一个可以使用的RocketI/O开发实例。基于Xilinx FPGA Virtex5平台。

ARM处理器的IP核，用verilog编写的，对处理器和相关的CPU架构知识有很大帮助。(ARM processor IP core, written in verilog processor and CPU architecture knowledge.)

说明：  Vivado是Xilinx最新的FPGA设计工具，支持7系列以后的FPGA及Zynq 7000的开发。与之前的ISE设计套件相比，Vivado可以说是全新设计的。无论从界面、设置、算法，还是从对使用者思路的要求，都是全新的。看在Vivado上，Tcl已经成为唯一支持的脚本，此文件是vivado是tcl命令的集合。(Vivado is Xilinx's latest FPGA design tool that supports development of FPGAs and Zynq 7000s in the 7 series and beyond. Compared with the previous ISE design suite, Vivado can be said that the new design. No matter from the interface, settings, algorithms, or from the user ideas, are new. Look at Vivado, Tcl has become the only supported script, this file is vivado tcl command collection.)

基于vhdl的pid控制器设计，可以用quartus等软件实现。数字控制系统pid设计源代码。(Pid controller based on VHDL design, can use the quartus software implementation, etc. Digital pid control system design of source co)

T他的这项工作的目的是调查闩锁，拖鞋，并注册。

采用CORDIC算法的直接数字频率合成器的设计(CORDIC algorithm uses direct digital frequency synthesizer design)

利用verilog写的PWM 程序，来实现产生呼吸灯的效果。(Using xerilog to generate breathing lamp)

verilog实现计时器timer，可直接用于芯片开发中。(verilog achieve timer, it can be directly used for chip development.)

VGA interface using Spartan3E board from DIGILENT.Labview .vi

如上图所示， Rst是低电平有效的系统复位信号，Clk是时钟信号。AB[5：0]是地址信号，DB[7：0]是数据信号，wr是低电平有效的写信号。start是启动信号。 模块中有一个64x8的双端口的存储器。系统复位结束后，可以通过AB、DB和wr信号向同步存储器写入数据。当写入64个数据后，给出一个Clk周期宽度的脉冲信号start，则系统从存储器0地址处开始读出数据，读出的8位数据从低位开始以3位为一组，每个时钟周期输出一组，即第一个时钟周期输出[2：0]位，第二个时钟周期输出[5：3]位，第三个周期输出1地址的[0]位和0地址的[7：6]位，直至将存储器中64x8数据全部输出。若最后一组不足三位，则高位补0。 (As shown above, Rst is an active-low system reset signal, Clk is a clock signal. AB [5: 0] is the address signal, DB [7: 0] is the data signal, wr write signal is active low. start is the start signal. Module in a dual port memory of 64x8. After the reset, you can write data to the synchronous memory by AB, DB and wr signals. When data is written to 64, given the width of a pulse signal Clk cycle start, the system begins to read the memory address 0, 8 data read out a low starting with three as a group, each clock outputs a set period, which is the first clock cycle of the output [2: 0] bits, the second clock cycle output [5: 3] position, the third cycle of the output of an address [0] and 0 address [7 : 6] bit, until all the data in memory 64x8 output. If the last group of less than three, the high 0s.)

用vhdl实现双向移位寄存器 仿真环境MAXPLUS-II，QUARTUS--bidirectional use VHDL simulation environment shift register Segments-II, QUARTUS-