Checkout the CC2420 datasheet for details regarding the 802.15.4 header strucutre.
On Tue, Feb 5, 2013 at 2:17 PM, Filip Jurnečka <[email protected]>wrote: > Hi there. > > I wonder how the packet delimiters work. Say I have two packets. If sent > normally, the BS app displays them as: > 00 FF FF 00 01 00 22 80 > 00 FF FF 00 01 01 22 80 00 > > Now I don't know what the first 00 is, but the next FFFF is the broadcast > address, the 0001 should be my address, the next 00/01 defines the length > of the packet data. What is the 22? What is the 80? Is it the delimiter of > the data to follow? Obviously, the last 00 is the data sent. > > Now it gets more interesting, if I enable the in-line CBC-MAC with 4 bytes > output, I get the following. > 00 FF FF 00 01 03 22 B7 E2 4C FB > 00 FF FF 00 01 04 22 80 71 36 57 EE > > The question is mainly about the fact that the output is overriding the > last byte of the unauthenticated message, i.e. the delimiter or the > payload byte. Any ideas why and how to fix it? > > Best regards, > Filip Jurnecka > _______________________________________________ > Tinyos-help mailing list > [email protected] > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > -- Wasif Masood
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