Shell
Shell
Command Mavlink
pxh> mavlink help
### Description
This module implements the MAVLink protocol, which can be used on a Serial link or UDP network connection.
It communicates with the system via uORB: some messages are directly handled in the module (eg. mission
protocol), others are published via uORB (eg. vehicle_command).
Streams are used to send periodic messages with a specific rate, such as the vehicle attitude.
When starting the mavlink instance, a mode can be specified, which defines the set of enabled streams with their rates.
For a running instance, streams can be configured via `mavlink stream` command.
There can be multiple independent instances of the module, each connected to one serial device or network port.
### Implementation
The implementation uses 2 threads, a sending and a receiving thread. The sender runs at a fixed rate and dynamically
reduces the rates of the streams if the combined bandwidth is higher than the configured rate (`-r`) or the
physical link becomes saturated. This can be checked with `mavlink status`, see if `rate mult` is less than 1.
**Careful**: some of the data is accessed and modified from both threads, so when changing code or extend the
functionality, this needs to be take into account, in order to avoid race conditions and corrupt data.
### Examples
Start mavlink on ttyS1 serial with baudrate 921600 and maximum sending rate of 80kB/s:
$ mavlink start -d /dev/ttyS1 -b 921600 -m onboard -r 80000
Start mavlink on UDP port 14556 and enable the HIGHRES_IMU message with 50Hz:
$ mavlink start -u 14556 -r 1000000
$ mavlink stream -u 14556 -s HIGHRES_IMU -r 50
...Command Sensors
pxh> sensors help
### Description
The sensors module is central to the whole system. It takes low-level output from drivers, turns
it into a more usable form, and publishes it for the rest of the system.
The provided functionality includes:
- Read the output from the sensor drivers (`sensor_gyro`, etc.).
If there are multiple of the same type, do voting and failover handling.
Then apply the board rotation and temperature calibration (if enabled). And finally publish the data; one of the
topics is `sensor_combined`, used by many parts of the system.
- Do RC channel mapping: read the raw input channels (`input_rc`), then apply the calibration, map the RC channels
to the configured channels & mode switches, low-pass filter, and then publish as `rc_channels` and
`manual_control_setpoint`.
- Read the output from the ADC driver (via ioctl interface) and publish `battery_status`.
- Make sure the sensor drivers get the updated calibration parameters (scale & offset) when the parameters change or
on startup. The sensor drivers use the ioctl interface for parameter updates. For this to work properly, the
sensor drivers must already be running when `sensors` is started.
- Do preflight sensor consistency checks and publish the `sensor_preflight` topic.
### Implementation
It runs in its own thread and polls on the currently selected gyro topic.
Usage: sensors <command> [arguments...]
Commands:
start
[-h] Start in HIL mode
stop
status print status info
pxh> sensors status
INFO [sensors] gyro status:
INFO [lib__ecl] validator: best: 0, prev best: 0, failsafe: NO (0 events)
INFO [lib__ecl] sensor #0, prio: 100, state: OK
INFO [lib__ecl] val: 0.0039, lp: -0.0002 mean dev: 0.0000 RMS: 0.0065 conf: 1.0000
INFO [lib__ecl] val: 0.0048, lp: -0.0004 mean dev: 0.0000 RMS: 0.0065 conf: 1.0000
INFO [lib__ecl] val: -0.0002, lp: 0.0005 mean dev: -0.0000 RMS: 0.0065 conf: 1.0000
INFO [sensors] accel status:
INFO [lib__ecl] validator: best: 0, prev best: 0, failsafe: NO (0 events)
INFO [lib__ecl] sensor #0, prio: 100, state: OK
INFO [lib__ecl] val: -0.0219, lp: -0.0011 mean dev: 0.0000 RMS: 0.0327 conf: 1.0000
INFO [lib__ecl] val: -0.0463, lp: -0.0001 mean dev: 0.0001 RMS: 0.0326 conf: 1.0000
INFO [lib__ecl] val: -9.8411, lp: -9.8098 mean dev: -0.0001 RMS: 0.0327 conf: 1.0000
INFO [lib__ecl] sensor #1, prio: 75, state: OK
INFO [lib__ecl] val: -0.1093, lp: 0.0007 mean dev: -0.0002 RMS: 0.0499 conf: 1.0000
INFO [lib__ecl] val: -0.0478, lp: -0.0015 mean dev: 0.0001 RMS: 0.0505 conf: 1.0000
INFO [lib__ecl] val: -9.7975, lp: -9.8113 mean dev: -0.0001 RMS: 0.0503 conf: 1.0000
INFO [sensors] mag status:
INFO [lib__ecl] validator: best: 0, prev best: 0, failsafe: NO (0 events)
INFO [lib__ecl] sensor #0, prio: 50, state: OK
INFO [lib__ecl] val: 0.8874, lp: 0.8977 mean dev: -0.0000 RMS: 0.0050 conf: 1.0000
INFO [lib__ecl] val: 0.0264, lp: 0.0331 mean dev: 0.0000 RMS: 0.0050 conf: 1.0000
INFO [lib__ecl] val: 1.7816, lp: 1.7868 mean dev: -0.0000 RMS: 0.0050 conf: 1.0000
INFO [sensors] baro status:
INFO [lib__ecl] validator: best: 0, prev best: 0, failsafe: NO (0 events)
INFO [lib__ecl] sensor #0, prio: 75, state: OK
INFO [lib__ecl] val: 487.8885, lp: 487.9854 mean dev: -0.0009 RMS: 0.1011 conf: 1.0000
INFO [lib__ecl] val: 0.0000, lp: 0.0000 mean dev: 0.0000 RMS: 0.0000 conf: 1.0000
INFO [lib__ecl] val: 0.0000, lp: 0.0000 mean dev: 0.0000 RMS: 0.0000 conf: 1.0000
INFO [sensors] Temperature Compensation:
INFO [sensors] gyro: enabled: 0
INFO [sensors] accel: enabled: 0
INFO [sensors] baro: enabled: 0
INFO [sensors] Airspeed status:
INFO [lib__ecl] no data
pxh>user@workstation:~/src/Firmware$ cat /home/user/src/Firmware/posix-configs/SITL/init/ekf2/iris
uorb start
param load
dataman start
param set BAT_N_CELLS 3
param set CAL_ACC0_ID 1376264
param set CAL_ACC0_XOFF 0.01
param set CAL_ACC0_XSCALE 1.01
param set CAL_ACC0_YOFF -0.01
param set CAL_ACC0_YSCALE 1.01
param set CAL_ACC0_ZOFF 0.01
param set CAL_ACC0_ZSCALE 1.01
param set CAL_ACC1_ID 1310728
param set CAL_ACC1_XOFF 0.01
param set CAL_GYRO0_ID 2293768
param set CAL_GYRO0_XOFF 0.01
param set CAL_MAG0_ID 196616
param set CAL_MAG0_XOFF 0.01
param set COM_DISARM_LAND 3
param set COM_OBL_ACT 2
param set COM_OBL_RC_ACT 0
param set COM_OF_LOSS_T 5
param set COM_RC_IN_MODE 1
param set EKF2_AID_MASK 1
param set EKF2_ANGERR_INIT 0.01
param set EKF2_GBIAS_INIT 0.01
param set EKF2_HGT_MODE 0
param set EKF2_MAG_TYPE 1
param set MAV_TYPE 2
param set MC_PITCH_P 6
param set MC_PITCHRATE_P 0.2
param set MC_ROLL_P 6
param set MC_ROLLRATE_P 0.2
param set MIS_TAKEOFF_ALT 2.5
param set MPC_HOLD_MAX_Z 2.0
param set MPC_Z_VEL_I 0.15
param set MPC_Z_VEL_P 0.6
param set NAV_ACC_RAD 2.0
param set NAV_DLL_ACT 2
param set RTL_DESCEND_ALT 5.0
param set RTL_LAND_DELAY 5
param set RTL_RETURN_ALT 30.0
param set SENS_BOARD_ROT 0
param set SENS_BOARD_X_OFF 0.000001
param set SYS_AUTOSTART 4010
param set SYS_MC_EST_GROUP 2
param set SYS_RESTART_TYPE 2
replay tryapplyparams
simulator start -s
tone_alarm start
gyrosim start
accelsim start
barosim start
adcsim start
gpssim start
pwm_out_sim mode_pwm
sensors start
commander start
land_detector start multicopter
navigator start
ekf2 start
mc_pos_control start
mc_att_control start
mixer load /dev/pwm_output0 ROMFS/px4fmu_common/mixers/quad_dc.main.mix
mavlink start -x -u 14556 -r 4000000
mavlink start -x -u 14557 -r 4000000 -m onboard -o 14540
mavlink stream -r 50 -s POSITION_TARGET_LOCAL_NED -u 14556
mavlink stream -r 50 -s LOCAL_POSITION_NED -u 14556
mavlink stream -r 50 -s GLOBAL_POSITION_INT -u 14556
mavlink stream -r 50 -s ATTITUDE -u 14556
mavlink stream -r 50 -s ATTITUDE_QUATERNION -u 14556
mavlink stream -r 50 -s ATTITUDE_TARGET -u 14556
mavlink stream -r 50 -s SERVO_OUTPUT_RAW_0 -u 14556
mavlink stream -r 20 -s RC_CHANNELS -u 14556
mavlink stream -r 250 -s HIGHRES_IMU -u 14556
mavlink stream -r 10 -s OPTICAL_FLOW_RAD -u 14556
logger start -e -t
mavlink boot_complete
replay trystart
user@workstation:~/src/Firmware$Last updated