- public_regulated_data_types in PX4/Firmware (1557f3a23461a144dd75edae4595665e5684597d): 7f5489e6e9
- public_regulated_data_types current upstream: 53a7dbbf85
- Changes: 7f5489e6e9...53a7dbbf85
53a7dbb 2021-03-31 Pavel Kirienko - Change wording in uavcan.pnp.NodeIDAllocationData to reflect the less static nature of UAVCAN v1 (#111)
c3aa82f 2021-03-23 Pavel Kirienko - Update Readiness as discussed at the DS-015 call
fcc1062 2021-03-16 Pavel Kirienko - Doc amendment for uavcan.register.Access: mapping between registers and environment variables (#109)
342f358 2021-02-22 Pavel Kirienko - Remove misleading comment in battery.Status.0.2
1baa9cb 2021-02-22 Pavel Kirienko - Add link to Nunaweb and synchronize the description with the front page (#108)
- include icm20948 on most boards by default
- create more test variants for default boards near flash limit (cuav_nora_test, cuav_x7pro_test, holybro_durandal-v1_test)
Tailsitter VTOLs very occasionally gets stuck with zero roll and pitch angle in multicopter mode after
a forward transition command is issued.
This very rare behavior is triggered by the following events:
1> a forward transition is triggered either in auto or manual mode.
2> in the vtol_att_control main loop, if multicopter and fixed wing attitude setpoints are not updated, transition state is not updated
3> the commander changes the vehicle status to transition mode.
4> multicopter pos controller initiated Transition flight task. This results in zero roll and pitch setpoint due to zero acceleration setpoint
5> now vtol_att_control executes and updates the transition state. Specifically, _q_trans_start and _q_trans_sp are set with zero roll and pitch sp
6> tilt is evaluated to be NaN, despite _q_trans_sp being normalized. This happens for 25% of all yaw angles when using float datatype. This can be
verified using the matrix library
7> once tilt is evaluated to be NaN, _q_trans_sp is never updated again and is stuck in this state for ever.
This has been fixed by constraining the cos(tilt) within +1 to -1 range
Further, _q_trans_start and _q_trans_sp are immedietly initialized after a transition event is triggered.
This changes the default mavlink message set from onboard to
onboard_low_bandwidth, which drastically reduces the bandwidth required to get a
usable connection.
- this is to help more users get the benefit (by default) and perhaps circumvent the common mistake of setting EKF2_HGT_MODE to range sensor
- this should be safe to enable as the range aid defaults are fairly conservative (max horizontal velocity 1 m/s, and range aid gate 1 SD)
statfs accesses the file-system and can be blocking for an extended period. Since the SD card check is part of the preflight checks in the main thread of commander, it could block its execution and cause various issues. The SD card is only mounted in rcS during boot so the state will not change after the first check.
- Source processing now happens on original source files:
- processing to line-by-line
- required overhaul of regex match patterns + processing
- pros:
- enable tracing of ambiguous parsing sites -- reports (module, file, line-number, line-contents)
- simplifies code
- reduces computational complexity
- cons:
- certain declarations are harder to parse: multiline declarations
- refactors:
- added specific subclasses for each: Publications, Subscriptions, Ambiguities
- added a "Scope" class to represent either a module ('ModuleScope') or a library ('LibraryScope')
- regexes:
- added cases for C++-style classes
- expanded C++-style regex cases to accommodate templates
- `ORB_ID::` is accepted wherever `ORB_ID(` is accepted
- adds 'orb_copy' regex to the subscription cases
- emit ambiguous-line warning for declarations with `ORB_ID` on the same line
- emit ambiguous-line warning for `ORB_ID` with a declaration on the same line
- changed 'module whitelist' to 'scope-whitelist'
- whitelist may now apply to libraries
- libraries are optionally merged with their depending modules (but not by default)
- may be merged with their depending modules with the `--merge-depends` cli flag
- eliminates some redundant 'special-case' handling code
- debug output
- raises exception and aborts if a topic is found outside of a scope
- debug output is now printed & filtered with the python 'logging' standard module
- alphabetizes topic output in debug logging
- fixes debug output if package dependencies are missing
- now warns on ambiguous matches
- prints a list of ambiguous source sites (aka warnings) on completion
- (still) emits a warning if we find ORB_ID outside of a scope
- adds warnings if any of the source paths are invalid
- do not emit debug output for modules outside of the module/scope whitelist
- Expand script's CLI parameters
- added 'none' output options: undocumented debugging option to silence file output while debugging
- added the `--merge-depends` cli flag -- merges output of modules & their dependee libraries
- the ekf2 frontend typically runs in the background for up to 30 seconds waiting for all instances to appear, but this isn't supported by the legacy posix launcher
This is to avoid race condition with the yaw emergency estimator having
the same trigger delay of 1 second. Commander will now give more time to
EKF2 to reset itself before switching to altitude mode.
px4_fmu-v4_uavcanv1 fails to build:
../../src/drivers/uavcan_v1/Uavcan.cpp: In static member function 'static int UavcanNode::start(uint32_t, uint32_t)':
../../src/drivers/uavcan_v1/Uavcan.cpp:140:29: error: 'interface' was not declared in this scope
140 | _instance = new UavcanNode(interface, node_id);
- ecl in PX4/Firmware (a730f0f5ce7a2cc909cb3d0dfab5f0106a9b3aeb): bb950a1550
- ecl current upstream: e3d1ade660
- Changes: bb950a1550...e3d1ade660
e3d1ade 2021-03-12 Daniel Agar - EKF: use flow for vel test ratio if only active source of horizontal aiding
I don't think we should be broadcasting by default as we haven't done
that in the past. This suddenly spams the network with a lot of
messages, and leads to confusing situations in offices where there are
multiple PX4 SITL and QGC intances are open.
- rotates accel & gyro FIFO data before publication both to simplify downstream usage (including log review) and fix other issues
- to best handle int16_t data rotations are now either performed with swaps if possible, otherwise promoted to float, rotated using the full rotation matrix, then rounded back to int16_t
- fix sensors/vehicle_angular_velocity filter reset both with proper rotation and new calibration uncorrect helper
- in FIFO case filtering is done before calibration is applied, but we need to handle a possible reset from a completely different sensor (vehicle body angular velocity -> sensor frame uncorrected data)
- sitl_gazebo in PX4/Firmware (6e9f745809c0c99e7c73efa3e40b87ad39f144e8): b195315b86
- sitl_gazebo current upstream: 1f339cdf5c
- Changes: b195315b86...1f339cdf5c
1f339cd 2021-03-20 Dongoo Lee - Pass ros_distro in CMakeLists.txt instaed of checking it in jinja_gen.py (#712)
1b1afca 2021-03-18 David Jablonski - gst camera: add RTMP streaming and nvidia encoding (#727)
- debug output is now printed & filtered with the python 'logging' standard module
- changed 'module whitelist' to 'scope-whitelist'
- whitelist may now apply to libraries
- libraries are not included by default
- may be merged with their depending modules with the `--merge-depends` cli flag
- eliminates redundant 'special-case' handling code
- greatly expands debugging output
- fixes debug output if package dependencies are missing
- still crashes on error matches
- now warns on ambiguous matches
- prints a list of ambiguous source sites (aka warnings) on completion
- adds warnings if any of the source paths are invalid
- do not emit debug output for modules outside of the module/scope whitelist
- Expand script's CLI parameters
- added 'none' output options: undocumented debugging option to silence file output while debugging
- added the `--merge-depends` cli flag -- merges output of modules & their dependee libraries
- Source processing now happens on original source files:
- processing to line-by-line
- required overhaul of regex match patterns + processing
- pros:
- enable tracing of ambiguous parsing sites -- reports (module, file, line-number, line-contents)
- simplifies code
- reduces computational complexity
- cons:
- certain declarations are harder to parse (multiline arrays)
- refactors:
- added specific subclasses for each: Publications, Subscriptions, Ambiguities
- added a "Scope" class to represent either a module ('ModuleScope') or a library ('LibraryScope')
With this change we prevent the case where arming silently fails within
the first 10 seconds after boot.
Also, we now set the sensors as healthy as soon as the ekf is healthy,
and don't wait 10 seconds without actually checking.
The user-defined literals for milli- and microseconds
should have argument names matching their units. The
current argument names 'seconds' is probably an oversight.
Refering to the refernece manual:
Tx queue operation is configured by programming FDCAN_TXBC.TFQM to 1. Messages
stored in the Tx queue are transmitted starting with the message with the lowest message
ID (highest priority). **In case that multiple queue buffers are configured with the same
message ID, the queue buffer with the lowest buffer number is transmitted first**
Tx FIFO operation is configured by programming FDCAN_TXBC.TFQM to 0. Messages
stored in the Tx FIFO are transmitted starting with the message referenced by the get index
FDCAN_TXFQS.TFGI. After each transmission the get index is incremented cyclically until
the Tx FIFO is empty. The Tx FIFO enables transmission of messages with the same
message ID from different Tx buffers in the order these messages have been written to the
Tx FIFO
The issue will be cancelation:
The FDCAN supports transmit cancellation. To cancel a requested transmission from a
dedicated Tx buffer or a Tx queue buffer the Host has to write a 1 to the corresponding bit
position (= number of Tx buffer) of register FDCAN_TXBCR. Transmit cancellation is not
intended for Tx FIFO operation.
But there is nothing preventing it. This seems to indicate it will
work. When a transmission request for the Tx buffer referenced by the get index is canceled, the
get index is incremented to the next Tx buffer with pending transmission request and the Tx
FIFO free level is recalculated. When transmission cancellation is applied to any other Tx
buffer, the get index and the FIFO free level remain unchanged.
PX4 uses banks of 8 outputs as a logical structure. Boards that have
more outputs than 8 get multiple instances. This is an arbitrary choice
that helps with overall structure and enables the mixing of different
device classes (like FMU, IO or UAVCAN).
Without reverting this a constant boot loop occurs.
Prior to merging, why this occurs on some F7 boards and not this one should be looked at.
With LazyFPU enabled, v1.12.0 beta1 will not boot but without it removed it works fine.
- fully respect datasheet quality and shutter metrics for mode changes
- use MOTION pin for scheduling if available
- log light mode
- refactor common enable LED code
- respect read and write time delays
Send battery status (ghst_telemetry). Apply factors to show correct values of volts, amps and mAh. Change ghost protocol code to follow more MISRA C++ guidelines.
- adds new ulog message & compatibility flag
- separately add airframe and system-wide defaults
- log only non-volatile defaults that are different from the current value
- additional size is ~3KB for 100 params
This was an idea to be able to reinitialize on mode change e.g. from
Holde mode to Land mode which are currently all still handled by
FlightTaskAuto and don't require a task switch.
But I found out it leads to issues because the last setpoint and the
ekf reset counter state from the previous task are lost and as a result
the setpoint transition cannot be handled consistently anymore.
Stall speed check would otherwise trigger during landing if airspeed falls below
stall speed before landing is detected.
Signed-off-by: Silvan Fuhrer <silvan@auterion.com>
subsscription for services responses and request and helps the usage of fixed
port subscribers Furthermore move register autconfigure logic from Uavcan.cpp
to NodeManager
* msg: Add estinator information and warning events message (estimator_event_flags)
* ekf2: publish information and warning events
* logger: log estimator_event_flags
* update ecl submodule to latest
Co-authored-by: Daniel Agar <daniel@agar.ca>
This commit adds support for specifying the spawn location of vehicles
in the Gazebo multi-vehicle simulator script (frame:number:x:y).
Behavior when x and y are not specified remains the same as before.
that prevents the vehicle from crashing with invalid setpoints or
states.
This broke with #16869 when the scheduling of the position control module
and the setpoint generation got independent. The failsafe mechanism assumed
the setpoint is overwirtten by the possibly infeasible input on every loop
iteration which is not the case anymore. As a result the failsafe reset its
histeresis based on the failsafe setpoint from the last loop iteration.
Keeping the failsafe_setpoint separate solves this issue. Note that
these setpoints to the bare minimum to keep the vehicle safely in the air
and do not suffer from sideffects ignoring the EKF reset.
If you're flying in manual position control mode and lose position the state machine will put you in altitude control mode. Extending the reliant on optical flow relaxed position validity thresholds allows you to potential get back into position control mode with flow alone.
- handle SET_POSITION_TARGET_LOCAL_NED and SET_POSITION_TARGET_GLOBAL_INT with ORB_ID(trajectory_setpoint)
- FlightTaskOffboard not needed at all
- bypass position_setpoint_triplet entirely (start removing extraneous fields)
- simplify offboard_control_mode to map to supported control modes
Adds support for using the MAVLink command MAV_CMD_DO_SET_ACTUATOR to
update the actuator values on control group 3 aux{1, 2, 3}. A simple
deconfliction with rc_update is implemented: when a MAVLink command is
sent, RC is disabled for that channel until a major stick movement is
detected.
- in multi-EKF mode the EKF selector becomes repsonsible for sensor
selector rather than the sensors module
- this updates the sensors module to still make the initial primary IMU
selection on startup before the EKF selector (including if the
estimators never fully initialize)
Also add commented-out code for use with PR-16808
(MixingOutput + output_control)
Bench-tested PWM output on a Pixracer via UAVCANv1 ESC commands from a
Pixhawk 4.
Now running into issues with running out of stack frame memory
For now I'm going to leave the relevant code in so it's at least
readable, but in its current state it will not compile
nxp_ucans32k146:Relocation for Bootloader
nxp_ucans32k146:can_boot enable CAN
nxp_ucans32k146:Save Space use Non Optimize memcpy
nxp_ucans32k146:Increase to 24K
nxp/ucans32k146:Canbootloader LED Driver
nxp_ucans32k146:Can bootloader shut down CAN
nxp_ucans32k146:Use NVMEEPROM for Paramaters
nxp_ucans32k146:Use bootloader AppDescriptor
px4 mtd:Support onchip emulated eeprom
nxp/s32k14x:board_identity: Return length of mfguid
nxp/s32k14x:CAN driver
nxp/s32k14x:Drver Added ABORT on error
canbootloader:Use N words for first word
canbootloader:Ensure the up_progmem API always defined
The drag is based on max_acc/max_vel, which means that increasing the
maximum velocity leads to slower braking (at the same starting speed).
Especially a combination of small max_acc (slow responsiveness) with high
max_vel led to an exceedingly high braking distance.
This improves that while still being smooth.
Previous horizontal position noise was a white Gaussian noise with std=0.8m
It results in a noise with high frequencies too high making some ekf
position tests fail (test ratio to allow arming).
The new noise values are below real GPS errors but as theses errors are
generally low frequency, so they cannot be modeled with a white noise.
These changes remove the two code paths to updates (forceupdate and update) and try to reboot and bootload IO independent of its state, wether it is in bootloader mode already, safety switch is off or if it is in "nominal state" (running and safety on). This ensures that there are no conditions where user error or boot sequence can prevent a successful upgrade. The only state where an upgrade will not be done is if the system is fully armed.
- publish wind estimate only from EKF, and wind speeds from airspeed selector to new separate topic (airspeed_wind)
- rename message wind_estimate to wind
- publish wind from currently used ekf instance (ekf2selector)
Signed-off-by: Silvan Fuhrer <silvan@auterion.com>
It was for example possible that DSM got parsed, and in the next iteration
SBUS got parsed, leading to multiple PX4IO_P_STATUS_FLAGS_RC_ flags set.
input_rc::input_source was then incorrectly set to DSM.
Partially guarding was already done: if SBUS got parsed, DSM and others
were skipped.
The IO will still clear all PX4IO_P_STATUS_FLAGS_RC_* flags on RC loss.
batt_smbus for BQ40Z80 transfers up to 34 bytes (32 byte block + 2 byte
address), but this was overflowing and failing the PEC check.
So increase the buffer size
Signed-off-by: Alex Mikhalev <alex@corvus-robotics.com>
Supporting direct down loads from ROMFS with preferece give to the
files fould on the SD card first. This will allow a user to provide
an updated uavcan firware on the SD card, and there is no overhead
of coping files from the ROM FS to the SD card.
Previously, we did not set a remote port which meant that the default
remote port 14550 was used. This meant that the mavlink instance
talking to the gimbal was interfering with the connection to the ground
station (on 14550).
We use the stabilize param to set the input. Like this the input flags
can be changed using the configure message later, and then eventually
used in the output.
This includes several changes to fix POI when used with MAVLink gimbal
v2 input:
- Correctly set capability flag that POI is supported.
- Keep lat/lon and calculate attitude on each cycle, instead of only
once on init.
- Always publish gimbal manager information, with or withoug gimbal v2
device.
We should be using gimbal_manager_information and not
gimbal_device_information. Plus, this updates the fields and flags
according to the MAVLink changes.
This should fix the case where AUX gimbals don't work anymore when
gimbal input is mavlink gimbal v2.
The fix is mostly to take care against NAN inputs.
This is a hotfix to restore gimbal functionality for SITL set-ups that
are set to MNT_MODE_IN 4 (gimbal protocol v2) but still need to accept
gimbal v1 commands that might be part of a mission, e.g. uploaded by
MAVSDK.
This is a hack to make sure the messages from the gimbal arrive at other
links (e.g. the ground station). It means that the gimbal does not get
flooded with all other messages that would get forwarded but messages
from the gimbal will still make it through.
- add command to request a message
- add gimbal attitude message
mavlink_receiver handle GIMBAL_MANAGER_SET_ATTITUDE
first implementation of new vmount input MavlinkGimbalV2
- setup class
- decode gimbal_manager_set_attitude in ControlData
add gimbal information message
add gimbal manager information and vehicle command ack
mavlink messages: add stream for GIMBAL_MANAGER_INFORMATION
mavlink_receiver: handle GIMBAL_DEVICE_INFORMATION
remove mavlink cmd handling from vmount input MavlinkGimbalV2
complete gimbal manager:
- send out fake gimbal_device_information for dummy gimbals
- complete ROI handling with nudging
small fixes
fix typos
cleanup
- gimbal device information
- flags lock
- check sanity of string
add support for CMD_DO_GIMBAL_MANAGER_ATTITUDE
stream GimbalDeviceAttitudeStatus for dummy gimbals
- add uROB gimbal_attitude_status
- fill status in vmount output_rc for dummy gimbals not able to send the
status themselves
- stream mavlink GimbalDeviceAttitudeStatus
better handle the request for gimbal infomation request
clean up
bring gimbal information back on vmount init
add new gimbal message to mavlink normal stream
fix publication of gimbal device information
rename gimbal_attitude_status to gimbal_device_attitude_status
stream gimbal_manager_status at 5Hz
mavlink: send information only on request
Sending the information message once on request should now work and we
don't need to keep publishing it.
mavlink: debug output for now
make sure to copy over control data
mavlink: add missing copyright header, pragma once
mavlink: address review comments
mavlink: handle stream not updated
Our answer does not just depend on whether the stream was found but
whether we actually were able to send out an update.
mavlink: remove outdated comment
vmount: add option for yaw stabilization only
The stabilize flag is used for gimbals which do not have an internal IMU
and need the autopilot's attitude in order to do stabilization. These
gimbals are probably quite rare by now but it makes sense to keep the
functionality given it can e.g. be used by simple servo gimbals for
sensors other than highres cameras.
The stabilize flag can also be re-used for gimbals which are capable of
stabilizing pitch and roll but not absolute yaw (e.g. locked to North).
For such gimbals we can now set the param MNT_DO_STAB to 2.
We still support configuring which axes are stabilized by the
MAVLink command DO_MOUNT_CONFIGURE, however, this is generally not
recommended anymore.
vmount: fix incorrect check for bit flag
mavlink_messages: remove debug message
Signed-off-by: Claudio Micheli <claudio@auterion.com>
use device id
remove debug print
gimbal attitude fix mistake
clang tidy fix
split:
- gimbal_attitude -> gimbal_device_set_attitude, gimbal_manager_set_attitude
- gimbal_information -> gimbal_device_informatio, gimbal_manager_information
add gimbal protocol messages to rtps msg ids
support set attitude for gimbal directly speaking mavlink
clean up gimbal urob messages
vmount: address a few small review comments
vmount: split output into v1 and v2 protocol
This way we can continue to support the MAVLink v1 protocol. Also, we
don't send the old vehicle commands when actually using the new v2
protocol.
vmount: config via ctor instead of duplicate param
vmount: use loop to poll all topics
Otherwise we might give up too soon and miss some data, or run too fast
based on commands that have nothing to do with the gimbal.
typhoon_h480: use gimbal v2 protocol, use yaw stab
Let's by default use the v2 protocol with typhoon_h480 and enable yaw
lock mode by stabilizing yaw.
- ecl in PX4/Firmware (a5a1d4caa0d04cb79ba29e98ba0af04e20c53de9): d4258cc66d
- ecl current upstream: 310f415175
- Changes: d4258cc66d...310f415175
310f415 2021-02-16 Daniel Agar - EKF add const state reset status access
0c5291d 2021-02-16 isidroas - Heading reset to magnetometer from GPS or EV (#969)
- new heater_status logging message
- run continously at low rate until configured sensor is found
- fix px4io fd bugs (fd open/close/ioctl must be same thread)
- new IMU driver structure with state machine (no sleeps in bus thread)
- verify all configured registers and trigger reset on failure
- detect if DIO1 or DIO2 are actually connected for data ready interrupt usage
- don't use CRC-16 on burst transfers except for verified lots
* Commit for the Integration of a position controller for the a Underwater vehicle.
This module is an extension of the uuv_att_control to control an Underwater vehicle to any position, given by the SET_POSITION_TARGET_LOCAL_NED which includes x y z yaw.
Since the position control is designed for a 6DOF Robot, the roll and pitch angle are controlled to be 0.
Additionally there is a stabilization control, which holds the robot at a defined depth, and not move in any direction.
In general the idea is to have this position module to control the position of the uuv. The position module reseives the desired position of the uuv and sends appropriate attitude setpoints to the uuv_attitude_control module.
Additionally the mixer file is adapted, to include the 6 different inputs(x y z roll pitch yaw).
* Commit for the Integration of a position controller for the a Underwater vehicle.
This module is an extension of the uuv_att_control to control an Underwater vehicle to any position, given by the SET_POSITION_TARGET_LOCAL_NED which includes x y z yaw.
Since the position control is designed for a 6DOF Robot, the roll and pitch angle are controlled to be 0.
Additionally there is a stabilization control, which holds the robot at a defined depth, and not move in any direction.
In general the idea is to have this position module to control the position of the uuv. The position module receives the desired position of the uuv and sends appropriate attitude setpoints to the uuv_attitude_control module.
Additionally the mixer file is adapted, to include the 6 different inputs(x y z roll pitch yaw).
Currently not solved/missing:
- Problem with gazebo model(propeller moving chaotically).
- Mixer correct gazebo vs real life (has to be tested in the future)
- correct integration in uuv.apps (when choose which module)
- very basic controller chosen (could be improved a lot in the future)
* Remove error caused by unused variables and a different build error
* added better description of the parameter. Additionally the group is changed.
* added better description of the parameter. Additionally the group is changed.
Fixed bug about parameter
* Added EOF to the files.
* Removed parameter for direct position control for safety reasons.
* small bugfix
- keep `vehicle_control_mode` last state in commander and use appropriate flags in place of various main_state and nav_state checks
- consolidate scattered arming requirements in `arm_disarm()`
- there were a number of different requirements from arming via RC vs Mavlink that don't make any sense
- if geofence enabled require valid home before arming
- throttle requirements for manual modes
- remove unnecessary mavlink feedback that differs between arming interfaces (mavlink vs RC)
- let the preflight/prearm checks respond directly in most cases
Co-authored-by: Matthias Grob <maetugr@gmail.com>
It is more intuitive to use the roll stick as lateral control input given that drones defined this category, plus this is how consumer car / rover radio controls have been working already.
This commit moves the steering output from yaw to the roll channel to better reflect the lateral control input / reaction mapping. It also removes old unused parameters and modernizes the mainloop to remove unnecessary polling.
90% of all real-world vehicle configs default to this and it is something that users stumble over if they configure a new system. There are valid cases where this would not be desired - for these it can be still switched off.
This repository holds the [PX4](http://px4.io) flight control solution for drones, with the main applications located in the [src/modules](https://github.com/PX4/PX4-Autopilot/tree/master/src/modules) directory. It also contains the PX4 Drone Middleware Platform, which provides drivers and middleware to run drones.
PX4 is highly portable, OS-independent and supports Linux, NuttX and QuRT out of the box.
* Official Website: http://px4.io (License: BSD 3-clause, [LICENSE](https://github.com/PX4/PX4-Autopilot/blob/master/LICENSE))
## Building a PX4 based drone, rover, boat or robot
The [PX4 User Guide](https://docs.px4.io/master/en/) explains how to assemble [supported vehicles](https://docs.px4.io/master/en/airframes/airframe_reference.html) and fly drones with PX4.
See the [forum and chat](https://docs.px4.io/master/en/#support) if you need help!
## PX4 Developers
## Changing code and contributing
This [Developer Guide](https://dev.px4.io/) is for software developers who want to modify the flight stack and middleware (e.g. to add new flight modes), hardware integrators who want to support new flight controller boards and peripherals, and anyone who wants to get PX4 working on a new (unsupported) airframe/vehicle.
This [Developer Guide](https://docs.px4.io/master/en/development/development.html) is for software developers who want to modify the flight stack and middleware (e.g. to add new flight modes), hardware integrators who want to support new flight controller boards and peripherals, and anyone who wants to get PX4 working on a new (unsupported) airframe/vehicle.
Developers should read the [Guide for Contributions](https://dev.px4.io/master/en/contribute/).
Developers should read the [Guide for Contributions](https://docs.px4.io/master/en/contribute/).
See the [forum and chat](https://dev.px4.io/master/en/#support) if you need help!
@ -69,10 +73,8 @@ The PX4 Dev Team syncs up on a [weekly dev call](https://dev.px4.io/master/en/co
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