在点阵平面上画线段叫做插补。高级语言都有功能提供，例如LineTo函数或者DrawLine函数等，名称不同，工作内容是一样的，即指定一个起点和一个终点，然后用插补的算法画出线段，不过它们没有代码，读者不知道怎么完成插补的。本程序给出了这个过程。对自己开发在低档单片机上的运动控制提供一个参考。同时还提供了直线方程式系数的计算代码。-Draw line segments in the lattice plane is called interpolation. Have provided high-level language features, such as DrawLine LineTo function or functions, etc., with different names, job content is the same, that is, specify a start and an end point, and then use interpolation algorithms to draw line segments, but they do not have code readers do not know how to complete interpolation. This program gives the process. Their development in the low-end microcontroller to provide a reference for motion control. It also provides a linear equation coefficient calculation code.