关于VHDL和Verilog程序的一款实用仿真软件MODELSIM的入门实用教程-About VHDL and Verilog simulation software program of a practical introductory practical tutorial MODELSIM

使用Xilinx的FPGA开发教程，Xilinx平台主要支持VHDL和Verilog的编程和实现。-Using Xilinx FPGA development tutorial, Xilinx platform is mainly supported by the programming and implementation of VHDL and Verilog.

vhdl code of debounce for fpga . you can open it with xilinx and test it with isim or modelsim, it s a good tutorial for writing your first vhdl code and test bench .