--- /dev/null
+/*
+ * "Copyright (c) 2005 Stanford 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 STANFORD 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 STANFORD UNIVERSITY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ * STANFORD 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 STANFORD UNIVERSITY
+ * HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES,
+ * ENHANCEMENTS, OR MODIFICATIONS."
+ */
+
+
+/**
+ * Active message implementation on top of the CC2420 radio. This
+ * implementation uses the 16-bit addressing mode of 802.15.4: the
+ * only additional byte it adds is the AM id byte, as the first byte
+ * of the data payload.
+ *
+ * @author Philip Levis
+ * @version $Revision$ $Date$
+ */
+
+#include "CC2420.h"
+
+module CC2420ActiveMessageP @safe() {
+ provides {
+ interface AMSend[am_id_t id];
+ interface Receive[am_id_t id];
+ interface Receive as ReceiveDefault[am_id_t id];
+ interface Receive as Snoop[am_id_t id];
+ interface Receive as SnoopDefault[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;
+ interface CC2420PacketBody;
+ interface CC2420Config;
+ interface ActiveMessageAddress;
+ interface RadioBackoff as SubBackoff;
+ }
+}
+implementation {
+
+ /***************** 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 CC2420PacketBody.getHeader( msg );
+ header->type = id;
+ header->dest = addr;
+ header->destpan = call CC2420Config.getPanAddr();
+ header->src = call AMPacket.address();
+
+ signal SendNotifier.aboutToSend[id](addr, msg);
+
+ return call SubSend.send( msg, len );
+ }
+
+ command error_t AMSend.cancel[am_id_t id](message_t* msg) {
+ return call SubSend.cancel(msg);
+ }
+
+ command uint8_t AMSend.maxPayloadLength[am_id_t id]() {
+ return call Packet.maxPayloadLength();
+ }
+
+ command void* AMSend.getPayload[am_id_t id](message_t* m, uint8_t len) {
+ return call Packet.getPayload(m, len);
+ }
+
+ /***************** AMPacket Commands ****************/
+ command am_addr_t AMPacket.address() {
+ return call ActiveMessageAddress.amAddress();
+ }
+
+ command am_addr_t AMPacket.destination(message_t* 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 CC2420PacketBody.getHeader(amsg);
+ return header->src;
+ }
+
+ command void AMPacket.setDestination(message_t* amsg, am_addr_t addr) {
+ 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 CC2420PacketBody.getHeader(amsg);
+ header->src = addr;
+ }
+
+ command bool AMPacket.isForMe(message_t* amsg) {
+ return (call AMPacket.destination(amsg) == call AMPacket.address() ||
+ call AMPacket.destination(amsg) == AM_BROADCAST_ADDR);
+ }
+
+ command am_id_t AMPacket.type(message_t* 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 CC2420PacketBody.getHeader(amsg);
+ header->type = type;
+ }
+
+ command am_group_t AMPacket.group(message_t* amsg) {
+ return (call CC2420PacketBody.getHeader(amsg))->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 call CC2420Config.getPanAddr();
+ }
+
+
+ /***************** 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));
+ }
+
+ 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 TOSH_DATA_LENGTH;
+ }
+
+ 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) {
+ 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 CC2420PacketBody.getMetadata(msg))->crc) {
+ return msg;
+ }
+
+ 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);
+ }
+ }
+
+
+ /***************** ActiveMessageAddress Events ****************/
+ async event void ActiveMessageAddress.changed() {
+ }
+
+ /***************** CC2420Config Events ****************/
+ event void CC2420Config.syncDone( error_t error ) {
+ }
+
+
+ /***************** RadioBackoff ***********************/
+
+ 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);
+ }
+
+
+ /**
+ * 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 signal ReceiveDefault.receive[id](msg, payload, len);
+ }
+
+ default event message_t* ReceiveDefault.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 signal SnoopDefault.receive[id](msg, payload, len);
+ }
+
+ default event message_t* SnoopDefault.receive[am_id_t id](message_t* msg, void* payload, uint8_t len) {
+ return msg;
+ }
+
+ default event void AMSend.sendDone[uint8_t id](message_t* msg, error_t err) {
+ }
+
+ 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) {
+ }
+
+}
projects / tinyos-2.x.git / blobdiff