Design And Implementation Of DeviceNet Specification Based On μC/OS-Ⅱ

Fieldbus is a interconnected communications network for field intelligent apparatus in automation,manufacture automation,building automation and so on.It was first developed at the end of eighty's. As the base of digital communications network,it communicates the course of production among control appliance in field and higher control management level.It is not just a base control network,but a open,new type full distributed control system.The composite technology main for intelligent sensor,control,computer and digital communication has been paid close attention by the world and become hot spot of automation development.Fieldbus is a open communication network,and is also a full distributed control system.As the tache of intelligent apparatus,it connects intelligent apparaus as network system,and then composes automention system,to implement base control,compensate calculate,parameter alter,alarm,display,monitor,optimize and control-management all-in-one. This is a composite technology including embedded,control,computer,digital and network.This paper introduces the fieldbus's concept,feature and some of fieldbuses first, and expounds the content and significance of this paper;Then introduces some technology used in paper including DeviceNet specification,μC/OS-Ⅱsystem and ARM;The next introduces overall design of the paper,we design main module and slaver module bases on different functions,and give out software system structural diagram;And then introduces implemention of the design,first we plantμC/OS-Ⅱsystem on ARM7,then design main and slaver software;At the last of this paper specifies running programme tracement diagram to test the result of the DeviceNet specification implemention.