Hammerhead/Protocol
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\xfc: packet end | \xfc: packet end | ||
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| + | GPS signals at wikipedia seems to be required reading: http://en.wikipedia.org/wiki/GPS_signals | ||
Revision as of 20:20, 27 April 2007
Christian did some stracing on TomTom device, and result is great logs at http://www.maintech.de/download/hammerhead-strace.log .
GPS seems to communicate in packets.
Direction GPS -> machine
read(3, "\xfe\x00\xfd\x80\x16\x19\x0b\x00\x00\xfc", 2048) = 10
\xfe: begining of packet \x00: type of packet? seems to determine length. \xfd: follows .... \xfc: packet end
GPS signals at wikipedia seems to be required reading: http://en.wikipedia.org/wiki/GPS_signals
