Design of Motion Controller of Open-architecture NC System

This text introduces a method of the design of motion controller of Open-architecture NC system and gives the design of the hardware system and software system of the motion controller based on DSP and CPLD.In the hardware aspect,We emphatically introduce the principle of movement of TMS320F2812 and the pin functions which are basically used for controlling,the principle of movement of CPLD which works with DSP and how to realize the function;In the software aspect,his paper gives the relevant software programming as a whole to show how to use the line of correspondence interface module SCI of TMS320F2812.