vhdl经典源代码――键盘接口设计，入门者必须掌握

说明：  FPGA程序的top.v文件，主要实现DDS信号发生器功能，通过定时器，可简单实现输出幅值无极跳变(FPGA procedures top.v documents, the main function of DDS signal generator, through the timer can be simple to achieve the output amplitude wuji hopping)

说明：  this code works with spi and uart interfaces.

说明：  基于fpga的函数发生器设计通过fpga实现正弦波输出(基于fpga的函数发生器)

Verilog HDL的PLI子程序接口，用于与用户C程序在2个方向上传输数据，可用xilinx ISE，quartusii或modelsim仿真，-Verilog HDL PLI subroutine interfaces, for C program with the user in the direction of two transmission of data, available xilinx ISE. quartusii or modelsim simulation,

VerilogHDL教程，很详细全面的Verilog教程，循序渐进，由浅入深，十分好的学习资料(VerilogHDL tutorial, very detailed and comprehensive Verilog tutorial, step by step, progressive approach, a very good learning materials)

AD7685芯片采集程序，可以自行设置采样率，经检验可用。(The AD7685 chip collection procedures, available.)

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.

vga显示彩色图像ip，alter开发板-vga display color image,vhdl,quartus

这个代码主要实现了基于VHDL的关于TV方面的功能。(This code is the main achievement of the VHDL about aspects of the function based on TV.)

verilog实现RTC功能，可直接用于芯片开发中。(verilog achieve RTC function can be directly used for chip development.)