用于L298N的交流电机驱动，本代码用于步进电机正传两相八拍的程序。-For L298N AC motor drive, the code for stepper motor True Story of two-phase eight-beat program.

用于L298N驱动控制步进电机，本代码是其中的两项四拍程序。-For L298N drive control stepper motor, the code is one of the two four-beat program.