platform support for the IRIS mote (atm1218 MCU and rf230 radio)

[tinyos-2.x.git] / tos / chips / rf230 / UniqueLayerP.nc

diff --git a/tos/chips/rf230/UniqueLayerP.nc b/tos/chips/rf230/UniqueLayerP.nc
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+++ b/tos/chips/rf230/UniqueLayerP.nc
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+/*
+ * Copyright (c) 2007, Vanderbilt University
+ * All rights reserved.
+ *
+ * Permission to use, copy, modify, and distribute this software and its
+ * documentation for any purpose, without fee, and without written agreement is
+ * hereby granted, provided that the above copyright notice, the following
+ * two paragraphs and the author appear in all copies of this software.
+ * 
+ * IN NO EVENT SHALL THE VANDERBILT UNIVERSITY BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
+ * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE VANDERBILT
+ * UNIVERSITY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ * THE VANDERBILT UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE VANDERBILT UNIVERSITY HAS NO OBLIGATION TO
+ * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+ *
+ * Author: Miklos Maroti
+ */
+
+#include <Tasklet.h>
+#include <Neighborhood.h>
+
+module UniqueLayerP
+{
+       provides
+       {
+               interface Send;
+               interface RadioReceive;
+
+               interface Init;
+       }
+
+       uses
+       {
+               interface Send as SubSend;
+               interface RadioReceive as SubReceive;
+
+               interface UniqueConfig;
+               interface Neighborhood;
+               interface NeighborhoodFlag;
+       }
+}
+
+implementation
+{
+       uint8_t sequenceNumber;
+
+       command error_t Init.init()
+       {
+               sequenceNumber = TOS_NODE_ID << 4;
+               return SUCCESS;
+       }
+
+       command error_t Send.send(message_t* msg, uint8_t len)
+       {
+               call UniqueConfig.setSequenceNumber(msg, ++sequenceNumber);
+               return call SubSend.send(msg, len);
+       }
+
+       command error_t Send.cancel(message_t* msg)
+       {
+               return call SubSend.cancel(msg);
+       }
+
+       event void SubSend.sendDone(message_t* msg, error_t error)
+       {
+               signal Send.sendDone(msg, error);
+       }
+
+       command uint8_t Send.maxPayloadLength()
+       {
+               return call SubSend.maxPayloadLength();
+       }
+
+       command void* Send.getPayload(message_t* msg, uint8_t len)
+       {
+               return call SubSend.getPayload(msg, len);
+       }
+
+       tasklet_async event bool SubReceive.header(message_t* msg)
+       {
+               // we could scan here, but better be lazy
+               return signal RadioReceive.header(msg);
+       }
+
+       tasklet_norace uint8_t receivedNumbers[NEIGHBORHOOD_SIZE];
+
+       tasklet_async event message_t* SubReceive.receive(message_t* msg)
+       {
+               uint8_t index = call Neighborhood.insertNode(call UniqueConfig.getSender(msg));
+               uint8_t dsn = call UniqueConfig.getSequenceNumber(msg);
+
+               if( call NeighborhoodFlag.get(index) )
+               {
+                       uint8_t diff = dsn - receivedNumbers[index];
+
+                       if( diff == 0 )
+                       {
+                               call UniqueConfig.reportChannelError();
+                               return msg;
+                       }
+               }
+               else
+                       call NeighborhoodFlag.set(index);
+
+               receivedNumbers[index] = dsn;
+
+               return signal RadioReceive.receive(msg);
+       }
+
+       tasklet_async event void Neighborhood.evicted(uint8_t index) { }
+}