[Tinyos-devel] Copying directly from RxFIFO to TxFIFO of CC2420

[Razvan Musaloiu-E.]

Hi!

On Thu, 14 Aug 2008, Sagar Bijwe wrote:

> I should have elaborated more. I just needed to know whether there exists a
> control command (i could not find in CC2420 datasheet)  to transfer data
> directly from rxbuffer to txbuffer. I don't want to use any external kit for
> the purpose of programming CC2420. Driver level modifications can be handled
> once i know that such a command exists. According to current implemenation,
> we have to first copy pkt from rxbuffer to msp & then to txbuffer (this
> makes spi bus bottleneck). I want to remove this critical path. Thanks for
> your response anyway.

If this is what you want to do then you'll probably find relevant this 
paper:
 	http://www.sics.se/~adam/osterlind08approaching.pdf

All the best!
Razvan ME

> On Thu, Aug 14, 2008 at 2:04 AM, Eric Decker <cire831 at gmail.com> wrote:
>
>> How are you going to do that without programming the CC2420?
>> There has to be somekind of control signalling which has to touch the CC2420.
>> And there are state implications as well.
>>
>> It has to hook through the driver.  Starting with the CC2420 driver will be
>> necessary.
>>
>> eric
>>
>>
>> On Wed, Aug 13, 2008 at 12:39 PM, Sagar Bijwe <sag.bijwe at gmail.com> wrote:
>>
>>> Is there a way to copy directly from RxFIFO of CC2420 to TxFIFO?
>>> I'm looking for the improved pkt forwarding without programming CC2420
>>> itself.
>>>
>>>
>>> - Sagar Bijwe <http://sag.bijwe.googlepages.com/home.html>
>>>
>>>
>>>
>>>
>>
>>
>>
>