Garble
Garble is a console program for downloading data (waypoints, proximity waypoints, tracks, and routes) from Garmin GPS receivers. Garble is based on a portable library that implements most of the Garmin communications protocol, and supports most Garmin GPS receivers. Garble can also read the current time and postion from the GPS, get the product data, and turn off the GPS. Garble has been tested on a GPS 12XL (firmware 3.53) and a GPS III .
| Tags | Scientific/Engineering Utilities Communications |
|---|---|
| Licenses | GPL |
| Operating Systems | POSIX |
| Implementation | C++ |
- All comments
Recent commentsvariable output precision
by default garble outputs lat/lon and distances to a max of 6 digits. i have a patch to v1.0.1 which lets you specify the precision you want with the --precision flag. it's at http://www.pdos.lcs.mit.edu/~decouto/garble/precision-patch
note that the unit only reports lat/lon as 32 bits each, which is something between 10 an 11 decimal digits of precision. i don't think the gps units actually measure that much though.
let me know if you find this useful
d
bug and bug fix
PROBLEM:
There is a bug in the serial port code of Garble such that it does not
set the serial port it uses for the GPS to raw mode. Some ports,
notably the /dev/ttyS0 etc. recommended by the README for connecting
with the GPS do some processing by default on the input so that the
Garmin GPS data gets corrupted -- thus Garble times out waiting for
the GPS to respond.
FIX:
Use /dev/cua0 or /dev/cua1 instead of /dev/ttyS0 or /dev/ttyS1 --
these ports do not do any processing by default. Also, I think that
running
stty -f /dev/gps raw
will also turn off all the unwanted processing. Replace /dev/gps with
the appropriate device name.
There will be patch posted for this within the next few days.
d
--
Douglas S. J. De Couto decouto@lcs.mit.edu