这是485芯片的USB通信源码，实现和电脑的通信

定义一个抽象类的CShape,包括纯虚数Area(用来计算面积）和SetData（用来重设形状大小）。然后派生出三角形CTriangle类、矩形CRect类、圆CCircle类，分别求其面积。最后定义一个CArea类，计算这几个形状的面积之和，各形状的数据通过CArea类构造函数或成员函数来设置。-Defines an abstract class CShape, including the pure imaginary number Area (used to calculate the area) and SetData (used to reset the shape, size). Then the triangle CTriangle derived class, rectangle CRect class, round CCircle categories, seeking its size. The final definition of a CArea class, calculate the size of the sum of several shapes, each shape data through CArea class constructor or member function to set up.

详细介绍了ARM的架构和应用等各个方面。是PPT格式，图文并茂，讲解详尽，以只读的方式打开即可-Detailed information on the ARM architecture and application and other aspects. Is a PPT format, with illustrations to explain in detail in order to read-only manner open to

A tutorial on pointers and arrays in C

DICOM协议2006版本，英文版；该版本在原来的协议基础上有部分改动，请查看-DICOM version of the 2006 agreement, the English version; The original version of the agreement on the basis of some changes, see

网吧计费系统源码．-Internet Billing System source.

％ 该Matlab程序基于牛顿－拉夫逊算法，用于计算已知导纳矩阵、PQ节点、PV节点、平衡节点(UA)的电力网络潮流 ％ U - 各节点母线电压 S - 各节点注入功率 S_net - 电力网络总损耗 ％ PQ_P - 实算PQ节点注入有功功率 PQ_Q - 实算PQ节点注入无功功率 ％ delt_PQ_P - 实算PQ节点有功功率修正值 delt_PQ_Q －实算PQ节点无功功率修正值 ％ delt_UA_P - 实平衡节点有功功率修正值 delt_U_2 - 实平衡节点电压平方修正值 ％ delt_PQV - 实算P Q U^2修正值 J - 雅可比矩阵 ％ e - 电压实部 f - 电压虚部 delt_ef - 电压实部与虚部修正值- The Matlab program based on the Newton- Raphson algorithm is used to calculate the admittance matrix is known, PQ node, PV node, the node balance (UA) the trend of the electricity networks U- the node bus voltage S- each node injection power S_net-- The total loss of electric power networks PQ_P- operator PQ is injected into active nodes PQ_Q- operator PQ is injected reactive power node delt_PQ_P- is considered the correct value of active power PQ node delt_PQ_Q- really count PQ node reactive power to amend the value of delt_UA_P- real active power balance of the correct value of the node delt_U_2- node voltage balance is the correct value of the square o

一个小程序， 大家看看吧-a small program, we look at it

应用背景如今机器人已经逐渐在社会某些领域崭露头角，无人机、智能车等机器越来越显示出其独有的优势。本设计实现智能小车在跷跷板上保持平衡。关键技术智能小车采用单片机为MCU，外接了轮子，马达等必要器件，采用C语言编程，能够完成上跷跷板、在跷跷板上保持平衡等的功能。

16位ad7705模数转换 好用串口方式 能值接把数读出来-16-bit AD7705 analog-to-digital converter serial-to-use way to access the value of the number of read out

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