AP_ADSB: uAvionix Transponder Updates

[nicholas-inocencio]

This PR contains updates to the interface with the ping200X. Co-requisite with the MissionPlanner PR ArduPilot/MissionPlanner#3429

Changes:

• Added parsing for GDL90 Transponder Status V3
  • Fixes buggy behavior when ping200X has both UCP and UCP-HD out protocols enabled
  • Includes new fields for on-ground state, board temperature, NIC, and NACp.
• Improved behavior when ping200X times out (due to power loss, serial connection error, etc.)
  • UAVIONIX_ADSB_OUT_STATUS_FAULT_STATUS_MESSAGE_UNAVAIL is now 1 if the GDL90 ownship, transponder status, and heartbeat have been missed for 10 seconds, and is otherwise 0 when one of those messages is received. See the co-requisite MissionPlanner PR for changes to how the GCS handles that field.
• Added support for using the ArduPilot's GPS as a GPS source for the ping200X
  • Previously, the ping200X needed its own GPS (usually a truFYX) connected to it in order to work properly
  • Setting ADSB_OPTIONS=1, which forwarded the AP's GPS data to the transponder, would result in a NIC of UNKNOWN due to an invalid HPL
    • HPL is now estimated using the horizontal accuracy
• Improved initialization of control message and frontend status
  • Attempts to poll ping200X for config message to set the control message defaults
  • Fixes a display error where a squawk of 0 was listed when the transponder had never been powered before connecting to the GCS

[magicrub]

Hi @nicholas-inocencio. I can help you out on these PRs!

[nicholas-inocencio]

Closed due to targeting the wrong branch, opened 28419 which rebases the commits onto master instead.

[magicrub]

replaced by PR #28419