设计一个基于FPGA的四相步进电机定位控制系统。步进电机是利用数字信号控制的电机装置，步进电机每次接受到一组脉冲数字信号，便旋转一个角度，称为步进角。不同规格的步进电机的步进角不同，与电机内部的线圈数量有关。线圈中的供应电流决定线圈所产生的磁场方向-FPGA-based design of a four-phase stepper motor positioning control system. Stepper motor control using digital signal of the electrical device, stepper motor pulse each time a group of received digital signal, then a point of rotation, known as the stepping angle. Different specifications of the stepper motor step angle is different from the internal coil and the number of motor-related. Coil in the supply of current decisions of the magnetic field generated by coil direction