悬挂控制系统（电设题），使用飞思卡尔mc9s12DG128单片机作为主控芯片，控制两个步进电机让悬挂的画笔在倾斜的平板上画出预设的图形-Suspension control system (electric facilities title), using Freescale mc9s12DG128 microcontroller as the master chip to control two stepper motors to hang in the tilt of the tablet