Verlog HDL 写得一款32路方波发生器，例子是4路可以自己加，相位可调，频率可调，占空比可调。具体参见readme.doc.此处只提供了源码包含顶层模块sgs32.v 子模块dds.v和pll设置模块altp.v及波形驱动文件-Verlog HDL write a 32 square-wave generator, for example, is able to add 4-way, phase adjustable, adjustable frequency, adjustable d

在Verilog HDL中使用任务（task）， 利用有限状态机进行时序逻辑的设计，利用SRAM设计一个LIFO(In Verilog HDL, the task (task) is used, the finite state machine is used to design the time series logic, and a LIFO is designed by SRAM)