利用if语句实现流水灯设计。工具：Quartus ii 6.0 语言：VHDL-If statement using lights to achieve the design flow. Tools: Quartus ii 6.0 Language: VHDL

VHDL编写的4个led灯循环明暗变化，通过改变波形占空比实现，课堂作业自编程序-VHDL prepared by the four led lights cycle shading changes, by changing the waveform duty cycle to achieve, self-compiled class operating procedures

基于NIOSII的led驱动程序，包含FPGA的硬件设计部分和软件设计部分-Based NIOSII' s led driver, the hardware design part contains the FPGA and software design