mirror of https://github.com/ArduPilot/ardupilot
892 lines
33 KiB
C++
892 lines
33 KiB
C++
/*
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <AP_HAL/AP_HAL.h>
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#include <AP_Math/AP_Math.h>
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#include "SRV_Channel/SRV_Channel.h"
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#include "AP_MotorsUGV.h"
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#include "Rover.h"
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extern const AP_HAL::HAL& hal;
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// parameters for the motor class
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const AP_Param::GroupInfo AP_MotorsUGV::var_info[] = {
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// @Param: PWM_TYPE
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// @DisplayName: Motor Output PWM type
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// @Description: This selects the output PWM type as regular PWM, OneShot, Brushed motor support using PWM (duty cycle) with separated direction signal, Brushed motor support with separate throttle and direction PWM (duty cyle)
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// @Values: 0:Normal,1:OneShot,2:OneShot125,3:BrushedWithRelay,4:BrushedBiPolar,5:DShot150,6:DShot300,7:DShot600,8:DShot1200
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// @User: Advanced
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// @RebootRequired: True
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AP_GROUPINFO("PWM_TYPE", 1, AP_MotorsUGV, _pwm_type, PWM_TYPE_NORMAL),
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// @Param: PWM_FREQ
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// @DisplayName: Motor Output PWM freq for brushed motors
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// @Description: Motor Output PWM freq for brushed motors
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// @Units: kHz
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// @Range: 1 20
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// @Increment: 1
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// @User: Advanced
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// @RebootRequired: True
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AP_GROUPINFO("PWM_FREQ", 2, AP_MotorsUGV, _pwm_freq, 16),
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// @Param: SAFE_DISARM
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// @DisplayName: Motor PWM output disabled when disarmed
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// @Description: Disables motor PWM output when disarmed
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// @Values: 0:PWM enabled while disarmed, 1:PWM disabled while disarmed
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// @User: Advanced
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AP_GROUPINFO("SAFE_DISARM", 3, AP_MotorsUGV, _disarm_disable_pwm, 0),
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// @Param: THR_MIN
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// @DisplayName: Throttle minimum
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// @Description: Throttle minimum percentage the autopilot will apply. This is useful for handling a deadzone around low throttle and for preventing internal combustion motors cutting out during missions.
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// @Units: %
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// @Range: 0 20
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// @Increment: 1
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// @User: Standard
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AP_GROUPINFO("THR_MIN", 5, AP_MotorsUGV, _throttle_min, 0),
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// @Param: THR_MAX
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// @DisplayName: Throttle maximum
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// @Description: Throttle maximum percentage the autopilot will apply. This can be used to prevent overheating an ESC or motor on an electric rover
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// @Units: %
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// @Range: 30 100
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// @Increment: 1
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// @User: Standard
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AP_GROUPINFO("THR_MAX", 6, AP_MotorsUGV, _throttle_max, 100),
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// @Param: SLEWRATE
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// @DisplayName: Throttle slew rate
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// @Description: Throttle slew rate as a percentage of total range per second. A value of 100 allows the motor to change over its full range in one second. A value of zero disables the limit. Note some NiMH powered rovers require a lower setting of 40 to reduce current demand to avoid brownouts.
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// @Units: %/s
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// @Range: 0 1000
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// @Increment: 1
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// @User: Standard
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AP_GROUPINFO("SLEWRATE", 8, AP_MotorsUGV, _slew_rate, 100),
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// @Param: THST_EXPO
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// @DisplayName: Thrust Curve Expo
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// @Description: Thrust curve exponent (-1 to +1 with 0 being linear)
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// @Range: -1.0 1.0
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// @User: Advanced
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AP_GROUPINFO("THST_EXPO", 9, AP_MotorsUGV, _thrust_curve_expo, 0.0f),
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// @Param: VEC_THR_BASE
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// @DisplayName: Vector thrust throttle base
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// @Description: Throttle level above which steering is scaled down when using vector thrust. zero to disable vectored thrust
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// @Units: %
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// @Range: 0 100
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// @User: Advanced
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AP_GROUPINFO("VEC_THR_BASE", 10, AP_MotorsUGV, _vector_throttle_base, 0.0f),
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// @Param: SPD_SCA_BASE
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// @DisplayName: Motor speed scaling base speed
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// @Description: Speed above which steering is scaled down when using regular steering/throttle vehicles. zero to disable speed scaling
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// @Units: m/s
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// @Range: 0 10
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// @User: Advanced
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AP_GROUPINFO("SPD_SCA_BASE", 11, AP_MotorsUGV, _speed_scale_base, 1.0f),
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AP_GROUPEND
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};
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AP_MotorsUGV::AP_MotorsUGV(AP_ServoRelayEvents &relayEvents) :
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_relayEvents(relayEvents)
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{
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AP_Param::setup_object_defaults(this, var_info);
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}
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void AP_MotorsUGV::init()
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{
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// setup servo output
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setup_servo_output();
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// setup pwm type
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setup_pwm_type();
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// set safety output
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setup_safety_output();
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// setup for omni vehicles
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if (rover.get_frame_type() != FRAME_TYPE_UNDEFINED) {
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setup_omni();
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}
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}
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// setup output in case of main CPU failure
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void AP_MotorsUGV::setup_safety_output()
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{
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if (_pwm_type == PWM_TYPE_BRUSHED_WITH_RELAY) {
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// set trim to min to set duty cycle range (0 - 100%) to servo range
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SRV_Channels::set_trim_to_min_for(SRV_Channel::k_throttle);
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SRV_Channels::set_trim_to_min_for(SRV_Channel::k_throttleLeft);
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SRV_Channels::set_trim_to_min_for(SRV_Channel::k_throttleRight);
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}
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if (_disarm_disable_pwm) {
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// throttle channels output zero pwm (i.e. no signal)
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SRV_Channels::set_safety_limit(SRV_Channel::k_throttle, SRV_Channel::Limit::ZERO_PWM);
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SRV_Channels::set_safety_limit(SRV_Channel::k_throttleLeft, SRV_Channel::Limit::ZERO_PWM);
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SRV_Channels::set_safety_limit(SRV_Channel::k_throttleRight, SRV_Channel::Limit::ZERO_PWM);
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} else {
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// throttle channels output trim values (because rovers will go backwards if set to MIN)
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SRV_Channels::set_safety_limit(SRV_Channel::k_throttle, SRV_Channel::Limit::TRIM);
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SRV_Channels::set_safety_limit(SRV_Channel::k_throttleLeft, SRV_Channel::Limit::TRIM);
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SRV_Channels::set_safety_limit(SRV_Channel::k_throttleRight, SRV_Channel::Limit::TRIM);
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}
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// stop sending pwm if main CPU fails
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SRV_Channels::set_failsafe_limit(SRV_Channel::k_throttle, SRV_Channel::Limit::ZERO_PWM);
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SRV_Channels::set_failsafe_limit(SRV_Channel::k_throttleLeft, SRV_Channel::Limit::ZERO_PWM);
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SRV_Channels::set_failsafe_limit(SRV_Channel::k_throttleRight, SRV_Channel::Limit::ZERO_PWM);
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}
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// setup servo output ranges
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void AP_MotorsUGV::setup_servo_output()
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{
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// k_steering are limited to -45;45 degree
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SRV_Channels::set_angle(SRV_Channel::k_steering, SERVO_MAX);
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// k_throttle are in power percent so -100 ... 100
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SRV_Channels::set_angle(SRV_Channel::k_throttle, 100);
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// skid steering left/right throttle as -1000 to 1000 values
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SRV_Channels::set_angle(SRV_Channel::k_throttleLeft, 1000);
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SRV_Channels::set_angle(SRV_Channel::k_throttleRight, 1000);
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// omni motors set in power percent so -100 ... 100
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for (uint8_t i=0; i<AP_MOTORS_NUM_MOTORS_MAX; i++) {
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SRV_Channel::Aux_servo_function_t function = SRV_Channels::get_motor_function(i);
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SRV_Channels::set_angle(function, 100);
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}
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// mainsail range from 0 to 100
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SRV_Channels::set_range(SRV_Channel::k_mainsail_sheet, 100);
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}
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// set steering as a value from -4500 to +4500
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// apply_scaling should be set to false for manual modes where
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// no scaling by speed or angle should be performed
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void AP_MotorsUGV::set_steering(float steering, bool apply_scaling)
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{
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_steering = steering;
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_scale_steering = apply_scaling;
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}
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// set throttle as a value from -100 to 100
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void AP_MotorsUGV::set_throttle(float throttle)
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{
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// only allow setting throttle if armed
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if (!hal.util->get_soft_armed()) {
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return;
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}
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// check throttle is between -_throttle_max and +_throttle_max
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_throttle = constrain_float(throttle, -_throttle_max, _throttle_max);
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}
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// set lateral input as a value from -100 to +100
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void AP_MotorsUGV::set_lateral(float lateral)
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{
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_lateral = constrain_float(lateral, -100.0f, 100.0f);
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}
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// set mainsail input as a value from 0 to 100
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void AP_MotorsUGV::set_mainsail(float mainsail)
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{
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_mainsail = constrain_float(mainsail, 0.0f, 100.0f);
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}
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// get slew limited throttle
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// used by manual mode to avoid bad steering behaviour during transitions from forward to reverse
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// same as private slew_limit_throttle method (see below) but does not update throttle state
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float AP_MotorsUGV::get_slew_limited_throttle(float throttle, float dt) const
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{
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if (_slew_rate <= 0) {
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return throttle;
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}
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const float throttle_change_max = MAX(1.0f, (float)_slew_rate * dt);
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return constrain_float(throttle, _throttle_prev - throttle_change_max, _throttle_prev + throttle_change_max);
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}
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/*
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work out if skid steering is available
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*/
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bool AP_MotorsUGV::have_skid_steering() const
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{
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if (SRV_Channels::function_assigned(SRV_Channel::k_throttleLeft) &&
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SRV_Channels::function_assigned(SRV_Channel::k_throttleRight)) {
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return true;
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}
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return false;
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}
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// true if the vehicle has a mainsail
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bool AP_MotorsUGV::has_sail() const
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{
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return SRV_Channels::function_assigned(SRV_Channel::k_mainsail_sheet);
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}
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void AP_MotorsUGV::output(bool armed, float ground_speed, float dt)
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{
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// soft-armed overrides passed in armed status
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if (!hal.util->get_soft_armed()) {
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armed = false;
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_throttle = 0.0f;
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}
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// sanity check parameters
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sanity_check_parameters();
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// slew limit throttle
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slew_limit_throttle(dt);
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// output for regular steering/throttle style frames
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output_regular(armed, ground_speed, _steering, _throttle);
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// output for skid steering style frames
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output_skid_steering(armed, _steering, _throttle, dt);
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// output for omni frames
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output_omni(armed, _steering, _throttle, _lateral);
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// output to mainsail
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output_mainsail();
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// send values to the PWM timers for output
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SRV_Channels::calc_pwm();
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SRV_Channels::cork();
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SRV_Channels::output_ch_all();
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SRV_Channels::push();
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}
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// test steering or throttle output as a percentage of the total (range -100 to +100)
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// used in response to DO_MOTOR_TEST mavlink command
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bool AP_MotorsUGV::output_test_pct(motor_test_order motor_seq, float pct)
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{
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// check if the motor_seq is valid
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if (motor_seq >= MOTOR_TEST_LAST) {
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return false;
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}
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pct = constrain_float(pct, -100.0f, 100.0f);
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switch (motor_seq) {
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case MOTOR_TEST_THROTTLE: {
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if (SRV_Channels::function_assigned(SRV_Channel::k_motor1)) {
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output_throttle(SRV_Channel::k_motor1, pct);
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}
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if (SRV_Channels::function_assigned(SRV_Channel::k_throttle)) {
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output_throttle(SRV_Channel::k_throttle, pct);
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}
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break;
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}
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case MOTOR_TEST_STEERING: {
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if (SRV_Channels::function_assigned(SRV_Channel::k_motor2)) {
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output_throttle(SRV_Channel::k_motor2, pct);
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}
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if (SRV_Channels::function_assigned(SRV_Channel::k_steering)) {
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SRV_Channels::set_output_scaled(SRV_Channel::k_steering, pct * 45.0f);
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}
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break;
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}
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case MOTOR_TEST_THROTTLE_LEFT: {
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if (SRV_Channels::function_assigned(SRV_Channel::k_motor3)) {
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output_throttle(SRV_Channel::k_motor3, pct);
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}
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if (SRV_Channels::function_assigned(SRV_Channel::k_throttleLeft)) {
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output_throttle(SRV_Channel::k_throttleLeft, pct);
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}
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break;
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}
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case MOTOR_TEST_THROTTLE_RIGHT: {
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if (SRV_Channels::function_assigned(SRV_Channel::k_motor4)) {
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output_throttle(SRV_Channel::k_motor4, pct);
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}
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if (SRV_Channels::function_assigned(SRV_Channel::k_throttleRight)) {
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output_throttle(SRV_Channel::k_throttleRight, pct);
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}
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break;
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}
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case MOTOR_TEST_MAINSAIL: {
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if (SRV_Channels::function_assigned(SRV_Channel::k_mainsail_sheet)) {
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SRV_Channels::set_output_scaled(SRV_Channel::k_mainsail_sheet, pct);
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}
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break;
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}
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case MOTOR_TEST_LAST:
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return false;
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}
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SRV_Channels::calc_pwm();
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SRV_Channels::cork();
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SRV_Channels::output_ch_all();
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SRV_Channels::push();
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return true;
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}
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// test steering or throttle output using a pwm value
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bool AP_MotorsUGV::output_test_pwm(motor_test_order motor_seq, float pwm)
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{
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// check if the motor_seq is valid
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if (motor_seq > MOTOR_TEST_THROTTLE_RIGHT) {
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return false;
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}
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switch (motor_seq) {
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case MOTOR_TEST_THROTTLE: {
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if (SRV_Channels::function_assigned(SRV_Channel::k_motor1)) {
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SRV_Channels::set_output_pwm(SRV_Channel::k_motor1, pwm);
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}
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if (SRV_Channels::function_assigned(SRV_Channel::k_throttle)) {
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SRV_Channels::set_output_pwm(SRV_Channel::k_throttle, pwm);
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}
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break;
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}
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case MOTOR_TEST_STEERING: {
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if (SRV_Channels::function_assigned(SRV_Channel::k_motor2)) {
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SRV_Channels::set_output_pwm(SRV_Channel::k_motor2, pwm);
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}
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if (SRV_Channels::function_assigned(SRV_Channel::k_steering)) {
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SRV_Channels::set_output_pwm(SRV_Channel::k_steering, pwm);
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}
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break;
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}
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case MOTOR_TEST_THROTTLE_LEFT: {
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if (SRV_Channels::function_assigned(SRV_Channel::k_motor3)) {
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SRV_Channels::set_output_pwm(SRV_Channel::k_motor3, pwm);
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}
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if (SRV_Channels::function_assigned(SRV_Channel::k_throttleLeft)) {
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SRV_Channels::set_output_pwm(SRV_Channel::k_throttleLeft, pwm);
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}
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break;
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}
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case MOTOR_TEST_THROTTLE_RIGHT: {
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if (SRV_Channels::function_assigned(SRV_Channel::k_motor4)) {
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SRV_Channels::set_output_pwm(SRV_Channel::k_motor4, pwm);
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}
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if (SRV_Channels::function_assigned(SRV_Channel::k_throttleRight)) {
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SRV_Channels::set_output_pwm(SRV_Channel::k_throttleRight, pwm);
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}
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break;
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}
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case MOTOR_TEST_MAINSAIL: {
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if (SRV_Channels::function_assigned(SRV_Channel::k_mainsail_sheet)) {
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SRV_Channels::set_output_pwm(SRV_Channel::k_mainsail_sheet, pwm);
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}
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break;
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}
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default:
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return false;
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}
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SRV_Channels::calc_pwm();
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SRV_Channels::cork();
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SRV_Channels::output_ch_all();
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SRV_Channels::push();
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return true;
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}
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// returns true if checks pass, false if they fail. report should be true to send text messages to GCS
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bool AP_MotorsUGV::pre_arm_check(bool report) const
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{
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// check if both regular and skid steering functions have been defined
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if (SRV_Channels::function_assigned(SRV_Channel::k_throttleLeft) &&
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SRV_Channels::function_assigned(SRV_Channel::k_throttleRight) &&
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SRV_Channels::function_assigned(SRV_Channel::k_throttle) &&
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SRV_Channels::function_assigned(SRV_Channel::k_steering)) {
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if (report) {
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gcs().send_text(MAV_SEVERITY_CRITICAL, "PreArm: regular AND skid steering configured");
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}
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return false;
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}
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// check if only one of skid-steering output has been configured
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if (SRV_Channels::function_assigned(SRV_Channel::k_throttleLeft) != SRV_Channels::function_assigned(SRV_Channel::k_throttleRight)) {
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if (report) {
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gcs().send_text(MAV_SEVERITY_CRITICAL, "PreArm: check skid steering config");
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}
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return false;
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}
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// check if only one of throttle or steering outputs has been configured, if has a sail allow no throttle
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if ((has_sail() || SRV_Channels::function_assigned(SRV_Channel::k_throttle)) != SRV_Channels::function_assigned(SRV_Channel::k_steering)) {
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if (report) {
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gcs().send_text(MAV_SEVERITY_CRITICAL, "PreArm: check steering and throttle config");
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}
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return false;
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}
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// check all omni motor outputs have been configured
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for (uint8_t i=0; i<_motors_num; i++)
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{
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SRV_Channel::Aux_servo_function_t function = SRV_Channels::get_motor_function(i);
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if (!SRV_Channels::function_assigned(function)) {
|
|
if (report) {
|
|
gcs().send_text(MAV_SEVERITY_CRITICAL, "PreArm: servo function %u unassigned", function);
|
|
}
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
// sanity check parameters
|
|
void AP_MotorsUGV::sanity_check_parameters()
|
|
{
|
|
_throttle_min = constrain_int16(_throttle_min, 0, 20);
|
|
_throttle_max = constrain_int16(_throttle_max, 30, 100);
|
|
_vector_throttle_base = constrain_float(_vector_throttle_base, 0.0f, 100.0f);
|
|
}
|
|
|
|
// setup pwm output type
|
|
void AP_MotorsUGV::setup_pwm_type()
|
|
{
|
|
uint16_t motor_mask = 0;
|
|
|
|
// work out mask of channels assigned to motors
|
|
motor_mask |= SRV_Channels::get_output_channel_mask(SRV_Channel::k_throttle);
|
|
motor_mask |= SRV_Channels::get_output_channel_mask(SRV_Channel::k_throttleLeft);
|
|
motor_mask |= SRV_Channels::get_output_channel_mask(SRV_Channel::k_throttleRight);
|
|
for (uint8_t i=0; i<_motors_num; i++) {
|
|
motor_mask |= SRV_Channels::get_output_channel_mask(SRV_Channels::get_motor_function(i));
|
|
}
|
|
|
|
switch (_pwm_type) {
|
|
case PWM_TYPE_ONESHOT:
|
|
hal.rcout->set_output_mode(motor_mask, AP_HAL::RCOutput::MODE_PWM_ONESHOT);
|
|
break;
|
|
case PWM_TYPE_ONESHOT125:
|
|
hal.rcout->set_output_mode(motor_mask, AP_HAL::RCOutput::MODE_PWM_ONESHOT125);
|
|
break;
|
|
case PWM_TYPE_BRUSHED_WITH_RELAY:
|
|
case PWM_TYPE_BRUSHED_BIPOLAR:
|
|
hal.rcout->set_output_mode(motor_mask, AP_HAL::RCOutput::MODE_PWM_BRUSHED);
|
|
hal.rcout->set_freq(motor_mask, uint16_t(_pwm_freq * 1000));
|
|
break;
|
|
case PWM_TYPE_DSHOT150:
|
|
hal.rcout->set_output_mode(motor_mask, AP_HAL::RCOutput::MODE_PWM_DSHOT150);
|
|
break;
|
|
case PWM_TYPE_DSHOT300:
|
|
hal.rcout->set_output_mode(motor_mask, AP_HAL::RCOutput::MODE_PWM_DSHOT300);
|
|
break;
|
|
case PWM_TYPE_DSHOT600:
|
|
hal.rcout->set_output_mode(motor_mask, AP_HAL::RCOutput::MODE_PWM_DSHOT600);
|
|
break;
|
|
case PWM_TYPE_DSHOT1200:
|
|
hal.rcout->set_output_mode(motor_mask, AP_HAL::RCOutput::MODE_PWM_DSHOT1200);
|
|
break;
|
|
default:
|
|
// do nothing
|
|
break;
|
|
}
|
|
}
|
|
|
|
// setup for frames with omni motors
|
|
void AP_MotorsUGV::setup_omni()
|
|
{
|
|
// remove existing motors
|
|
for (int8_t i=0; i<AP_MOTORS_NUM_MOTORS_MAX; i++) {
|
|
clear_omni_motors(i);
|
|
}
|
|
|
|
// hard coded factor configuration
|
|
switch (rover.get_frame_type()) {
|
|
|
|
// FRAME TYPE NAME
|
|
case FRAME_TYPE_UNDEFINED:
|
|
break;
|
|
|
|
case FRAME_TYPE_OMNI3:
|
|
_motors_num = 3;
|
|
add_omni_motor(0, 1.0f, -1.0f, -1.0f);
|
|
add_omni_motor(1, 0.0f, -1.0f, 1.0f);
|
|
add_omni_motor(2, 1.0f, 1.0f, 1.0f);
|
|
break;
|
|
|
|
case FRAME_TYPE_OMNIX:
|
|
_motors_num = 4,
|
|
add_omni_motor(0, 1.0f, -1.0f, -1.0f);
|
|
add_omni_motor(1, 1.0f, -1.0f, 1.0f);
|
|
add_omni_motor(2, 1.0f, 1.0f, -1.0f);
|
|
add_omni_motor(3, 1.0f, 1.0f, 1.0f);
|
|
break;
|
|
|
|
case FRAME_TYPE_OMNIPLUS:
|
|
_motors_num = 4;
|
|
add_omni_motor(0, 0.0f, 1.0f, 1.0f);
|
|
add_omni_motor(1, 1.0f, 0.0f, 0.0f);
|
|
add_omni_motor(2, 0.0f, -1.0f, 1.0f);
|
|
add_omni_motor(3, 1.0f, 0.0f, 0.0f);
|
|
break;
|
|
}
|
|
}
|
|
|
|
// add omni motor using separate throttle, steering and lateral factors
|
|
void AP_MotorsUGV::add_omni_motor(int8_t motor_num, float throttle_factor, float steering_factor, float lateral_factor)
|
|
{
|
|
// ensure valid motor number is provided
|
|
if (motor_num >= 0 && motor_num < AP_MOTORS_NUM_MOTORS_MAX) {
|
|
|
|
// set throttle, steering and lateral factors
|
|
_throttle_factor[motor_num] = throttle_factor;
|
|
_steering_factor[motor_num] = steering_factor;
|
|
_lateral_factor[motor_num] = lateral_factor;
|
|
|
|
add_omni_motor_num(motor_num);
|
|
}
|
|
}
|
|
|
|
// add an omni motor and set up default output function
|
|
void AP_MotorsUGV::add_omni_motor_num(int8_t motor_num)
|
|
{
|
|
// ensure a valid motor number is provided
|
|
if (motor_num >= 0 && motor_num < AP_MOTORS_NUM_MOTORS_MAX) {
|
|
uint8_t chan;
|
|
SRV_Channel::Aux_servo_function_t function = SRV_Channels::get_motor_function(motor_num);
|
|
SRV_Channels::set_aux_channel_default(function, motor_num);
|
|
if (!SRV_Channels::find_channel(function, chan)) {
|
|
gcs().send_text(MAV_SEVERITY_ERROR, "Motors: unable to setup motor %u", motor_num);
|
|
}
|
|
}
|
|
}
|
|
|
|
// disable omni motor and remove all throttle, steering and lateral factor for this motor
|
|
void AP_MotorsUGV::clear_omni_motors(int8_t motor_num)
|
|
{
|
|
// ensure valid motor number is provided
|
|
if (motor_num >= 0 && motor_num < AP_MOTORS_NUM_MOTORS_MAX) {
|
|
// disable the motor and set factors to zero
|
|
_throttle_factor[motor_num] = 0;
|
|
_steering_factor[motor_num] = 0;
|
|
_lateral_factor[motor_num] = 0;
|
|
}
|
|
}
|
|
|
|
// output to regular steering and throttle channels
|
|
void AP_MotorsUGV::output_regular(bool armed, float ground_speed, float steering, float throttle)
|
|
{
|
|
// output to throttle channels
|
|
if (armed) {
|
|
if (_scale_steering) {
|
|
// vectored thrust handling
|
|
if (have_vectored_thrust()) {
|
|
if (fabsf(throttle) > _vector_throttle_base) {
|
|
// scale steering down linearly as throttle increases above _vector_throttle_base
|
|
steering *= constrain_float(_vector_throttle_base / fabsf(throttle), 0.0f, 1.0f);
|
|
}
|
|
} else {
|
|
// scale steering down as speed increase above MOT_SPD_SCA_BASE (1 m/s default)
|
|
if (is_positive(_speed_scale_base) && (fabsf(ground_speed) > _speed_scale_base)) {
|
|
steering *= (_speed_scale_base / fabsf(ground_speed));
|
|
} else {
|
|
// regular steering rover at low speed so set limits to stop I-term build-up in controllers
|
|
if (!have_skid_steering()) {
|
|
limit.steer_left = true;
|
|
limit.steer_right = true;
|
|
}
|
|
}
|
|
// reverse steering direction when backing up
|
|
if (is_negative(ground_speed)) {
|
|
steering *= -1.0f;
|
|
}
|
|
}
|
|
} else {
|
|
// reverse steering direction when backing up
|
|
if (is_negative(throttle)) {
|
|
steering *= -1.0f;
|
|
}
|
|
}
|
|
output_throttle(SRV_Channel::k_throttle, throttle);
|
|
} else {
|
|
// handle disarmed case
|
|
if (_disarm_disable_pwm) {
|
|
SRV_Channels::set_output_limit(SRV_Channel::k_throttle, SRV_Channel::Limit::ZERO_PWM);
|
|
} else {
|
|
SRV_Channels::set_output_limit(SRV_Channel::k_throttle, SRV_Channel::Limit::TRIM);
|
|
}
|
|
}
|
|
|
|
// clear and set limits based on input
|
|
// we do this here because vectored thrust or speed scaling may have reduced steering request
|
|
set_limits_from_input(armed, steering, throttle);
|
|
|
|
// constrain steering
|
|
steering = constrain_float(steering, -4500.0f, 4500.0f);
|
|
|
|
// always allow steering to move
|
|
SRV_Channels::set_output_scaled(SRV_Channel::k_steering, steering);
|
|
}
|
|
|
|
// output to skid steering channels
|
|
void AP_MotorsUGV::output_skid_steering(bool armed, float steering, float throttle, float dt)
|
|
{
|
|
if (!have_skid_steering()) {
|
|
return;
|
|
}
|
|
|
|
// clear and set limits based on input
|
|
set_limits_from_input(armed, steering, throttle);
|
|
|
|
// constrain steering
|
|
steering = constrain_float(steering, -4500.0f, 4500.0f);
|
|
|
|
// handle simpler disarmed case
|
|
if (!armed) {
|
|
if (_disarm_disable_pwm) {
|
|
SRV_Channels::set_output_limit(SRV_Channel::k_throttleLeft, SRV_Channel::Limit::ZERO_PWM);
|
|
SRV_Channels::set_output_limit(SRV_Channel::k_throttleRight, SRV_Channel::Limit::ZERO_PWM);
|
|
} else {
|
|
SRV_Channels::set_output_limit(SRV_Channel::k_throttleLeft, SRV_Channel::Limit::TRIM);
|
|
SRV_Channels::set_output_limit(SRV_Channel::k_throttleRight, SRV_Channel::Limit::TRIM);
|
|
}
|
|
return;
|
|
}
|
|
|
|
// skid steering mixer
|
|
float steering_scaled = steering / 4500.0f; // steering scaled -1 to +1
|
|
float throttle_scaled = throttle / 100.0f; // throttle scaled -1 to +1
|
|
|
|
// apply constraints
|
|
steering_scaled = constrain_float(steering_scaled, -1.0f, 1.0f);
|
|
throttle_scaled = constrain_float(throttle_scaled, -1.0f, 1.0f);
|
|
|
|
// check for saturation and scale back throttle and steering proportionally
|
|
const float saturation_value = fabsf(steering_scaled) + fabsf(throttle_scaled);
|
|
if (saturation_value > 1.0f) {
|
|
steering_scaled = steering_scaled / saturation_value;
|
|
throttle_scaled = throttle_scaled / saturation_value;
|
|
}
|
|
|
|
// add in throttle and steering
|
|
const float motor_left = throttle_scaled + steering_scaled;
|
|
const float motor_right = throttle_scaled - steering_scaled;
|
|
|
|
// send pwm value to each motor
|
|
output_throttle(SRV_Channel::k_throttleLeft, 100.0f * motor_left, dt);
|
|
output_throttle(SRV_Channel::k_throttleRight, 100.0f * motor_right, dt);
|
|
}
|
|
|
|
// output for omni frames
|
|
void AP_MotorsUGV::output_omni(bool armed, float steering, float throttle, float lateral)
|
|
{
|
|
// exit immediately if the frame type is set to UNDEFINED
|
|
if (rover.get_frame_type() == FRAME_TYPE_UNDEFINED) {
|
|
return;
|
|
}
|
|
|
|
if (armed) {
|
|
// clear and set limits based on input
|
|
set_limits_from_input(armed, steering, throttle);
|
|
|
|
// constrain steering
|
|
steering = constrain_float(steering, -4500.0f, 4500.0f);
|
|
|
|
// scale throttle, steering and lateral inputs to -1 to 1
|
|
const float scaled_throttle = throttle / 100.0f;
|
|
const float scaled_steering = steering / 4500.0f;
|
|
const float scaled_lateral = lateral / 100.0f;
|
|
|
|
float thr_str_ltr_out;
|
|
float thr_str_ltr_max = 1;
|
|
for (uint8_t i=0; i<AP_MOTORS_NUM_MOTORS_MAX; i++) {
|
|
thr_str_ltr_out = (scaled_throttle * _throttle_factor[i]) +
|
|
(scaled_steering * _steering_factor[i]) +
|
|
(scaled_lateral * _lateral_factor[i]);
|
|
if (fabsf(thr_str_ltr_out) > thr_str_ltr_max) {
|
|
thr_str_ltr_max = fabsf(thr_str_ltr_out);
|
|
}
|
|
|
|
float output_vectored = (thr_str_ltr_out / thr_str_ltr_max);
|
|
|
|
// send output for each motor
|
|
output_throttle(SRV_Channels::get_motor_function(i), 100.0f * output_vectored);
|
|
}
|
|
} else {
|
|
// handle disarmed case
|
|
if (_disarm_disable_pwm) {
|
|
for (uint8_t i=0; i<_motors_num; i++) {
|
|
SRV_Channels::set_output_limit(SRV_Channels::get_motor_function(i), SRV_Channel::Limit::ZERO_PWM);
|
|
}
|
|
} else {
|
|
for (uint8_t i=0; i<_motors_num; i++) {
|
|
SRV_Channels::set_output_limit(SRV_Channels::get_motor_function(i), SRV_Channel::Limit::TRIM);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// output throttle value to main throttle channel, left throttle or right throttle. throttle should be scaled from -100 to 100
|
|
void AP_MotorsUGV::output_throttle(SRV_Channel::Aux_servo_function_t function, float throttle, float dt)
|
|
{
|
|
// sanity check servo function
|
|
if (function != SRV_Channel::k_throttle && function != SRV_Channel::k_throttleLeft && function != SRV_Channel::k_throttleRight && function != SRV_Channel::k_motor1 && function != SRV_Channel::k_motor2 && function != SRV_Channel::k_motor3 && function!= SRV_Channel::k_motor4) {
|
|
return;
|
|
}
|
|
|
|
// constrain and scale output
|
|
throttle = get_scaled_throttle(throttle);
|
|
|
|
// apply rate control
|
|
throttle = get_rate_controlled_throttle(function, throttle, dt);
|
|
|
|
// set relay if necessary
|
|
if (_pwm_type == PWM_TYPE_BRUSHED_WITH_RELAY) {
|
|
// find the output channel, if not found return
|
|
const SRV_Channel *out_chan = SRV_Channels::get_channel_for(function);
|
|
if (out_chan == nullptr) {
|
|
return;
|
|
}
|
|
const int8_t reverse_multiplier = out_chan->get_reversed() ? -1 : 1;
|
|
bool relay_high = is_negative(reverse_multiplier * throttle);
|
|
|
|
switch (function) {
|
|
case SRV_Channel::k_throttle:
|
|
case SRV_Channel::k_throttleLeft:
|
|
case SRV_Channel::k_motor1:
|
|
_relayEvents.do_set_relay(0, relay_high);
|
|
break;
|
|
case SRV_Channel::k_throttleRight:
|
|
case SRV_Channel::k_motor2:
|
|
_relayEvents.do_set_relay(1, relay_high);
|
|
break;
|
|
case SRV_Channel::k_motor3:
|
|
_relayEvents.do_set_relay(2, relay_high);
|
|
break;
|
|
case SRV_Channel::k_motor4:
|
|
_relayEvents.do_set_relay(3, relay_high);
|
|
break;
|
|
default:
|
|
// do nothing
|
|
break;
|
|
}
|
|
// invert the output to always have positive value calculated by calc_pwm
|
|
throttle = reverse_multiplier * fabsf(throttle);
|
|
}
|
|
|
|
// output to servo channel
|
|
switch (function) {
|
|
case SRV_Channel::k_throttle:
|
|
case SRV_Channel::k_motor1:
|
|
case SRV_Channel::k_motor2:
|
|
case SRV_Channel::k_motor3:
|
|
case SRV_Channel::k_motor4:
|
|
SRV_Channels::set_output_scaled(function, throttle);
|
|
break;
|
|
case SRV_Channel::k_throttleLeft:
|
|
case SRV_Channel::k_throttleRight:
|
|
SRV_Channels::set_output_scaled(function, throttle * 10.0f);
|
|
break;
|
|
default:
|
|
// do nothing
|
|
break;
|
|
}
|
|
}
|
|
|
|
// output for sailboat's mainsail
|
|
void AP_MotorsUGV::output_mainsail()
|
|
{
|
|
if (!has_sail()) {
|
|
return;
|
|
}
|
|
|
|
SRV_Channels::set_output_scaled(SRV_Channel::k_mainsail_sheet, _mainsail);
|
|
}
|
|
|
|
// slew limit throttle for one iteration
|
|
void AP_MotorsUGV::slew_limit_throttle(float dt)
|
|
{
|
|
const float throttle_orig = _throttle;
|
|
_throttle = get_slew_limited_throttle(_throttle, dt);
|
|
if (throttle_orig > _throttle) {
|
|
limit.throttle_upper = true;
|
|
} else if (throttle_orig < _throttle) {
|
|
limit.throttle_lower = true;
|
|
}
|
|
_throttle_prev = _throttle;
|
|
}
|
|
|
|
// set limits based on steering and throttle input
|
|
void AP_MotorsUGV::set_limits_from_input(bool armed, float steering, float throttle)
|
|
{
|
|
// set limits based on inputs
|
|
limit.steer_left = !armed || (steering <= -4500.0f);
|
|
limit.steer_right = !armed || (steering >= 4500.0f);
|
|
limit.throttle_lower = !armed || (throttle <= -_throttle_max);
|
|
limit.throttle_upper = !armed || (throttle >= _throttle_max);
|
|
}
|
|
|
|
// scale a throttle using the _throttle_min and _thrust_curve_expo parameters. throttle should be in the range -100 to +100
|
|
float AP_MotorsUGV::get_scaled_throttle(float throttle) const
|
|
{
|
|
// exit immediately if throttle is zero
|
|
if (is_zero(throttle)) {
|
|
return throttle;
|
|
}
|
|
|
|
// scale using throttle_min
|
|
if (_throttle_min > 0) {
|
|
if (is_negative(throttle)) {
|
|
throttle = -_throttle_min + (throttle * ((100.0f - _throttle_min) / 100.0f));
|
|
} else {
|
|
throttle = _throttle_min + (throttle * ((100.0f - _throttle_min) / 100.0f));
|
|
}
|
|
}
|
|
|
|
// skip further scaling if thrust curve disabled or invalid
|
|
if (is_zero(_thrust_curve_expo) || (_thrust_curve_expo > 1.0f) || (_thrust_curve_expo < -1.0f)) {
|
|
return throttle;
|
|
}
|
|
|
|
// calculate scaler
|
|
const float sign = (throttle < 0.0f) ? -1.0f : 1.0f;
|
|
const float throttle_pct = constrain_float(throttle, -100.0f, 100.0f) / 100.0f;
|
|
return 100.0f * sign * ((_thrust_curve_expo - 1.0f) + safe_sqrt((1.0f - _thrust_curve_expo) * (1.0f - _thrust_curve_expo) + 4.0f * _thrust_curve_expo * fabsf(throttle_pct))) / (2.0f * _thrust_curve_expo);
|
|
}
|
|
|
|
// use rate controller to achieve desired throttle
|
|
float AP_MotorsUGV::get_rate_controlled_throttle(SRV_Channel::Aux_servo_function_t function, float throttle, float dt)
|
|
{
|
|
// require non-zero dt
|
|
if (!is_positive(dt)) {
|
|
return throttle;
|
|
}
|
|
|
|
// attempt to rate control left throttle
|
|
if ((function == SRV_Channel::k_throttleLeft) && rover.get_wheel_rate_control().enabled(0)) {
|
|
return rover.get_wheel_rate_control().get_rate_controlled_throttle(0, throttle, dt);
|
|
}
|
|
|
|
// rate control right throttle
|
|
if ((function == SRV_Channel::k_throttleRight) && rover.get_wheel_rate_control().enabled(1)) {
|
|
return rover.get_wheel_rate_control().get_rate_controlled_throttle(1, throttle, dt);
|
|
}
|
|
|
|
// return throttle unchanged
|
|
return throttle;
|
|
}
|
|
|
|
// return true if motors are moving
|
|
bool AP_MotorsUGV::active() const
|
|
{
|
|
// if soft disarmed, motors not active
|
|
if (!hal.util->get_soft_armed()) {
|
|
return false;
|
|
}
|
|
|
|
// check throttle is active
|
|
if (!is_zero(get_throttle())) {
|
|
return true;
|
|
}
|
|
|
|
// skid-steering vehicles active when steering
|
|
if (have_skid_steering() && !is_zero(get_steering())) {
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|