1、本程序用于测试4相步进电机常规驱动 2、需要用跳帽或者杜邦线把信号输出端和对应的步进电机信号输入端连接起来 3、速度不可以调节的过快，不然就没有力矩转动了-1, the procedures for testing of conventional 4-phase stepper motor driver 2, need to jump or DuPont line to cap the output signal and the corresponding stepper m