gpsbabel serial option

gpsbebel 遅い問題．

• Magellan serial protocol (magellan)

http://www.gpsbabel.org/htmldoc-development/fmt_magellan1.html

• NMEA 0183 sentences (nmea)

http://www.gpsbabel.org/htmldoc-development/fmt_nmea.html

magellan/nmea にはbaud option で通信速度変更出来るみたい．
Garmin にはこのoption は無さそう…．

• Garmin serial/USB protocol (garmin)

http://www.gpsbabel.org/htmldoc-1.3.0/fmt_garmin.html