Andy Piper
bf08027404
terrain_srtm_alt_ms is zero until the first writeTerrainData, and imuSampleTime_ms counts from boot, so for the first five seconds of uptime the age test passes against a terrain altitude that is still zero. terrain_srtm_alt_valid then reports a terrain height the core has never received: FuseOptFlow scales flow from it, getHeightControlLimit drops the optical flow altitude cap, and getFilterStatus counts it towards relative position validity. On the ground at boot that costs little, since the value it invents is the height above an origin the vehicle is sitting on. It matters after an in-flight watchdog reset, where millis() restarts at zero and the vehicle comes back armed and flying. gndHgtValidTime_ms is guarded against exactly this one expression away, so this is the same idiom rather than a new one. The 5 s is named while it is being touched, because it is about to have a second user. No autotest: the window is the first five seconds of uptime and closes before healthy() opens, so SITL cannot enter it from a cold boot, and the in-flight reset that reaches it is not something the harness can stage.
ArduPilot Project
ArduPilot is the most advanced, full-featured, and reliable open source autopilot software available. It has been under development since 2010 by a diverse team of professional engineers, computer scientists, and community contributors. Our autopilot software is capable of controlling almost any vehicle system imaginable, from conventional airplanes, quad planes, multi-rotors, and helicopters to rovers, boats, balance bots, and even submarines. It is continually being expanded to provide support for new emerging vehicle types.
The ArduPilot project is made up of
User Support & Discussion Forums
-
Support Forum: https://discuss.ardupilot.org/
-
Community Site: https://ardupilot.org
Developer Information
-
Github repository: https://github.com/ArduPilot/ardupilot
-
Main developer wiki: https://ardupilot.org/dev/
-
Developer discussion: https://discuss.ardupilot.org
-
Developer chat: https://discord.com/channels/ardupilot
Top Contributors
- Flight code contributors
- Wiki contributors
- Most active support forum users
- Partners who contribute financially
How To Get Involved
-
The ArduPilot project is open source and we encourage participation and code contributions: guidelines for contributors to the ardupilot codebase
-
We have an active group of Beta Testers to help us improve our code: release procedures
-
Desired Enhancements and Bugs can be posted to the issues list.
-
Help other users with log analysis in the support forums
-
Improve the wiki and chat with other wiki editors on Discord #documentation
-
Contact the developers on one of the communication channels
License
The ArduPilot project is licensed under the GNU General Public License, version 3.
Maintainers
ArduPilot is comprised of several parts, vehicles and boards. The list below contains the people that regularly contribute to the project and are responsible for reviewing patches on their specific area.
- Andrew Tridgell:
- Vehicle: Plane, AntennaTracker
- Board: Pixhawk, Pixhawk2, PixRacer
- Francisco Ferreira:
- Bug Master
- Grant Morphett:
- Vehicle: Rover
- Willian Galvani:
- Vehicle: Sub
- Board: Navigator
- Michael du Breuil:
- Subsystem: Batteries
- Subsystem: GPS
- Subsystem: Scripting
- Peter Barker:
- Subsystem: DataFlash, Tools
- Randy Mackay:
- Vehicle: Copter, Rover, AntennaTracker
- Siddharth Purohit:
- Subsystem: CAN, Compass
- Board: Cube*
- Tom Pittenger:
- Vehicle: Plane
- Bill Geyer:
- Vehicle: TradHeli
- Emile Castelnuovo:
- Board: VRBrain
- Georgii Staroselskii:
- Board: NavIO
- Gustavo José de Sousa:
- Subsystem: Build system
- Julien Beraud:
- Board: Bebop & Bebop 2
- Leonard Hall:
- Subsystem: Copter attitude control and navigation
- Matt Lawrence:
- Vehicle: 3DR Solo & Solo based vehicles
- Matthias Badaire:
- Subsystem: FRSky
- Mirko Denecke:
- Board: BBBmini, BeagleBone Blue, PocketPilot
- Paul Riseborough:
- Subsystem: AP_NavEKF2
- Subsystem: AP_NavEKF3
- Víctor Mayoral Vilches:
- Board: PXF, Erle-Brain 2, PXFmini
- Amilcar Lucas:
- Subsystem: Marvelmind
- Samuel Tabor:
- Subsystem: Soaring/Gliding
- Henry Wurzburg:
- Subsystem: OSD
- Site: Wiki
- Peter Hall:
- Vehicle: Tailsitters
- Vehicle: Sailboat
- Subsystem: Scripting
- Andy Piper:
- Subsystem: Crossfire
- Subsystem: ESC
- Subsystem: OSD
- Subsystem: SmartAudio
- Alessandro Apostoli:
- Subsystem: Telemetry
- Subsystem: OSD
- Rishabh Singh:
- Subsystem: Avoidance/Proximity
- David Bussenschutt:
- Subsystem: ESP32,AP_HAL_ESP32
- Charles Villard:
- Subsystem: ESP32,AP_HAL_ESP32