GitHub - nall/garmin-transmogrifier: Hardware and software to convert Garmin's proprietary protocol over USB to NMEA sentences over RS-232

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Hardware and software to convert Garmin's proprietary protocol over USB to NMEA sentences over RS-232

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Name		Name	Last commit message	Last commit date
Latest commit History 39 Commits
doc		doc
eagle		eagle
src		src
.gitignore		.gitignore
Makefile		Makefile
README		README
config.mk		config.mk
gt.tmproj		gt.tmproj

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This project is to create hardware and software to connect a USB-based Garmin GPS to a RS-232 based system. Further, it confgures the GPS to periodically send its coordinates and converts those to NMEA standard sentences before sending it to the RS-232 port.

Useful links:

AT90USB647 Reference:
http://www.atmel.com/dyn/resources/prod_documents/7593S.pdf

AVR USB Library for AT90USBxxx Microcontrollers:
http://www.atmel.com/dyn/resources/prod_documents/doc7675.pdf

Garmin Device Interface Protocol Information:
http://www8.garmin.com/support/commProtocol.html