As per the previous emails,
Set the reliability control flag, and if the message is acknowledged
by the receiver, the reliability feedback flag will be set. If you do
not set the reliability control flag, no acknowledgement will be
requested.
You cannot attach data on the acknowledgement packet, it uses the
fixed IEEE 802.15.4 standard format.
-Joe
ps: Please cc [email protected] so others can
benefit from your questions.
On 11/24/06, Ee Foong Lee <[EMAIL PROTECTED]> wrote:
Hi Joe,
Thank you. I've solved the problem. I guess my next question is how do I
enable or disable acknowledgement. My application need to be able to turn on
and off the acknowledgement control at some point. Also, how do the receiver
send an acknowledgement back to sender since I need to attach some data on
the acknowledgement packet?
Thank you.
Andre
On 11/24/06, Joe Polastre <[EMAIL PROTECTED]> wrote:
> Test the feedback flag SP_FLAG_F_RELIABLE, *not* the control flag
> SP_FLAG_C_RELIABLE. See the documentation for more information in
> /opt/moteiv/doc/nesdoc.
>
> Acks will only be used for unicast destinations (ie, 1, 2, 3...)
>
> -Joe
>
> On 11/23/06, Ee Foong Lee <[EMAIL PROTECTED]> wrote:
> >
> >
> > Hi,
> >
> > When i used sendAdv to send packets to receiver and i set the flag in
> > sendAdv to SP_FLAG_C_RELIABLE to acknowledge each packet.
> > Then, during each sendDone, i tested the flag in the sendDone to see if
it
> > equal to SP_FLAG_C_RELIABLE. But the flag depends on
> > how you specify the destination address in sendAdv. If i use some
specific
> > address (eg. 1, 2, ...), then the flag will not be set,
> > but if i use TOS_BCAST_ADDR as the destination address, then the flag is
> > set. How come?How can I send to a specific address with
> > the flag get set?
> >
> > Thank you.
> >
> > Andre
> >
> >
> > On 11/3/06, Joe Polastre < [EMAIL PROTECTED]> wrote:
> > > Using SP, you want to request reliability.
> > >
> > > See the SPSend.sendAdv() function definition in /opt/moteiv/doc/nesdoc
> > > (start by opening index.html and navigating in the left frame). An
> > > example using reliability is in /opt/moteiv/tos/lib/MultiHopLQI
> > >
> > > -Joe
> > >
> > > On 11/2/06, Lee Ee Foong < [EMAIL PROTECTED]> wrote:
> > > > I'm trying to test the ack in the sendDone( ) but the ack field
always
> > set
> > > > to zero. I call MacControl.enableACK( ) in the StdControl.start( ).
Is
> > > > there something that I did wrong or missing?
> > > >
> > > > I wired the components as following:
> > > >
> > > > Main.StdControl -> CC2420RadioC;
> > > > MultiHopEngineM.MacControl -> CC2420RadioC;
> > > >
> > > > command result_t StdControl.start()
> > > > {
> > > > call MacControl.enableAck();
> > > > return SUCCESS;
> > > > }
> > > >
> > > >
> > > > event result_t SendMsg.sendDone[uint8_t id](TOS_MsgPtr pMsg,
result_t
> > > > success)
> > > > {
> > > > dbg(DBG_TEMP, "ack is %d \n", pMsg->ack);
> > > >
> > > > if (pMsg->ack == 1)
> > > > call Leds.redToggle();
> > > > else
> > > > call Leds.greenToggle();
> > > >
> > > > return SUCCESS;
> > > > }
> > > >
> > > >
> > > >
> > > > Thank you.
> > > >
> > > > Andre
> > > >
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