vhdl,双向移位寄存器，实现置数，左移及右移操作

数字跑表 该跑表具有启动、复位、暂停、暂停后继续计时等功能 能显示的秒计数时间精确到小数点后第二位，即能显示**.**s 按钮设置防抖-Digital stopwatch in the stopwatch with start, reset, suspend, suspended after the time and other functions can show the seconds counting time accurate to the second place after the decimal point, that can show**.** s Anti-Shake button settings

基于ALINX AX7020硬件平台的USB-OTG通信程序。操作系统采用uCOS III v1.41，基本实现了双向USB2.0 块传输（Bulk Transfer）通信，zynq的PS端接收USB数据并回传至主机。经测试，主机端Window10系统采用libUSBK编程时，采用64字节的块时，传输速率可达210Mbps。zynq开发工具为Vivado2015.4，程序包中包含了全部的硬件和软件工程文档。(A USB-OTG communication project where an AX7020 platform is employed as USB device. The embeded operating system is uCOS III of version 1.41, and the FPGA toolchain is Vivado 2015.4. This project implements a full speed bidirectional USB2.0 bulk transfer. A test on Windows 10 host with libUSBK shows that the transfer speed is up to 201Mbps.)

vhdl code for GIF Image Viewer

这是我上大三时的电子设计题目，叫秒表的功能实现。利用ISE软件进行编程，代码是VHDL语言的，可以实现时（0-9）分（0-59）秒（0-59）即最大10小时的计数，对于不同开发板，可以适当修改代码，使之成为更加广泛的计数器。代码纯原创，请下载。

采用VHDL编写的七段数码管显示程序-prepared using VHDL paragraph 107 of the procedures Digital Display

verilog代码，串口发送接收代码，含有源代码和测试文件，准确可用(verilog code for serial port transmit and receive code, with source code and test files, and accurate available)

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)

龙芯CPU+IP+资源简介，希望大家能够了解自己开发的芯片。(Godson CPU+ IP+ Resource profile, hope that we can understand their own chips.)

基于alteraCPLD芯片的VHDL点阵滚动显示源代码-VHDL-based alteraCPLD chip dot matrix rolling display the source code

FPGA设计的四种常用思想与技巧分享:串并转换设计技巧、流水线设计思想……(FPGA design of four common ideas and techniques)