ardupilot/libraries/AP_Motors/AP_MotorsTri.h

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// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
/// @file AP_MotorsTri.h
/// @brief Motor control class for Tricopters
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#ifndef __AP_MOTORS_TRI_H__
#define __AP_MOTORS_TRI_H__
#include <AP_Common/AP_Common.h>
#include <AP_Math/AP_Math.h> // ArduPilot Mega Vector/Matrix math Library
#include <RC_Channel/RC_Channel.h> // RC Channel Library
#include "AP_MotorsMulticopter.h"
// tail servo uses channel 7
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#define AP_MOTORS_CH_TRI_YAW CH_7
/// @class AP_MotorsTri
class AP_MotorsTri : public AP_MotorsMulticopter {
public:
/// Constructor
AP_MotorsTri(uint16_t loop_rate, uint16_t speed_hz = AP_MOTORS_SPEED_DEFAULT) :
AP_MotorsMulticopter(loop_rate, speed_hz)
{
AP_Param::setup_object_defaults(this, var_info);
};
// init
virtual void Init();
// set update rate to motors - a value in hertz
void set_update_rate( uint16_t speed_hz );
// enable - starts allowing signals to be sent to motors
virtual void enable();
// output_test - spin a motor at the pwm value specified
// motor_seq is the motor's sequence number from 1 to the number of motors on the frame
// pwm value is an actual pwm value that will be output, normally in the range of 1000 ~ 2000
virtual void output_test(uint8_t motor_seq, int16_t pwm);
// output_min - sends minimum values out to the motors
virtual void output_min();
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// get_motor_mask - returns a bitmask of which outputs are being used for motors or servos (1 means being used)
// this can be used to ensure other pwm outputs (i.e. for servos) do not conflict
virtual uint16_t get_motor_mask();
// var_info for holding Parameter information
static const struct AP_Param::GroupInfo var_info[];
protected:
// output - sends commands to the motors
void output_armed_stabilizing();
void output_armed_not_stabilizing();
void output_disarmed();
// calc_yaw_radio_output - calculate final radio output for yaw channel
int16_t calc_yaw_radio_output(); // calculate radio output for yaw servo, typically in range of 1100-1900
// parameters
AP_Int8 _yaw_servo_reverse; // Yaw servo signal reversing
AP_Int16 _yaw_servo_trim; // Trim or center position of yaw servo
AP_Int16 _yaw_servo_min; // Minimum angle limit of yaw servo
AP_Int16 _yaw_servo_max; // Maximum angle limit of yaw servo
};
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#endif // AP_MOTORSTRI