象棋C

这是对广义高斯分布中两个参数alpha,beta的估计方法，对自然图像的大量统计特征就符合这一分布。(function [f, g] = dggbeta(beta, absx) DGGBETA Derivative of generalized Gaussian pdf with respective to beta [F, G] = DGGBETA(BETA, ABSX) Return partial derivative and second order partial derivative This is an utility function for GGMLE ABSX is the distance of the data from the mean Function is undefined for negative beta if beta <= 0 f = NaN g = NaN )

对电脑鼠的介绍以及阐述，从最简单到如梦，为介绍性材料(The introduction of the computer mouse and to describe, from the most simple to the dream, the introductory material)

说明：  基于ALINX AX7020硬件平台的USB-OTG通信程序。操作系统采用uCOS III v1.41，基本实现了双向USB2.0 块传输（Bulk Transfer）通信，zynq的PS端接收USB数据并回传至主机。经测试，主机端Window10系统采用libUSBK编程时，采用64字节的块时，传输速率可达210Mbps。zynq开发工具为Vivado2015.4，程序包中包含了全部的硬件和软件工程文档。(A USB-OTG communication project where an AX7020 platform is employed as USB device. The embeded operating system is uCOS III of version 1.41, and the FPGA toolchain is Vivado 2015.4. This project implements a full speed bidirectional USB2.0 bulk transfer. A test on Windows 10 host with libUSBK shows that the transfer speed is up to 201Mbps.)

csr8670开发中对初学者一些有用的资料(Some useful information for beginners in csr8670 development)

C++中对EXCEL的操作，包含绝大部分EXCEL的功能，如单元格格式操作等。(There has been the C++ project BasicExcel for quite some years now. It is very useful to read and write Excel sheets in .xls format. However, it contains only very basic functionality. There are missing features like text formatting using fonts, and display formats and formulas are not yet supported. This article covers this additional functionality. The new, derived project ExcelFormat is based on the old BasicExcel code, and just adds what I was missing for my own needs. If you want to see where I am using the new library, you can look at the Export functions of Service Manager and Uninstall Manager.)

说明：  用C语言写的100行DES加密算法 运行环境 9x/Me/NT/2000/XP(C language written in 100 lines DES encryption algorithm operating environment 9x)

实现STM32单片机使用RDA5807M型号的芯片收音机，代码通过简单的移植，就可以使用。(Implement STM32 MCU chip radio RDA5807M model code by simply transplant, it can be used.)

USB FS HID for PSoC3,5

本代码为基于STM32单片机的am2322温湿度传感器驱动代码，已经经过本人优化，并已经测试通过，可以直接用于采集温湿度信息，本代码采用keil5编程软件，下载解压后即可使用。 (本代码为基于STM32单片机的am2322温湿度传感器驱动代码，已经经过本人优化，并已经测试通过，可以直接用于采集温湿度信息，本代码采用keil4编程软件，下载解压后即可使用。(This code is based on the STM32 MCU am2322 driver code, temperature and humidity sensor has been optimized himself, and has been test pass, temperature and humidity can be directly used for collecting information, this code USES keil5 programming software, after download decompression can use. (this code is based on the STM32 MCU am2322 driver code, temperature and humidity sensor has been optimized himself, and has been test pass, temperature and humidity can be directly used for collecting information, this code USES keil4 programming software, after download decompression can use.)

脉冲宽度调制是利用微处理器的数字输出来对模拟电路进行控制的一种非常有效的技术，广泛应用在从测量、通信到功率控制与变换的许多领域中。脉冲宽度调制是一种模拟控制方式，其根据相应载荷的变化来调制晶体管基极或MOS管