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- 本设计主要实现用按键控制步进电机四相单拍、四相双拍和四相八拍三种方式切换, 正、反转及其加、减速,并能在LCD上显示其运行状态(速度和转向)。-The design of the main keys to achieve control of stepper motor with a single shot four-phase, four-phase two-and four-phase eight-shot shoot three ways to switch Positive, r