通过L297、L298来控制两项步进电机的旋转，速度十档，电机旋转27圈就会回头，再转够27圈自停。可设定好档位后再开始，中途可以自由停止或是换向。-Through L297, L298 to control two stepper motor rotation and speed of ten stalls, motor rotation stop twice. Stalls can be set well after the start, or stop half-way free-for-

PWM步进电机的测试程序，C51语言入门必学的内容-PWM stepper motor test program will learn the content of C51 language entry

基于TI公司的msp430g2553单片机的PWM产生程序，可以用于驱动步进电机-Based on TI company s msp430g2553 microcontroller PWM to produce procedures, can be used for driving a stepper motor

利用PWM的方式来控制两相四线步进电机的转动、正反转、转速、在什么位置停、在多少圈后正转或者反转-Use PWM way to control two-phase four-wire stepper motor rotation, rotating, speed, stop at what position, how many laps after the forward or reverse