高级加密标准AES的FPGA实现，支持128，256密钥长度格式

本文以FPGA为硬件平台，基于EDA工具QUARTUSⅡ为软件平台上对HDB3编/译码进行实现。由于在EDA的软件平台QUARTUSⅡ上不能处理双极性的信号，因此对HDB3码的编/译码的实现分为：软件部分和硬件部分。软件部分是基于QUARTUSⅡ的平台上对输入的码元进行编码和译码，通过系统仿真，验证了HDB3码的编译码的正确性；硬件部分采用CD74HC4052双四选一的数模选择器实现单极性到双极性的转换；采用AD790和SE5539实现双极性到单极性的转换。最后，通过仿真，验证了方案的正确性。

FPGA的经典例程，可以进行移植和借鉴使用(FPGA' s classic routines, can be transplanted and learn to use)

class diagram diagram for AIRS

System Verilog for design verification

M25P64-SPI-FLASH芯片的FPGA控制程序，已仿真验证(M25P64- SPI- FLASH chip FPGA control program, simulation)

低通滤波器（由matlab和simulink两种方法实现）源文件及图片示例(Low-pass filter) source file and photo examples (by the two methods matlab and simulink)

这是一个用VHDL语言描述的I2C自动配置模块，使用了来自opencores.org的I2C核，已在altera的cyclone芯片上调试通过-This is a VHDL language used to describe auto-configuration of the I2C module, the use of the I2C from opencores.org nucleus, the cyclone in the altera-chip debugging through

vhdl的基础性的介绍，对初学者大有用处-vhdl basic introduction

VHDL教程及源码,是新手入门的不二选择!-VHDL Tutorial and source code is the only option, beginners!

说明：  一种基于FPGA的调频连续波方位向多通道 FMCW SAR的实时成像信号处理方法及FPGA，包 括：步骤一、计算重构矩阵；步骤二、重构方位向 多通道数据，包括：步骤2 .1、对各个通道的回波 数据沿方位向分别间隔补零，并进行方位向傅里 叶变换；步骤2 .2、将方位向傅里叶变换之后各个 通道方位向相同位置的点组合为一个向量并与 重构矩阵相乘，得到重构完成的方位向数据；(An azimuth multichannel FMCW based on FPGA FMCW SAR real-time imaging signal processing method and FPGA, package Including: Step 1: calculate the reconstruction matrix; step 2: reconstruct the orientation Multichannel data, including: step 2.1, echo of each channel The data is compensated with zero along the azimuth direction respectively, and the azimuth Fourier is carried out Step 2.2, after the azimuth Fourier transform The points of the same position in the channel azimuth are combined into a vector and are connected withThe reconstruction matrix is multiplied to get the reconstructed azimuth data Step 2.3. Repeat step 2.3 for the data of different distance gates)