基于vhdl开发的频率发生器

说明：  HDB3编码通过verilog实现，通过modelsim仿真(HDB3 coding is implemented by Verilog and simulated by Modelsim)

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

本模块的功能是验证实现和PC机进行基本的串口通信的功能。需要在PC机上安装一个串口调试工具来验证程序的功能。程序实现了一个收发一帧10个bit（即无奇偶校验位）的串口控 //制器，10个bit是1位起始位，8个数据位，1个结束 //位。串口的波特律由程序中定义的div_par参数决定，更改该参数可以实 //现相应的波特率。程序当前设定的div_par 的值是0x145，对应的波特率是 //9600。用一个8倍波特率的时钟将发送或接受每一位bit的周期时间 //划分为8个时隙以使通信同步. //程序的工作过程是：串口处于全双工工作状态，按动key1，FPGA向PC发送“21 EDA" //字符串（串口调试工具设成按ASCII码接受方式）；PC可随时向FPGA发送0-F的十六进制 //数据，FPGA接受后显示在7段数码管上。 //视频教程适合我们21EDA电子的所有学习板(this is a base vhdl for uart progarm.)

16点FFT，简单易理解，适合初学者了解(16 point FFT, simple and easy to understand, suitable for beginners to understand)

vhdl的仿真 quartus 2的flv视频 -VHDL simulation of the flv video quartus 2

VHDL handbook is very nice and suitable guide to HVDL language

FPGA控制m25p16flash芯片读写控制spi协议 可实现擦除写入读出功能(SPI protocol for read and write control of m25p16 flash chip controlled by FPGA Erase Write-Read Function)

该程序使用Verilog语言产生LFM信号(The program uses Verilog language to generate LFM signals.)

基于FPGA的交通灯代码，VHDL语言书写。适合新手学习vhdl语言时使用(FPGA-based traffic light code, VHDL language writing. Suitable for novice learning vhdl language used when)

this a fpga sparttan 3e based project in which i have made a game based on vga interface . this file is the supporting file for keyboard interface and it also included a intro.vhdl file required for the startup animation file.-this is a fpga sparttan 3e based project in which i have made a game based on vga interface . this file is the supporting file for keyboard interface and it also included a intro.vhdl file required for the startup animation file.