ofdm_system_implementation_by_verilog

数字秒表的设计思路是通过一个计数电路，首先对一个时钟进行不同的分频，然后将分频出的时钟分别送给相的的模块，毫秒计数器，秒计数器，分计数器，时计数器，然后经过译码电路送给数码管，显示出相应数字。具体操作则是通过外部的开关防颤动电路来设计控制器，从而达到对计时模块的控制，完成“计数”、“停止”和“复位”的动作。

通过FPGA驱动千兆以太网口，完成SPARTAN6上的UDP数据包闭环测试，即通过网口发送数据包到FPGA，FPGA内部将接收到的数据返回到PC机，建议测试之前添加ARP静态绑定，FGPA内部的IP以及MAC地址在ROM里的COE文档里可以看到，发送端添加了CRC以及整体CHECKSUM的计算(Driven by FPGA Gigabit Ethernet port, UDP SPARTAN6 data packet on the closed loop test, through the network to send data packets to FPGA, FPGA will receive the data back to the PC, the proposed test before adding ARP static binding, FGPA internal IP and MAC address in the COE document in the ROM where you can see, the sender adds CRC and CHECKSUM integral calculation)

说明：  这是本人曾经参与的一个DDR controller接口项目，主要是FPGA rtl实现，仅供参考。(This is a DDR controller interface project that I once participated in, mainly implemented by FPGA RTL, for reference only.)

FPGA 学习实例 动态时钟、面积、速度优化相关代码(Codes related to dynamic clock, area and speed optimization for learning examples of FPGA)

基于DE2-115的数字时钟 1.液晶显示，数码管显示 2.整点报时 3.闹钟 4.设置时间 5.设置闹钟(Digital clock based on DE2-115 1. LCD display, digital tube display 2. whole point 3. alarm clock 4. setting time 5. set the alarm clock)

matlab代码，利用Farrow结构设计分数延时滤波器，滤波器阶数和个数可分别进行设置，利用最大最小准则近似(Matlab code, using Farrow structure design fractional delay filter, filter order and number can be set separately, using the maximum and minimum criterion approximation.)

说明：  MATLAB的SIMULINK和FPGA联合设计滤波器等，摆脱了传统的代码设计。(MATLAB's SIMULINK and FPGA jointly design filters and so on, and get rid of the traditional code design.)

初学cpu结构的很好的verilog代码的示例，适合初学者(novice cpu structure of the good verilog code examples for beginners)

它是一种算法，它是用来在超大规模集成电路的乘法2

采用xilinx三太以太网ip核，tri-mode MAC完成千兆以太网数据传输(Too Ethernet using xilinx ip three nuclear, tri-mode MAC Gigabit Ethernet data transmission is completed)