内容：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接线方法：电机输入P9 A B C D 分别接到了P10 P11 P12 P13 电机接到P10 红色线在VCC位置上P9 中的JD是继电器信号输入，空，不用接，做继电器实验时可以接上。-Contents: 1, the program used to test 4 phase stepping motor conventional drive 2, need to use jump cap or dupont line the signal output end and the corresponding stepping motor signal input end connection up 3, speed can not adjust the too fast, otherwise there is no moment turned the connection methods: motor input P9 A B C D were received P10 P11 P12 P13 motor received P10 red line in the VCC position on the P9 JD is relay signal input, empty, need not meet, do relay experiment can be grafted in.