X-Git-Url: https://oss.titaniummirror.com/gitweb/?a=blobdiff_plain;f=tos%2Fchips%2Fcc2420%2FCC2420ActiveMessageP.nc;h=f3d5de3987dca244cca393046eae84d606713874;hb=e9bfab607e051bae6afb47b44892ce37541d1b44;hp=a4b86251ed615323a69160fd55e38f2b1fc2144a;hpb=d51dc49cd705145ea6ae56e4575965f35757c6c3;p=tinyos-2.x.git

diff --git a/tos/chips/cc2420/CC2420ActiveMessageP.nc b/tos/chips/cc2420/CC2420ActiveMessageP.nc
index a4b86251..f3d5de39 100644
--- a/tos/chips/cc2420/CC2420ActiveMessageP.nc
+++ b/tos/chips/cc2420/CC2420ActiveMessageP.nc
@@ -1,4 +1,4 @@
-/*									tab:4
+/*
  * "Copyright (c) 2005 Stanford University. All rights reserved.
  *
  * Permission to use, copy, modify, and distribute this software and
@@ -34,37 +34,76 @@
  
 #include "CC2420.h"
 
-module CC2420ActiveMessageP {
+module CC2420ActiveMessageP @safe() {
   provides {
     interface AMSend[am_id_t id];
     interface Receive[am_id_t id];
     interface Receive as Snoop[am_id_t id];
     interface AMPacket;
     interface Packet;
+    interface SendNotifier[am_id_t id];
+    interface RadioBackoff[am_id_t id];
   }
+  
   uses {
     interface Send as SubSend;
     interface Receive as SubReceive;
     interface CC2420Packet;
-    command am_addr_t amAddress();
+    interface CC2420PacketBody;
+    interface CC2420Config;
+    interface ActiveMessageAddress;
+    interface RadioBackoff as SubBackoff;
+
+    interface Resource as RadioResource;
+    interface Leds;
   }
 }
 implementation {
+  uint16_t pending_length;
+  message_t *pending_message = NULL;
+  /***************** Resource event  ****************/
+  event void RadioResource.granted() {
+    uint8_t rc;
+    cc2420_header_t* header = call CC2420PacketBody.getHeader( pending_message );
 
-  enum {
-    CC2420_SIZE = MAC_HEADER_SIZE + MAC_FOOTER_SIZE,
-  };
-  
-  
+    signal SendNotifier.aboutToSend[header->type](header->dest, pending_message);
+    rc = call SubSend.send( pending_message, pending_length );
+    if (rc != SUCCESS) {
+      call RadioResource.release();
+      signal AMSend.sendDone[header->type]( pending_message, rc );
+    }
+  }
+
+  /***************** AMSend Commands ****************/
   command error_t AMSend.send[am_id_t id](am_addr_t addr,
 					  message_t* msg,
 					  uint8_t len) {
-    cc2420_header_t* header = call CC2420Packet.getHeader( msg );
+    cc2420_header_t* header = call CC2420PacketBody.getHeader( msg );
+    
+    if (len > call Packet.maxPayloadLength()) {
+      return ESIZE;
+    }
+    
     header->type = id;
     header->dest = addr;
-    header->destpan = TOS_AM_GROUP;
+    header->destpan = call CC2420Config.getPanAddr();
+    header->src = call AMPacket.address();
+    
+    if (call RadioResource.immediateRequest() == SUCCESS) {
+      error_t rc;
+      signal SendNotifier.aboutToSend[id](addr, msg);
+      
+      rc = call SubSend.send( msg, len );
+      if (rc != SUCCESS) {
+        call RadioResource.release();
+      }
 
-    return call SubSend.send( msg, len + CC2420_SIZE );
+      return rc;
+    } else {
+      pending_length  = len;
+      pending_message = msg;
+      return call RadioResource.request();
+    }
   }
 
   command error_t AMSend.cancel[am_id_t id](message_t* msg) {
@@ -75,62 +114,32 @@ implementation {
     return call Packet.maxPayloadLength();
   }
 
-  command void* AMSend.getPayload[am_id_t id](message_t* m) {
-    return call Packet.getPayload(m, NULL);
-  }
-
-  command void* Receive.getPayload[am_id_t id](message_t* m, uint8_t* len) {
+  command void* AMSend.getPayload[am_id_t id](message_t* m, uint8_t len) {
     return call Packet.getPayload(m, len);
   }
 
-  command uint8_t Receive.payloadLength[am_id_t id](message_t* m) {
-    return call Packet.payloadLength(m);
-  }
-  
-  command void* Snoop.getPayload[am_id_t id](message_t* m, uint8_t* len) {
-    return call Packet.getPayload(m, len);
-  }
-
-  command uint8_t Snoop.payloadLength[am_id_t id](message_t* m) {
-    return call Packet.payloadLength(m);
-  }
-  
-  event void SubSend.sendDone(message_t* msg, error_t result) {
-    signal AMSend.sendDone[call AMPacket.type(msg)](msg, result);
-  }
-
-  /* Receiving a packet */
-
-  event message_t* SubReceive.receive(message_t* msg, void* payload, uint8_t len) {
-    if (call AMPacket.isForMe(msg)) {
-      return signal Receive.receive[call AMPacket.type(msg)](msg, payload, len - CC2420_SIZE);
-    }
-    else {
-      return signal Snoop.receive[call AMPacket.type(msg)](msg, payload, len - CC2420_SIZE);
-    }
-  }
-  
+  /***************** AMPacket Commands ****************/
   command am_addr_t AMPacket.address() {
-    return call amAddress();
+    return call ActiveMessageAddress.amAddress();
   }
  
   command am_addr_t AMPacket.destination(message_t* amsg) {
-    cc2420_header_t* header = call CC2420Packet.getHeader(amsg);
+    cc2420_header_t* header = call CC2420PacketBody.getHeader(amsg);
     return header->dest;
   }
  
   command am_addr_t AMPacket.source(message_t* amsg) {
-    cc2420_header_t* header = call CC2420Packet.getHeader(amsg);
+    cc2420_header_t* header = call CC2420PacketBody.getHeader(amsg);
     return header->src;
   }
 
   command void AMPacket.setDestination(message_t* amsg, am_addr_t addr) {
-    cc2420_header_t* header = call CC2420Packet.getHeader(amsg);
+    cc2420_header_t* header = call CC2420PacketBody.getHeader(amsg);
     header->dest = addr;
   }
 
   command void AMPacket.setSource(message_t* amsg, am_addr_t addr) {
-    cc2420_header_t* header = call CC2420Packet.getHeader(amsg);
+    cc2420_header_t* header = call CC2420PacketBody.getHeader(amsg);
     header->src = addr;
   }
 
@@ -140,63 +149,144 @@ implementation {
   }
 
   command am_id_t AMPacket.type(message_t* amsg) {
-    cc2420_header_t* header = call CC2420Packet.getHeader(amsg);
+    cc2420_header_t* header = call CC2420PacketBody.getHeader(amsg);
     return header->type;
   }
 
   command void AMPacket.setType(message_t* amsg, am_id_t type) {
-    cc2420_header_t* header = call CC2420Packet.getHeader(amsg);
+    cc2420_header_t* header = call CC2420PacketBody.getHeader(amsg);
     header->type = type;
   }
-
-  command void AMPacket.setGroup(message_t* msg, am_group_t group) {
-    cc2420_header_t* header = call CC2420Packet.getHeader(msg);
-    header->destpan = group;
+  
+  command am_group_t AMPacket.group(message_t* amsg) {
+    return (call CC2420PacketBody.getHeader(amsg))->destpan;
   }
 
-  command am_group_t AMPacket.group(message_t* msg) {
-    cc2420_header_t* header = call CC2420Packet.getHeader(msg);
-    return header->destpan;
+  command void AMPacket.setGroup(message_t* amsg, am_group_t grp) {
+    // Overridden intentionally when we send()
+    (call CC2420PacketBody.getHeader(amsg))->destpan = grp;
   }
 
   command am_group_t AMPacket.localGroup() {
-    return TOS_AM_GROUP;
+    return call CC2420Config.getPanAddr();
   }
   
-  default event message_t* Receive.receive[am_id_t id](message_t* msg, void* payload, uint8_t len) {
-    return msg;
+
+  /***************** Packet Commands ****************/
+  command void Packet.clear(message_t* msg) {
+    memset(call CC2420PacketBody.getHeader(msg), 0x0, sizeof(cc2420_header_t));
+    memset(call CC2420PacketBody.getMetadata(msg), 0x0, sizeof(cc2420_metadata_t));
   }
   
-  default event message_t* Snoop.receive[am_id_t id](message_t* msg, void* payload, uint8_t len) {
-    return msg;
+  command uint8_t Packet.payloadLength(message_t* msg) {
+    return (call CC2420PacketBody.getHeader(msg))->length - CC2420_SIZE;
+  }
+  
+  command void Packet.setPayloadLength(message_t* msg, uint8_t len) {
+    (call CC2420PacketBody.getHeader(msg))->length  = len + CC2420_SIZE;
+  }
+  
+  command uint8_t Packet.maxPayloadLength() {
+    return call SubSend.maxPayloadLength();
+  }
+  
+  command void* Packet.getPayload(message_t* msg, uint8_t len) {
+    return call SubSend.getPayload(msg, len);
+  }
+
+  
+  /***************** SubSend Events ****************/
+  event void SubSend.sendDone(message_t* msg, error_t result) {
+    call RadioResource.release();
+    signal AMSend.sendDone[call AMPacket.type(msg)](msg, result);
+  }
+
+  
+  /***************** SubReceive Events ****************/
+  event message_t* SubReceive.receive(message_t* msg, void* payload, uint8_t len) {
+    
+    if (call AMPacket.isForMe(msg)) {
+      return signal Receive.receive[call AMPacket.type(msg)](msg, payload, len);
+    }
+    else {
+      return signal Snoop.receive[call AMPacket.type(msg)](msg, payload, len);
+    }
   }
+  
 
- default event void AMSend.sendDone[uint8_t id](message_t* msg, error_t err) {
-   return;
- }
+  /***************** ActiveMessageAddress Events ****************/
+  async event void ActiveMessageAddress.changed() {
+  }
+  
+  /***************** CC2420Config Events ****************/
+  event void CC2420Config.syncDone( error_t error ) {
+  }
+  
+  
+  /***************** RadioBackoff ***********************/
 
- 
- command void Packet.clear(message_t* msg) {}
- 
- command uint8_t Packet.payloadLength(message_t* msg) {
-   return (call CC2420Packet.getHeader(msg))->length - CC2420_SIZE;
- }
+  async event void SubBackoff.requestInitialBackoff(message_t *msg) {
+    signal RadioBackoff.requestInitialBackoff[(TCAST(cc2420_header_t* ONE,
+        (uint8_t*)msg + offsetof(message_t, data) - sizeof(cc2420_header_t)))->type](msg);
+  }
+
+  async event void SubBackoff.requestCongestionBackoff(message_t *msg) {
+    signal RadioBackoff.requestCongestionBackoff[(TCAST(cc2420_header_t* ONE,
+        (uint8_t*)msg + offsetof(message_t, data) - sizeof(cc2420_header_t)))->type](msg);
+  }
+  async event void SubBackoff.requestCca(message_t *msg) {
+    // Lower layers than this do not configure the CCA settings
+    signal RadioBackoff.requestCca[(TCAST(cc2420_header_t* ONE,
+        (uint8_t*)msg + offsetof(message_t, data) - sizeof(cc2420_header_t)))->type](msg);
+  }
 
+  async command void RadioBackoff.setInitialBackoff[am_id_t amId](uint16_t backoffTime) {
+    call SubBackoff.setInitialBackoff(backoffTime);
+  }
+  
+  /**
+   * Must be called within a requestCongestionBackoff event
+   * @param backoffTime the amount of time in some unspecified units to backoff
+   */
+  async command void RadioBackoff.setCongestionBackoff[am_id_t amId](uint16_t backoffTime) {
+    call SubBackoff.setCongestionBackoff(backoffTime);
+  }
 
- command void Packet.setPayloadLength(message_t* msg, uint8_t len) {
-   (call CC2420Packet.getHeader(msg))->length  = len + CC2420_SIZE;
- }
+      
+  /**
+   * Enable CCA for the outbound packet.  Must be called within a requestCca
+   * event
+   * @param ccaOn TRUE to enable CCA, which is the default.
+   */
+  async command void RadioBackoff.setCca[am_id_t amId](bool useCca) {
+    call SubBackoff.setCca(useCca);
+  }
+  
+  /***************** Defaults ****************/
+  default event message_t* Receive.receive[am_id_t id](message_t* msg, void* payload, uint8_t len) {
+    return msg;
+  }
+  
+  default event message_t* Snoop.receive[am_id_t id](message_t* msg, void* payload, uint8_t len) {
+    return msg;
+  }
 
- command uint8_t Packet.maxPayloadLength() {
-   return TOSH_DATA_LENGTH;
- }
- 
- command void* Packet.getPayload(message_t* msg, uint8_t* len) {
-   if (len != NULL) {
-     *len = call Packet.payloadLength(msg);
-   }
-   return msg->data;
- }
+  default event void AMSend.sendDone[uint8_t id](message_t* msg, error_t err) {
+    call RadioResource.release();
+  }
 
+  default event void SendNotifier.aboutToSend[am_id_t amId](am_addr_t addr, message_t *msg) {
+  }
+  default async event void RadioBackoff.requestInitialBackoff[am_id_t id](
+      message_t *msg) {
+  }
 
+  default async event void RadioBackoff.requestCongestionBackoff[am_id_t id](
+      message_t *msg) {
+  }
+  
+  default async event void RadioBackoff.requestCca[am_id_t id](
+      message_t *msg) {
+  }
+  
 }