[Tinyos-devel] CC2420 Software-ACK on Broadcast Packets

[kumar ashok]

Hardware Ack will be send for the broadcast packet too provided ack required
bit is set in the broadcast packet.

I have also experience the same when i am using the hardware ack.

if you find any mistakes, please correct me.

Thanks and Regards,
Ashok Kumar P


On 6/26/07, Philip Levis <pal at cs.stanford.edu> wrote:
>
> On Jun 26, 2007, at 12:44 AM, Chieh-Jan (Mike) Liang wrote:
>
> > I noticed that while CC2420 hardware ACK can acknowledge broadcast
> > packets, T2 software ACK can't. In addition, I see that
> > CC2420ReceiveP.nc only makes sure header->dest is the same as the
> > mote ID. Is there any reason behind this difference in behavior?
>
> The hardware ack should not acknowledge broadcast packets.
>
> It makes sure header->dest is the same as the mote ID as well as the
> header bits are right and the packet passes CRC. If you SACK strobe a
> packet that does not pass CRC then the radio does not ACK it.
>
> Phil
>
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-- 
Thanks and Regards
Ashok Kumar P
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