基于lpc2131开发板，步进电机驱动，实现小车的循迹以及扎平衡-Lpc2131-based development board, stepper motor driver, the vehicle tracking as well as to achieve a balance bar

基于ucos ii操作系统的步进电机驱动，有效驱动步进电机正反转-Based on ucos ii operating system of stepper motor driver, driving a stepper motor and reversing. Effectively.