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.

通过C51单片机对DS1302芯片进行控制来实现年月日，时分秒的设计，次设计充分利用51单片机的扩展功能，简单方便的实现日历时钟的控制-This program through the C51 to DS1302 chips for control to realize the date, when the design of the arc, time to make full use of 51 SCM design of the function expansion, simple to

数控插补程序，直线插补和圆弧插补，1．直线插补：逐点比较法插补；2． 圆弧插补：DDA法插补第一、二象限的逆圆弧-NC interpolation procedures, linear interpolation and circular interpolation, 1. Linear interpolation: by-point comparison interpolation 2. Circular interpolation: DDA interpolation method fir

ARC EM4 timer example project