基于FPGA系统的步进电机控制，内涵详细的源代码-FPGA-based system of stepper motor control, detailed content of the source code! !

本设计是基于FPGA控制的PWM信号输出系统，以EP3C5E144C8芯片为核心，通过参考信号和输入信号在计数器中的比较来实现占空比、频率可调的脉冲宽度调制信号-The design is FPGA-based control of the PWM signal output system, to EP3C5E144C8 chip as the core, to achieve adjustable duty cycle, freque