[aprssig] Trying to Specify the CRC-16-CCITT FCS
kennethfinnegan2007 at gmail.com
Thu Jun 26 15:34:59 CDT 2014
I've been working on trying to specify the frame check sum we use for
Bell 202/HDLC for my thesis. Do we really not have some kind of spec
document like for AX.25 or APRS for layer 1? I've been able to find a
few disjoint articles on the topic, and have been working out of ITU
V.23 and V.42, but the checksum calculation has really got me stumped.
Does anyone have a known-good code snippet that generates the correct
CRC given a complete frame? Attached is what I have working off of a
few examples online but they all seem to generate different results,
particularly for empty sets... The endianess is a total mess, so which
byte gets sent first?
-------------- next part --------------
A non-text attachment was scrubbed...
Size: 73038 bytes
Desc: not available
More information about the aprssig