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/****************************************************************************
*
* Copyright (c) 2015 PX4 Development Team. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name PX4 nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/**
* @file mavlink.cpp
* Dummy mavlink node that interfaces to a mavros node via UDP
* This simulates the onboard mavlink app to some degree. It should be possible to
* send offboard setpoints via mavros to the SITL setup the same way as on the real system
*
* @author Thomas Gubler <thomasgubler@gmail.com>
*/
#include "mavlink.h"
#include <platforms/px4_middleware.h>
using namespace px4;
Mavlink::Mavlink() :
_n(),
_v_att_sub(_n.subscribe("vehicle_attitude", 1, &Mavlink::VehicleAttitudeCallback, this)),
_v_local_pos_sub(_n.subscribe("vehicle_local_position", 1, &Mavlink::VehicleLocalPositionCallback, this)),
_v_att_sp_pub(_n.advertise<vehicle_attitude_setpoint>("vehicle_attitude_setpoint", 1)),
_pos_sp_triplet_pub(_n.advertise<position_setpoint_triplet>("position_setpoint_triplet", 1)),
_offboard_control_mode_pub(_n.advertise<offboard_control_mode>("offboard_control_mode", 1)),
_force_sp_pub(_n.advertise<vehicle_force_setpoint>("vehicle_force_setpoint", 1))
{
_link = mavconn::MAVConnInterface::open_url("udp://localhost:14565@localhost:14560");
_link->message_received.connect(boost::bind(&Mavlink::handle_msg, this, _1, _2, _3));
}
int main(int argc, char **argv)
{
ros::init(argc, argv, "mavlink");
Mavlink m;
ros::spin();
return 0;
}
void Mavlink::VehicleAttitudeCallback(const vehicle_attitudeConstPtr &msg)
{
mavlink_message_t msg_m;
mavlink_msg_attitude_quaternion_pack_chan(
_link->get_system_id(),
_link->get_component_id(),
_link->get_channel(),
&msg_m,
get_time_micros() / 1000,
msg->q[0],
msg->q[1],
msg->q[2],
msg->q[3],
msg->rollspeed,
msg->pitchspeed,
msg->yawspeed);
_link->send_message(&msg_m);
}
void Mavlink::VehicleLocalPositionCallback(const vehicle_local_positionConstPtr &msg)
{
mavlink_message_t msg_m;
mavlink_msg_local_position_ned_pack_chan(
_link->get_system_id(),
_link->get_component_id(),
_link->get_channel(),
&msg_m,
get_time_micros() / 1000,
msg->x,
msg->y,
msg->z,
msg->vx,
msg->vy,
msg->vz);
_link->send_message(&msg_m);
}
void Mavlink::handle_msg(const mavlink_message_t *mmsg, uint8_t sysid, uint8_t compid) {
(void)sysid;
(void)compid;
switch(mmsg->msgid) {
case MAVLINK_MSG_ID_SET_ATTITUDE_TARGET:
handle_msg_set_attitude_target(mmsg);
break;
case MAVLINK_MSG_ID_SET_POSITION_TARGET_LOCAL_NED:
handle_msg_set_position_target_local_ned(mmsg);
break;
default:
break;
}
}
void Mavlink::handle_msg_set_attitude_target(const mavlink_message_t *mmsg)
{
mavlink_set_attitude_target_t set_attitude_target;
mavlink_msg_set_attitude_target_decode(mmsg, &set_attitude_target);
offboard_control_mode offboard_control_mode;
/* set correct ignore flags for thrust field: copy from mavlink message */
offboard_control_mode.ignore_thrust = (bool)(set_attitude_target.type_mask & (1 << 6));
/*
* if attitude or body rate have been used (not ignored) previously and this message only sends
* throttle and has the ignore bits set for attitude and rates don't change the flags for attitude and
* body rates to keep the controllers running
*/
bool ignore_bodyrate = (bool)(set_attitude_target.type_mask & 0x7);
bool ignore_attitude = (bool)(set_attitude_target.type_mask & (1 << 7));
if (ignore_bodyrate && ignore_attitude && !offboard_control_mode.ignore_thrust) {
/* Message want's us to ignore everything except thrust: only ignore if previously ignored */
offboard_control_mode.ignore_bodyrate = ignore_bodyrate && offboard_control_mode.ignore_bodyrate;
offboard_control_mode.ignore_attitude = ignore_attitude && offboard_control_mode.ignore_attitude;
} else {
offboard_control_mode.ignore_bodyrate = ignore_bodyrate;
offboard_control_mode.ignore_attitude = ignore_attitude;
}
offboard_control_mode.timestamp = get_time_micros();
_offboard_control_mode_pub.publish(offboard_control_mode);
vehicle_attitude_setpoint att_sp;
/* The real mavlink app has a ckeck at this location which makes sure that the attitude setpoint
* gets published only if in offboard mode. We leave that out for now.
*/
att_sp.timestamp = get_time_micros();
mavlink_quaternion_to_euler(set_attitude_target.q, &att_sp.roll_body, &att_sp.pitch_body,
&att_sp.yaw_body);
mavlink_quaternion_to_dcm(set_attitude_target.q, (float(*)[3])att_sp.R_body.data());
att_sp.R_valid = true;
att_sp.thrust = set_attitude_target.thrust;
for (ssize_t i = 0; i < 4; i++) {
att_sp.q_d[i] = set_attitude_target.q[i];
}
att_sp.q_d_valid = true;
_v_att_sp_pub.publish(att_sp);
}
void Mavlink::handle_msg_set_position_target_local_ned(const mavlink_message_t *mmsg)
{
mavlink_set_position_target_local_ned_t set_position_target_local_ned;
mavlink_msg_set_position_target_local_ned_decode(mmsg, &set_position_target_local_ned);
offboard_control_mode offboard_control_mode;
// memset(&offboard_control_mode, 0, sizeof(offboard_control_mode));//XXX breaks compatibility with multiple setpoints
/* Only accept messages which are intended for this system */
// XXX removed for sitl, makes maybe sense to re-introduce at some point
// if ((mavlink_system.sysid == set_position_target_local_ned.target_system ||
// set_position_target_local_ned.target_system == 0) &&
// (mavlink_system.compid == set_position_target_local_ned.target_component ||
// set_position_target_local_ned.target_component == 0)) {
/* convert mavlink type (local, NED) to uORB offboard control struct */
offboard_control_mode.ignore_position = (bool)(set_position_target_local_ned.type_mask & 0x7);
offboard_control_mode.ignore_velocity = (bool)(set_position_target_local_ned.type_mask & 0x38);
offboard_control_mode.ignore_acceleration_force = (bool)(set_position_target_local_ned.type_mask & 0x1C0);
bool is_force_sp = (bool)(set_position_target_local_ned.type_mask & (1 << 9));
/* yaw ignore flag mapps to ignore_attitude */
offboard_control_mode.ignore_attitude = (bool)(set_position_target_local_ned.type_mask & 0x400);
/* yawrate ignore flag mapps to ignore_bodyrate */
offboard_control_mode.ignore_bodyrate = (bool)(set_position_target_local_ned.type_mask & 0x800);
offboard_control_mode.timestamp = get_time_micros();
_offboard_control_mode_pub.publish(offboard_control_mode);
/* The real mavlink app has a ckeck at this location which makes sure that the position setpoint triplet
* gets published only if in offboard mode. We leave that out for now.
*/
if (is_force_sp && offboard_control_mode.ignore_position &&
offboard_control_mode.ignore_velocity) {
/* The offboard setpoint is a force setpoint only, directly writing to the force
* setpoint topic and not publishing the setpoint triplet topic */
vehicle_force_setpoint force_sp;
force_sp.x = set_position_target_local_ned.afx;
force_sp.y = set_position_target_local_ned.afy;
force_sp.z = set_position_target_local_ned.afz;
//XXX: yaw
_force_sp_pub.publish(force_sp);
} else {
/* It's not a pure force setpoint: publish to setpoint triplet topic */
position_setpoint_triplet pos_sp_triplet;
pos_sp_triplet.previous.valid = false;
pos_sp_triplet.next.valid = false;
pos_sp_triplet.current.valid = true;
pos_sp_triplet.current.type = position_setpoint::SETPOINT_TYPE_POSITION; //XXX support others
/* set the local pos values */
if (!offboard_control_mode.ignore_position) {
pos_sp_triplet.current.position_valid = true;
pos_sp_triplet.current.x = set_position_target_local_ned.x;
pos_sp_triplet.current.y = set_position_target_local_ned.y;
pos_sp_triplet.current.z = set_position_target_local_ned.z;
} else {
pos_sp_triplet.current.position_valid = false;
}
/* set the local vel values */
if (!offboard_control_mode.ignore_velocity) {
pos_sp_triplet.current.velocity_valid = true;
pos_sp_triplet.current.vx = set_position_target_local_ned.vx;
pos_sp_triplet.current.vy = set_position_target_local_ned.vy;
pos_sp_triplet.current.vz = set_position_target_local_ned.vz;
} else {
pos_sp_triplet.current.velocity_valid = false;
}
/* set the local acceleration values if the setpoint type is 'local pos' and none
* of the accelerations fields is set to 'ignore' */
if (!offboard_control_mode.ignore_acceleration_force) {
pos_sp_triplet.current.acceleration_valid = true;
pos_sp_triplet.current.a_x = set_position_target_local_ned.afx;
pos_sp_triplet.current.a_y = set_position_target_local_ned.afy;
pos_sp_triplet.current.a_z = set_position_target_local_ned.afz;
pos_sp_triplet.current.acceleration_is_force =
is_force_sp;
} else {
pos_sp_triplet.current.acceleration_valid = false;
}
/* set the yaw sp value */
if (!offboard_control_mode.ignore_attitude) {
pos_sp_triplet.current.yaw_valid = true;
pos_sp_triplet.current.yaw = set_position_target_local_ned.yaw;
} else {
pos_sp_triplet.current.yaw_valid = false;
}
/* set the yawrate sp value */
if (!offboard_control_mode.ignore_bodyrate) {
pos_sp_triplet.current.yawspeed_valid = true;
pos_sp_triplet.current.yawspeed = set_position_target_local_ned.yaw_rate;
} else {
pos_sp_triplet.current.yawspeed_valid = false;
}
//XXX handle global pos setpoints (different MAV frames)
_pos_sp_triplet_pub.publish(pos_sp_triplet);
}
}
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