On Mar 23, 2008, at 9:34 AM, Jun wrote:
Hi All,
I recently observed some unexpected behavior of cc2420 radio, which
happened
when I try to send a high priority packet that would cancel pending
packet
that has been loaded to cc2420 TXFIFO.
It seems that SFLUSHTX strobe does not flush the loaded data from
TXFIFO.
I first called CSN.clr, SFLUSHTX.strobe, CSN.set to cancel the
pending data
which is 40 bytes.
Then I wrote a new packet of 11 bytes (just cc2420 header) to TXFIFO
using
loadTXFIFO and no error is observed.
The strange behavior from this point. After calling the STXONCC
strobe,
a receiving node got a packet of 40 bytes rather than the newly
loaded packet
which is only 11 bytes. I ran same code on micaz and telosb and got
exactly
the same results.
Did I do anything wrong when involving SFLUSHTX.strobe?
Does anyone have any idea on this strange behavior of cc2420?
Thanks in advance for your help,
Jun
I don't know where the problem is, but it's definitely the case that
SFLUSHTX works: Jung Il (cc'd) uses it quite often in his research.
Phil
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