说明：  C51单片机用于测试4相步进电机常规驱动 使用1-2相励磁 1-2相激励功率增倍，步进角度减半 ，抖动减少
(C51 single chip microcomputer is used to test the conventional drive of 4- phase stepper motor. 1-2 phase excitation 1-2 phase excitation power is doubled, step Angle is halved, and jitter is reduced)