在quartus软件下用VHDL语言实现DDS，可产生正弦，余弦，方波，三角波以及锯齿波。

用verilog HDL编写的SPI控制器，从国外网站上找到的。-SPI (Serial Peripheral Interface) is serial, synchronous, full duplex communication protocol. It is widely used as a board-level interface between different devices such as microcontrollers, DACs, ADCs and others.

4选1数据选择器，有使能端控制，4个数据输入，2个地址端，1个输出(4 1 data selector, enable end control, four data inputs, two addresses end, an output)

Demo program for use UART STM8S

verilog例子，有130多个，值得参考，新手很有帮助-Verilog example, there are more than 130, it is also useful, very helpful to novice

说明：  Fully parametrizable combinatorial parallel LFSR/CRC module. Implements an unrolled LFSR next state computation. Includes full MyHDL testbench.

verilog 232串口收发程序 在开发板上测试成功过-verilog 232 serial port transceiver program already had some success in the development of on-board test ^ ^

FPGA按键加蜂鸣器实验： 加延时防抖+蜂鸣器(Experiments of keys and buzzers in FPGA)

NIOS II IDE 编程， 定时器测试程序，仅供参考。-NIOS II IDE programming timer testing procedures, for information purposes only.

Verilog-HDL程序设计实用教程收集，内容丰富，设计技巧多样。-Verilog-HDL Design Tutorial practical collection, rich in content and variety of design skills.

设计含异步清零和同步时钟使能的加法计数器-Clear design with asynchronous and synchronous clock so that the adder counter