DE2 development company for the altera board SD_Card_Audio examples

altera官方的各种有用的参考资料，都是自己收集的，遇到问题可以很方便的查看(altera official variety of useful references, are their own collection, problems can easily view)

卷积码编码译码程序以及其modelsim仿真波形文件等(Convolutional code encoding and decoding procedures and the Modelsim simulation waveform file)

基于nios ii 驱动altera de1开发板上的lcd和ps2鼠标模块工程-based on the nios ii drive the lcd and ps2 module of altera de1 develop board

USB3.0开发板资料，采用CYUSB3.0(USB3.0 development board, using CYUSB3.0)

说明：  本人写的数字锁相环，有模拟数据，学习锁相环很好的材料。参考书“数字锁相环路原理与应用”编写。(I write the digital phase-locked loop, have simulated data, a good phase-locked loop learning materials. Reference book )

此代码是SPI接口的Master的Verilog源代码，经上板测试是没有问题的，请大家放心使用 (This code SPI Interface Master of Verilog source code, there is no problem on board test, please rest assured to use)

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.

很多VHDL例子，没有测试，供大家参考-VHDL many examples, there is no test, for your reference

说明：  使用STM32官方提供的DSP库进行FFT，虽然在使用上有些不灵活（因为它是基4的FFT，所以FFT的点数必须是4^n），但其执行效率确实非常高效，看图1所示的FFT运算效率测试数据便可见一斑。该数据来自STM32 DSP库使用文档(. Using the official DSP library provided by STM32 for FFT is not flexible in use (because it is the FFT of base 4, so the number of FFT points must be 4 ^ n), but its execution efficiency is really very efficient, as can be seen from the test data of FFT operation efficiency shown in Figure 1. This data comes from STM32 DSP library usage document)

vhdl source code for 8 bit datapath logic