上下LED计数器

模拟地铁自动售票机选票、付款、取票、找零等功能，包含软件仿真和硬件响应，可供仿真测试和FPGA验证。(Analog subway ticket vending machine ballots, payment, tickets, give change and other features, including software simulation and hardware response for simulation and FPGA verification test.)

基于VHDL语言的基带线路码产生电路设计（毕业论文），内涵完整的源代码(Based on VHDL language baseband line code generation circuit design (Thesis), meaning the complete source code)

本代码用verilog语言配合sopc和nios实现了串口调试的目的。软件编程用C语言描述，只是比较简单的例子，适合初学者做了解用，本人亲自在EP2C8Q上实践。(The code to use verilog language sopc and nios achieved with serial debugging purposes. Software programming using C language description, but relatively simple example for beginners to do with understanding, I personally EP2C8Q on practice.)

Verilog reference book

基于xilinx公司的Basys2开发板开发的FPGA数字钟，实现了时钟、闹钟和秒表等功能,同时包含了测试程序。使用Verilog语言编写，开发软件为Xilinx ISE Design Suite 13.4。

verilog数字系统设计，一本很好的verilog学习的书籍，很适合初学者(verilog digital system design, a good verilog learning books, it is suitable for beginners)

RS通用编码器，根据定义的参数以及本原多项式就能实现各种体制的编码，Verilog实现，还附带有限域乘法的实现，代码清晰，精炼

4选1数据选择器，有使能端控制，4个数据输入，2个地址端，1个输出(4 1 data selector, enable end control, four data inputs, two addresses end, an output)

说明：  配置GTH ip的例子工程，选用7 series 芯片的GTH 113quad的四个通道，在程序中每个链路利用自己的恢复时钟进行数据解码，所以四个通道可以各自独立运行；成功工作在2.54Gb/s的链路状态，长时间（>24小时）的测试，误码率一直为0.(The GTH ip example project is configured with four channels of the GTH 113quad of the 7 series chip. Each link in the program uses its own recovery clock for data decoding, so the four channels can operate independently; the successful operation is at 2.54Gb/ The link state of s, long time (>24 hours) test, the bit error rate has been 0.)

说明：  Verilog教程，小梅哥FPGA自学与验证(a basic book of how to learn Veriolg)