nrf2401 FPGA接口驱动

该程序用vhdl编写的vga显示的小游戏，到时屏幕上会显示一个小球，一根棒子，一面墙，棒子可以通过按键控制来移动。而小球在不停的运动，遇到墙会反弹。(Game written by the program with VHDL VGA display, the screen will display a small ball, a stick, a wall, stick to move through the key control. Ball in constant motion, encountered the wall will bounce.)

FPGA／CPLD技术是近年来计算机与电子技术领域的又一场革命。本书以Xilinx与Altera公司的FPGA／CPLD为主，详细介绍了FPGA／CPLD从芯片到MAX+plusⅡ、Quartus与ISE开发环境和Verilog／VHDL语言，并以交通灯逻辑控制、电子钟与点阵LED显示、LCD液晶显示及计算机ISA接口和PCI接口的设计等为例，由浅入深地详述了如何应用FPGA／CPLD进行电子设计。书中的大多数电路图和源程序已经过实例验证，读者可以直接应用于自己的设计。本书的特点是强调实用性和先进性，力求通俗易懂。 本书适用于计算机、电子、控制及信息等相关专业的在校大学生，对广大工程技术人员也具有实用价值。(FPGA/CPLD technology in recent years the field of computer technology and electronic another revolution. Book Xilinx and Altera' s FPGA/CPLD based, detailing the FPGA/CPLD from the chip to MAX+plus Ⅱ, Quartus and ISE development environment and Verilog/VHDL language and logic control traffic lights, electronic bell with dot matrix LED display , LCD liquid crystal display and computer ISA interface and PCI interface design, for example, progressive approach to detail how the application of FPGA/CPLD for electronic designs. Circuit and the source of most of the book have been instances of verification, the reader can be directly applied to their own design. Characteristic of this book is to emphasize the practical and advanced, best straightaway. This book applies to computers, electronics, control and information and other related professional college students, the majority of engineering and technical personnel also has practical value.)

矩阵键盘扫描和led显示 这样子可以得到要输入的键码，并通过led显示出来(KEYBOARD AND DISPLAY LED)

说明：  38译码器，D触发器，全加器，计数器，抢答器，优先编码器，111序列检测器，并行输入转串行输出(poor English. 38 decoder, D trigger, full adder, counter, scrambler, priority encoder, 111 sequence detector, parallel input to serial output)

Ethernet MAC-MII interface of Transmit

LVDS并行数据传输，来自XILINX官网(LVDS Parallel Data Transfer)

说明：  e200 riscv open code user guide

DDR2控制器设计原码,可以在FPGA上测试通过,并对外部的ddr memory进行读写访问.(DDR2 controller design of the original code, can be tested through the FPGA, and external ddr memory read and write access.)

an 16 bit ripple carry adder

VHDL 语言实现 38译码器 文件中包括 程序 源代码 还有 testbench 测试程序(38 decoder VHDL language implementation, including program source code file, there are testbench test procedures)