实现图形化步进电机的系统控制操作，通过UI界面控制图形，例如三角形，矩形和正弦。图形代表步进电机的速度方向。主要实现通过图形控制角度和速度来实现步进电机控制系统。-Stepper motor to achieve a graphical operating system control through a graphical UI interface control, such as triangles, rectangles and sinusoidal. Graphical representation of the stepper motor speed direction. Mainly achieved through the graphical control angle and speed stepper motor control system.