HC595.)

基于STM32F4的四轴航拍平台。以STM32F407为控制核心，四轴飞行器为载体，辅以云台的航拍系统。硬件上由飞控电路，电源管理，通信模块，动力系统，机架，云台伺服系统组成。算法上采用简洁稳定的四元数加互补滤波作为姿态解算算法，PID作为控制器，实现飞行，云台增稳等功能(Four axis aerial platform based on STM32F4. Taking STM32F407 as the control core, the four axis flying vehicle as the carrier, and the aerial camera system with ptz. The hardware is composed of flight control circuit, power management module, communication module, power system, frame and PTZ servo system. The algorithm uses a simple and stable four yuan number plus complementary filtering as the attitude calculation algorithm, and PID is used as a controller to achieve flight, PTZ stability, and other functions)

状态机按键检测，实现单击双击多击功能,单片机用的是STM8L(Key detection state machine to achieve multi-click-click, double-click function)

根据对应的按键值，对应输出相应的电容值，并做掉电检测(According to the corresponding key value, corresponding to the output of the corresponding capacitance values ​ ​ and do brownout detection)

28335的spwm输出，开环测试，三相spwm信号分别为epwm1~6，频率为20KHz(spwm output 28335, the open-loop test, three-phase spwm signals are epwm1 ~ 6, frequency 20KHz)