functions

SIM900A的EAT开发，文档中的源码实现功能比较多。Adc，audio play,csd,customerATCommand,DTMF,fcm,flash,gpio,gpio interrupt,http,i2c,keypad,pwm,serialPortStatus,SIM_MUX,sms,socket,spi,spienhance,system,TCP,timer,update,urc(SIM900A EAT development, in the document source more functionality.Adc, audio play, CSD, customerATCommand, DTMF, FCM, flash, gpio, gpio interrupt, HTTP, i2c, keypad, PWM, serialPortStatus, SIM_MUX, SMS, socket, spi, spienhance, system, TCP, timer, update, the urc)

stm32103RB资料(参考代码)标准例程，包括源代码和pdf解析，有灯，按键，终端，PWM，显示屏，adc，iic，spi，flash，usb等等56个实验例程(Stm32103RB data (reference code) standard routines, including source code and PDF parsing, with lights, keys, terminals, PWM, display, ADC, IIC, SPI, flash, USB and so on 56 experimental routines)

说明：  利用压电超声导波时间反转法的管道结构裂纹监测研究(Study on the Crack Monitoring of Pipeline Structures Using Piezoelectric Ultrasonic Guided Wave Time Reversal Method)

LED显示屏3，软件理解研究等，互相学习(3 LED display, software research to understand, learn each othe)

silabs的芯片si1010的发射频谱等文件，我看本站只有si1000的却没有si1010的，故此奉献(emission spectrum and other documents silabs chip si1010, I see only the site but no si1010 si1000, and therefore dedication)

这是Keil C51中的两个例子，对于刚刚接触Keil C51的人来说这两个例子非常有用 (This is the Keil C51 two examples, For contact Keil C51 just who these two examples very useful)

机器人PID控制，对于机器人而言，PID控制是比较简单且行之有效的控制方法，在工业机器人中得到了广泛的应用。(PID control robot, the robot terms, PID control is a relatively simple and effective method of controlling the industrial robot has been widely used.)

利用单片机实现快速傅里叶变换 基于单片机对数据的采集(Fast Fourier transform using MCU Microcontroller based data acquisition)

pid温控c程序算法，这是一个比较典型的PID处理程序，在使用单片机作为控制cpu时，请稍作简化，具体的PID参数必须由具体对象通过实验确定。由于单片机的处理速度和ram资源的限制，一般不采用浮点数运算，而将所有参数全部用整数，(pid temperature control algorithm c program)

说明：  STM32F407的HID设备模板，已经测试通过。(The HID device template of STM32F407 has been tested and passed.)