VHDL数字频率计（1）频率测量范围： 10 ～ 9999Hz 。 （2）输入电压幅度 >300mV 。 （3）输入信号波形：任意周期信号。...

一个在Xilinx spartan3实现的时钟，具有时分秒的计时显示以及年月日的显示，很有参考价值-A Xilinx spartan3 realize the clock, with time-accurate time display and date display, a good reference

硬件描述语言VHDL的频率计程序,可用于做实验,或者初学者借鉴.-Hardware Description Language VHDL of the frequency counter program can be used for experiments, or the beginners learn.

说明：  传感器是一种检测装置，能感受到被测量的信息，并能将感受到的信息，按一定规律变换成为电信号或其他所需形式的信息输出，以满足信息的传输、处理、存储、显示、记录和控制等要求(Sensor is a kind of detection device, which can sense the measured information and transform it into electrical signal or other required information output according to certain rules to meet the requirements of information transmission, processing, storage, display, recording and control.)

文章详细讲述了sdr_sdram控制器的使用和编程思想(sdr_sdram)

开源软核处理器OpenRisc的SOPC设计

ARM处理器的IP核，用verilog编写的，对处理器和相关的CPU架构知识有很大帮助。(ARM processor IP core, written in verilog processor and CPU architecture knowledge.)

带有电网电压反馈的单相PWM整流器反馈，输出的波形很好，适合初学者学习观摩(With power grid voltage feedback single-phase PWM rectifier feedback, the output waveform is very good, suitable for beginners learning view )

8位加减器，八位减法器与加法器，用过一个控制端可以自由变换，采用移位加法方式，用途广泛，利用减法位补码加法的理论实现。(8 addition and subtraction, eight subtractor and adder, used a control terminal can freely change the using Shift addition, a wide range of uses, the use of subtraction complement addition theory to achieve.)

几个fpga竞赛的设计例-Several Example FPGA design contest

该程序用vhdl编写的vga显示的小游戏，到时屏幕上会显示一个小球，一根棒子，一面墙，棒子可以通过按键控制来移动。而小球在不停的运动，遇到墙会反弹。(Game written by the program with VHDL VGA display, the screen will display a small ball, a stick, a wall, stick to move through the key control. Ball in constant motion, encountered the wall will bounce.)