Lets keep this on the help list....
As for loop 1, if you enable ACKs in the protocol they are handled
in the lower levels and sendDone() is not called until the message
is ACKed or times out. Search this list for many ACK explanations,
and references to my robocode that makes extensive use of ACKs.
As for message copy. You need a message buffer that lasts at least
until all the sends are Done. If you can keep track of the buffer
from the original message then you can just re-use it, otherwise
you should copy it before trying to send again because the send
operation will last longer than the scope of the function call,
task or not...
MS
ram kishore wrote:
> Hi,
>
> I put loop 1 because I want a message (ACK) to be received after a
> message is sent.Thats why I switched to Receiving mode.
> Secondly,putting the re-transmit into separate task and post it form
> done() would require the message to be copied again, which is memory
> inefficient.
>
> Regards,
> Kishore
>
> On Tue, Jul 29, 2008 at 11:28 PM, Michael Schippling <[EMAIL PROTECTED]>
> wrote:
>> beats me...why are you doing loop 1? by the time you get to done()
>> transmission should be complete. Also I would put the re-transmit
>> into a separate task and post it from done()...
>>
>> MS
>>
>> ram kishore wrote:
>>> Hi,
>>> I did the following:
>>>
>>> event result_t RsendMsg.sendDone(TOS_MsgPtr msg, result_t
>>> success)
>>> {
>>> result_t txmode,sndmsg;
>>>
>>> TOSH_uwait(1000);
>>>
>>> do{
>>> /*LOOP 1*/
>>> txmode = call CC1000Control.RxMode();
>>> }while(!txmode);
>>> if ( txmode == SUCCESS )
>>> call CLeds.yellowOff();
>>>
>>> do{
>>> /* LOOP2*/
>>> sndmsg = call RsendMsg.send(TOS_BCAST_ADDR,12,msg);
>>> }while(!sndmsg);
>>> if ( sndmsg == SUCCESS )
>>> call CLeds.yellowOn();
>>>
>>> return SUCCESS;
>>> }
>>>
>>> If I remove LOOP 1, then retransmissions occur.But, when LOOP 1 is
>>> included no retransmissions occur.
>>> What could be the reason.?
>>>
>>> Regards,
>>> Kishore
>>> On Mon, Jul 28, 2008 at 11:44 PM, Michael Schippling <[EMAIL PROTECTED]>
>>> wrote:
>>>> Just some things to try...
>>>>
>>>> I'd bet that the message buffer gets reused or erased before your
>>>> second send can complete. You may also have trouble calling the
>>>> send directly from the done, since done is in an "event"
>>>> context which is sometimes tantamount to an interrupt, perhaps
>>>> try copying the message and posting a task to resend?
>>>>
>>>> Another possibility is that you are walking over the "normal"
>>>> send process. You should check the result of the second send
>>>> to see if it's giving you an error. And you may need to put
>>>> in some condition variable to block simultaneous sends.
>>>>
>>>> All that said, TOSBase seems to be a bit of a
>>>> hack-to-get-things-to-work so it might not be
>>>> easy to modify....
>>>>
>>>> MS
>>>>
>>>>
>>>> ram kishore wrote:
>>>>> Hi all,
>>>>> I am using TOS1.1.10 .In the standard receiver application
>>>>> TOSBase. I am trying to retransmit the message.I sent a message by
>>>>> calling
>>>>>
>>>>> call RadioSend.send(gpTxMsg);.
>>>>>
>>>>> For this RadioSend.sendDone(TOS_MsgPtr Msg, result_t success)
>>>>> event is generated.
>>>>> Hoping that Msg is a pointer to the already transmitted
>>>>> message,I call
>>>>>
>>>>> call RadioSend.send(Msg); to retransmit the same message again.
>>>>>
>>>>> But the message is not being re-transmitted .
>>>>>
>>>>> Can somebody tell me what is wrong or how to accomplish
>>>>> retransmission?
>>>>>
>>>>> Regards,
>>>>> Kishore
>>>>> _______________________________________________
>>>>> Tinyos-help mailing list
>>>>> [email protected]
>>>>> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
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