Hi,
I have two connected questions wrt Radio interface in TinyOS (1.x
and Boomerang). I am using tmote-sky in Boomerang environment.
1. I am using the CC2420RadioC/M components to send data packets and
timestamping at the following places:
a. Just prior to calling send command (say T1)
b. At SFD fire (using CC2420TimeStampingC/M) (say T2)
c. At sendDone event. (say T3)
Even when I am disabling back-offs in CC2420M I am seeing a random
delay (in T2-T1) of the order of 2-9 ms. Part of the time can be
attributed to SPI transfer from MSP430 RAM to CC2420 RAM (around 1.7ms
for 36 bytes) but what is causing the rest of the delay?
2. In the above calculations I used a SPI transfer rate of 162Kbps
between MSP430 RAM and Radio RAM which I have obtained doing some
experiments. Is it defined somewhere or default rate? Can it be
increased or changed? If yes where?
I can send the code in case ...
Thanks & Regards,
Nilesh
--
Nilesh Mishra
Department of Computer Science and Engineering,
Indian Institute of Technology Kanpur
Kanpur, India
mail: [EMAIL PROTECTED]
[EMAIL PROTECTED]
[EMAIL PROTECTED]
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