Crestron CNX-BF12 Especificaciones descargar pdf (Pagina 84)

EssentialsofCrestronProgramming



84

AppleTVs



TheVirtualPresentationRoomfeatures2AppleTVservers.Thissectionwilldiscuss

howtouseBuffersymbolsfordevicesthatuseasharedsetofbuttons.Thetouchpanel

projectprovidesonesubpagethatcontainsthetransportcontrolsforanAppleTV

device.ThissubpagecanbecalledupbyeitherofthetwoAp

pleTVsourcesinthe

SIMPLprogram.TheBuffersymbolallowstheprogramtodeterminewhichAppleTV

sourcethetransportbuttonswillcontrol.



TheBuffersymbolcanbethoughtofasagatethatcanbeopenedorclosed,thus

controllingtheflowofda

ta.Whenthegateisopen,digitalsignalsareallowedtoflow

unalteredfromtheinputstothecorrespondingoutputs.Whenthegateisclosed,all

outputsignalsaresettologiclowandtheinputsignalshavenoeffectonthem.

Openingandclosingthegateishandledbythe<enable>input.Whenth

esignal

connectedtothisinputishigh,theBufferisenabled(thegateisopen),andwhenthis

signalislow,thesymbolisdisabled(thegateisclosed).



ThesourceselectbuttonpressforAppleTV1willbeconnectedtothe<enable>inputof

oneBuffersymbol,whilethebuttonpressforAp

pleTV2willbeconnectedtothe

<enable>inputofasecondBuffersymbol.WhenagivenBufferisenabledthetransport

controlsignalswillflowuninterruptedtothecorrespondingIRport.



NotefromtheexamplethatonlyoneBuffershouldbeenabledatanygiventime.Iftwo

Bufferswereenabledatonce,pressingthePLAYbuttonwouldcausemultiple

commandstobeissued,whichisnotwhatwewant.Therefore,theSIMPLprogram

1 2 ... 79 80 81 82 83 84 85 86 87 88 89 ... 99 100

Sin comentarios

Crestron CNX-BF12 Especificaciones Pagina 84