That depends if you have ACKs enabled.
W/o ACKs, sendDone() is called sometime after the last byte of the message
has been written into the transmitter input register.
W/ ACKs, sendDone() is delayed for a short period (rummage in the radio code
to see how long, but order of mag is 10ms). If an ACK is received the wait
breaks and the msg->ack field is set, otherwise not.
In either case it's a tossup as to synchronicity with a receiver at the
user level.
This is, of course, real-world talk, if it's a SIM run I have no idea...
MS
Thang Le wrote:
From my understanding, in TinyOS 1.1.15, SendDone is invoked when the
package is successfully queued at the sender. Even without any receiver,
SendDone is still called.
*/Bibudh Lahiri <[EMAIL PROTECTED]>/* wrote:
Faisal,
I'm not sure, but my guess is sendDone() is invoked at the src
when the MAC-layer ACK is received by the sender. The MAC layer ACK
is always rcvd from the one-hop neighbor, because MAC is not
concerned about end-to-end message delivery. So in case of multi-hop
routing, it appears to u that sendDone() is called before the frame
is received at destination.
Bibudh
On 4/1/07, *Faisal Karim* <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> wrote:
Hi All
Im using TinyOS 1.1.15, can anybody tell me why this behavior is
encountered for sendDone()
When the source is in one hop from destination the packet is
received by destination first than sendDone is called at source.
But in case when source is more than one hop away sendDone is
called before it is received at destination, which is correct
operation. Can someone put light on this.
Regards
Shaikh, Faisal Karim
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