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PX4-Autopilot/src/modules/commander/commander.cpp

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/****************************************************************************
*
* Copyright (C) 2013 PX4 Development Team. All rights reserved.
* Author: Petri Tanskanen <petri.tanskanen@inf.ethz.ch>
* Lorenz Meier <lm@inf.ethz.ch>
* Thomas Gubler <thomasgubler@student.ethz.ch>
* Julian Oes <joes@student.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 commander.cpp
* Main system state machine implementation.
*
*/
#include <nuttx/config.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <systemlib/err.h>
#include <debug.h>
#include <sys/prctl.h>
#include <sys/stat.h>
#include <string.h>
#include <math.h>
#include <poll.h>
#include <uORB/uORB.h>
#include <uORB/topics/sensor_combined.h>
#include <uORB/topics/battery_status.h>
#include <uORB/topics/manual_control_setpoint.h>
#include <uORB/topics/offboard_control_setpoint.h>
#include <uORB/topics/home_position.h>
#include <uORB/topics/vehicle_global_position.h>
#include <uORB/topics/vehicle_local_position.h>
#include <uORB/topics/vehicle_gps_position.h>
#include <uORB/topics/vehicle_command.h>
#include <uORB/topics/vehicle_control_mode.h>
#include <uORB/topics/subsystem_info.h>
#include <uORB/topics/actuator_controls.h>
#include <uORB/topics/actuator_armed.h>
#include <uORB/topics/parameter_update.h>
#include <uORB/topics/differential_pressure.h>
#include <uORB/topics/safety.h>
#include <drivers/drv_led.h>
#include <drivers/drv_hrt.h>
#include <drivers/drv_tone_alarm.h>
#include <mavlink/mavlink_log.h>
#include <systemlib/param/param.h>
#include <systemlib/systemlib.h>
#include <systemlib/err.h>
#include <systemlib/cpuload.h>
#include <systemlib/rc_check.h>
#include "px4_custom_mode.h"
#include "commander_helper.h"
#include "state_machine_helper.h"
#include "calibration_routines.h"
#include "accelerometer_calibration.h"
#include "gyro_calibration.h"
#include "mag_calibration.h"
#include "baro_calibration.h"
#include "rc_calibration.h"
#include "airspeed_calibration.h"
/* oddly, ERROR is not defined for c++ */
#ifdef ERROR
# undef ERROR
#endif
static const int ERROR = -1;
extern struct system_load_s system_load;
#define LOW_VOLTAGE_BATTERY_HYSTERESIS_TIME_MS 1000.0f
#define CRITICAL_VOLTAGE_BATTERY_HYSTERESIS_TIME_MS 100.0f
/* Decouple update interval and hysteris counters, all depends on intervals */
#define COMMANDER_MONITORING_INTERVAL 50000
#define COMMANDER_MONITORING_LOOPSPERMSEC (1/(COMMANDER_MONITORING_INTERVAL/1000.0f))
#define LOW_VOLTAGE_BATTERY_COUNTER_LIMIT (LOW_VOLTAGE_BATTERY_HYSTERESIS_TIME_MS*COMMANDER_MONITORING_LOOPSPERMSEC)
#define CRITICAL_VOLTAGE_BATTERY_COUNTER_LIMIT (CRITICAL_VOLTAGE_BATTERY_HYSTERESIS_TIME_MS*COMMANDER_MONITORING_LOOPSPERMSEC)
#define STICK_ON_OFF_LIMIT 0.75f
#define STICK_THRUST_RANGE 1.0f
#define STICK_ON_OFF_HYSTERESIS_TIME_MS 1000
#define STICK_ON_OFF_COUNTER_LIMIT (STICK_ON_OFF_HYSTERESIS_TIME_MS*COMMANDER_MONITORING_LOOPSPERMSEC)
#define POSITION_TIMEOUT 1000000 /**< consider the local or global position estimate invalid after 1s */
#define RC_TIMEOUT 100000
#define DIFFPRESS_TIMEOUT 2000000
#define PRINT_INTERVAL 5000000
#define PRINT_MODE_REJECT_INTERVAL 2000000
enum MAV_MODE_FLAG {
MAV_MODE_FLAG_CUSTOM_MODE_ENABLED = 1, /* 0b00000001 Reserved for future use. | */
MAV_MODE_FLAG_TEST_ENABLED = 2, /* 0b00000010 system has a test mode enabled. This flag is intended for temporary system tests and should not be used for stable implementations. | */
MAV_MODE_FLAG_AUTO_ENABLED = 4, /* 0b00000100 autonomous mode enabled, system finds its own goal positions. Guided flag can be set or not, depends on the actual implementation. | */
MAV_MODE_FLAG_GUIDED_ENABLED = 8, /* 0b00001000 guided mode enabled, system flies MISSIONs / mission items. | */
MAV_MODE_FLAG_STABILIZE_ENABLED = 16, /* 0b00010000 system stabilizes electronically its attitude (and optionally position). It needs however further control inputs to move around. | */
MAV_MODE_FLAG_HIL_ENABLED = 32, /* 0b00100000 hardware in the loop simulation. All motors / actuators are blocked, but internal software is full operational. | */
MAV_MODE_FLAG_MANUAL_INPUT_ENABLED = 64, /* 0b01000000 remote control input is enabled. | */
MAV_MODE_FLAG_SAFETY_ARMED = 128, /* 0b10000000 MAV safety set to armed. Motors are enabled / running / can start. Ready to fly. | */
MAV_MODE_FLAG_ENUM_END = 129, /* | */
};
/* Mavlink file descriptors */
static int mavlink_fd;
/* flags */
static bool commander_initialized = false;
static bool thread_should_exit = false; /**< daemon exit flag */
static bool thread_running = false; /**< daemon status flag */
static int daemon_task; /**< Handle of daemon task / thread */
static unsigned int leds_counter;
/* To remember when last notification was sent */
static uint64_t last_print_mode_reject_time = 0;
/* if connected via USB */
static bool on_usb_power = false;
static float takeoff_alt = 5.0f;
/* tasks waiting for low prio thread */
typedef enum {
LOW_PRIO_TASK_NONE = 0,
LOW_PRIO_TASK_PARAM_SAVE,
LOW_PRIO_TASK_PARAM_LOAD,
LOW_PRIO_TASK_GYRO_CALIBRATION,
LOW_PRIO_TASK_MAG_CALIBRATION,
LOW_PRIO_TASK_ALTITUDE_CALIBRATION,
LOW_PRIO_TASK_RC_CALIBRATION,
LOW_PRIO_TASK_ACCEL_CALIBRATION,
LOW_PRIO_TASK_AIRSPEED_CALIBRATION
} low_prio_task_t;
static low_prio_task_t low_prio_task = LOW_PRIO_TASK_NONE;
/**
* The daemon 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_create().
*
* @ingroup apps
*/
extern "C" __EXPORT int commander_main(int argc, char *argv[]);
/**
* Print the correct usage.
*/
void usage(const char *reason);
/**
* React to commands that are sent e.g. from the mavlink module.
*/
void handle_command(struct vehicle_status_s *status, struct vehicle_control_mode_s *control_mode, struct vehicle_command_s *cmd, struct actuator_armed_s *armed);
/**
* Mainloop of commander.
*/
int commander_thread_main(int argc, char *argv[]);
void toggle_status_leds(vehicle_status_s *status, actuator_armed_s *armed, bool changed);
void check_valid(hrt_abstime timestamp, hrt_abstime timeout, bool valid_in, bool *valid_out, bool *changed);
void check_mode_switches(struct manual_control_setpoint_s *sp_man, struct vehicle_status_s *current_status);
transition_result_t check_main_state_machine(struct vehicle_status_s *current_status);
void print_reject_mode(const char *msg);
void print_reject_arm(const char *msg);
void print_status();
transition_result_t check_navigation_state_machine(struct vehicle_status_s *status, struct vehicle_control_mode_s *control_mode, struct vehicle_local_position_s *local_pos);
/**
* Loop that runs at a lower rate and priority for calibration and parameter tasks.
*/
void *commander_low_prio_loop(void *arg);
void answer_command(struct vehicle_command_s &cmd, enum VEHICLE_CMD_RESULT result);
int commander_main(int argc, char *argv[])
{
if (argc < 1)
usage("missing command");
if (!strcmp(argv[1], "start")) {
if (thread_running) {
warnx("commander already running\n");
/* this is not an error */
exit(0);
}
thread_should_exit = false;
daemon_task = task_spawn_cmd("commander",
SCHED_DEFAULT,
SCHED_PRIORITY_MAX - 40,
3000,
commander_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) {
warnx("\tcommander is running\n");
print_status();
} else {
warnx("\tcommander not started\n");
}
exit(0);
}
usage("unrecognized command");
exit(1);
}
void usage(const char *reason)
{
if (reason)
fprintf(stderr, "%s\n", reason);
fprintf(stderr, "usage: daemon {start|stop|status} [-p <additional params>]\n\n");
exit(1);
}
void print_status()
{
warnx("usb powered: %s", (on_usb_power) ? "yes" : "no");
/* read all relevant states */
int state_sub = orb_subscribe(ORB_ID(vehicle_status));
struct vehicle_status_s state;
orb_copy(ORB_ID(vehicle_status), state_sub, &state);
const char *armed_str;
switch (state.arming_state) {
case ARMING_STATE_INIT:
armed_str = "INIT";
break;
case ARMING_STATE_STANDBY:
armed_str = "STANDBY";
break;
case ARMING_STATE_ARMED:
armed_str = "ARMED";
break;
case ARMING_STATE_ARMED_ERROR:
armed_str = "ARMED_ERROR";
break;
case ARMING_STATE_STANDBY_ERROR:
armed_str = "STANDBY_ERROR";
break;
case ARMING_STATE_REBOOT:
armed_str = "REBOOT";
break;
case ARMING_STATE_IN_AIR_RESTORE:
armed_str = "IN_AIR_RESTORE";
break;
default:
armed_str = "ERR: UNKNOWN STATE";
break;
}
close(state_sub);
warnx("arming: %s", armed_str);
}
void handle_command(struct vehicle_status_s *status, const struct safety_s *safety, struct vehicle_control_mode_s *control_mode, struct vehicle_command_s *cmd, struct actuator_armed_s *armed)
{
/* result of the command */
uint8_t result = VEHICLE_CMD_RESULT_UNSUPPORTED;
/* only handle high-priority commands here */
/* request to set different system mode */
switch (cmd->command) {
case VEHICLE_CMD_DO_SET_MODE: {
uint8_t base_mode = (uint8_t) cmd->param1;
uint8_t custom_main_mode = (uint8_t) cmd->param2;
// TODO remove debug code
//mavlink_log_critical(mavlink_fd, "[cmd] command setmode: %d %d", base_mode, custom_main_mode);
/* set arming state */
transition_result_t arming_res = TRANSITION_NOT_CHANGED;
if (base_mode & MAV_MODE_FLAG_SAFETY_ARMED) {
arming_res = arming_state_transition(status, safety, ARMING_STATE_ARMED, armed);
if (arming_res == TRANSITION_CHANGED) {
mavlink_log_info(mavlink_fd, "[cmd] ARMED by command");
}
} else {
if (status->arming_state == ARMING_STATE_ARMED || status->arming_state == ARMING_STATE_ARMED_ERROR) {
arming_state_t new_arming_state = (status->arming_state == ARMING_STATE_ARMED ? ARMING_STATE_STANDBY : ARMING_STATE_STANDBY_ERROR);
arming_res = arming_state_transition(status, safety, new_arming_state, armed);
if (arming_res == TRANSITION_CHANGED) {
mavlink_log_info(mavlink_fd, "[cmd] DISARMED by command");
}
} else {
arming_res = TRANSITION_NOT_CHANGED;
}
}
/* set main state */
transition_result_t main_res = TRANSITION_DENIED;
if (base_mode & MAV_MODE_FLAG_CUSTOM_MODE_ENABLED) {
/* use autopilot-specific mode */
if (custom_main_mode == PX4_CUSTOM_MAIN_MODE_MANUAL) {
/* MANUAL */
main_res = main_state_transition(status, MAIN_STATE_MANUAL);
} else if (custom_main_mode == PX4_CUSTOM_MAIN_MODE_SEATBELT) {
/* SEATBELT */
main_res = main_state_transition(status, MAIN_STATE_SEATBELT);
} else if (custom_main_mode == PX4_CUSTOM_MAIN_MODE_EASY) {
/* EASY */
main_res = main_state_transition(status, MAIN_STATE_EASY);
} else if (custom_main_mode == PX4_CUSTOM_MAIN_MODE_AUTO) {
/* AUTO */
main_res = main_state_transition(status, MAIN_STATE_AUTO);
}
} else {
/* use base mode */
if (base_mode & MAV_MODE_FLAG_AUTO_ENABLED) {
/* AUTO */
main_res = main_state_transition(status, MAIN_STATE_AUTO);
} else if (base_mode & MAV_MODE_FLAG_MANUAL_INPUT_ENABLED) {
if (base_mode & MAV_MODE_FLAG_GUIDED_ENABLED) {
/* EASY */
main_res = main_state_transition(status, MAIN_STATE_EASY);
} else if (base_mode & MAV_MODE_FLAG_STABILIZE_ENABLED) {
/* MANUAL */
main_res = main_state_transition(status, MAIN_STATE_MANUAL);
}
}
}
if (arming_res != TRANSITION_DENIED && main_res != TRANSITION_DENIED) {
result = VEHICLE_CMD_RESULT_ACCEPTED;
} else {
result = VEHICLE_CMD_RESULT_TEMPORARILY_REJECTED;
}
break;
}
case VEHICLE_CMD_NAV_TAKEOFF: {
if (armed->armed) {
transition_result_t nav_res = navigation_state_transition(status, NAVIGATION_STATE_AUTO_TAKEOFF, control_mode);
if (nav_res == TRANSITION_CHANGED) {
mavlink_log_info(mavlink_fd, "[cmd] TAKEOFF on command");
}
if (nav_res != TRANSITION_DENIED) {
result = VEHICLE_CMD_RESULT_ACCEPTED;
} else {
result = VEHICLE_CMD_RESULT_TEMPORARILY_REJECTED;
}
} else {
/* reject TAKEOFF not armed */
result = VEHICLE_CMD_RESULT_TEMPORARILY_REJECTED;
}
break;
}
case VEHICLE_CMD_COMPONENT_ARM_DISARM:
// XXX implement later
result = VEHICLE_CMD_RESULT_DENIED;
break;
default:
break;
}
/* supported command handling stop */
if (result == VEHICLE_CMD_RESULT_ACCEPTED) {
tune_positive();
} else if (result == VEHICLE_CMD_RESULT_UNSUPPORTED) {
/* we do not care in the high prio loop about commands we don't know */
} else {
tune_negative();
if (result == VEHICLE_CMD_RESULT_DENIED) {
mavlink_log_critical(mavlink_fd, "[cmd] command denied: %u", cmd->command);
} else if (result == VEHICLE_CMD_RESULT_FAILED) {
mavlink_log_critical(mavlink_fd, "[cmd] command failed: %u", cmd->command);
} else if (result == VEHICLE_CMD_RESULT_TEMPORARILY_REJECTED) {
mavlink_log_critical(mavlink_fd, "[cmd] command temporarily rejected: %u", cmd->command);
}
}
/* send any requested ACKs */
if (cmd->confirmation > 0 && result != VEHICLE_CMD_RESULT_UNSUPPORTED) {
/* send acknowledge command */
// XXX TODO
}
}
static struct vehicle_status_s status;
/* armed topic */
static struct actuator_armed_s armed;
static struct safety_s safety;
int commander_thread_main(int argc, char *argv[])
{
/* not yet initialized */
commander_initialized = false;
bool home_position_set = false;
bool battery_tune_played = false;
bool arm_tune_played = false;
/* set parameters */
param_t _param_sys_type = param_find("MAV_TYPE");
param_t _param_system_id = param_find("MAV_SYS_ID");
param_t _param_component_id = param_find("MAV_COMP_ID");
param_t _param_takeoff_alt = param_find("NAV_TAKEOFF_ALT");
/* welcome user */
warnx("starting");
/* pthread for slow low prio thread */
pthread_t commander_low_prio_thread;
/* initialize */
if (led_init() != 0) {
warnx("ERROR: Failed to initialize leds");
}
if (buzzer_init() != OK) {
warnx("ERROR: Failed to initialize buzzer");
}
mavlink_fd = open(MAVLINK_LOG_DEVICE, 0);
if (mavlink_fd < 0) {
/* try again later */
usleep(20000);
mavlink_fd = open(MAVLINK_LOG_DEVICE, 0);
if (mavlink_fd < 0) {
warnx("ERROR: Failed to open MAVLink log stream again, start mavlink app first.");
}
}
/* Main state machine */
orb_advert_t status_pub;
/* make sure we are in preflight state */
memset(&status, 0, sizeof(status));
status.condition_landed = true; // initialize to safe value
/* armed topic */
orb_advert_t armed_pub;
/* Initialize armed with all false */
memset(&armed, 0, sizeof(armed));
/* flags for control apps */
struct vehicle_control_mode_s control_mode;
orb_advert_t control_mode_pub;
/* Initialize all flags to false */
memset(&control_mode, 0, sizeof(control_mode));
status.main_state = MAIN_STATE_MANUAL;
status.navigation_state = NAVIGATION_STATE_DIRECT;
status.arming_state = ARMING_STATE_INIT;
status.hil_state = HIL_STATE_OFF;
/* neither manual nor offboard control commands have been received */
status.offboard_control_signal_found_once = false;
status.rc_signal_found_once = false;
/* mark all signals lost as long as they haven't been found */
status.rc_signal_lost = true;
status.offboard_control_signal_lost = true;
/* allow manual override initially */
control_mode.flag_external_manual_override_ok = true;
/* set battery warning flag */
status.battery_warning = VEHICLE_BATTERY_WARNING_NONE;
status.condition_battery_voltage_valid = false;
// XXX for now just set sensors as initialized
status.condition_system_sensors_initialized = true;
// XXX just disable offboard control for now
control_mode.flag_control_offboard_enabled = false;
/* advertise to ORB */
status_pub = orb_advertise(ORB_ID(vehicle_status), &status);
/* publish current state machine */
/* publish initial state */
status.counter++;
status.timestamp = hrt_absolute_time();
orb_publish(ORB_ID(vehicle_status), status_pub, &status);
armed_pub = orb_advertise(ORB_ID(actuator_armed), &armed);
control_mode_pub = orb_advertise(ORB_ID(vehicle_control_mode), &control_mode);
/* home position */
orb_advert_t home_pub = -1;
struct home_position_s home;
memset(&home, 0, sizeof(home));
if (status_pub < 0) {
warnx("ERROR: orb_advertise for topic vehicle_status failed (uorb app running?).\n");
warnx("exiting.");
exit(ERROR);
}
mavlink_log_info(mavlink_fd, "[cmd] started");
pthread_attr_t commander_low_prio_attr;
pthread_attr_init(&commander_low_prio_attr);
pthread_attr_setstacksize(&commander_low_prio_attr, 2992);
struct sched_param param;
(void)pthread_attr_getschedparam(&commander_low_prio_attr, &param);
/* low priority */
param.sched_priority = SCHED_PRIORITY_DEFAULT - 50;
(void)pthread_attr_setschedparam(&commander_low_prio_attr, &param);
pthread_create(&commander_low_prio_thread, &commander_low_prio_attr, commander_low_prio_loop, NULL);
/* Start monitoring loop */
unsigned counter = 0;
unsigned low_voltage_counter = 0;
unsigned critical_voltage_counter = 0;
unsigned stick_off_counter = 0;
unsigned stick_on_counter = 0;
bool low_battery_voltage_actions_done = false;
bool critical_battery_voltage_actions_done = false;
uint64_t last_idle_time = 0;
uint64_t start_time = 0;
bool status_changed = true;
bool param_init_forced = true;
bool updated = false;
bool rc_calibration_ok = (OK == rc_calibration_check());
/* Subscribe to safety topic */
int safety_sub = orb_subscribe(ORB_ID(safety));
memset(&safety, 0, sizeof(safety));
safety.safety_switch_available = false;
safety.safety_off = false;
/* Subscribe to manual control data */
int sp_man_sub = orb_subscribe(ORB_ID(manual_control_setpoint));
struct manual_control_setpoint_s sp_man;
memset(&sp_man, 0, sizeof(sp_man));
/* Subscribe to offboard control data */
int sp_offboard_sub = orb_subscribe(ORB_ID(offboard_control_setpoint));
struct offboard_control_setpoint_s sp_offboard;
memset(&sp_offboard, 0, sizeof(sp_offboard));
/* Subscribe to global position */
int global_position_sub = orb_subscribe(ORB_ID(vehicle_global_position));
struct vehicle_global_position_s global_position;
memset(&global_position, 0, sizeof(global_position));
/* Subscribe to local position data */
int local_position_sub = orb_subscribe(ORB_ID(vehicle_local_position));
struct vehicle_local_position_s local_position;
memset(&local_position, 0, sizeof(local_position));
/*
* The home position is set based on GPS only, to prevent a dependency between
* position estimator and commander. RAW GPS is more than good enough for a
* non-flying vehicle.
*/
/* Subscribe to GPS topic */
int gps_sub = orb_subscribe(ORB_ID(vehicle_gps_position));
struct vehicle_gps_position_s gps_position;
memset(&gps_position, 0, sizeof(gps_position));
/* Subscribe to sensor topic */
int sensor_sub = orb_subscribe(ORB_ID(sensor_combined));
struct sensor_combined_s sensors;
memset(&sensors, 0, sizeof(sensors));
/* Subscribe to differential pressure topic */
int diff_pres_sub = orb_subscribe(ORB_ID(differential_pressure));
struct differential_pressure_s diff_pres;
memset(&diff_pres, 0, sizeof(diff_pres));
/* Subscribe to command topic */
int cmd_sub = orb_subscribe(ORB_ID(vehicle_command));
struct vehicle_command_s cmd;
memset(&cmd, 0, sizeof(cmd));
/* Subscribe to parameters changed topic */
int param_changed_sub = orb_subscribe(ORB_ID(parameter_update));
struct parameter_update_s param_changed;
memset(&param_changed, 0, sizeof(param_changed));
/* Subscribe to battery topic */
int battery_sub = orb_subscribe(ORB_ID(battery_status));
struct battery_status_s battery;
memset(&battery, 0, sizeof(battery));
battery.voltage_v = 0.0f;
/* Subscribe to subsystem info topic */
int subsys_sub = orb_subscribe(ORB_ID(subsystem_info));
struct subsystem_info_s info;
memset(&info, 0, sizeof(info));
toggle_status_leds(&status, &armed, true);
/* now initialized */
commander_initialized = true;
thread_running = true;
start_time = hrt_absolute_time();
while (!thread_should_exit) {
/* update parameters */
orb_check(param_changed_sub, &updated);
if (updated || param_init_forced) {
param_init_forced = false;
/* parameters changed */
orb_copy(ORB_ID(parameter_update), param_changed_sub, &param_changed);
/* update parameters */
if (!armed.armed) {
if (param_get(_param_sys_type, &(status.system_type)) != OK) {
warnx("failed getting new system type");
}
/* disable manual override for all systems that rely on electronic stabilization */
if (status.system_type == VEHICLE_TYPE_COAXIAL ||
status.system_type == VEHICLE_TYPE_HELICOPTER ||
status.system_type == VEHICLE_TYPE_TRICOPTER ||
status.system_type == VEHICLE_TYPE_QUADROTOR ||
status.system_type == VEHICLE_TYPE_HEXAROTOR ||
status.system_type == VEHICLE_TYPE_OCTOROTOR) {
control_mode.flag_external_manual_override_ok = false;
status.is_rotary_wing = true;
} else {
control_mode.flag_external_manual_override_ok = true;
status.is_rotary_wing = false;
}
/* check and update system / component ID */
param_get(_param_system_id, &(status.system_id));
param_get(_param_component_id, &(status.component_id));
status_changed = true;
/* re-check RC calibration */
rc_calibration_ok = (OK == rc_calibration_check());
/* navigation parameters */
param_get(_param_takeoff_alt, &takeoff_alt);
}
}
orb_check(sp_man_sub, &updated);
if (updated) {
orb_copy(ORB_ID(manual_control_setpoint), sp_man_sub, &sp_man);
}
orb_check(sp_offboard_sub, &updated);
if (updated) {
orb_copy(ORB_ID(offboard_control_setpoint), sp_offboard_sub, &sp_offboard);
}
orb_check(sensor_sub, &updated);
if (updated) {
orb_copy(ORB_ID(sensor_combined), sensor_sub, &sensors);
}
orb_check(diff_pres_sub, &updated);
if (updated) {
orb_copy(ORB_ID(differential_pressure), diff_pres_sub, &diff_pres);
}
check_valid(diff_pres.timestamp, DIFFPRESS_TIMEOUT, true, &(status.condition_airspeed_valid), &status_changed);
orb_check(cmd_sub, &updated);
if (updated) {
/* got command */
orb_copy(ORB_ID(vehicle_command), cmd_sub, &cmd);
/* handle it */
handle_command(&status, &safety, &control_mode, &cmd, &armed);
}
/* update safety topic */
orb_check(safety_sub, &updated);
if (updated) {
orb_copy(ORB_ID(safety), safety_sub, &safety);
}
/* update global position estimate */
orb_check(global_position_sub, &updated);
if (updated) {
/* position changed */
orb_copy(ORB_ID(vehicle_global_position), global_position_sub, &global_position);
}
/* update condition_global_position_valid */
check_valid(global_position.timestamp, POSITION_TIMEOUT, global_position.valid, &(status.condition_global_position_valid), &status_changed);
/* update local position estimate */
orb_check(local_position_sub, &updated);
if (updated) {
/* position changed */
orb_copy(ORB_ID(vehicle_local_position), local_position_sub, &local_position);
}
/* update condition_local_position_valid and condition_local_altitude_valid */
check_valid(local_position.timestamp, POSITION_TIMEOUT, local_position.xy_valid, &(status.condition_local_position_valid), &status_changed);
check_valid(local_position.timestamp, POSITION_TIMEOUT, local_position.z_valid, &(status.condition_local_altitude_valid), &status_changed);
if (status.condition_local_altitude_valid) {
if (status.condition_landed != local_position.landed) {
status.condition_landed = local_position.landed;
status_changed = true;
if (status.condition_landed) {
mavlink_log_critical(mavlink_fd, "[cmd] LANDED");
} else {
mavlink_log_critical(mavlink_fd, "[cmd] IN AIR");
}
}
}
/* update battery status */
orb_check(battery_sub, &updated);
if (updated) {
orb_copy(ORB_ID(battery_status), battery_sub, &battery);
// warnx("bat v: %2.2f", battery.voltage_v);
/* only consider battery voltage if system has been running 2s and battery voltage is not 0 */
if (hrt_absolute_time() > start_time + 2000000 && battery.voltage_v > 0.001f) {
status.battery_voltage = battery.voltage_v;
status.condition_battery_voltage_valid = true;
status.battery_remaining = battery_remaining_estimate_voltage(status.battery_voltage);
}
}
/* update subsystem */
orb_check(subsys_sub, &updated);
if (updated) {
orb_copy(ORB_ID(subsystem_info), subsys_sub, &info);
warnx("subsystem changed: %d\n", (int)info.subsystem_type);
/* mark / unmark as present */
if (info.present) {
status.onboard_control_sensors_present |= info.subsystem_type;
} else {
status.onboard_control_sensors_present &= ~info.subsystem_type;
}
/* mark / unmark as enabled */
if (info.enabled) {
status.onboard_control_sensors_enabled |= info.subsystem_type;
} else {
status.onboard_control_sensors_enabled &= ~info.subsystem_type;
}
/* mark / unmark as ok */
if (info.ok) {
status.onboard_control_sensors_health |= info.subsystem_type;
} else {
status.onboard_control_sensors_health &= ~info.subsystem_type;
}
status_changed = true;
}
if (counter % (1000000 / COMMANDER_MONITORING_INTERVAL) == 0) {
/* compute system load */
uint64_t interval_runtime = system_load.tasks[0].total_runtime - last_idle_time;
if (last_idle_time > 0)
status.load = 1.0f - ((float)interval_runtime / 1e6f); //system load is time spent in non-idle
last_idle_time = system_load.tasks[0].total_runtime;
/* check if board is connected via USB */
struct stat statbuf;
//on_usb_power = (stat("/dev/ttyACM0", &statbuf) == 0);
}
// XXX remove later
//warnx("bat remaining: %2.2f", status.battery_remaining);
/* if battery voltage is getting lower, warn using buzzer, etc. */
if (status.condition_battery_voltage_valid && status.battery_remaining < 0.25f && !low_battery_voltage_actions_done) {
//TODO: add filter, or call emergency after n measurements < VOLTAGE_BATTERY_MINIMAL_MILLIVOLTS
if (low_voltage_counter > LOW_VOLTAGE_BATTERY_COUNTER_LIMIT) {
low_battery_voltage_actions_done = true;
mavlink_log_critical(mavlink_fd, "[cmd] WARNING: LOW BATTERY");
status.battery_warning = VEHICLE_BATTERY_WARNING_LOW;
status_changed = true;
battery_tune_played = false;
}
low_voltage_counter++;
} else if (status.condition_battery_voltage_valid && status.battery_remaining < 0.1f && !critical_battery_voltage_actions_done && low_battery_voltage_actions_done) {
/* critical battery voltage, this is rather an emergency, change state machine */
if (critical_voltage_counter > CRITICAL_VOLTAGE_BATTERY_COUNTER_LIMIT) {
critical_battery_voltage_actions_done = true;
mavlink_log_critical(mavlink_fd, "[cmd] EMERGENCY: CRITICAL BATTERY");
status.battery_warning = VEHICLE_BATTERY_WARNING_CRITICAL;
battery_tune_played = false;
if (armed.armed) {
// XXX not sure what should happen when voltage is low in flight
//arming_state_transition(&status, &safety, ARMING_STATE_ARMED_ERROR, &armed);
} else {
// XXX should we still allow to arm with critical battery?
//arming_state_transition(&status, &safety, ARMING_STATE_STANDBY_ERROR, &armed);
}
status_changed = true;
}
critical_voltage_counter++;
} else {
low_voltage_counter = 0;
critical_voltage_counter = 0;
}
/* End battery voltage check */
/* If in INIT state, try to proceed to STANDBY state */
if (status.arming_state == ARMING_STATE_INIT && low_prio_task == LOW_PRIO_TASK_NONE) {
// XXX check for sensors
arming_state_transition(&status, &safety, ARMING_STATE_STANDBY, &armed);
} else {
// XXX: Add emergency stuff if sensors are lost
}
/*
* Check for valid position information.
*
* If the system has a valid position source from an onboard
* position estimator, it is safe to operate it autonomously.
* The flag_vector_flight_mode_ok flag indicates that a minimum
* set of position measurements is available.
*/
orb_check(gps_sub, &updated);
if (updated) {
orb_copy(ORB_ID(vehicle_gps_position), gps_sub, &gps_position);
/* check if GPS fix is ok */
float hdop_threshold_m = 4.0f;
float vdop_threshold_m = 8.0f;
/*
* If horizontal dilution of precision (hdop / eph)
* and vertical diluation of precision (vdop / epv)
* are below a certain threshold (e.g. 4 m), AND
* home position is not yet set AND the last GPS
* GPS measurement is not older than two seconds AND
* the system is currently not armed, set home
* position to the current position.
*/
if (!home_position_set && gps_position.fix_type >= 3 &&
(gps_position.eph_m < hdop_threshold_m) && (gps_position.epv_m < vdop_threshold_m) && // XXX note that vdop is 0 for mtk
(hrt_absolute_time() < gps_position.timestamp_position + POSITION_TIMEOUT) && !armed.armed) {
/* copy position data to uORB home message, store it locally as well */
// TODO use global position estimate
home.lat = gps_position.lat;
home.lon = gps_position.lon;
home.alt = gps_position.alt;
home.eph_m = gps_position.eph_m;
home.epv_m = gps_position.epv_m;
home.s_variance_m_s = gps_position.s_variance_m_s;
home.p_variance_m = gps_position.p_variance_m;
double home_lat_d = home.lat * 1e-7;
double home_lon_d = home.lon * 1e-7;
warnx("home: lat = %.7f, lon = %.7f", home_lat_d, home_lon_d);
mavlink_log_info(mavlink_fd, "[cmd] home: %.7f, %.7f", home_lat_d, home_lon_d);
/* announce new home position */
if (home_pub > 0) {
orb_publish(ORB_ID(home_position), home_pub, &home);
} else {
home_pub = orb_advertise(ORB_ID(home_position), &home);
}
/* mark home position as set */
home_position_set = true;
tune_positive();
}
}
/* ignore RC signals if in offboard control mode */
if (!status.offboard_control_signal_found_once && sp_man.timestamp != 0) {
/* start RC input check */
if (hrt_absolute_time() < sp_man.timestamp + RC_TIMEOUT) {
/* handle the case where RC signal was regained */
if (!status.rc_signal_found_once) {
status.rc_signal_found_once = true;
mavlink_log_critical(mavlink_fd, "[cmd] detected RC signal first time");
status_changed = true;
} else {
if (status.rc_signal_lost) {
mavlink_log_critical(mavlink_fd, "[cmd] RC signal regained");
status_changed = true;
}
}
status.rc_signal_lost = false;
transition_result_t res; // store all transitions results here
/* arm/disarm by RC */
res = TRANSITION_NOT_CHANGED;
/* check if left stick is in lower left position and we are in MANUAL or AUTO_READY mode or (ASSISTED mode and landed) -> disarm
* do it only for rotary wings */
if (status.is_rotary_wing &&
(status.arming_state == ARMING_STATE_ARMED || status.arming_state == ARMING_STATE_ARMED_ERROR) &&
(status.main_state == MAIN_STATE_MANUAL || status.navigation_state == NAVIGATION_STATE_AUTO_READY ||
(status.condition_landed && (
status.navigation_state == NAVIGATION_STATE_ALTHOLD ||
status.navigation_state == NAVIGATION_STATE_VECTOR
))) && sp_man.yaw < -STICK_ON_OFF_LIMIT && sp_man.throttle < STICK_THRUST_RANGE * 0.1f) {
if (stick_off_counter > STICK_ON_OFF_COUNTER_LIMIT) {
/* disarm to STANDBY if ARMED or to STANDBY_ERROR if ARMED_ERROR */
arming_state_t new_arming_state = (status.arming_state == ARMING_STATE_ARMED ? ARMING_STATE_STANDBY : ARMING_STATE_STANDBY_ERROR);
res = arming_state_transition(&status, &safety, new_arming_state, &armed);
stick_off_counter = 0;
} else {
stick_off_counter++;
}
} else {
stick_off_counter = 0;
}
/* check if left stick is in lower right position and we're in MANUAL mode -> arm */
if (status.arming_state == ARMING_STATE_STANDBY &&
status.main_state == MAIN_STATE_MANUAL &&
sp_man.yaw > STICK_ON_OFF_LIMIT && sp_man.throttle < STICK_THRUST_RANGE * 0.1f) {
if (stick_on_counter > STICK_ON_OFF_COUNTER_LIMIT) {
res = arming_state_transition(&status, &safety, ARMING_STATE_ARMED, &armed);
stick_on_counter = 0;
} else {
stick_on_counter++;
}
} else {
stick_on_counter = 0;
}
if (res == TRANSITION_CHANGED) {
if (status.arming_state == ARMING_STATE_ARMED) {
mavlink_log_info(mavlink_fd, "[cmd] ARMED by RC");
} else {
mavlink_log_info(mavlink_fd, "[cmd] DISARMED by RC");
}
} else if (res == TRANSITION_DENIED) {
/* DENIED here indicates safety switch not pressed */
if (!(!safety.safety_switch_available || safety.safety_off)) {
print_reject_arm("NOT ARMING: Press safety switch first.");
} else {
warnx("ERROR: main denied: arm %d main %d mode_sw %d", status.arming_state, status.main_state, status.mode_switch);
mavlink_log_critical(mavlink_fd, "[cmd] ERROR: main denied: arm %d main %d mode_sw %d", status.arming_state, status.main_state, status.mode_switch);
}
}
/* fill current_status according to mode switches */
check_mode_switches(&sp_man, &status);
/* evaluate the main state machine */
res = check_main_state_machine(&status);
if (res == TRANSITION_CHANGED) {
//mavlink_log_info(mavlink_fd, "[cmd] main state: %d", status.main_state);
tune_positive();
} else if (res == TRANSITION_DENIED) {
/* DENIED here indicates bug in the commander */
warnx("ERROR: main denied: arm %d main %d mode_sw %d", status.arming_state, status.main_state, status.mode_switch);
mavlink_log_critical(mavlink_fd, "[cmd] ERROR: main denied: arm %d main %d mode_sw %d", status.arming_state, status.main_state, status.mode_switch);
}
} else {
if (!status.rc_signal_lost) {
mavlink_log_critical(mavlink_fd, "[cmd] CRITICAL: RC SIGNAL LOST");
status.rc_signal_lost = true;
status_changed = true;
}
}
}
/* evaluate the navigation state machine */
transition_result_t res = check_navigation_state_machine(&status, &control_mode, &local_position);
if (res == TRANSITION_DENIED) {
/* DENIED here indicates bug in the commander */
warnx("ERROR: nav denied: arm %d main %d nav %d", status.arming_state, status.main_state, status.navigation_state);
mavlink_log_critical(mavlink_fd, "[cmd] ERROR: nav denied: arm %d main %d nav %d", status.arming_state, status.main_state, status.navigation_state);
}
/* check which state machines for changes, clear "changed" flag */
bool arming_state_changed = check_arming_state_changed();
bool main_state_changed = check_main_state_changed();
bool navigation_state_changed = check_navigation_state_changed();
if (arming_state_changed || main_state_changed || navigation_state_changed) {
mavlink_log_info(mavlink_fd, "[cmd] state: arm %d, main %d, nav %d", status.arming_state, status.main_state, status.navigation_state);
status_changed = true;
} else {
status_changed = false;
}
hrt_abstime t1 = hrt_absolute_time();
/* publish arming state */
if (arming_state_changed) {
armed.timestamp = t1;
orb_publish(ORB_ID(actuator_armed), armed_pub, &armed);
}
/* publish control mode */
if (navigation_state_changed || arming_state_changed) {
/* publish new navigation state */
control_mode.flag_armed = armed.armed; // copy armed state to vehicle_control_mode topic
control_mode.counter++;
control_mode.timestamp = t1;
orb_publish(ORB_ID(vehicle_control_mode), control_mode_pub, &control_mode);
}
/* publish states (armed, control mode, vehicle status) at least with 5 Hz */
if (counter % (200000 / COMMANDER_MONITORING_INTERVAL) == 0 || status_changed) {
status.counter++;
status.timestamp = t1;
orb_publish(ORB_ID(vehicle_status), status_pub, &status);
control_mode.timestamp = t1;
orb_publish(ORB_ID(vehicle_control_mode), control_mode_pub, &control_mode);
armed.timestamp = t1;
orb_publish(ORB_ID(actuator_armed), armed_pub, &armed);
}
/* play arming and battery warning tunes */
if (!arm_tune_played && armed.armed) {
/* play tune when armed */
if (tune_arm() == OK)
arm_tune_played = true;
} else if (status.battery_warning == VEHICLE_BATTERY_WARNING_LOW) {
/* play tune on battery warning */
if (tune_low_bat() == OK)
battery_tune_played = true;
} else if (status.battery_warning == VEHICLE_BATTERY_WARNING_CRITICAL) {
/* play tune on battery critical */
if (tune_critical_bat() == OK)
battery_tune_played = true;
} else if (battery_tune_played) {
tune_stop();
battery_tune_played = false;
}
/* reset arm_tune_played when disarmed */
if (!(armed.armed && (!safety.safety_switch_available || (safety.safety_off && safety.safety_switch_available)))) {
arm_tune_played = false;
}
fflush(stdout);
counter++;
toggle_status_leds(&status, &armed, arming_state_changed || status_changed);
usleep(COMMANDER_MONITORING_INTERVAL);
}
/* wait for threads to complete */
pthread_join(commander_low_prio_thread, NULL);
/* close fds */
led_deinit();
buzzer_deinit();
close(sp_man_sub);
close(sp_offboard_sub);
close(local_position_sub);
close(global_position_sub);
close(gps_sub);
close(sensor_sub);
close(safety_sub);
close(cmd_sub);
close(subsys_sub);
close(diff_pres_sub);
close(param_changed_sub);
close(battery_sub);
warnx("exiting");
fflush(stdout);
thread_running = false;
return 0;
}
void
check_valid(hrt_abstime timestamp, hrt_abstime timeout, bool valid_in, bool *valid_out, bool *changed)
{
hrt_abstime t = hrt_absolute_time();
bool valid_new = (t < timestamp + timeout && t > timeout && valid_in);
if (*valid_out != valid_new) {
*valid_out = valid_new;
*changed = true;
}
}
void
toggle_status_leds(vehicle_status_s *status, actuator_armed_s *armed, bool changed)
{
#ifdef CONFIG_ARCH_BOARD_PX4FMU_V1
/* this runs at around 20Hz, full cycle is 16 ticks = 10/16Hz */
if (armed->armed) {
/* armed, solid */
led_on(LED_BLUE);
} else if (armed->ready_to_arm) {
/* ready to arm, blink at 1Hz */
if (leds_counter % 20 == 0)
led_toggle(LED_BLUE);
} else {
/* not ready to arm, blink at 10Hz */
if (leds_counter % 2 == 0)
led_toggle(LED_BLUE);
}
#endif
if (changed) {
/* XXX TODO blink fast when armed and serious error occurs */
if (armed->armed) {
rgbled_set_mode(RGBLED_MODE_ON);
} else if (armed->ready_to_arm) {
rgbled_set_mode(RGBLED_MODE_BREATHE);
} else {
rgbled_set_mode(RGBLED_MODE_BLINK_FAST);
}
}
if (status->battery_warning != VEHICLE_BATTERY_WARNING_NONE) {
switch (status->battery_warning) {
case VEHICLE_BATTERY_WARNING_LOW:
rgbled_set_color(RGBLED_COLOR_YELLOW);
break;
case VEHICLE_BATTERY_WARNING_CRITICAL:
rgbled_set_color(RGBLED_COLOR_AMBER);
break;
default:
break;
}
} else {
switch (status->main_state) {
case MAIN_STATE_MANUAL:
rgbled_set_color(RGBLED_COLOR_WHITE);
break;
case MAIN_STATE_SEATBELT:
case MAIN_STATE_EASY:
rgbled_set_color(RGBLED_COLOR_GREEN);
break;
case MAIN_STATE_AUTO:
rgbled_set_color(RGBLED_COLOR_BLUE);
break;
default:
break;
}
}
/* give system warnings on error LED, XXX maybe add memory usage warning too */
if (status->load > 0.95f) {
if (leds_counter % 2 == 0)
led_toggle(LED_AMBER);
} else {
led_off(LED_AMBER);
}
leds_counter++;
}
void
check_mode_switches(struct manual_control_setpoint_s *sp_man, struct vehicle_status_s *current_status)
{
/* main mode switch */
if (!isfinite(sp_man->mode_switch)) {
warnx("mode sw not finite");
current_status->mode_switch = MODE_SWITCH_MANUAL;
} else if (sp_man->mode_switch > STICK_ON_OFF_LIMIT) {
current_status->mode_switch = MODE_SWITCH_AUTO;
} else if (sp_man->mode_switch < -STICK_ON_OFF_LIMIT) {
current_status->mode_switch = MODE_SWITCH_MANUAL;
} else {
current_status->mode_switch = MODE_SWITCH_ASSISTED;
}
/* land switch */
if (!isfinite(sp_man->return_switch)) {
current_status->return_switch = RETURN_SWITCH_NONE;
} else if (sp_man->return_switch > STICK_ON_OFF_LIMIT) {
current_status->return_switch = RETURN_SWITCH_RETURN;
} else {
current_status->return_switch = RETURN_SWITCH_NONE;
}
/* assisted switch */
if (!isfinite(sp_man->assisted_switch)) {
current_status->assisted_switch = ASSISTED_SWITCH_SEATBELT;
} else if (sp_man->assisted_switch > STICK_ON_OFF_LIMIT) {
current_status->assisted_switch = ASSISTED_SWITCH_EASY;
} else {
current_status->assisted_switch = ASSISTED_SWITCH_SEATBELT;
}
/* mission switch */
if (!isfinite(sp_man->mission_switch)) {
current_status->mission_switch = MISSION_SWITCH_MISSION;
} else if (sp_man->mission_switch > STICK_ON_OFF_LIMIT) {
current_status->mission_switch = MISSION_SWITCH_NONE;
} else {
current_status->mission_switch = MISSION_SWITCH_MISSION;
}
}
transition_result_t
check_main_state_machine(struct vehicle_status_s *current_status)
{
/* evaluate the main state machine */
transition_result_t res = TRANSITION_DENIED;
switch (current_status->mode_switch) {
case MODE_SWITCH_MANUAL:
res = main_state_transition(current_status, MAIN_STATE_MANUAL);
// TRANSITION_DENIED is not possible here
break;
case MODE_SWITCH_ASSISTED:
if (current_status->assisted_switch == ASSISTED_SWITCH_EASY) {
res = main_state_transition(current_status, MAIN_STATE_EASY);
if (res != TRANSITION_DENIED)
break; // changed successfully or already in this state
// else fallback to SEATBELT
print_reject_mode("EASY");
}
res = main_state_transition(current_status, MAIN_STATE_SEATBELT);
if (res != TRANSITION_DENIED)
break; // changed successfully or already in this mode
if (current_status->assisted_switch != ASSISTED_SWITCH_EASY) // don't print both messages
print_reject_mode("SEATBELT");
// else fallback to MANUAL
res = main_state_transition(current_status, MAIN_STATE_MANUAL);
// TRANSITION_DENIED is not possible here
break;
case MODE_SWITCH_AUTO:
res = main_state_transition(current_status, MAIN_STATE_AUTO);
if (res != TRANSITION_DENIED)
break; // changed successfully or already in this state
// else fallback to SEATBELT (EASY likely will not work too)
print_reject_mode("AUTO");
res = main_state_transition(current_status, MAIN_STATE_SEATBELT);
if (res != TRANSITION_DENIED)
break; // changed successfully or already in this state
// else fallback to MANUAL
res = main_state_transition(current_status, MAIN_STATE_MANUAL);
// TRANSITION_DENIED is not possible here
break;
default:
break;
}
return res;
}
void
print_reject_mode(const char *msg)
{
hrt_abstime t = hrt_absolute_time();
if (t - last_print_mode_reject_time > PRINT_MODE_REJECT_INTERVAL) {
last_print_mode_reject_time = t;
char s[80];
sprintf(s, "[cmd] WARNING: reject %s", msg);
mavlink_log_critical(mavlink_fd, s);
tune_negative();
}
}
void
print_reject_arm(const char *msg)
{
hrt_abstime t = hrt_absolute_time();
if (t - last_print_mode_reject_time > PRINT_MODE_REJECT_INTERVAL) {
last_print_mode_reject_time = t;
char s[80];
sprintf(s, "[cmd] %s", msg);
mavlink_log_critical(mavlink_fd, s);
tune_negative();
}
}
transition_result_t
check_navigation_state_machine(struct vehicle_status_s *status, struct vehicle_control_mode_s *control_mode, struct vehicle_local_position_s *local_pos)
{
transition_result_t res = TRANSITION_DENIED;
if (status->main_state == MAIN_STATE_AUTO) {
if (status->arming_state == ARMING_STATE_ARMED || status->arming_state == ARMING_STATE_ARMED_ERROR) {
// TODO AUTO_LAND handling
if (status->navigation_state == NAVIGATION_STATE_AUTO_TAKEOFF) {
/* don't switch to other states until takeoff not completed */
if (local_pos->z > -takeoff_alt || status->condition_landed) {
return TRANSITION_NOT_CHANGED;
}
}
if (status->navigation_state != NAVIGATION_STATE_AUTO_TAKEOFF &&
status->navigation_state != NAVIGATION_STATE_AUTO_LOITER &&
status->navigation_state != NAVIGATION_STATE_AUTO_MISSION &&
status->navigation_state != NAVIGATION_STATE_AUTO_RTL) {
/* possibly on ground, switch to TAKEOFF if needed */
if (local_pos->z > -takeoff_alt || status->condition_landed) {
res = navigation_state_transition(status, NAVIGATION_STATE_AUTO_TAKEOFF, control_mode);
return res;
}
}
/* switch to AUTO mode */
if (status->rc_signal_found_once && !status->rc_signal_lost) {
/* act depending on switches when manual control enabled */
if (status->return_switch == RETURN_SWITCH_RETURN) {
/* RTL */
res = navigation_state_transition(status, NAVIGATION_STATE_AUTO_RTL, control_mode);
} else {
if (status->mission_switch == MISSION_SWITCH_MISSION) {
/* MISSION */
res = navigation_state_transition(status, NAVIGATION_STATE_AUTO_MISSION, control_mode);
} else {
/* LOITER */
res = navigation_state_transition(status, NAVIGATION_STATE_AUTO_LOITER, control_mode);
}
}
} else {
/* switch to MISSION when no RC control and first time in some AUTO mode */
if (status->navigation_state == NAVIGATION_STATE_AUTO_LOITER ||
status->navigation_state == NAVIGATION_STATE_AUTO_MISSION ||
status->navigation_state == NAVIGATION_STATE_AUTO_RTL ||
status->navigation_state == NAVIGATION_STATE_AUTO_LAND) {
res = TRANSITION_NOT_CHANGED;
} else {
res = navigation_state_transition(status, NAVIGATION_STATE_AUTO_MISSION, control_mode);
}
}
} else {
/* disarmed, always switch to AUTO_READY */
res = navigation_state_transition(status, NAVIGATION_STATE_AUTO_READY, control_mode);
}
} else {
/* manual control modes */
if (status->rc_signal_lost && (status->arming_state == ARMING_STATE_ARMED || status->arming_state == ARMING_STATE_ARMED_ERROR)) {
/* switch to failsafe mode */
bool manual_control_old = control_mode->flag_control_manual_enabled;
if (!status->condition_landed) {
/* in air: try to hold position */
res = navigation_state_transition(status, NAVIGATION_STATE_VECTOR, control_mode);
} else {
/* landed: don't try to hold position but land (if taking off) */
res = TRANSITION_DENIED;
}
if (res == TRANSITION_DENIED) {
res = navigation_state_transition(status, NAVIGATION_STATE_ALTHOLD, control_mode);
}
control_mode->flag_control_manual_enabled = false;
if (res == TRANSITION_NOT_CHANGED && manual_control_old) {
/* mark navigation state as changed to force immediate flag publishing */
set_navigation_state_changed();
res = TRANSITION_CHANGED;
}
if (res == TRANSITION_CHANGED) {
if (control_mode->flag_control_position_enabled) {
mavlink_log_critical(mavlink_fd, "[cmd] FAILSAFE: POS HOLD");
} else {
if (status->condition_landed) {
mavlink_log_critical(mavlink_fd, "[cmd] FAILSAFE: ALT HOLD (LAND)");
} else {
mavlink_log_critical(mavlink_fd, "[cmd] FAILSAFE: ALT HOLD");
}
}
}
} else {
switch (status->main_state) {
case MAIN_STATE_MANUAL:
res = navigation_state_transition(status, status->is_rotary_wing ? NAVIGATION_STATE_STABILIZE : NAVIGATION_STATE_DIRECT, control_mode);
break;
case MAIN_STATE_SEATBELT:
res = navigation_state_transition(status, NAVIGATION_STATE_ALTHOLD, control_mode);
break;
case MAIN_STATE_EASY:
res = navigation_state_transition(status, NAVIGATION_STATE_VECTOR, control_mode);
break;
default:
break;
}
}
}
return res;
}
void answer_command(struct vehicle_command_s &cmd, enum VEHICLE_CMD_RESULT result)
{
switch (result) {
case VEHICLE_CMD_RESULT_ACCEPTED:
tune_positive();
break;
case VEHICLE_CMD_RESULT_DENIED:
mavlink_log_critical(mavlink_fd, "[cmd] command denied: %u", cmd.command);
tune_negative();
break;
case VEHICLE_CMD_RESULT_FAILED:
mavlink_log_critical(mavlink_fd, "[cmd] command failed: %u", cmd.command);
tune_negative();
break;
case VEHICLE_CMD_RESULT_TEMPORARILY_REJECTED:
mavlink_log_critical(mavlink_fd, "[cmd] command temporarily rejected: %u", cmd.command);
tune_negative();
break;
case VEHICLE_CMD_RESULT_UNSUPPORTED:
mavlink_log_critical(mavlink_fd, "[cmd] command unsupported: %u", cmd.command);
tune_negative();
break;
default:
break;
}
}
void *commander_low_prio_loop(void *arg)
{
/* Set thread name */
prctl(PR_SET_NAME, "commander_low_prio", getpid());
/* Subscribe to command topic */
int cmd_sub = orb_subscribe(ORB_ID(vehicle_command));
struct vehicle_command_s cmd;
memset(&cmd, 0, sizeof(cmd));
/* wakeup source(s) */
struct pollfd fds[1];
/* use the gyro to pace output - XXX BROKEN if we are using the L3GD20 */
fds[0].fd = cmd_sub;
fds[0].events = POLLIN;
while (!thread_should_exit) {
/* wait for up to 100ms for data */
int pret = poll(&fds[0], (sizeof(fds) / sizeof(fds[0])), 1000);
/* timed out - periodic check for _task_should_exit, etc. */
if (pret == 0)
continue;
/* this is undesirable but not much we can do - might want to flag unhappy status */
if (pret < 0) {
warn("poll error %d, %d", pret, errno);
continue;
}
/* if we reach here, we have a valid command */
orb_copy(ORB_ID(vehicle_command), cmd_sub, &cmd);
/* ignore commands the high-prio loop handles */
if (cmd.command == VEHICLE_CMD_DO_SET_MODE ||
cmd.command == VEHICLE_CMD_COMPONENT_ARM_DISARM ||
cmd.command == VEHICLE_CMD_NAV_TAKEOFF)
continue;
/* only handle low-priority commands here */
switch (cmd.command) {
case VEHICLE_CMD_PREFLIGHT_REBOOT_SHUTDOWN:
if (is_safe(&status, &safety, &armed)) {
if (((int)(cmd.param1)) == 1) {
answer_command(cmd, VEHICLE_CMD_RESULT_ACCEPTED);
usleep(100000);
/* reboot */
systemreset(false);
} else if (((int)(cmd.param1)) == 3) {
answer_command(cmd, VEHICLE_CMD_RESULT_ACCEPTED);
usleep(100000);
/* reboot to bootloader */
systemreset(true);
} else {
answer_command(cmd, VEHICLE_CMD_RESULT_DENIED);
}
} else {
answer_command(cmd, VEHICLE_CMD_RESULT_DENIED);
}
break;
case VEHICLE_CMD_PREFLIGHT_CALIBRATION: {
int calib_ret = ERROR;
/* try to go to INIT/PREFLIGHT arming state */
// XXX disable interrupts in arming_state_transition
if (TRANSITION_DENIED == arming_state_transition(&status, &safety, ARMING_STATE_INIT, &armed)) {
answer_command(cmd, VEHICLE_CMD_RESULT_DENIED);
break;
}
if ((int)(cmd.param1) == 1) {
/* gyro calibration */
answer_command(cmd, VEHICLE_CMD_RESULT_ACCEPTED);
calib_ret = do_gyro_calibration(mavlink_fd);
} else if ((int)(cmd.param2) == 1) {
/* magnetometer calibration */
answer_command(cmd, VEHICLE_CMD_RESULT_ACCEPTED);
calib_ret = do_mag_calibration(mavlink_fd);
} else if ((int)(cmd.param3) == 1) {
/* zero-altitude pressure calibration */
answer_command(cmd, VEHICLE_CMD_RESULT_DENIED);
} else if ((int)(cmd.param4) == 1) {
/* RC calibration */
answer_command(cmd, VEHICLE_CMD_RESULT_DENIED);
calib_ret = do_rc_calibration(mavlink_fd);
} else if ((int)(cmd.param5) == 1) {
/* accelerometer calibration */
answer_command(cmd, VEHICLE_CMD_RESULT_ACCEPTED);
calib_ret = do_accel_calibration(mavlink_fd);
} else if ((int)(cmd.param6) == 1) {
/* airspeed calibration */
answer_command(cmd, VEHICLE_CMD_RESULT_ACCEPTED);
calib_ret = do_airspeed_calibration(mavlink_fd);
}
if (calib_ret == OK)
tune_positive();
else
tune_negative();
arming_state_transition(&status, &safety, ARMING_STATE_STANDBY, &armed);
break;
}
case VEHICLE_CMD_PREFLIGHT_STORAGE: {
if (((int)(cmd.param1)) == 0) {
int ret = param_load_default();
if (ret == OK) {
mavlink_log_info(mavlink_fd, "[cmd] parameters loaded");
answer_command(cmd, VEHICLE_CMD_RESULT_ACCEPTED);
} else {
mavlink_log_critical(mavlink_fd, "[cmd] parameters load ERROR");
/* convenience as many parts of NuttX use negative errno */
if (ret < 0)
ret = -ret;
if (ret < 1000)
mavlink_log_critical(mavlink_fd, "[cmd] %s", strerror(ret));
answer_command(cmd, VEHICLE_CMD_RESULT_FAILED);
}
} else if (((int)(cmd.param1)) == 1) {
int ret = param_save_default();
if (ret == OK) {
mavlink_log_info(mavlink_fd, "[cmd] parameters saved");
answer_command(cmd, VEHICLE_CMD_RESULT_ACCEPTED);
} else {
mavlink_log_critical(mavlink_fd, "[cmd] parameters save error");
/* convenience as many parts of NuttX use negative errno */
if (ret < 0)
ret = -ret;
if (ret < 1000)
mavlink_log_critical(mavlink_fd, "[cmd] %s", strerror(ret));
answer_command(cmd, VEHICLE_CMD_RESULT_FAILED);
}
}
break;
}
default:
answer_command(cmd, VEHICLE_CMD_RESULT_UNSUPPORTED);
break;
}
/* send any requested ACKs */
if (cmd.confirmation > 0 && cmd.command != VEHICLE_CMD_DO_SET_MODE
&& cmd.command != VEHICLE_CMD_COMPONENT_ARM_DISARM) {
/* send acknowledge command */
// XXX TODO
}
}
close(cmd_sub);
return 0;
}
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