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/****************************************************************************
*
* Copyright (C) 2008-2012 PX4 Development Team. All rights reserved.
* Author: Lorenz Meier <lm@inf.ethz.ch>
*
* 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 multirotor_pos_control.c
*
* Skeleton for multirotor position controller
*/
#include <nuttx/config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <debug.h>
#include <termios.h>
#include <time.h>
#include <sys/prctl.h>
#include <drivers/drv_hrt.h>
#include <uORB/uORB.h>
#include <uORB/topics/vehicle_status.h>
#include <uORB/topics/vehicle_attitude.h>
#include <uORB/topics/manual_control_setpoint.h>
#include <uORB/topics/vehicle_attitude_setpoint.h>
#include <uORB/topics/vehicle_local_position_setpoint.h>
#include <uORB/topics/vehicle_vicon_position.h>
#include <systemlib/systemlib.h>
#include "multirotor_pos_control_params.h"
static bool thread_should_exit = false; /**< Deamon exit flag */
static bool thread_running = false; /**< Deamon status flag */
static int deamon_task; /**< Handle of deamon task / thread */
__EXPORT int multirotor_pos_control_main(int argc, char *argv[]);
/**
* Mainloop of position controller.
*/
static int multirotor_pos_control_thread_main(int argc, char *argv[]);
/**
* Print the correct usage.
*/
static void usage(const char *reason);
static void
usage(const char *reason)
{
if (reason)
fprintf(stderr, "%s\n", reason);
fprintf(stderr, "usage: deamon {start|stop|status} [-p <additional params>]\n\n");
exit(1);
}
/**
* The deamon app only briefly exists to start
* the background job. The stack size assigned in the
* Makefile does only apply to this management task.
*
* The actual stack size should be set in the call
* to task_spawn_cmd().
*/
int multirotor_pos_control_main(int argc, char *argv[])
{
if (argc < 1)
usage("missing command");
if (!strcmp(argv[1], "start")) {
if (thread_running) {
printf("multirotor pos control already running\n");
/* this is not an error */
exit(0);
}
thread_should_exit = false;
deamon_task = task_spawn_cmd("multirotor pos control",
SCHED_DEFAULT,
SCHED_PRIORITY_MAX - 60,
4096,
multirotor_pos_control_thread_main,
(argv) ? (const char **)&argv[2] : (const char **)NULL);
exit(0);
}
if (!strcmp(argv[1], "stop")) {
thread_should_exit = true;
exit(0);
}
if (!strcmp(argv[1], "status")) {
if (thread_running) {
printf("\tmultirotor pos control app is running\n");
} else {
printf("\tmultirotor pos control app not started\n");
}
exit(0);
}
usage("unrecognized command");
exit(1);
}
static int
multirotor_pos_control_thread_main(int argc, char *argv[])
{
/* welcome user */
printf("[multirotor pos control] Control started, taking over position control\n");
/* structures */
struct vehicle_status_s state;
struct vehicle_attitude_s att;
//struct vehicle_global_position_setpoint_s global_pos_sp;
struct vehicle_local_position_setpoint_s local_pos_sp;
struct vehicle_vicon_position_s local_pos;
struct manual_control_setpoint_s manual;
struct vehicle_attitude_setpoint_s att_sp;
/* subscribe to attitude, motor setpoints and system state */
int att_sub = orb_subscribe(ORB_ID(vehicle_attitude));
int state_sub = orb_subscribe(ORB_ID(vehicle_status));
int manual_sub = orb_subscribe(ORB_ID(manual_control_setpoint));
int local_pos_sub = orb_subscribe(ORB_ID(vehicle_vicon_position));
//int global_pos_sp_sub = orb_subscribe(ORB_ID(vehicle_global_position_setpoint));
int local_pos_sp_sub = orb_subscribe(ORB_ID(vehicle_local_position_setpoint));
/* publish attitude setpoint */
orb_advert_t att_sp_pub = orb_advertise(ORB_ID(vehicle_attitude_setpoint), &att_sp);
thread_running = true;
int loopcounter = 0;
struct multirotor_position_control_params p;
struct multirotor_position_control_param_handles h;
parameters_init(&h);
parameters_update(&h, &p);
while (1) {
/* get a local copy of the vehicle state */
orb_copy(ORB_ID(vehicle_status), state_sub, &state);
/* get a local copy of manual setpoint */
orb_copy(ORB_ID(manual_control_setpoint), manual_sub, &manual);
/* get a local copy of attitude */
orb_copy(ORB_ID(vehicle_attitude), att_sub, &att);
/* get a local copy of local position */
orb_copy(ORB_ID(vehicle_vicon_position), local_pos_sub, &local_pos);
/* get a local copy of local position setpoint */
orb_copy(ORB_ID(vehicle_local_position_setpoint), local_pos_sp_sub, &local_pos_sp);
if (loopcounter == 500) {
parameters_update(&h, &p);
loopcounter = 0;
}
// if (state.state_machine == SYSTEM_STATE_AUTO) {
// XXX IMPLEMENT POSITION CONTROL HERE
float dT = 1.0f / 50.0f;
float x_setpoint = 0.0f;
// XXX enable switching between Vicon and local position estimate
/* local pos is the Vicon position */
// XXX just an example, lacks rotation around world-body transformation
att_sp.pitch_body = (local_pos.x - x_setpoint) * p.p;
att_sp.roll_body = 0.0f;
att_sp.yaw_body = 0.0f;
att_sp.thrust = 0.3f;
att_sp.timestamp = hrt_absolute_time();
/* publish new attitude setpoint */
orb_publish(ORB_ID(vehicle_attitude_setpoint), att_sp_pub, &att_sp);
// } else if (state.state_machine == SYSTEM_STATE_STABILIZED) {
/* set setpoint to current position */
// XXX select pos reset channel on remote
/* reset setpoint to current position (position hold) */
// if (1 == 2) {
// local_pos_sp.x = local_pos.x;
// local_pos_sp.y = local_pos.y;
// local_pos_sp.z = local_pos.z;
// local_pos_sp.yaw = att.yaw;
// }
// }
/* run at approximately 50 Hz */
usleep(20000);
loopcounter++;
}
printf("[multirotor pos control] ending now...\n");
thread_running = false;
fflush(stdout);
return 0;
}
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