Hi Umesh,
that's just the ordinary escaping scheme of the 0x7D sync byte. It's done
by stuffing a 0x7D into the stream and XORing the actual byte with 0x20
(0x7D xor 0x20 = 0x5D). In your case, the crc happens to have 0x7D on that
line. A search on the list will tell you more if you want.
Regards,
Harri
At 01:04 PM 3/10/2006 +0700, S. Umesh Babu wrote:
Hello,
I am sending some packets from two micaz motes to base station.The data
observed using xlisten program.Some times i am getting crc value 3
bytes.Actually it should be 2 bytes according to TOS_Msg structure.Can
somebody explain me this.
something like following.I should get all 15 byte packets.But sometimes i
am getting 16 and larger size packets.I am using
tinyos-1.1.7July2004cvs-2.
7e42ffff0481060f0000040100cfa2 [15]
7e42ffff0481060e00fe010200db64 [15]
7e42ffff048106100000040100487d5d [16]
7e42ffff0481060f00000202003c45 [15]
Thankyou
Umesh
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