super fast debounce button on vhdl, xilinx xc

1、ps/2键盘输入，通过led显示ascii码 2、稍等1s可以在lcd上显示输入的字符 3、其中键盘上的backspce键是用来清屏的 4、当lcd上显示满字符时，在按下按键自动清屏，从第一行显示。-1, ps/2 keyboard input, through the led display ascii code 2, wait 1s in the lcd display characters input 3, which backspce keys on the keyboard was required to settle the screen 4, when the lcd display full of characters, the press the button automatically Qing-ping, from the first line of display.

在fpga中对于pll无法完成的分频，可采用计数方式，本例用状态机实现对时钟的奇数分频。(Pll in fpga can not be completed in the sub-frequency counting method can be used, in this case with the state machine to achieve an odd number on the clock frequency.)

简单uart，verilog语言编写，已经经过测试，有需要的可以看看(Simple uart, Verilog language, has been tested, you can see if you need it)

基于Verilog HDL的完整数字跑表工程，在试验机台上运行验证通过了的。 用8位7段数码管分别显示微妙，秒，分。 有开始，暂停，复位功能。 学习VerilogHDL的经典例子，添加了显示功能。-Complete Verilog HDL-based digital stopwatch works in the test machine is running verify pass the platform. With 8-bit 7-segment digital tube showed the delicate, seconds, minutes. Has started, pause, reset. Learning VerilogHDL classic example of adding a display.

说明：  designers guide to vhdl(third edition)这本书好像在国外vhdl入门中挺流行的, 爱思维尔有资源,但是是各个章节散装的, 我把它们合成了(The book designers guide to vhdl (third edition) seems to be very popular in foreign vhdl entry. Ixel has resources, but it is a loose chapter of each chapter, I synthesized them)

用vhdl实现ps2鼠标的源程序-achieved using VHDL source ps2 mouse

FPGA课件，个人感觉不错，希望对大家有帮助(FPGA software, personal feel good, I hope all of you help)

音乐计算器，可实现999以下加减法及与非运算功能，并能够播放两段音乐，可下载到FPGA板子上实现。(Music Calculator)

基于DE2_70平台，编写nios软核c代码，控制流水灯，硬件实现验证通过，适合入门(Based DE2_70 platform, written nios soft core c code, control water lights, verified by hardware implementation, suitable for entry)

用Verilog编写的以太网控制器，可以使用，里面是全部verilog源码(Ethernet controller based on Verilog, can be used directly, all verilog files)