New demo app demonstrating how to sample rssi readings from the network

[tinyos-2.x.git] / apps / tutorials / RssiDemo / RssiBase / RssiBaseC.nc

diff --git a/apps/tutorials/RssiDemo/RssiBase/RssiBaseC.nc b/apps/tutorials/RssiDemo/RssiBase/RssiBaseC.nc
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+/*
+ * Copyright (c) 2008 Dimas Abreu Dutra
+ * All rights reserved
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the
+ *   distribution.
+ * - Neither the name of the Stanford University nor the names of
+ *   its contributors may be used to endorse or promote products derived
+ *   from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL DIMAS ABREU
+ * DUTRA OR HIS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/**
+ * @author Dimas Abreu Dutra
+ */
+
+#include "ApplicationDefinitions.h"
+#include "RssiDemoMessages.h"  
+
+module RssiBaseC {
+  uses interface Intercept as RssiMsgIntercept;
+
+#ifdef __CC2420_H__
+  uses interface CC2420Packet;
+#endif //__CC2420_H__  
+} implementation {
+
+  uint16_t getRssi(message_t *msg);
+  
+  event bool RssiMsgIntercept.forward(message_t *msg,
+                                     void *payload,
+                                     uint8_t len) {
+    RssiMsg *rssiMsg = (RssiMsg*) payload;
+    rssiMsg->rssi = getRssi(msg);
+    
+    return TRUE;
+  }
+
+#ifdef __CC2420_H__  
+  uint16_t getRssi(message_t *msg){
+    return (uint16_t) call CC2420Packet.getRssi(msg);
+  }
+#elif defined(CC1K_RADIO_MSG_H)
+    uint16_t getRssi(message_t *msg){
+    cc1000_metadata_t *md =(cc1000_metadata_t*) msg->metadata;
+    return md->strength_or_preamble;
+  }
+#else
+  #error Radio chip not supported! This demo currently works only \
+         for motes with CC1000 or CC2420 radios.  
+#endif //__CC2420_H__
+  
+}
+