sdram controller vhdl

AD768产生锯齿波的源码，DA转化的最基本操作。(AD768 sawtooth source code, the basic operation of DA conversion.)

this file describes the steps in building a fifo buffer module in verilog hdl and programming them on an fpga device

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vhdl的基础性的介绍，对初学者大有用处-vhdl basic introduction

基于FPGA的快速傅立叶变换实现，适合fpga工程技术人员参考设计-FPGA-based Fast Fourier Transform for fpga reference design engineers

I2C的实现，可以扩展进而控制有关I2C的器件达到操作员的控制目的。(I2C implementations, can be extended further having control of the I2C device operator control purposes.)

是一个用vhdl语言编写的pwm程序，可以方便地用来和nios连接，实现对nios的功能扩展。-is a VHDL language with the PWM procedures can be used to facilitate connections and nios, nios to achieve a functional extension.

VHDL code for MC68000

基于FPGA的数字钟的设计，外部时钟32MHz，通过分频器得到秒脉冲，用于正常工作时的计数脉冲。通过分频还得到一个5ms的脉冲，用于按键的消抖（具体原理可见程序）。输入的信号有三个：1.时钟信号2.校时模式设置按键3.校时调整按键，输出通道6位数码管。共有：校时模块，24计数的小时计数模块，60计数的分钟计数模块，60计数的秒钟计数模块。

crc校验,经验证正确,下载就可直接用,有不足的地方可以指正,-CRC check, certified correct, you can download directly, there are deficiencies can correct me,