此程序是基于ARM9的，是通过压力传感器控制步定电机的转速，经测试成功的-This program is arm9-based, is through the pressure sensor control step motor speed, the test of success

TI开发板AM3517控制步进电机的程序，如果从51单片机过渡到高级MCU感觉无从下手的可以参考下-TI AM3517 board stepper motor control procedures, if the transition 51 to advanced microcontroller MCU can not start feeling under reference

步进电机驱动，应用直线型加减速进行速度控制，适用简单的云台运动，低速运动等场景。(The step motor is driven by a linear acceleration and deceleration speed control, which is suitable for simple motion of cloud platform, low speed motion and so on.)