用Verilog语言编写的FPGA控制PWM的程序.利用码盘脉冲进行调速,进行过简单试验,可用.没有经过长期验证.做简单修改即可应用!-Using Verilog languages FPGA control PWM procedures. Using pulse code disk for governor, conducted a simple test that can be used. Not after a long-term verification. To do a simple