Hi David,
I tried to search for the PacketLink component, but it seems not many
people is using it, moreover it does not have any kind of reference in
nesdoc, only the TEP.
I found the example of PacketLink, more specific TestPacketLink, in the
tinyos-2.x-contrib folder and even after i update it, it still don't
compile, since as far as i know is missing the file: TestCase.h.
Can you give us a clear example on how to use this component? or maybe
send us the .h file, since i really need to write a reliable BaseStation
application.
Thanks in adavance,
Tiago
Uniiversity of Coimbra
------------------
www.sounatural.com
David Moss wrote:
Sure - you can modify the basestation application to retransmit if you don't
get an ack. Take a look at the PacketLink component and interface, it will
help you do so automatically. For my deployment applications where good
connectivity is required, I've modified base station to use the PacketLink
interface to automatically retry failed transmissions.
The acks will not automatically retransmit your packet, but will let you
know if a single send got through or not.
-David
-----Original Message-----
From: André Miguel de Almeida Marrão Rodrigues
[mailto:[EMAIL PROTECTED]
Sent: Thursday, December 13, 2007 3:04 PM
To: David Moss; [email protected]
Subject: Re: [Tinyos-help] Hardware Address Recognition
Hi
The base station does not automatically retransmit failed packets.
It means that I should change the code of the standard basestation that
comes with T2.02?
Includind adding buffer to allow retransmission of packets?
> interference - it's possible from wifi
collisions - in this configuration I think they should be very few
range - that's not an issue in this case
mismatched duty cycling parameters, etc. Did you modify your base station
application to configure the outbound packet for delivery to a duty cycling
receiver - yes we did
So if the major problem is interference the acks shoudn't have resolved it?
Thanks,
André Rodrigues
-----Original Message-----
From: André Miguel de Almeida Marrão Rodrigues
[mailto:[EMAIL PROTECTED]
Sent: Thursday, December 13, 2007 11:20 AM
To: David Moss; 'André Cunha'; 'TinyOS ML'
Subject: Re: [Tinyos-help] Hardware Address Recognition
Hi
I would like to know why in a simple configuration like
BS <---> Node
I have packet loss when the acks are enabled and the code in the node
retransmits
the packed if it get lost. We are using 2% low power listening mode in T2 /
TMote.
Any ideias would be very apreciated.
Regards,
André Rodrigues
PS: If a packet get lost in the BS -> node direction, the 2.02 basestation
code does
the retransmission?
----- Original Message -----
From: "David Moss" <[EMAIL PROTECTED]>
To: "'André Cunha'" <[EMAIL PROTECTED]>; "'TinyOS ML'"
<[email protected]>
Sent: Thursday, December 13, 2007 5:16 PM
Subject: RE: [Tinyos-help] Hardware Address Recognition
Address recognition is in both hardware and software. You can disable
address recognition in hardware to sniff packets, but with software
acknowledgements enabled you don't want to send an ack back unless you've
received a packet to your local address or to the broadcast address.
That's
why there's a redundant check.
Hardware address recognition is enabled by default, and the redundant
software address check performed for acknowledgements doesn't change that.
Note at the top of CC2420ControlP the compile time options you have
available (you should be able to configure these at runtime as well)
#if defined(CC2420_NO_ACKNOWLEDGEMENTS)
autoAckEnabled = FALSE;
#else
autoAckEnabled = TRUE;
#endif
#if defined(CC2420_HW_ACKNOWLEDGEMENTS)
hwAutoAckDefault = TRUE;
#else
hwAutoAckDefault = FALSE;
#endif
// This changes the hardware address recognition.
#if defined(CC2420_NO_ADDRESS_RECOGNITION)
addressRecognition = FALSE;
#else
addressRecognition = TRUE;
#endif
-David
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of André
Cunha
Sent: Thursday, December 13, 2007 9:21 AM
To: TinyOS ML
Subject: [Tinyos-help] Hardware Address Recognition
Hello all,
I was looking at the hardware recognition in the CC2420 in the file
CC2420ControlP and, if fact, the CC2420 register (MDMCTRL0->ADDR_DECODE)
is enabled. Looking at the CC2420ReceiveP in the RXFIFO.readDone I
realized that the address verification is by software. Can anyone
clarify this? I have changed the code of RXFIFO.readDone to only signal
data reception but I would like to activate the hardware address
recognition.
Best Regards,
André
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--
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