modelsim设计的可调占空比的方波程式

SPI接口测试程序，Xilinx参考设计，ML507硬件测试通过.(SPI interface test code，Xilinx reference design，tested on ML507 platform.)

SPI的Verilog实现(非常的全面和详细，还带有SPI算法的注解)(SPI in Verilog implementation (a very comprehensive and detailed, but also with the SPI algorithm annotation))

用Verilog HDL编写的PID程序代码，成功调试，运行良好。(The source code of PID in Verilog HDL.Simulation was successful.)

出租车vhdl程序，并带有testbench仿真程序，通过开始按键复位，然后根据行使信号进行公里计数，起步价3公里8元钱，超过3公里一公里1元钱(Taxi vhdl program, with a testbench simulation program, started by the reset button, then the exercise kilometer count signal, starting at 3 km 8 yuan, more than three kilometers one kilometer dollar.)

UART program for fun(UART)

实现简单的硬件加法器、除法器，实现源码文中注释(Realize simple hardware adder and divider, realize source code)

本书作者为夏宇文，详细讲解了从算法设计与验证到硬件逻辑实现的过程，要求读者有一定的verilog基础(This book author XIA Yu-Wen gave a detailed account from algorithms to hardware logic design and verification of implementation process, requiring readers to have some basis for verilog)

有关gal器件的编程入门，以及常见逻辑门、计数器VHDL程序(For gal device programming entry, as well as common logic gates, counters VHDL program)

基于VHDL的FPGA开发快速入门·技巧·实例 ,电子工程师创新设计必备宝典系列之FPGA开发全攻，未来，FPGA 开 发能力对工程师而言将成为类似C 语言的基础能力之一，面对这样的发展趋势，你还能简单地将FPGA 当成一种逻辑器件吗？还能对FPGA 的发展无动于衷吗？(基于VHDL的FPGA开发快速入门·技巧·实例 )

de2,altera fpga