键盘输入控制步进电机运动，通过算法画弧和直线。-Keyboard input to control stepper motor movement, through the arc and the straight-line drawing algorithm.

点到点直线的程序，适用51单片机，利用两直线长度的变化来运动，是个子程序，控制的是步进电机的转动。-Point line procedures applicable 51, the use of two changes in length of the line movement is sub-program that controls the rotation of the stepper motor.