Oh, this was silly question. I forgot the requestAck(). However, it's still tricky to use this Acknowledgement mechanism since my application is using UART0. It seems the radio cannot send acknowledgement if the shared USART0 is set to UART0.
Is this right? Kirak ----- Original Message ----- From: Kirak Hong <hok...@eecs.berkeley.edu> Date: Sunday, December 21, 2008 6:23 pm Subject: Re: [Tinyos-help] Link layer acknowledgement in CTP To: Omprakash Gnawali <gnaw...@usc.edu> Cc: tinyos-help@millennium.berkeley.edu > I just found that the wasAcked() function always returns FALSE if I don't use > PacketLink layer. Actually, I thought that the wasAcked() function would work > proper unless NOACKNOWLEDGEMENT is defined. > > Do you know how to turn on the acknowledgement without PacketLink layer? I'm > using telosb mote. > > > > ----- Original Message ----- > From: Omprakash Gnawali <gnaw...@usc.edu> > Date: Sunday, December 21, 2008 5:07 pm > Subject: Re: [Tinyos-help] Link layer acknowledgement in CTP > To: Kirak Hong <hok...@eecs.berkeley.edu> > Cc: tinyos-help@millennium.berkeley.edu > > > On Sun, Dec 21, 2008 at 4:53 PM, Kirak Hong > > <hok...@eecs.berkeley.edu> wrote: > > > Hello guys, > > > > > > > > > I'm using CTP and found some redundant transmission problem. I > > think it > > > retransmits redundant packets because > > PacketAcknowledgements.wasAcked is not > > > working well. On transmitter side, wasAcked() in > > > CtpForwardingEngineP.nc:SubSend.sendDone() sometimes returns > > FALSE although > > > the receiver received a packet. > > > > > > > > > Does anybody have an idea? > > > > > > > This sounds like lost ack. > > > > - om_p > _______________________________________________ > Tinyos-help mailing list > Tinyos-help@millennium.berkeley.edu > https://www.millennium.berkeley.edu/cgi- > bin/mailman/listinfo/tinyos-help
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