四种常用FPGA设计技巧，包括乒乓结构等。

用verilog编写的USB下载线程序 实现USB协议和JTAG接口的数据转换实现状态机-Verilog prepared using USB download cable program realize USB protocol and JTAG interface to achieve data conversion state machine

verilog编写的QPSK发射机的ＦＰＧＡ部分，已经过验证，完全达到要求。调制矢量误差４％(QPSK transmitter verilog prepared by the FPGA portion, has been proven, fully meet the requirements. Modulation vector error of 4 )

关于I2C总线协议的verilog代码，里面包括了3个verilog代码(I2C bus protocol verilog code, which includes three verilog code)

本例为电子琴VHDL程序原代码,电子琴,可实现基本功能-In this case the procedures for organ VHDL source code, organ, can realize the basic functions of

STOPWATCH FPGA SEVEN SEGMENT DISPLAY

说明：  SPI协议的芯片验证VIP,用UVM搭建平台验证代码(Chip verification VIP of SPI protocol, build platform verification code with UVM)

user_logic_VGA_Controller，适合于DE2开发板，把这个文件夹放在工程目录之中，就可以在SOPC里直接添加VGA_Controller IP核了，很方便使用。-user_logic_VGA_Controller. suitable for Dictyophora development board, this folder on the project directory, it can be added directly SOPC Lane VGA_Controller IP core, very convenient to use.

IIC总线协议，VHDL语言编写，可以直接使用-IIC bus protocol, VHDL language can be used directly

Very good info. for RS-232 echo VHDL code .