On Thu, Jan 10, 2013 at 10:49 PM, Sean Dekker <[email protected]> wrote:
> Hi all,
>
> I can successfuly receive radio packets on TelosB platform. However, all
> the nodes that I am working with do receive the packet from BaseStation
> mote. How can I check if a packet is intended to come into a specific mote?
>
The way this is supposed to work is via addressing.
AM packets have 16 bit source and destination fields. It sounds like they
aren't being used properly and doing address discrimination.
Rather than putting together a work around, figuring out why the address
discrimination doesn't work properly might be a reasonable approach.
Just a thought.
>
> For example I have the follwoing code in header of my application:
>
> enum
> {
> //Active Message Type
> AM_TYPE = 8,
> //Active Message Group
> AM_GROUP = 22
> };
>
> And in my app I have this code to receive packets:
>
> event message_t * RadioReceive.receive(message_t *msg, void *payload,
> uint8_t len)
> {
>
> if(len == lenComMsg)
> {
> MyPacket_t* inc = (MyPacket_t*) payload;
>
> switch(inc->Command)
> {
> case 's':
> StartSci();
> return msg;
>
> default:
> //Do nothing!
> break;
> }
>
> }
> }
>
> So my question is how can I check if the incoming packet has AM GROUP set
> to 22 and AM TYPE set to 8?
>
> This is the code from my configuration file:
>
> components ActiveMessageC;
> components new AMSenderC(AM_TYPE);
> components new AMReceiverC(AM_TYPE);
>
> App.RadioPacket -> AMSenderC;
> App.RadioSend -> AMSenderC;
> App.RadioControl -> ActiveMessageC;
> App.RadioReceive -> AMReceiverC;
>
> So shoud I change the AM_TYPE each time I am going to program a mote, or I
> can just check for it in receive event in my code?
>
> Regards,
> Sean.
>
>
>
>
> _______________________________________________
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> [email protected]
> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
>
--
Eric B. Decker
Senior (over 50 :-) Researcher
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