DDS 正弦波发生器

EDA 正弦信号发生器：正弦信号发生器的结构有四部分组成，如图1所示。20MHZ经锁相环PLL20输出一路倍频的32MHZ片内时钟,16位计数器或分频器CNT6，6位计数器或地址发生器CN6，正弦波数据存储器data_rom。另外还需D/A0832（图中未画出）将数字信号转化为模拟信号。此设计中利用锁相环PLL20输入频率为20MHZ的时钟，输出一路分频的频率为32MHZ的片内时钟，与直接来自外部的时钟相比，这种片内时钟可以减少时钟延时和时钟变形，以减少片外干扰 还可以改善时钟的建立时间和保持时间，是系统稳定工作的保证。CNT6用来将32MHZ进行8分频得到4096HZ的频率提供给CN6与data_rom时钟信号。由CLK端输入20MHZ的时钟信号，在DOUT端就可输出稳定的正弦信号。(Sine signal generator has the structure of four parts, as shown in figure 1 below. The 20 MHZ phase lock loop PLL20 output all the way of frequency doubled within 32 MHZ slice clock, 16 counter or prescaler CNT6, six counter or address generator CN6, sine data storage data_rom. In addition to D/A0832 (shown in not draw) will digital signal into analog signals. This design using the phase lock loop PLL20 input frequency for 20 MHZ clock, the output of the frequency of all points frequency of 32 pieces (MHZ clock, and comes directly from the external clock, compared to this piece of clock can reduce the clock in delay and clock deformation, to reduce the interference of Can also improve the establishment of the clock time and keep time, is the system stability of assurance. CNT6 used to will and to 8 MHZ get 4096 HZ dividing the frequency to provide CN6 and data_rom clock signal. The input by CLK 20 MHZ clock signal, in DOUT end can output stable sine signals. )

-&同步FIFO的验证环境。

VHDL实现快速傅里叶变换，内附带资料以及源代码。(VHDL fast Fourier transform, within the supplied data and source code.)

在zedboard开发板上采用vivado通过AXI进行DMA数据传输(Using vivado to transfer DMA data through AXI on zedboard development board)

本白皮书探讨了在PCI Express的因素 技术可能会影响性能。它还 提供指导如何估算 的系统性能。(This white paper explores the factors in PCI Express technology may affect performance. It also provides guidance on how to estimate the system performance.)

这是一个完整的工作模块编码在 verilog 检测的旋转车轮的旋转速度。它也给旋转的方向。这可以在 fpga 板直接实施，此模块内还有一个特别的小模块，以生成测试信号的面积。所以你不需要连接一个车轮与旋转编码器来测试 speedo 米。这就是独一无二的关于此模块 ！！！cheerz!! 享受

说明：  学习FPGA的优秀资料，从基础知识到开发设计再到仿真，很不错的FPGA学习资料(Excellent Teaching Materials for Learning FPGA)

XAPP585 serdes_1_to_7 and serdes_7_to_1 data

在FPGA中编写FPGA芯片与DSP28335进行通信的程序(FPGA chip and DSP28335 written in FPGA communication program)

CIC抽取滤波器，抽取系数8,verilog版本，用于数字下变频(CIC decimation filter, extraction coefficient of 8, verilog version, for digital down-conversion)