On Feb 3, 2008, at 3:13 PM, DAE HEE KIM wrote:
Hi.
PacketAcknowledgements worked very well in Tossim. However, in
motes. it doesn't work.
Do I have to change some other parameter in order to use
PacketAcknowledgement in motes ?
Following is my snippet that I added PacketAcknowledgements in
BlinkToRadio..
/***************************
* Send Packet
**************************/
// send data when timer expires
event void Timer0.fired()
{
counter++;
if (!busy) {
// create new packet
BlinkToRadioMsg *btrpkt = (BlinkToRadioMsg*)(call
Packet.getPayload(&pkt, NULL));
// insert data into packet
btrpkt->nodeid = TOS_NODE_ID;
btrpkt->counter = counter;
// send packet (broadcast)
call Acks.requestAck(&pkt);
if (call AMSend.send(AM_BROADCAST_ADDR, &pkt, sizeof
(BlinkToRadioMsg)) == SUCCESS) {
dbg("BlinkToRadioC","Send %d packet\n", counter);
busy = TRUE;
// send success : Blink
call Leds.led0Toggle();
}
}
}
// finish sending
event void AMSend.sendDone(message_t *msg, error_t error) {
if (&pkt == msg) {
if (call Acks.wasAcked(msg)) {
call Leds.led2Toggle();
}
else {
call Leds.led1Toggle(); <-- led1 toggles which means not
acked.
}
busy = FALSE;
}
}
Thanks in advance
You need to call PacketAcknowledgements to enable acks in the send
path. TOSSIM might have them enabled by default.
Phil
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