GW48系统电子琴：可控制8个音节，4种音调 readme中带使用说明

四位拨妞开关作为输入，当输入值变化时将其转化成两位输出(The four DIP Niu switch as an input, when the input value changes, be converted into two output)

一个8X8的矩阵键盘的VHDL文件,并且有长安键和短按键之分,即一共能做到128个键值,扫描用的时钟用1ms的就行了-A 8x8 matrix keyboard VHDL files and have Changan and short keys of key points, namely, to achieve a total of 128 keys, scanning with the clock used on the list of 1ms

《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)

zc706板子原理图，在使用板子时候可以参照设计，使用帮助巨大。(Zc706 board schematic diagram, when using the board can be reference to design, use the help.)

maxplus2为开发环境 vhdl编写的 扫描 程序-maxplus2 VHDL development environment for the preparation of a scanning program

本源码为Nios II的开发示例,主要演示基于Nios II的uCOS的移植。开发环境QuartusII。 本示例十分经典，对基于SOPC开发的FPGA初学者有很大帮助。-The source code for the Nios II development of examples, mainly based on the Nios II shows the uCOS transplant. Development environment QuartusII. This example is very classic, FPGA-based SOPC development of great help for beginners.

一些例子程序需要的话可以下来看看新手推荐-Some examples of procedures can be down if necessary to see novice Recommended

先设计序列发生器产生序列：1011010001101010；再设计序列检测器，检测序列发生器产生序列，若检测到信号与预置待测信号相同，则输出“1”，否则输出“0”，并且将检测到的信号的显示出来。(First design sequence generator sequence: 1011010001101010 redesign sequence detector to detect sequence generator sequence, if the same signal is detected with the preset test signal output " 1" , otherwise " 0" , and the detection display signal out.)

vhdl实现8255,可重用，ALATEK公司提供验证，用说明文档-achieve VHDL 8255, reusable, ALATEK companies to provide certification, with documentation

说明：  QPSK的解调程序，采用Verilog编写而成(QPSK demodulation program, written by Verilog)