static int
mc_thread_main(int argc, char *argv[])
{
/* structures */
struct vehicle_status_s state;
struct vehicle_attitude_s att;
struct rc_channels_s rc;
struct actuator_controls_s actuators;
struct actuator_armed_s armed;
/* 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 rc_sub = orb_subscribe(ORB_ID(rc_channels));
/* rate-limit the attitude subscription to 200Hz to pace our loop */
orb_set_interval(att_sub, 5);
struct pollfd fds = { .fd = att_sub, .events = POLLIN };
/* publish actuator controls */
for (unsigned i = 0; i < NUM_ACTUATOR_CONTROLS; i++)
actuators.control[i] = 0.0f;
int actuator_pub = orb_advertise(ORB_ID_VEHICLE_ATTITUDE_CONTROLS, &actuators);
armed.armed = true;
int armed_pub = orb_advertise(ORB_ID(actuator_armed), &armed);
/* register the perf counter */
perf_counter_t mc_loop_perf = perf_alloc(PC_ELAPSED, "multirotor_control");
/* welcome user */
printf("[multirotor_control] starting\n");
while (!thread_should_exit) {
/* wait for a sensor update */
poll(&fds, 1, -1);
perf_begin(mc_loop_perf);
/* get a local copy of the vehicle state */
orb_copy(ORB_ID(vehicle_status), state_sub, &state);
/* get a local copy of rc inputs */
orb_copy(ORB_ID(rc_channels), rc_sub, &rc);
/* get a local copy of attitude */
orb_copy(ORB_ID(vehicle_attitude), att_sub, &att);
/* run the attitude controller */
multirotor_control_attitude(&rc, &att, &state, &actuators);
/* publish the result */
orb_publish(ORB_ID_VEHICLE_ATTITUDE_CONTROLS, actuator_pub, &actuators);
perf_end(mc_loop_perf);
}
printf("[multirotor_control] stopping\r\n");
/* kill all outputs */
armed.armed = false;
orb_publish(ORB_ID(actuator_armed), armed_pub, &armed);
for (unsigned i = 0; i < NUM_ACTUATOR_CONTROLS; i++)
actuators.control[i] = 0.0f;
orb_publish(ORB_ID_VEHICLE_ATTITUDE_CONTROLS, actuator_pub, &actuators);
close(att_sub);
close(state_sub);
close(rc_sub);
close(actuator_pub);
close(armed_pub);
perf_print_counter(mc_loop_perf);
perf_free(mc_loop_perf);
fflush(stdout);
exit(0);
}
void *multirotor_attitude_control_thread_main()
{
/* welcome user */
fprintf (stdout, "Multirotor attitude controller started\n");
fflush(stdout);
int i;
bool_t updated, rates_sp_updated, reset_integral;
float rates[3];
/* store last control mode to detect mode switches */
bool_t control_yaw_position = 1 /* true */;
bool_t reset_yaw_sp = 1 /* true */;
/* declare and safely initialize all structs */
struct parameter_update_s update;
struct vehicle_attitude_s att;
memset(&att, 0, sizeof(att));
struct vehicle_attitude_setpoint_s att_sp;
memset(&att_sp, 0, sizeof(att_sp));
struct offboard_control_setpoint_s offboard_sp;
memset(&offboard_sp, 0, sizeof(offboard_sp));
struct vehicle_control_flags_s control_flags;
memset(&control_flags, 0, sizeof(control_flags));
struct manual_control_setpoint_s manual;
memset(&manual, 0, sizeof(manual));
struct sensor_combined_s sensor;
memset(&sensor, 0, sizeof(sensor));
struct vehicle_rates_setpoint_s rates_sp;
memset(&rates_sp, 0, sizeof(rates_sp));
struct vehicle_status_s status;
memset(&status, 0, sizeof(status));
struct actuator_controls_s actuators;
memset(&actuators, 0, sizeof(actuators));
/* subscribe */
orb_subscr_t vehicle_attitude_sub = orb_subscribe(ORB_ID(vehicle_attitude));
if (vehicle_attitude_sub < 0)
{
fprintf (stderr, "Attitude controller thread failed to subscribe to vehicle_attitude topic\n");
exit(-1);
}
orb_subscr_t parameter_update_sub = orb_subscribe(ORB_ID(parameter_update));
if (parameter_update_sub < 0)
{
fprintf (stderr, "Attitude controller thread failed to subscribe to parameter_update topic\n");
exit(-1);
}
orb_subscr_t vehicle_attitude_setpoint_sub = orb_subscribe(ORB_ID(vehicle_attitude_setpoint));
if (vehicle_attitude_setpoint_sub < 0)
{
fprintf (stderr, "Attitude controller thread failed to subscribe to vehicle_attitude_setpoint topic\n");
exit(-1);
}
orb_subscr_t offboard_control_setpoint_sub = orb_subscribe(ORB_ID(offboard_control_setpoint));
if (offboard_control_setpoint_sub < 0)
{
fprintf (stderr, "Attitude controller thread failed to subscribe to offboard_control_setpoint topic\n");
exit(-1);
}
orb_subscr_t vehicle_control_flags_sub = orb_subscribe(ORB_ID(vehicle_control_flags));
if (vehicle_control_flags_sub < 0)
{
fprintf (stderr, "Attitude controller thread failed to subscribe to vehicle_control_flags topic\n");
exit(-1);
}
orb_subscr_t manual_control_setpoint_sub = orb_subscribe(ORB_ID(manual_control_setpoint));
if (manual_control_setpoint_sub < 0)
{
fprintf (stderr, "Attitude controller thread failed to subscribe to manual_control_setpoint topic\n");
exit(-1);
}
orb_subscr_t sensor_combined_sub = orb_subscribe(ORB_ID(sensor_combined));
if (sensor_combined_sub < 0)
{
fprintf (stderr, "Attitude controller thread failed to subscribe to sensor_combined topic\n");
exit(-1);
}
orb_subscr_t vehicle_rates_setpoint_sub = orb_subscribe(ORB_ID(vehicle_rates_setpoint));
if (vehicle_rates_setpoint_sub < 0)
{
fprintf (stderr, "Attitude controller thread failed to subscribe to vehicle_rates_setpoint topic\n");
exit(-1);
}
orb_subscr_t vehicle_status_sub = orb_subscribe(ORB_ID(vehicle_status));
if (vehicle_status_sub < 0)
{
fprintf (stderr, "Attitude controller thread failed to subscribe to vehicle_status topic\n");
exit(-1);
}
/* publish actuator controls */
for (i = 0; i < NUM_ACTUATOR_CONTROLS; i++) {
actuators.control[i] = 0.0f;
}
orb_advert_t actuator_pub = orb_advertise(ORB_ID_VEHICLE_ATTITUDE_CONTROLS);
if (actuator_pub == -1)
{
fprintf (stderr, "Comunicator thread failed to advertise the actutor_controls topic\n");
exit (-1);
}
orb_publish(ORB_ID_VEHICLE_ATTITUDE_CONTROLS, actuator_pub, &actuators);
orb_advert_t att_sp_pub = orb_advertise(ORB_ID(vehicle_attitude_setpoint));
if (att_sp_pub == -1)
{
fprintf (stderr, "Comunicator thread failed to advertise the vehicle_attitude_setpoint topic\n");
exit (-1);
}
orb_publish(ORB_ID(vehicle_attitude_setpoint), att_sp_pub, &att_sp);
orb_advert_t rates_sp_pub = orb_advertise(ORB_ID(vehicle_rates_setpoint));
if (rates_sp_pub == -1)
{
fprintf (stderr, "Comunicator thread failed to advertise the vehicle_rates_setpoint topic\n");
exit (-1);
}
orb_publish(ORB_ID(vehicle_rates_setpoint), rates_sp_pub, &rates_sp);
while (!_shutdown_all_systems) {
/* wait for a sensor update, check for exit condition every 500 ms */
updated = orb_poll(ORB_ID(vehicle_attitude), vehicle_attitude_sub, 500000);
/* timed out - periodic check for _shutdown_all_systems, etc. */
if (!updated)
continue;
/* this is undesirable but not much we can do - might want to flag unhappy status */
if (updated < 0) {
fprintf (stderr, "Attitude controller failed to poll vehicle attitude\n");
continue;
}
/* only run controller if attitude changed */
/* attitude */
orb_copy(ORB_ID(vehicle_attitude), vehicle_attitude_sub, &att);
/* parameters */
updated = orb_check (ORB_ID(parameter_update), parameter_update_sub);
if (updated) {
orb_copy(ORB_ID(parameter_update), parameter_update_sub, &update);
/* update parameters */
}
/* control mode */
updated = orb_check (ORB_ID(vehicle_control_flags), vehicle_control_flags_sub);
if (updated) {
orb_copy(ORB_ID(vehicle_control_flags), vehicle_control_flags_sub, &control_flags);
}
/* manual control setpoint */
updated = orb_check (ORB_ID(manual_control_setpoint), manual_control_setpoint_sub);
if (updated) {
orb_copy(ORB_ID(manual_control_setpoint), manual_control_setpoint_sub, &manual);
}
/* attitude setpoint */
updated = orb_check (ORB_ID(vehicle_attitude_setpoint), vehicle_attitude_setpoint_sub);
if (updated) {
orb_copy(ORB_ID(vehicle_attitude_setpoint), vehicle_attitude_setpoint_sub, &att_sp);
}
/* offboard control setpoint */
updated = orb_check (ORB_ID(offboard_control_setpoint), offboard_control_setpoint_sub);
if (updated) {
orb_copy(ORB_ID(offboard_control_setpoint), offboard_control_setpoint_sub, &offboard_sp);
}
/* vehicle status */
updated = orb_check (ORB_ID(vehicle_status), vehicle_status_sub);
if (updated) {
orb_copy(ORB_ID(vehicle_status), vehicle_status_sub, &status);
}
/* sensors */
updated = orb_check (ORB_ID(sensor_combined), sensor_combined_sub);
if (updated) {
orb_copy(ORB_ID(sensor_combined), sensor_combined_sub, &sensor);
}
/* set flag to safe value */
control_yaw_position = 1 /* true */;
/* reset yaw setpoint if not armed */
if (!control_flags.flag_armed) {
reset_yaw_sp = 1 /* true */;
}
/* define which input is the dominating control input */
if (control_flags.flag_control_offboard_enabled) {
/* offboard inputs */
if (offboard_sp.mode == OFFBOARD_CONTROL_MODE_DIRECT_RATES) {
rates_sp.roll = offboard_sp.p1;
rates_sp.pitch = offboard_sp.p2;
rates_sp.yaw = offboard_sp.p3;
rates_sp.thrust = offboard_sp.p4;
rates_sp.timestamp = get_absolute_time();
orb_publish(ORB_ID(vehicle_rates_setpoint), rates_sp_pub, &rates_sp);
} else if (offboard_sp.mode == OFFBOARD_CONTROL_MODE_DIRECT_ATTITUDE) {
att_sp.roll_body = offboard_sp.p1;
att_sp.pitch_body = offboard_sp.p2;
att_sp.yaw_body = offboard_sp.p3;
att_sp.thrust = offboard_sp.p4;
att_sp.timestamp = get_absolute_time();
/* publish the result to the vehicle actuators */
orb_publish(ORB_ID(vehicle_attitude_setpoint), att_sp_pub, &att_sp);
}
/* reset yaw setpoint after offboard control */
reset_yaw_sp = 1 /* true */;
} else if (control_flags.flag_control_manual_enabled) {
/* manual input */
if (control_flags.flag_control_attitude_enabled) {
/* control attitude, update attitude setpoint depending on mode */
if (att_sp.thrust < 0.1f) {
/* no thrust, don't try to control yaw */
rates_sp.yaw = 0.0f;
control_yaw_position = 0 /* false */;
if (status.condition_landed) {
/* reset yaw setpoint if on ground */
reset_yaw_sp = 1 /* true */;
}
} else {
/* only move yaw setpoint if manual input is != 0 */
if (manual.yaw < -yaw_deadzone || yaw_deadzone < manual.yaw) {
/* control yaw rate */
control_yaw_position = 0 /* false */;
rates_sp.yaw = manual.yaw;
reset_yaw_sp = 1 /* true */; // has no effect on control, just for beautiful log
} else {
control_yaw_position = 1 /* true */;
}
}
if (!control_flags.flag_control_velocity_enabled) {
/* update attitude setpoint if not in position control mode */
att_sp.roll_body = manual.roll;
att_sp.pitch_body = manual.pitch;
if (!control_flags.flag_control_climb_rate_enabled) {
/* pass throttle directly if not in altitude control mode */
att_sp.thrust = manual.thrust;
}
}
/* reset yaw setpint to current position if needed */
if (reset_yaw_sp) {
att_sp.yaw_body = att.yaw;
reset_yaw_sp = 0 /* false */;
}
/*if (motor_test_mode) {
printf("testmode");
att_sp.roll_body = 0.0f;
att_sp.pitch_body = 0.0f;
att_sp.yaw_body = 0.0f;
att_sp.thrust = 0.1f;
}*/
att_sp.timestamp = get_absolute_time();
/* publish the attitude setpoint */
orb_publish(ORB_ID(vehicle_attitude_setpoint), att_sp_pub, &att_sp);
} else {
/* manual rate inputs (ACRO), from RC control or joystick */
if (control_flags.flag_control_rates_enabled) {
rates_sp.roll = manual.roll;
rates_sp.pitch = manual.pitch;
rates_sp.yaw = manual.yaw;
rates_sp.thrust = manual.thrust;
rates_sp.timestamp = get_absolute_time();
}
/* reset yaw setpoint after ACRO */
reset_yaw_sp = 1 /* true */;
}
} else {
if (!control_flags.flag_control_auto_enabled) {
/* no control, try to stay on place */
if (!control_flags.flag_control_velocity_enabled) {
/* no velocity control, reset attitude setpoint */
att_sp.roll_body = 0.0f;
att_sp.pitch_body = 0.0f;
att_sp.timestamp = get_absolute_time();
orb_publish(ORB_ID(vehicle_attitude_setpoint), att_sp_pub, &att_sp);
}
}
/* reset yaw setpoint after non-manual control */
reset_yaw_sp = 1 /* true */;
}
/* check if we should we reset integrals */
reset_integral = !control_flags.flag_armed || att_sp.thrust < 0.1f; // TODO use landed status instead of throttle
/* run attitude controller if needed */
if (control_flags.flag_control_attitude_enabled) {
multirotor_control_attitude(&att_sp, &att, &rates_sp, control_yaw_position, reset_integral);
orb_publish(ORB_ID(vehicle_rates_setpoint), rates_sp_pub, &rates_sp);
}
/* run rates controller if needed */
if (control_flags.flag_control_rates_enabled) {
/* get current rate setpoint */
rates_sp_updated = orb_check (ORB_ID(vehicle_rates_setpoint), vehicle_rates_setpoint_sub);
if (rates_sp_updated) {
orb_copy(ORB_ID(vehicle_rates_setpoint), vehicle_rates_setpoint_sub, &rates_sp);
}
/* apply controller */
rates[0] = att.roll_rate;
rates[1] = att.pitch_rate;
rates[2] = att.yaw_rate;
multirotor_control_rates(&rates_sp, rates, &actuators, reset_integral);
} else {
/* rates controller disabled, set actuators to zero for safety */
actuators.control[0] = 0.0f;
actuators.control[1] = 0.0f;
actuators.control[2] = 0.0f;
actuators.control[3] = 0.0f;
}
/* fill in manual control values */
actuators.control[4] = manual.flaps;
//actuators.control[5] = manual.aux1;
//actuators.control[6] = manual.aux2;
//actuators.control[7] = manual.aux3;
orb_publish(ORB_ID_VEHICLE_ATTITUDE_CONTROLS, actuator_pub, &actuators);
}
fprintf (stdout, "INFO: Attitude controller exiting, disarming motors\n");
fflush (stdout);
/* kill all outputs */
for (i = 0; i < NUM_ACTUATOR_CONTROLS; i++)
actuators.control[i] = 0.0f;
orb_publish(ORB_ID_VEHICLE_ATTITUDE_CONTROLS, actuator_pub, &actuators);
/*
* do unsubscriptions
*/
orb_unsubscribe(ORB_ID(vehicle_attitude), vehicle_attitude_sub, pthread_self());
orb_unsubscribe(ORB_ID(parameter_update), parameter_update_sub, pthread_self());
orb_unsubscribe(ORB_ID(vehicle_attitude_setpoint), vehicle_attitude_setpoint_sub, pthread_self());
orb_unsubscribe(ORB_ID(offboard_control_setpoint), offboard_control_setpoint_sub, pthread_self());
orb_unsubscribe(ORB_ID(vehicle_control_flags), vehicle_control_flags_sub, pthread_self());
orb_unsubscribe(ORB_ID(manual_control_setpoint), manual_control_setpoint_sub, pthread_self());
orb_unsubscribe(ORB_ID(sensor_combined), sensor_combined_sub, pthread_self());
orb_unsubscribe(ORB_ID(vehicle_rates_setpoint), vehicle_rates_setpoint_sub, pthread_self());
orb_unsubscribe(ORB_ID(vehicle_status), vehicle_status_sub, pthread_self());
/*
* do unadvertises
*/
orb_unadvertise(ORB_ID_VEHICLE_ATTITUDE_CONTROLS, actuator_pub, pthread_self());
orb_unadvertise(ORB_ID(vehicle_attitude_setpoint), att_sp_pub, pthread_self());
orb_unadvertise(ORB_ID(vehicle_rates_setpoint), rates_sp_pub, pthread_self());
return 0;
}