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[aprssig] APRS frame check (CRC-16) code

Chris Moulding chrism at crosscountrywireless.net
Sun Jan 10 09:41:18 UTC 2010


I'm looking at using PSK-63 on HF as a transmission medium for APRS packets.

So far I've got a working program to send and receive APRS formatted 
packets over PSK-63 but now I want to add the frame check sequence 
(CRC-16) to each packet so that corrupted packets are rejected at the 
receive station before they are sent to the APRS-IS.

Does any one have any working code for the frame check sequence (I'm 
using Visual Basic 6) or can you point me in the right direction?

73,

Chris, G4HYG

-- 
Chris Moulding
Cross Country Wireless (2009) Ltd
7 Thirlmere Grove, Bolton, Lancs, BL4 0QB, UK
Tel/fax: +44(0)1204 410626
Mobile:  +44(0)7752 391908
Website: http://www.crosscountrywireless.net
Company number 6780346 registered in England and Wales  




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