四种常用FPGA设计技巧，包括乒乓结构等。

Vhdl Golden Reference Guide.pdf

说明：  demo6 蜂鸣器实验 蜂鸣器演奏音乐(demo6 buzzer buzzer experiment playing music)

spartan-3e vhdl fpga 输入用滑动按钮代替 输出用led代替(spartan-3e VHDL fpga input with sliding button instead of the output with led instead)

示波器的源码,基于串行口的,(oscilloscope source code, based on the serial port,)

频率计 测量范围1-100MHz 测量阈值0.1s 计数部分为FPGA/CPLD 语言VHDL 显示部分为51 单片机加八位数码管 语言C(Frequency meter Measuring range 1-100 MHZ Measure threshold is 0.1 s Count part of FPGA/CPLD Language VHDL Display part of 51 MCU with eight digital tube Language C)

实现PWM波型....使用VHDL语言-Realization of PWM waveform using the VHDL language ....

sd_sdram_lcd 是读取SD卡中的数据，然后通过LCD显示(It is to read the data in SD card and display it by LCD)

正弦信号发生器，用VHDL来完成，抗干扰能力较强，(Sinusoidal signal generator, using VHDL to accomplish, a strong anti-interference ability,)

ATSC发送端部分，ATSC标准特有的TCM编码，共6个文件，包含tb文件，已通过仿真，没有问题，verilog代码-ATSC transmitter, the ATSC standard TCM unique coding, a total of six documents, tb-contained documents, had passed through simulation, no problem, verilog code

文件中包含BFSK、DPSK、BPSK、QPSK等等数字调制程序。(File contains the BFSK, DPSK, BPSK, QPSK, and so on digital modulation process.)