I thing that's in the octavetech page, but I believe it is all bytes
including header, before escapes are applied.
I'm not sure but I think the pre-amble 7E 4x is not included.
MS
jurin dan wrote:
thanks a lot for your reply.
just one more thing. within the raw data packet, which byte do i use to
compute the CRC.
is it all byte or only TOS_MSG byte.
------------------------------------------------------------------------
> Date: Sun, 8 Apr 2007 17:22:29 -0600
> From: [EMAIL PROTECTED]
> To: [EMAIL PROTECTED]
> CC: [email protected]
> Subject: Re: [Tinyos-help] CRC checking
>
> This site describes the message format and CRC calculation:
>
http://www.octavetech.com/pubs/TB5-01%20Deciphering%20TinyOS%20Serial%20Packets.pdf
>
> There's also code in TOS (well...duh) and the java tools which
> does the CRC. I know one is called crc.java
>
> MS
>
> jurin dan wrote:
> >
> > hi,
> >
> > i have the raw data packet below receive with xlisten app:
> >
> >
> > *$ xlisten -r -b=mica2 -s=COM4 -t*
> >
> > *xlisten Ver:$Id: xlisten.c,v 1.2 2005/06/21 01:36:06 pipeng Exp $*
> >
> > *Using params: [baud=0x1001] [raw] [timed]*
> >
> > *COM4 input stream opened*
> >
> > *[2007/04/04 10:40:35]*
> >
> >
*7e42ffff007d5d1d840101009101000000007100000031037d5d0230030000000000000000007964
> > [40]*
> >
> >
> > CRC = 0x6479 (last bytes)
> >
> > i woul like to know how i could use the CRC to check the integrity of
> > the transmitted packet.
> > and which byte of the packet are taking in acount to compute the CRC.
> >
> > thanx for your help
> >
> >
> >
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