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定义一个Circle类，有数据成员Radius（半径），成员函数GetArea（），计算圆的面积，构造一个Circle的对象进行测试。(caculation the area of a circle)

iphone7原理图，很清晰，有需要的可以下载(iphone7_sch,Friends in need can be downloaded to see!)

Arduino working with I2L lcd

1、STM32 CAN总线下的双机数据互传 2、需要配备CAN接收发控制器，例程中采用的是TJA1050(1, dual-data STM32 CAN bus pass each other under 2, CAN controllers need to be equipped to receive hair, routine uses TJA1050)

CPU正在执行一项任务A，然后突然停止任务A去执行任务B，执行完任务B再回来继续执行任务A的过程。(CPU is performing A task. A, then suddenly stop tasks to perform A task B, perform the task B come back again continue to perform the task A process.)

51单片机串口实验，有proteus仿真原理图，一个发送，一个接收(51 microcontroller serial experiments, proteus simulation schematic, a sending, receiving)

英飞凌dave入门学习指南，该文件图文并茂(Infineon Dave entry tutorial files with pictures。)

利用MFC编写的can测试界面，可以对can数据进行设置以及收发测试(Using MFC to write the can test interface, you can set up can data, as well as send and receive tests)

说明：  基于STM32的定时器的一些简单开发和应用(Simple development application of STM32)

说明：  该代码可以对电机运行实现 S型加减速运动,驱动步进电机(This code can realize S-type acceleration and deceleration motion for motor operation and drive stepper motor.)