event void SendTimer.fired(){if(sends){call Leds.led2On();call AMSender.send(AM_BROADCAST_ADDR, &packet, 2 * sizeof(uint8_t));        }}

  command error_t AMSend.send(am_addr_t dest,message_t* msg,uint8_t len) {// printf("AMSend.send!!!\r\n");call AMPacket.setDestination(msg, dest);        //设置packet的目的地址call AMPacket.setType(msg, amId);              //设置packet的类型return call Send.send(msg, len);            　//发送packet}

/*** Accepts a properly formatted AM packet for later sending.* Assumes that someone has filled in the AM packet fields* (destination, AM type).** @param msg - the message to send* @param len - the length of the payload**/command error_t Send.send[uint8_t clientId](message_t* msg,uint8_t len) {//printf("Send.send !!!  numClients=%d clientId=%d\r\n",numClients,clientId);if (clientId >= numClients) {            //numClients=1,    clientId=0,具体什么意义暂时不了解return FAIL;}if (queue[clientId].msg != NULL) {return EBUSY;}dbg("AMQueue", "AMQueue: request to send from %hhu (%p): passed checks\n", clientId, msg);//printf("msg=%s !!!\r\n",msg);queue[clientId].msg = msg;call Packet.setPayloadLength(msg, len);        //在头部加入CC2420_SIZE的大小的头if (current >= numClients) { // queue empty　    　//current=1
        error_t err;am_id_t amId = call AMPacket.type(msg);        //amId=240  new AMSenderC(240)am_addr_t dest = call AMPacket.destination(msg);    //dest=-1,广播目的节点为-1?// printf("current=%d amId=%d,dest=%d!!!\r\n",current,amId,dest);dbg("AMQueue", "%s: request to send from %hhu (%p): queue empty\n", __FUNCTION__, clientId, msg);current = clientId;//printf("AMQueueImplP\r\n");err = call AMSend.send[amId](dest, msg, len);if (err != SUCCESS) {//printf("underlying send failed\r\n");dbg("AMQueue", "%s: underlying send failed.\n", __FUNCTION__);current = numClients;queue[clientId].msg = NULL;}//printf("SUCCESS\r\n");return err;}else {dbg("AMQueue", "AMQueue: request to send from %hhu (%p): queue not empty\n", clientId, msg);}return SUCCESS;}

/***************** 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 );if (len > call Packet.maxPayloadLength()) {return ESIZE;}header->type = id;                //header->type就是new AMSenderC(240)这里的240header->dest = addr;            //header->dest=-1,由于是广播        header->destpan = call CC2420Config.getPanAddr();    //header->destpanheader->src = call AMPacket.address();    //header->src  packet源地址//   printf("header->type=%d,header->dest=%d,header->destpan=%d,header->src=%d,\r\n",
//                                header->type,header->dest,header->destpan,header->src);//printf("CC2420ActiveMessageP\r\n");if (call RadioResource.immediateRequest() == SUCCESS) {    //立即请求radio资源，经调试，一般都会成功
      error_t rc;signal SendNotifier.aboutToSend[id](addr, msg);        //为什么AMQueueImplP没有实现该事件。//printf("CC2420ActiveMessageP\r\n");rc = call SubSend.send( msg, len );if (rc != SUCCESS) {call RadioResource.release();}return rc;} else {pending_length  = len;pending_message = msg;return call RadioResource.request();}}

command error_t ActiveSend.send(message_t* msg, uint8_t len) {//printf("CC2420TinyosNetworkP\r\n");
    call CC2420Packet.setNetwork(msg, TINYOS_6LOWPAN_NETWORK_ID);m_busy_client = CLIENT_AM;return call SubSend.send(msg, len);}

  /***************** Send Commands ****************//*** Each call to this send command gives the message a single* DSN that does not change for every copy of the message* sent out.  For messages that are not acknowledged, such as* a broadcast address message, the receiving end does not* signal receive() more than once for that message.*/command error_t Send.send(message_t *msg, uint8_t len) {error_t error;//printf("UniqueSendP Send.send\r\n");if(call State.requestState(S_SENDING) == SUCCESS) {(call CC2420PacketBody.getHeader(msg))->dsn = localSendId++;if((error = call SubSend.send(msg, len)) != SUCCESS) {call State.toIdle();}return error;}return EBUSY;}

command error_t Send.send(message_t * msg, uint8_t len){printf("AsyncSendAdapterP Send.send\r\n");return call AsyncSend.send(msg, len);}

async command error_t Send.send(message_t * msg, uint8_t len){//printf("XmacSenderP Send.send\r\n");if(call SendState.getState() == S_STOPPED)return EOFF;// Make sure that the radio isn't off// Try to move to the preamble state            if(call SendState.requestState(S_PREAMBLE) == SUCCESS){call FixedSleepLplListener.cancelTimeout();atomic{msg_ = msg;len_ = len;}post doStart();return SUCCESS;// Save the parameters and start the radio
        }return FAIL;}