Repurposed external gyro and made it multi-funcitonal.
required PWM on Ch8 to start the motor in RSC Mode moved up from 100 to 400. This is to facilitate two-stage switching of the motors with PWM>100 starting the tail motor, and PWM>400 starting the main motor.
Additional amendments by Randy
This fixes a bug uncovered by MHA in which the receiver output 900 pwm
for roll and pitch to the APM which was interpreted as requesting an 80
deg lean angle which the copter then attempted to do!
Always set the target altitude after take-off to be current altitude +
20cm. This resolves a bug in which the target altitude could end up
being a couple of meters higher than the current altitude if the user
entered Loiter / Alt Hold mode before inertial nav altitude estimate had
settled.
Developers can add a line like to APM_Config.h to reduce the initial
jump when taking off in Loiter or AltHold flightmodes:
#define ALT_HOLD_TAKEOFF_JUMP 0
Separate correction speeds for pilot input vs altitude-above-ground
errors to allow slower correction to sonar signals.
Change SONAR_GAIN parameter to be altitude error -> desired speed. This
means it should be set 10x larger than before.
Replace hard-coded sonar cut-off percentage of 70% with
SONAR_RELIABLE_DISTANCE_PCT.
Reduce sonar cut-off percentage to 60%.
Add desired sonar altitude to dataflash log's CTUN message.
Fix received from David Dewey
Was incorrectly using the direction instead of heading when deciding
whether to point forward or not. Reduced YAW_LOOK_AHEAD_MIN_SPEED to
1m/s because bug meant it was nearly always pointing forward and 10m/s
(the old value) seemed too high
The motors_runup_complete must be a feature that Rob has implemented in
his clone which has not yet reached master. We will need to restore
these lost few trad-heli specific lines once Rob's changes make it to
master.
Randy Mackay
Robert Lefebvre
Leonard Hall
Andrew Tridgell