On Monday 21 May 2007 06:23, Itamar Amsili wrote:
> I need to allocate a new address to a new mote who joined the network,
> (or maybe change a mote's ID from 1 to 2).
> I want to do the allocation inside the program (dymanic), and i think i
> need to use the ActiveMessageAddressC component.
> Do i need to use the ActiveMessageAddressC ? and how to use it?
> Can one shows me that?
> And if not using the ActiveMessageAddressC, what other options do i have?
I'm using ActiveMessageAddressC and it mostly works. The CC2420 radio knows
about the node address but doesn't get notified on changes via
setAmAddress(), so the code snippets below deal with that issue. I suspect
the notification issue may affect other radios, but haven't investigated
them.
wiring:
components YourModule, ActiveMessageAddressC;
YourModule.amAddress -> ActiveMessageAddressC;
components CC2420ControlC;
YourModule.CC2420Config -> CC2420ControlC;
In a module:
/* to get am_addr_t if not already included */
#include "/opt/tinyos-2.x/tos/types/message.h"
uses interface CC2420Config;
uses sync command void setAmAddress(am_addr_t a);
then in the implementation somewhere:
someFunction(am_addr_t addr)
{
atomic {
call setAmAddress(addr);
TOS_NODE_ID = addr;
}
call CC2420Config.setShortAddr(addr);
call CC2420Config.sync();
}
event void CC2420Config.syncDone(error_t err)
{
/* The radio has completed the change */
}
PS - Thanks go to David Moss, who helped me work through this solution a
couple of weeks ago, on this list.
Steve
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