First of all, thank you for the quick answer!
However, the main problem expressed in my previous message, is how can i get
the am_addr_t of a received message!
I should use the AMPacket interface? Can I use the AMPacket and the Packet
interface at the same time?
Again, thank you for your time,
Artemis Voulkidis
National Technical University of Athens
On Sun, Oct 12, 2008 at 7:48 PM, tarun sharma <[EMAIL PROTECTED]> wrote:
> I understand that you want to unicast message form a node. I have
> implemented this in two ways in my projects based on the requirement:
>
> 1) if the sender knows the node to which it wants to send the message
> and receiver doesn't know from which node it wants to receive:
>
> sender uses the target nodes ID to send the message:
> call AMSend.send("the address", msg, len)
>
> receiver on receiving check if message is intended for itself:
> call AMPacket.isForMe(msg)
>
> if it is, message is accepted
>
>
>
> 2) if sender doesn't know which node it wanted to send the message to
> but receiver knows from which node it wants to receive:
>
> sender broadcasts the message:
> call AMSend.send(AM_BROADCAST_ADDR, &pkt, len)
>
>
> receiver on receiving the messages check if the sender of this message
> was the one from which it is expecting a message:
>
> if(call AMPacket.source(msg)=="the address")
>
> if it is message is accepted
>
>
>
> On Sun, Oct 12, 2008 at 6:23 PM, Artemis Voulkidis <[EMAIL PROTECTED]>
> wrote:
> > Hello!
> >
> > I am trying to make a node send a data packet to another node, but i
> cannot
> > figure out how i can achieve this..
> >
> > For example, I have created a struct:
> >
> > typedef nx_struct msg_send_temp {
> > uint8_t msg_type;
> > uint8_t temp
> > } msg_send_temp_t;
> >
> > I try to send it with the help of Packet, and AMSend interfaces like
> this:
> >
> > void msg_send_temp(am_addr_t XXXXX) {
> > msg_send_temp_t* pkt = (msg_send_temp_t*)call
> Packet.getPayload(&packet,
> > sizeof(msg_send_temp_t));
> > if(pkt == NULL){
> > return;
> > }
> > pkt->msg_type = (uint8_t)SEND_TEMP_MSG;
> > pkt->temp = node_temp;
> > call AMSend.send(XXXXX, &packet, sizeof(msg_send_temp_t));
> > dbg("NodeC","Temp information sent, node id = %hu.\n", node_id);
> > return;
> > }
> >
> > The XXXXX written above, is supposed to be an am_addr_t of the other
> node,
> > whose am_addr_t needs to be taken from a Receive function like this:
> >
> > event message_t * Receive.receive(message_t * msg, void * payload,
> uint8_t
> > len){
> > if(len == sizeof(msg_request_temp_t)){
> > msg_request_temp_t* pkt = (msg_request_temp_t*)payload;
> > if (pkt->msg_type == REQUEST_IS_HEAD_MSG){
> > msg_send_temp(XXXXX); //Here i should try to get the msg's
> am_addr_t..
> > }
> > return msg;
> > }
> >
> >
> > However, i cannot figure out how to take the address of the source node,
> to
> > correctly pass it to the msg_send_temp(am_addr_t) function..
> >
> > Can i use simultaneously both the AMPacket and the Packet interface?
> >
> > Thank you in advance for your time,
> >
> > Artemis Voulkidis
> >
> > National Technical University of Athens
> >
> > _______________________________________________
> > Tinyos-help mailing list
> > Tinyos-help@millennium.berkeley.edu
> > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
> >
>
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