四VHDL模块的家庭，已经过测试，在ISE8.1通过

设计一个简单的FIR滤波器，并按要求确定滤波器的系统函数。(Design a simple FIR filter, and determine the filter according to the requirement of system function.)

完成一个FIR数字滤波器的设计。要求： 1、 基于直接型和分布式两种算法。 2、 输入数据宽度为8位，输出数据宽度为16位。 3、 滤波器的阶数为16阶，抽头系数分别为h[0]=h[15]=0000，h[1]=h[14]=0065，h[2]=h[13]=018F，h[3]=h[12]=035A，h[4]=h[11]=0579，h[5]=h[10]=078E，h[6]=h[9]=0935，h[7]=h[8]=0A1F。 -Completion of a FIR digital filter design. Requirements: one, based on the direct type and distributed two algorithms. 2, input data width of 8, the output data width of 16. 3, filter order of 16 bands, tap coefficients for h [0] = h [15] = 0000, h [1] = h [14] = 0065, h [2] = h [13] = 018F , h [3] = h [12] = 035A, h [4] = h [11] = 0579, h [5] = h [10] = 078E, h [6] = h [9] = 0935, h [7] = h [8] = 0A1F.

说明：  基于OV7670采集，SDRAM缓存，sobel处理，VGA显示的工程，内有全部代码，基于QUARTUS开发板实现。 FPGA 边缘检测(Based on OV7670 acquisition, SDRAM cache, sobel processing, VGA display project, with all the code, based on QUARTUS development board. FPGA edge detection)

FPGA连接PCI9504的电路图。以及PCB文件(FPGA connected to the circuit diagram of the PCI9504. And PCB files)

Xilinx Licenses 2018

EP2C35A实验箱基于NIOSII的串行AD_DA编程(EP2C35A experimental box based NIOSII the serial AD_DA programming)

Great guide for writing VHDL

This is counter with T_FF.

alteral FPGA VERILOG 利用 ROM DCFIFO 和RAM 实现高速到低速时钟域的数据传输 ，值得学习。-alteral FPGA VERILOG using ROM DCFIFO and RAM to realize high-speed low-speed clock domain data transfer, it is worth learning.

利用单片机控制LED时钟显示，以及闹钟，程序较大，但比较简单易懂。(LED clock display)