这是“VHDL设计”讲稿，希望对初学者有用，

8位crc的verilog设计 通过仿真综合验证并已应用在工程里面 (verilog of 8bit error checkout )

用Verilog描述了一款简单逻辑芯片74HC595的功能该芯片功能为：带输出锁存的8位移位寄存器(use the verilog to describe a simple chip 74HC595 with 8-Bit Serial-In, Parallel-Out Shift Reg and High-Current 3-State Outputs Reg)

频率计 测量范围1-100MHz 测量阈值0.1s 计数部分为FPGA/CPLD 语言VHDL 显示部分为51 单片机加八位数码管 语言C(Frequency meter Measuring range 1-100 MHZ Measure threshold is 0.1 s Count part of FPGA/CPLD Language VHDL Display part of 51 MCU with eight digital tube Language C)

16次迭代的CORDIC算法，精度很高，可应用于计算反正切值(16 iterations of the CORDIC algorithm, high accuracy, can be applied to calculate arctangent)

《CPLDFPGA嵌入式应用开发技术白金手册》源代码，涉及FPGA/CPLD的各个方面，键盘扫描，LED扫描等简单程序及滤波器等的设计(" CPLDFPGA platinum embedded application development technology handbook" source code, related to FPGA/CPLD all aspects of the keyboard scanning, LED scanning filters, such as simple procedures and design)

master spi的源代码（verilog），包括文档，测试程序(master spi the source code (verilog), including documentation, testing procedures)

使用verilog在fpga开发板实现流水灯，包括整个工程文件(This code is used for early learners to study verilog。)

说明：  Micron公司m73a系列nand flash仿真模型及测试文件(micron m73a series nand flash simulation model and testbench)

4*4按键扫描电路，用数码管显示0~F，基于VHDL语言设计，包括按键扫描，数码管扫描，数码管显示，按键消抖等代码

SPI接口的实现以及对外设的读写操作，其中包扩了几种工作方式，同时可以读取外设的版本号，传输速率可以达到2Mbps-SPI interface implementation, as well as read and write operations on the peripheral, which extended several work packages at the same time can read the version number of peripherals, transfer rate up to 2Mbps