实现与PIC18单片机的USART的LIN主节点驱动程序

Likemostnetworkprotocols,theLocalInterconnect

Network(LIN)asdescribedintheofficialspecification

isamulti-layeredsystem.Thelevelsvaryfromthe

physicalinterfaceuptothehighlevelapplication,with

logicaldataconnectionsbetweennodesatvariouslay-

ers.Thisapplicationnotefocusesontheimplementa-

tionofaninterfacebetweenthephysicalinterfaceand

higherlevelapplicationfirmware,essentiallyahard-

waredriver(theshadedblocksinFigure1).Specifi-

cally,thisdocumentpresentsaMasternodedriverthat

isdesignedforPIC18microcontrollerswithastandard

USARTmodule.AN235ImplementingaLINMasterNodeDriveronaPIC18MicrocontrollerwithUSARTAuthor:RossM.FoslerUsersinterestedintheimplementationofLINSlavenodes(notdiscussedinthisdocument)areMicrochipTechnologyInc.encouragedtovisittheMicrochipwebsite(www.microchip.com)foradditionalapplicationnotesINTRODUCTIONandotherinformation.Likemostnetworkprotocols