Case: A vehicle is already operating but has no stick input or another
source than RC. When RC stick input is switched to either because it gets
first time available or as a fallback to joystick then the mode was
immediately changed to the switch position. This can lead to loss of
control e.g. when the vehicle is flying far away and the
mode switch of the RC is in some fully manual piloted mode.
I added tests to cover the cases where RC mode initialization is expected
and also unexpceted because the vehicle is already armed.
modules__ instead of module__ prefix
The module depends on the hysteresis library and probably because
it compiles with the still prevalent global includes the dependency
is not declared.
also for the other linux target builds. It's a follow up to
e5503480e3
I wasn't aware that there are multiple different
container versions used for almost the same build.
Channel values stay over one unit test but some tests assumed they are
reset each time. Reset the channel after these mode button tests.
Parameters survive between unit tests presumably as long as
the bianry runs. Reset them if a test requires that.
This allows PWM and all other output methods to configure
stopped, idling and full thrust points and use them consistently.
The fact that a fixed wing motor can be stopped when zero thrust
is demanded is explicit and could in principle even be disabled.
The mechanism is the same as for a standard VTOL stopping the
multicopter motors in the fixed wing flight phase.
This allows to consistently define:
Motor stopped - disarmed PWM
Motor idling - minimum PWM
Motor at full thrust - maximum PWM
Any allocation can then distinctly decide if
a motor should be running or not depending
on the context and also explicitly command that.
COM_ARMABLE is set to "Disabled" will prevent arming.
This allows to set the parameter when ground demoing a drone or
if it's in maintenance for safety reasons.
const char *data = "www\r\n";
Defines a cstring of 6 bytes: 'w', 'w', 'w', '\r', '\n', '\0'
type of data: char const*
type of &data: char const**
So when we call
write(_fd, &data, strlen(data));
then strlen(data) == 5
and we send the 4 byte memory address of data
+ some additional random byte.
Correct is
write(_fd, data, strlen(data));
where char const* gets casted to const void * and we pass
the pointer to the content of data.
The fundamental problem here is write() not being typesafe.
Before this the ESC calibration aborts if battery detection doesn't work.
The problem is if the user still connects the battery as he gets instructed
and the calibration aborts then the ESCs are in calibration mode and
after abortion calibrate to the wrong value.
Also I realized there's no additional safety by aborting the calibration
if the battery cannot be detected during the timeout because a pixhawk
board without power module will report a battery status from the
ADC driverand in it that no battery is connected which is the best
it can do. In this situation the motors will still spin if the
ESCs are powered.
Some ESCs e.g. Gaui enter the menu relatively quickly if the
signal is high for too long. To solve that it's kept high shorter.
Also all tested ESCs detect the low signal within a shorter time
so no need to wait longer.
- Change timings for a more reliable calibration.
- Make sure there's an error message when battery measurement is not
available also when it gets disabled after system boot in the power
just above the calibration button.
- Safety check if measured electrical current goes up after issuing the
high calibration value for the case the user did not unplug power
and the detection either fails or is not enforced.
Before:
When the mixed throttle for the motor was exactly zero the ramp went
from the disarmed PWM value to the minimum PWM value.
When the throttle was even just slightly different from zero the ramp
made a jump up to the commanded throttle scaled between
disarmed PWM and maximum PWM, then ramped between
disarmed PWM and minimum PWM and at the end jumped up again to
the commanded throttle scaled between minimum PWM and maximum PWM.
After:
The ramp goes from disarmed PWM value to the the
commanded throttle scaled between minimum PWM and maximum PWM.
If the commanded throttle changes during the ramp then the scale and
hence also end value of the ramp changes.
The entire logic did not work for the case when the throttle channel is
reversed because then QGC sets trim = max for that channel and
the result is only half the throttle range.
with the goal to make it more clear and the error only appear when
armed but every time the running task doesn't actually match
the mapping inside the start_flight_task() function.
to enable proper automatic output in gtest unit tests
that compare two `Matrix`, `Vector` or two `Dual` objects.
Credits to @jwidauer for showing me this trick.
- Switching to the first order filter that was previously
only in FlightTaskManualAltitude.
- Moving the scaling of full stick deflection to
radians per second into the class.
This is fully backwards compatible: If the throttle trim is set to
the minimum then it's the legacy calibration and gets
interpreted such that there is no trim and behavior remains as before.
If the trim is set to a different value than the minimum then it gets
used like with all other channels which was unsupported before.
In review it was requested to have a different name for
manual_control_setpoint.z because of the adjusted range.
I started to investigate what naming is most intuitive and found
that most people recognize the stick axes as roll, pitch, yaw, throttle.
It comes at no surprise because other autopilots
and APIs seem to share this convention.
While changing the code I realized that even within the code base
the axes are usually assigned to a variable with that name or
have comments next to the assignment clarifying the axes
using these names.
To be consistent with all other axes of stick input and avoid future
rescaling confusion.
Note: for the MAVLink message 69 MANUAL_CONTROL it's using the full range
according to the message specs now [-1000,1000].
Matthias Grob