Rapid switching between GPS receivers can cause real problems.
Switch if:
1) secondary GPS has 1 more satellite for at least 20 seconds
OR
2) secondary GPS has 2 more satellites for at least 5 seconds
Fixes https://github.com/diydrones/ardupilot/pull/2320
DRIVER FEATURES:
- All logic for RTK vs Normal now lives inside Piksi
- Supports observation uplink through telem radio
- Supports full SBP packet logging
- Reports high-rate green blinking to indicate RTK lock.
- Switchable to accept only Float or Integer RTK locks.
THIS REQUIRES PIKSI FIRMWARE v0.14 OR HIGHER
- Uses Piksi's new Pseudo-Absolute-Positioning mode
- Onboard Piksi must have Pseudo-Absolute mode enabled
- Ground Station Piksi must have a surveyed location in settings
- Ground Station Piksi must send its location to Onboard Piksi.
NEXT STEPS REQUIRED:
- EKF needs to take higher accuracy GPS into account
- EKF needs to take GPS RTK height into account
- GCS needs to support sending SBP observation packets
--- MAVProxy patch forthcoming
GNSS modules handled by PX4 drivers are not auto-detectable, some are not even
connected to a UART port. The activation is therefore controlled by GPS_TYPE
only. Baud rate and port settings (if applicable) have to be handled by the PX4
firmware.
This only works for the centralised builder, the modified Arduino IDE
will still include the NMEA and SIRF drivers meaning it will require
approximately 4k additional flash which may push us over the limit on
the APM2. Users will instead need to exclude other features to get
below the APM1/2 flash limit.
This is the SBP driver for Piksi, Lodestar and other forthcoming Swift Navigation GPSes.
This driver currently implements three things:
- Implements a lightweight SBP protocol detection system
- Implements Piksi as a single-point-positioning GPS (same as ublox/others)
- Implements hardware logging of GPS health and baseline messages
Forthcoming iin future updates:
- Need to implement the RTK functionality
This is a complete rewrite of the GPS driver structure, with a static
main driver and separate backend drivers. This will allow proper
support for multiple GPSes, and will allow parameters to be set on the
GPS object
This should obsolete AP_GPS_HIL as it's a little more versatile (and it will generate cheaper code).
git-svn-id: https://arducopter.googlecode.com/svn/trunk@1336 f9c3cf11-9bcb-44bc-f272-b75c42450872
Nuke AP_GPS_IMU, as nothing is using it anymore.
Simplify the handling of no GPS/no fix detection.
Fix prototypes for ::init and ::read.
Update AP_GPS_Auto and corresponding example, nearly ready for primetime.
Use uint8_t rather than byte.
Strip some _error() calls to save space. More could still go.
git-svn-id: https://arducopter.googlecode.com/svn/trunk@1246 f9c3cf11-9bcb-44bc-f272-b75c42450872
Note that this is currently disabled as changes need to be made to APM to support it.
Tested with MTK, u-blox and SiRF GPS'.
git-svn-id: https://arducopter.googlecode.com/svn/trunk@671 f9c3cf11-9bcb-44bc-f272-b75c42450872
Tom Pittenger
Andrew Tridgell
Micheal Knight
Niels Joubert
Randy Mackay
Holger Steinhaus
Jonathan Challinger
Andrew Tridgell
Craig@3DR
uncrustify
deweibel@gmail.com
DrZiplok
DrZiplok@gmail.com
james.goppert
deweibel
jasonshort