diff options
Diffstat (limited to 'recipes-navigation/gpsd/gpsd/gpsd-default')
| -rw-r--r-- | recipes-navigation/gpsd/gpsd/gpsd-default | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/recipes-navigation/gpsd/gpsd/gpsd-default b/recipes-navigation/gpsd/gpsd/gpsd-default index 5c59791..bb4df93 100644 --- a/recipes-navigation/gpsd/gpsd/gpsd-default +++ b/recipes-navigation/gpsd/gpsd/gpsd-default @@ -27,3 +27,46 @@ GPS_FIXFILE=/var/run/gpsfix # 04 GPS + dead reckoning combined # 05 Time only fix GPSFIX="03 05" + +# U-Blox defaults to 9600. If the +# default speed is not set before changing +# the baud rate, this does not work +# except right after a boot when the speed +# is 9600 baud. +# +# 115200 baud is preferred to reduce the CPU +# load. Also, u-blox mode is preferred to +# nmea, as it is more efficient. +# +# We check for U-Blox first, because +# we do not set the baud rate of other +# GPS types. +# +# This gpsctl does not always work, because +# the line speed might be wrong, so if we +# fail, we change the baud rate and try again. +# +# There should only be two speeds, 115200 +# or 9600. +# +# If the line speed is already 115200, we +# should not need to change the baud rate. +# +read -r -d '' SET_GPS_SPEED <<"EOF" +if [[ $(cat /run/config/gpstype) == u-blox ]] ; then + logger -t gpsd -p daemon.info "Attempting to set baud rate to ${GPS_BAUD}" + if ! gpsctl -T 20 -t u-blox -s $GPS_BAUD -b -f $GPS_LINE ; then + logger -t gpsd -p daemon.info "WARNING: Unable to set GPS serial port speed." + stty -F $GPS_LINE 9600 + if ! gpsctl -T 20 -t u-blox -s $GPS_BAUD -b -f $GPS_LINE ; then + logger -t gpsd -p daemon.info "WARNING: Unable to set GPS serial port speed." + fi + fi + stty -F $GPS_LINE $GPS_BAUD + logger -t gpsd -p daemon.info "Expect a timeout error here. Need this error." + gpsctl -T 2 -f $GPS_LINE + stty -F $GPS_LINE $GPS_BAUD +fi +EOF + + |