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<html><head><title>Interface: ReceiveMsg</title></head><body><table BORDER="0" CELLPADDING="3" CELLSPACING="0" width="100%"><tr><td><font size="-1"><b><font color="blue"><a href="apps_p.html">Apps</a></font></b> <b><a href="components_p.html">Components</a></b> <b><a href="interfaces_p.html">Interfaces</a></b> <b><a href="allfiles_p.html">All Files</a></b> <b><a href="index.html">Source Tree</a></b> </font></td><td align="right"><font size="-1">source: <b><a href="tos.interfaces.ReceiveMsg.nc.source">tos.interfaces.ReceiveMsg.nc</a></b></font></td></tr></table><hr><h1 align="center">Interface: ReceiveMsg</h1><p> TinyOS AM packet reception interface. <table border="0" cellpadding="0"><tr valign="top"><td><b>Author:</b><td> Jason Hill </td></tr><tr valign="top"><td> </td><td> David Gay </td></tr><tr valign="top"><td> </td><td> Philip Levis </td></tr><tr valign="top"><td><b>Modified:</b><td> 6/25/02</td></tr></table><p><dl><dt>Components providing this interface:<dd> <a href="apps.last.Multihop.nc.html">apps.last.Multihop</a><br> <a href="apps.last.MultihopM.nc.html">apps.last.MultihopM</a><br> <a href="apps.last.RecvmsgPost.nc.html">apps.last.RecvmsgPost</a><br> <a href="apps.last.RecvmsgPostM.nc.html">apps.last.RecvmsgPostM</a><br> <a href="apps.newtopo.Multihop.nc.html">apps.newtopo.Multihop</a><br> <a href="apps.newtopo.MultihopM.nc.html">apps.newtopo.MultihopM</a><br> <a href="apps.newtopo.RecvmsgPost.nc.html">apps.newtopo.RecvmsgPost</a><br> <a href="apps.newtopo.RecvmsgPostM.nc.html">apps.newtopo.RecvmsgPostM</a><br> <a href="apps.topo.Multihop.nc.html">apps.topo.Multihop</a><br> <a href="apps.topo.MultihopM.nc.html">apps.topo.MultihopM</a><br> <a href="tos.lib.CC2420Radio.CC2420RadioC.nc.html">tos.lib.CC2420Radio.CC2420RadioC</a><br> <a href="tos.lib.CC2420Radio.CC2420RadioM.nc.html">tos.lib.CC2420Radio.CC2420RadioM</a><br> <a href="tos.lib.CC2420Radio.RadioCRCPacket.nc.html">tos.lib.CC2420Radio.RadioCRCPacket</a><br> <a href="tos.system.AMPromiscuous.nc.html">tos.system.AMPromiscuous</a><br> <a href="tos.system.AMStandard.nc.html">tos.system.AMStandard</a><br> <a href="tos.system.FramerAckM.nc.html">tos.system.FramerAckM</a><br> <a href="tos.system.FramerM.nc.html">tos.system.FramerM</a><br> <a href="tos.system.GenericComm.nc.html">tos.system.GenericComm</a><br> <a href="tos.system.GenericCommPromiscuous.nc.html">tos.system.GenericCommPromiscuous</a><br> <a href="tos.system.NoCRCPacket.nc.html">tos.system.NoCRCPacket</a><br> <a href="tos.system.PacketSink.nc.html">tos.system.PacketSink</a><br> <a href="tos.system.UARTComm.nc.html">tos.system.UARTComm</a><br> <a href="tos.system.UARTFramedPacket.nc.html">tos.system.UARTFramedPacket</a><br></dl><p><dl><dt>Components requiring this interface:<dd> <a href="apps.Oscilloscope.OscilloscopeM.nc.html">apps.Oscilloscope.OscilloscopeM</a><br> <a href="apps.Userfuc.M2MFuncM.nc.html">apps.Userfuc.M2MFuncM</a><br> <a href="apps.last.M2MFuncM.nc.html">apps.last.M2MFuncM</a><br> <a href="apps.last.MultihopM.nc.html">apps.last.MultihopM</a><br> <a href="apps.last.RecvmsgPostM.nc.html">apps.last.RecvmsgPostM</a><br> <a href="apps.last.Topology.nc.html">apps.last.Topology</a><br> <a href="apps.last.TopologyM.nc.html">apps.last.TopologyM</a><br> <a href="apps.newtopo.M2MFuncM.nc.html">apps.newtopo.M2MFuncM</a><br> <a href="apps.newtopo.MultihopM.nc.html">apps.newtopo.MultihopM</a><br> <a href="apps.newtopo.RecvmsgPostM.nc.html">apps.newtopo.RecvmsgPostM</a><br> <a href="apps.newtopo.TopologyM.nc.html">apps.newtopo.TopologyM</a><br> <a href="apps.topo.M2MFuncM.nc.html">apps.topo.M2MFuncM</a><br> <a href="apps.topo.Multihop.nc.html">apps.topo.Multihop</a><br> <a href="apps.topo.MultihopM.nc.html">apps.topo.MultihopM</a><br> <a href="apps.topo.Topology.nc.html">apps.topo.Topology</a><br> <a href="apps.topo.TopologyM.nc.html">apps.topo.TopologyM</a><br> <a href="tos.lib.Broadcast.Bcast.nc.html">tos.lib.Broadcast.Bcast</a><br> <a href="tos.lib.Broadcast.BcastM.nc.html">tos.lib.Broadcast.BcastM</a><br> <a href="tos.lib.Route.MultiHopEngineM.nc.html">tos.lib.Route.MultiHopEngineM</a><br> <a href="tos.lib.Route.MultiHopLEPSM.nc.html">tos.lib.Route.MultiHopLEPSM</a><br> <a href="tos.lib.Route.MultiHopRouter.nc.html">tos.lib.Route.MultiHopRouter</a><br> <a href="tos.system.AMPromiscuous.nc.html">tos.system.AMPromiscuous</a><br> <a href="tos.system.AMStandard.nc.html">tos.system.AMStandard</a><br> <a href="tos.system.FramerAckM.nc.html">tos.system.FramerAckM</a><br></dl><p><table BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><tr BGCOLOR="#CCCCFF"><td><h3>Events</h3></td></tr></table><ul><li> TOS_MsgPtr <a href="# TOS_MsgPtr receive(TOS_MsgPtr m)"><b>receive</b> </a>(TOS_MsgPtr m)<menu> A packet has been received.</menu><p></ul><table BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><tr BGCOLOR="#CCCCFF"><td><h3>Events - Details</h3></td></tr></table> <a name=" TOS_MsgPtr receive(TOS_MsgPtr m)"></a> <h4>receive</h4> TOS_MsgPtr <b>receive</b>(TOS_MsgPtr m)<P><menu> A packet has been received. The packet received is passed as a pointer parameter. The event handler should return a pointer to a packet buffer for the reception layer to use for the next reception. This allows an application to swap buffers back and forth with the messaging layer, preventing the need for copying. The signaled component should not maintain a reference to the buffer that it returns. It may return the buffer it was passed. For example: <code><pre> event TOS_MsgPtr ReceiveMsg.receive(TOS_MsgPtr m) { return m; } </pre></code> A more common example: <code><pre> TOS_MsgPtr buffer; event TOS_MsgPtr ReceiveMsg.receive(TOS_MsgPtr m) { TOS_MsgPtr tmp; tmp = buffer; buffer = m; post receiveTask(); return tmp; } </pre></code> <table border="0" cellpadding="0"><tr valign="top"><td><b>Returns:</b></td><td> A buffer for the provider to use for the next packet.</td></tr></table></menu>⌨️ 快捷键说明
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