用verilog编写实现的以太网控制器（MAC）源码，解压后用ISE打开工程即可。-Prepared using verilog implementation Ethernet Controller (MAC) source code, open the project after decompression can be used ISE.

数字通信原理 曹志刚版的SPI总线硬件描述语言Verilog下的实现，含主模式和从模式的实现，经过仿真验证，可作为一个单独的模块使用--Digital Communication Principles of CAO Zhi-gang version of the SPI bus, under the Verilog hardware descr iption language implementation, including Master mode and slave mode of impl

以太网MAC网卡的Verilog源代码，可以节省TCP/IP协议的设计开发时间。-Verilog source code for Ethernet MAC network card, you can save the TCP/IP protocol design and development time.

verilog gpio you can get the design here for free and very effecient one please download this