Overhauls the DShot driver with per-timer BDShot selection, multi-timer
sequential capture, Extended DShot Telemetry (EDT), and AM32 ESC EEPROM
read/write via MAVLink. Expands ESC support from 8 to 12 channels.
BDShot:
- Per-timer BDShot protocol selection via actuator config UI
- Multi-timer sequential burst/capture on any DMA-capable timer
- Adaptive per-channel GCR bitstream decoding
- Per-channel online/offline detection with hysteresis
Extended DShot Telemetry (EDT):
- Temperature, voltage, current from BDShot frames (no serial wire)
- New DSHOT_BIDIR_EDT parameter
- EDT data merged with serial telemetry when both available
AM32 EEPROM:
- Read/write AM32 ESC settings via MAVLink ESC_EEPROM message
- ESCSettingsInterface abstraction for future ESC firmware types
- New DSHOT_ESC_TYPE parameter
Other changes:
- Per-motor pole count params DSHOT_MOT_POL1–12 (replaces MOT_POLE_COUNT)
- EscStatus/EscReport expanded to 12 ESCs with uint16 bitmasks
- Numerous bounds-check, overflow, and concurrency fixes
- Updated DShot documentation
In dd2322d622, the local PressureToAltitude(pressure_pa, temperature)
was replaced with the shared getAltitudeFromPressure(pressure_pa,
pressure_sealevel_pa), but the call sites continued passing temperature
where sea-level pressure was expected. This caused the binary search to
never converge, hanging "commander calibrate baro" indefinitely.
The original function used measured temperature in its hypsometric
equation. The replacement uses standard atmosphere temperature (15C)
internally, which is sufficient since the calibration computes a
relative offset against GPS altitude.
- Pass kPressRefSeaLevelPa as the second argument instead of temperature
- Remove the now-unused temperature accumulation
- Replace unbounded while loop with iteration-capped for loop to prevent
hangs from float precision stalls, matching VehicleAirData.cpp
On Linux targets with high-rate external sensor data (>1000Hz), all
sensor calibrations (gyro, accel, mag) can freeze PX4 by starving
other threads of CPU. Normal flight is unaffected — only calibration
triggers the problem.
Two compounding issues in the calibration worker threads:
1. calibrate_cancel_check() creates a new uORB::Subscription on every
call, which triggers getDeviceNodeLocked() — an O(n) linear strcmp
scan through all uORB nodes. In gyro/mag calibration this was called
on every sensor sample, consuming the majority of CPU in strcmp alone.
2. SubscriptionBlocking::updatedBlocking() returns immediately when data
is already available (it only blocks when no data is pending). With
continuous high-rate sensor data, the calibration loops never yield,
spinning at 100% CPU.
These problems are addressed with this patch as follows:
- Throttle calibrate_cancel_check() to once per 200ms in gyro
and mag calibration loops.
- Add 1ms px4_usleep() yield before updatedBlocking()/updateBlocking()
in all calibration loops (gyro, accel, mag, orientation detection).
This caps the effective loop rate at ~1000Hz — still far above what
calibration needs (250-750 samples).
- Force Commander main loop to sleep during calibration so it does not
compete with calibration worker threads for CPU.
Tested under Linux (x64, aarch64) both with RT and non-RT scheduling,
with sensor data arriving at ~3600Hz. Calibration completes normally
and no longer results in a deadlocked process.
* feat: implement UAVCAN LED control for individual light control and assignment
* uavcan led: nit-picks from review
* uavcan led: reduce maximum number of lights
to avoid unused parameters
* uavcan led: simplify anticolision on check
* uavcan led: correctly map 8-bit RGB to rgb565
* Trim param name character arrays to 17
16 characters + \0 termination
* uavcan led: final nit-picks
---------
Co-authored-by: Matthias Grob <maetugr@gmail.com>
previous to this
09d79b221f
set `esc_online_flags` e.g. for UAVCAN ESCs which specific one is online and that then got compared to a mask where the first `esc_count` bits were set.
So if only ESC 5 is mapped and online you get the message "ESC 156 offline" because `esc_online_flags = 0b1000` gets compared to `online_bitmask = 0b1` based on `esc_count = 1` and the motor index is `esc[0].actuator_function = 0` wrapped using `0 - actuator_motors_s::ACTUATOR_FUNCTION_MOTOR1 + 1 = 156`.
Matthias Grob