/// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- #define THISFIRMWARE "ArduPlane V2.76" /* Lead developer: Andrew Tridgell Authors: Doug Weibel, Jose Julio, Jordi Munoz, Jason Short, Randy Mackay, Pat Hickey, John Arne Birkeland, Olivier Adler, Amilcar Lucas, Gregory Fletcher, Paul Riseborough, Brandon Jones, Jon Challinger Thanks to: Chris Anderson, Michael Oborne, Paul Mather, Bill Premerlani, James Cohen, JB from rotorFX, Automatik, Fefenin, Peter Meister, Remzibi, Yury Smirnov, Sandro Benigno, Max Levine, Roberto Navoni, Lorenz Meier, Yury MonZon Please contribute your ideas! See http://dev.ardupilot.com for details This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . */ //////////////////////////////////////////////////////////////////////////////// // Header includes //////////////////////////////////////////////////////////////////////////////// #include #include #include #include #include #include #include #include #include // ArduPilot GPS library #include // ArduPilot barometer library #include // ArduPilot Mega Magnetometer Library #include // ArduPilot Mega Vector/Matrix math Library #include // ArduPilot Mega Analog to Digital Converter Library #include #include // Inertial Sensor Library #include // ArduPilot Mega DCM Library #include // RC Channel Library #include // Range finder library #include // Filter library #include // APM FIFO Buffer #include // APM relay #include // Photo or video camera #include #include #include #include #include // MAVLink GCS definitions #include // Camera/Antenna mount #include // ArduPilot Mega Declination Helper Library #include #include #include // main loop scheduler #include #include #include // RC input mapping library #include #include #include #include // Notify library #include // Battery monitor library #include // Pre-AP_HAL compatibility #include "compat.h" // Configuration #include "config.h" // Local modules #include "defines.h" // key aircraft parameters passed to multiple libraries static AP_Vehicle::FixedWing aparm; #include "Parameters.h" #include "GCS.h" #include #include #include #include #include #include AP_HAL::BetterStream* cliSerial; const AP_HAL::HAL& hal = AP_HAL_BOARD_DRIVER; //////////////////////////////////////////////////////////////////////////////// // Outback Challenge Failsafe Support //////////////////////////////////////////////////////////////////////////////// #if OBC_FAILSAFE == ENABLED APM_OBC obc; #endif //////////////////////////////////////////////////////////////////////////////// // the rate we run the main loop at //////////////////////////////////////////////////////////////////////////////// static const AP_InertialSensor::Sample_rate ins_sample_rate = AP_InertialSensor::RATE_50HZ; //////////////////////////////////////////////////////////////////////////////// // Parameters //////////////////////////////////////////////////////////////////////////////// // // Global parameters are all contained within the 'g' class. // static Parameters g; // main loop scheduler static AP_Scheduler scheduler; // mapping between input channels static RCMapper rcmap; // primary control channels static RC_Channel *channel_roll; static RC_Channel *channel_pitch; static RC_Channel *channel_throttle; static RC_Channel *channel_rudder; // notification object for LEDs, buzzers etc (parameter set to false disables external leds) static AP_Notify notify; //////////////////////////////////////////////////////////////////////////////// // prototypes static void update_events(void); void gcs_send_text_fmt(const prog_char_t *fmt, ...); static void print_flight_mode(AP_HAL::BetterStream *port, uint8_t mode); //////////////////////////////////////////////////////////////////////////////// // DataFlash //////////////////////////////////////////////////////////////////////////////// #if LOGGING_ENABLED == ENABLED #if CONFIG_HAL_BOARD == HAL_BOARD_APM1 static DataFlash_APM1 DataFlash; #elif CONFIG_HAL_BOARD == HAL_BOARD_APM2 static DataFlash_APM2 DataFlash; #elif CONFIG_HAL_BOARD == HAL_BOARD_AVR_SITL //static DataFlash_File DataFlash("logs"); static DataFlash_SITL DataFlash; #elif CONFIG_HAL_BOARD == HAL_BOARD_PX4 static DataFlash_File DataFlash("/fs/microsd/APM/logs"); #elif CONFIG_HAL_BOARD == HAL_BOARD_LINUX static DataFlash_File DataFlash("logs"); #else // no dataflash driver DataFlash_Empty DataFlash; #endif #endif // scaled roll limit based on pitch static int32_t roll_limit_cd; static int32_t pitch_limit_min_cd; //////////////////////////////////////////////////////////////////////////////// // Sensors //////////////////////////////////////////////////////////////////////////////// // // There are three basic options related to flight sensor selection. // // - Normal flight mode. Real sensors are used. // - HIL Attitude mode. Most sensors are disabled, as the HIL // protocol supplies attitude information directly. // - HIL Sensors mode. Synthetic sensors are configured that // supply data from the simulation. // // All GPS access should be through this pointer. static GPS *g_gps; // flight modes convenience array static AP_Int8 *flight_modes = &g.flight_mode1; #if CONFIG_BARO == AP_BARO_BMP085 static AP_Baro_BMP085 barometer; #elif CONFIG_BARO == AP_BARO_PX4 static AP_Baro_PX4 barometer; #elif CONFIG_BARO == AP_BARO_HIL static AP_Baro_HIL barometer; #elif CONFIG_BARO == AP_BARO_MS5611 #if CONFIG_MS5611_SERIAL == AP_BARO_MS5611_SPI static AP_Baro_MS5611 barometer(&AP_Baro_MS5611::spi); #elif CONFIG_MS5611_SERIAL == AP_BARO_MS5611_I2C static AP_Baro_MS5611 barometer(&AP_Baro_MS5611::i2c); #else #error Unrecognized CONFIG_MS5611_SERIAL setting. #endif #else #error Unrecognized CONFIG_BARO setting #endif #if CONFIG_COMPASS == AP_COMPASS_PX4 static AP_Compass_PX4 compass; #elif CONFIG_COMPASS == AP_COMPASS_HMC5843 static AP_Compass_HMC5843 compass; #elif CONFIG_COMPASS == AP_COMPASS_HIL static AP_Compass_HIL compass; #else #error Unrecognized CONFIG_COMPASS setting #endif // GPS selection #if GPS_PROTOCOL == GPS_PROTOCOL_AUTO AP_GPS_Auto g_gps_driver(&g_gps); #elif GPS_PROTOCOL == GPS_PROTOCOL_NMEA AP_GPS_NMEA g_gps_driver; #elif GPS_PROTOCOL == GPS_PROTOCOL_SIRF AP_GPS_SIRF g_gps_driver; #elif GPS_PROTOCOL == GPS_PROTOCOL_UBLOX AP_GPS_UBLOX g_gps_driver; #elif GPS_PROTOCOL == GPS_PROTOCOL_MTK AP_GPS_MTK g_gps_driver; #elif GPS_PROTOCOL == GPS_PROTOCOL_MTK19 AP_GPS_MTK19 g_gps_driver; #elif GPS_PROTOCOL == GPS_PROTOCOL_NONE AP_GPS_None g_gps_driver; #elif GPS_PROTOCOL == GPS_PROTOCOL_HIL AP_GPS_HIL g_gps_driver; #else #error Unrecognised GPS_PROTOCOL setting. #endif // GPS PROTOCOL #if CONFIG_INS_TYPE == CONFIG_INS_OILPAN || CONFIG_HAL_BOARD == HAL_BOARD_APM1 AP_ADC_ADS7844 apm1_adc; #endif #if CONFIG_INS_TYPE == CONFIG_INS_MPU6000 AP_InertialSensor_MPU6000 ins; #elif CONFIG_INS_TYPE == CONFIG_INS_PX4 AP_InertialSensor_PX4 ins; #elif CONFIG_INS_TYPE == CONFIG_INS_HIL AP_InertialSensor_HIL ins; #elif CONFIG_INS_TYPE == CONFIG_INS_OILPAN AP_InertialSensor_Oilpan ins( &apm1_adc ); #elif CONFIG_INS_TYPE == CONFIG_INS_FLYMAPLE AP_InertialSensor_Flymaple ins; #elif CONFIG_INS_TYPE == CONFIG_INS_L3G4200D AP_InertialSensor_L3G4200D ins; #else #error Unrecognised CONFIG_INS_TYPE setting. #endif // CONFIG_INS_TYPE AP_AHRS_DCM ahrs(ins, g_gps); static AP_L1_Control L1_controller(ahrs); static AP_TECS TECS_controller(ahrs, aparm); // Attitude to servo controllers static AP_RollController rollController(ahrs, aparm); static AP_PitchController pitchController(ahrs, aparm); static AP_YawController yawController(ahrs, aparm); static AP_SteerController steerController(ahrs); #if CONFIG_HAL_BOARD == HAL_BOARD_AVR_SITL SITL sitl; #endif // Training mode static bool training_manual_roll; // user has manual roll control static bool training_manual_pitch; // user has manual pitch control // should throttle be pass-thru in guided? static bool guided_throttle_passthru; //////////////////////////////////////////////////////////////////////////////// // GCS selection //////////////////////////////////////////////////////////////////////////////// static const uint8_t num_gcs = MAVLINK_COMM_NUM_BUFFERS; static GCS_MAVLINK gcs[MAVLINK_COMM_NUM_BUFFERS]; // selected navigation controller static AP_Navigation *nav_controller = &L1_controller; // selected navigation controller static AP_SpdHgtControl *SpdHgt_Controller = &TECS_controller; //////////////////////////////////////////////////////////////////////////////// // Analog Inputs //////////////////////////////////////////////////////////////////////////////// // a pin for reading the receiver RSSI voltage. static AP_HAL::AnalogSource *rssi_analog_source; static AP_HAL::AnalogSource *vcc_pin; //////////////////////////////////////////////////////////////////////////////// // Sonar //////////////////////////////////////////////////////////////////////////////// static AP_RangeFinder_analog sonar; //////////////////////////////////////////////////////////////////////////////// // Relay //////////////////////////////////////////////////////////////////////////////// static AP_Relay relay; // Camera #if CAMERA == ENABLED static AP_Camera camera(&relay); #endif //////////////////////////////////////////////////////////////////////////////// // Global variables //////////////////////////////////////////////////////////////////////////////// // remember if USB is connected, so we can adjust baud rate static bool usb_connected; /* Radio values * Channel assignments * 1 Ailerons * 2 Elevator * 3 Throttle * 4 Rudder * 5 Aux5 * 6 Aux6 * 7 Aux7 * 8 Aux8/Mode * Each Aux channel can be configured to have any of the available auxiliary functions assigned to it. * See libraries/RC_Channel/RC_Channel_aux.h for more information */ //////////////////////////////////////////////////////////////////////////////// // Radio //////////////////////////////////////////////////////////////////////////////// // This is the state of the flight control system // There are multiple states defined such as MANUAL, FBW-A, AUTO enum FlightMode control_mode = INITIALISING; // Used to maintain the state of the previous control switch position // This is set to -1 when we need to re-read the switch uint8_t oldSwitchPosition; // This is used to enable the inverted flight feature bool inverted_flight = false; static struct { // These are trim values used for elevon control // For elevons radio_in[CH_ROLL] and radio_in[CH_PITCH] are // equivalent aileron and elevator, not left and right elevon uint16_t trim1; uint16_t trim2; // These are used in the calculation of elevon1_trim and elevon2_trim uint16_t ch1_temp; uint16_t ch2_temp; } elevon = { trim1 : 1500, trim2 : 1500, ch1_temp : 1500, ch2_temp : 1500 }; //////////////////////////////////////////////////////////////////////////////// // Failsafe //////////////////////////////////////////////////////////////////////////////// static struct { // A flag if GCS joystick control is in use uint8_t rc_override_active:1; // Used to track if the value on channel 3 (throtttle) has fallen below the failsafe threshold // RC receiver should be set up to output a low throttle value when signal is lost uint8_t ch3_failsafe:1; // has the saved mode for failsafe been set? uint8_t saved_mode_set:1; // flag to hold whether battery low voltage threshold has been breached uint8_t low_battery:1; // saved flight mode enum FlightMode saved_mode; // A tracking variable for type of failsafe active // Used for failsafe based on loss of RC signal or GCS signal int16_t state; // number of low ch3 values uint8_t ch3_counter; // the time when the last HEARTBEAT message arrived from a GCS uint32_t last_heartbeat_ms; // A timer used to track how long we have been in a "short failsafe" condition due to loss of RC signal uint32_t ch3_timer_ms; } failsafe; //////////////////////////////////////////////////////////////////////////////// // GPS variables //////////////////////////////////////////////////////////////////////////////// // This is used to scale GPS values for EEPROM storage // 10^7 times Decimal GPS means 1 == 1cm // This approximation makes calculations integer and it's easy to read static const float t7 = 10000000.0; // We use atan2 and other trig techniques to calaculate angles // A counter used to count down valid gps fixes to allow the gps estimate to settle // before recording our home position (and executing a ground start if we booted with an air start) static uint8_t ground_start_count = 5; // Used to compute a speed estimate from the first valid gps fixes to decide if we are // on the ground or in the air. Used to decide if a ground start is appropriate if we // booted with an air start. static int16_t ground_start_avg; // true if we have a position estimate from AHRS static bool have_position; //////////////////////////////////////////////////////////////////////////////// // Location & Navigation //////////////////////////////////////////////////////////////////////////////// // There may be two active commands in Auto mode. // This indicates the active navigation command by index number static uint8_t nav_command_index; // This indicates the active non-navigation command by index number static uint8_t non_nav_command_index; // This is the command type (eg navigate to waypoint) of the active navigation command static uint8_t nav_command_ID = NO_COMMAND; static uint8_t non_nav_command_ID = NO_COMMAND; //////////////////////////////////////////////////////////////////////////////// // Airspeed //////////////////////////////////////////////////////////////////////////////// // The calculated airspeed to use in FBW-B. Also used in higher modes for insuring min ground speed is met. // Also used for flap deployment criteria. Centimeters per second. static int32_t target_airspeed_cm; // The difference between current and desired airspeed. Used in the pitch controller. Centimeters per second. static float airspeed_error_cm; // An amount that the airspeed should be increased in auto modes based on the user positioning the // throttle stick in the top half of the range. Centimeters per second. static int16_t airspeed_nudge_cm; // Similar to airspeed_nudge, but used when no airspeed sensor. // 0-(throttle_max - throttle_cruise) : throttle nudge in Auto mode using top 1/2 of throttle stick travel static int16_t throttle_nudge = 0; // receiver RSSI static uint8_t receiver_rssi; //////////////////////////////////////////////////////////////////////////////// // Ground speed //////////////////////////////////////////////////////////////////////////////// // The amount current ground speed is below min ground speed. Centimeters per second static int32_t groundspeed_undershoot = 0; // Difference between current altitude and desired altitude. Centimeters static int32_t altitude_error_cm; //////////////////////////////////////////////////////////////////////////////// // Battery Sensors //////////////////////////////////////////////////////////////////////////////// static AP_BattMonitor battery; //////////////////////////////////////////////////////////////////////////////// // Airspeed Sensors //////////////////////////////////////////////////////////////////////////////// AP_Airspeed airspeed(aparm); //////////////////////////////////////////////////////////////////////////////// // ACRO controller state //////////////////////////////////////////////////////////////////////////////// static struct { bool locked_roll; bool locked_pitch; float locked_roll_err; int32_t locked_pitch_cd; } acro_state; //////////////////////////////////////////////////////////////////////////////// // CRUISE controller state //////////////////////////////////////////////////////////////////////////////// static struct { bool locked_heading; int32_t locked_heading_cd; uint32_t lock_timer_ms; } cruise_state; //////////////////////////////////////////////////////////////////////////////// // ground steering controller state //////////////////////////////////////////////////////////////////////////////// static struct { // Direction held during phases of takeoff and landing centidegrees // A value of -1 indicates the course has not been set/is not in use // this is a 0..36000 value, or -1 for disabled int32_t hold_course_cd; // locked_course and locked_course_cd are used in stabilize mode // when ground steering is active bool locked_course; float locked_course_err; } steer_state = { hold_course_cd : -1, }; //////////////////////////////////////////////////////////////////////////////// // flight mode specific //////////////////////////////////////////////////////////////////////////////// // Flag for using gps ground course instead of INS yaw. Set false when takeoff command in process. static bool takeoff_complete = true; // Flag to indicate if we have landed. //Set land_complete if we are within 2 seconds distance or within 3 meters altitude of touchdown static bool land_complete; // Altitude threshold to complete a takeoff command in autonomous modes. Centimeters static int32_t takeoff_altitude_cm; // Minimum pitch to hold during takeoff command execution. Hundredths of a degree static int16_t takeoff_pitch_cd; // true if we are in an auto-throttle mode, which means // we need to run the speed/height controller static bool auto_throttle_mode; // this controls throttle suppression in auto modes static bool throttle_suppressed; //////////////////////////////////////////////////////////////////////////////// // Loiter management //////////////////////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////////////// // Navigation control variables //////////////////////////////////////////////////////////////////////////////// // The instantaneous desired bank angle. Hundredths of a degree static int32_t nav_roll_cd; // The instantaneous desired pitch angle. Hundredths of a degree static int32_t nav_pitch_cd; //////////////////////////////////////////////////////////////////////////////// // Waypoint distances //////////////////////////////////////////////////////////////////////////////// // Distance between plane and next waypoint. Meters static uint32_t wp_distance; // Distance between previous and next waypoint. Meters static uint32_t wp_totalDistance; /* meta data to support counting the number of circles in a loiter */ static struct { // previous target bearing, used to update sum_cd int32_t old_target_bearing_cd; // Total desired rotation in a loiter. Used for Loiter Turns commands. int32_t total_cd; // total angle completed in the loiter so far int32_t sum_cd; // Direction for loiter. 1 for clockwise, -1 for counter-clockwise int8_t direction; // start time of the loiter. Milliseconds. uint32_t start_time_ms; // The amount of time we should stay in a loiter for the Loiter Time command. Milliseconds. uint32_t time_max_ms; } loiter; // event control state enum event_type { EVENT_TYPE_RELAY=0, EVENT_TYPE_SERVO=1 }; static struct { enum event_type type; // when the event was started in ms uint32_t start_time_ms; // how long to delay the next firing of event in millis uint16_t delay_ms; // how many times to cycle : -1 (or -2) = forever, 2 = do one cycle, 4 = do two cycles int16_t repeat; // RC channel for servos uint8_t rc_channel; // PWM for servos uint16_t servo_value; // the value used to cycle events (alternate value to event_value) uint16_t undo_value; } event_state; //////////////////////////////////////////////////////////////////////////////// // Conditional command //////////////////////////////////////////////////////////////////////////////// // A value used in condition commands (eg delay, change alt, etc.) // For example in a change altitude command, it is the altitude to change to. static int32_t condition_value; // A starting value used to check the status of a conditional command. // For example in a delay command the condition_start records that start time for the delay static uint32_t condition_start; // A value used in condition commands. For example the rate at which to change altitude. static int16_t condition_rate; //////////////////////////////////////////////////////////////////////////////// // 3D Location vectors // Location structure defined in AP_Common //////////////////////////////////////////////////////////////////////////////// // The home location used for RTL. The location is set when we first get stable GPS lock static struct Location home; // Flag for if we have g_gps lock and have set the home location static bool home_is_set; // The location of the previous waypoint. Used for track following and altitude ramp calculations static struct Location prev_WP; // The plane's current location static struct Location current_loc; // The location of the current/active waypoint. Used for altitude ramp, track following and loiter calculations. static struct Location next_WP; // The location of the active waypoint in Guided mode. static struct Location guided_WP; // The location structure information from the Nav command being processed static struct Location next_nav_command; // The location structure information from the Non-Nav command being processed static struct Location next_nonnav_command; //////////////////////////////////////////////////////////////////////////////// // Altitude / Climb rate control //////////////////////////////////////////////////////////////////////////////// // The current desired altitude. Altitude is linearly ramped between waypoints. Centimeters static int32_t target_altitude_cm; // Altitude difference between previous and current waypoint. Centimeters static int32_t offset_altitude_cm; //////////////////////////////////////////////////////////////////////////////// // INS variables //////////////////////////////////////////////////////////////////////////////// // The main loop execution time. Seconds //This is the time between calls to the DCM algorithm and is the Integration time for the gyros. static float G_Dt = 0.02f; //////////////////////////////////////////////////////////////////////////////// // Performance monitoring //////////////////////////////////////////////////////////////////////////////// // Timer used to accrue data and trigger recording of the performanc monitoring log message static uint32_t perf_mon_timer; // The maximum main loop execution time recorded in the current performance monitoring interval static uint32_t G_Dt_max = 0; // The number of gps fixes recorded in the current performance monitoring interval static uint8_t gps_fix_count = 0; //////////////////////////////////////////////////////////////////////////////// // System Timers //////////////////////////////////////////////////////////////////////////////// // Time in microseconds of start of main control loop static uint32_t fast_loopTimer_us; // Number of milliseconds used in last main loop cycle static uint32_t delta_us_fast_loop; // Counter of main loop executions. Used for performance monitoring and failsafe processing static uint16_t mainLoop_count; // Camera/Antenna mount tracking and stabilisation stuff // -------------------------------------- #if MOUNT == ENABLED // current_loc uses the baro/gps soloution for altitude rather than gps only. // mabe one could use current_loc for lat/lon too and eliminate g_gps alltogether? static AP_Mount camera_mount(¤t_loc, g_gps, ahrs, 0); #endif #if MOUNT2 == ENABLED // current_loc uses the baro/gps soloution for altitude rather than gps only. // mabe one could use current_loc for lat/lon too and eliminate g_gps alltogether? static AP_Mount camera_mount2(¤t_loc, g_gps, ahrs, 1); #endif //////////////////////////////////////////////////////////////////////////////// // Arming/Disarming mangement class //////////////////////////////////////////////////////////////////////////////// static AP_Arming arming(ahrs, barometer, home_is_set, gcs_send_text_P); //////////////////////////////////////////////////////////////////////////////// // Top-level logic //////////////////////////////////////////////////////////////////////////////// /* scheduler table - all regular tasks are listed here, along with how often they should be called (in 20ms units) and the maximum time they are expected to take (in microseconds) */ static const AP_Scheduler::Task scheduler_tasks[] PROGMEM = { { read_radio, 1, 700 }, // 0 { check_short_failsafe, 1, 1000 }, { ahrs_update, 1, 6400 }, { update_speed_height, 1, 1600 }, { update_flight_mode, 1, 1400 }, { stabilize, 1, 3500 }, { set_servos, 1, 1600 }, { read_control_switch, 7, 1000 }, { gcs_retry_deferred, 1, 1000 }, { update_GPS, 5, 3700 }, { navigate, 5, 3000 }, // 10 { update_compass, 5, 1200 }, { read_airspeed, 5, 1200 }, { update_alt, 5, 3400 }, { calc_altitude_error, 5, 1000 }, { update_commands, 5, 5000 }, { obc_fs_check, 5, 1000 }, { gcs_update, 1, 1700 }, { gcs_data_stream_send, 1, 3000 }, { update_events, 15, 1500 }, { check_usb_mux, 5, 300 }, // 20 { read_battery, 5, 1000 }, { compass_accumulate, 1, 1500 }, { barometer_accumulate, 1, 900 }, { update_notify, 1, 300 }, { read_sonars, 1, 500 }, { one_second_loop, 50, 1000 }, { check_long_failsafe, 15, 1000 }, { read_receiver_rssi, 5, 1000 }, { airspeed_ratio_update, 50, 1000 }, { update_mount, 1, 1500 }, // 30 { log_perf_info, 500, 1000 }, { compass_save, 3000, 2500 }, { update_logging, 5, 1200 }, }; // setup the var_info table AP_Param param_loader(var_info, WP_START_BYTE); void setup() { // this needs to be the first call, as it fills memory with // sentinel values memcheck_init(); cliSerial = hal.console; // load the default values of variables listed in var_info[] AP_Param::setup_sketch_defaults(); AP_Notify::flags.failsafe_battery = false; notify.init(false); battery.init(); rssi_analog_source = hal.analogin->channel(ANALOG_INPUT_NONE); vcc_pin = hal.analogin->channel(ANALOG_INPUT_BOARD_VCC); init_ardupilot(); // initialise the main loop scheduler scheduler.init(&scheduler_tasks[0], sizeof(scheduler_tasks)/sizeof(scheduler_tasks[0])); } void loop() { // wait for an INS sample if (!ins.wait_for_sample(1000)) { return; } uint32_t timer = hal.scheduler->micros(); delta_us_fast_loop = timer - fast_loopTimer_us; G_Dt = delta_us_fast_loop * 1.0e-6f; fast_loopTimer_us = timer; if (delta_us_fast_loop > G_Dt_max) G_Dt_max = delta_us_fast_loop; mainLoop_count++; // tell the scheduler one tick has passed scheduler.tick(); // run all the tasks that are due to run. Note that we only // have to call this once per loop, as the tasks are scheduled // in multiples of the main loop tick. So if they don't run on // the first call to the scheduler they won't run on a later // call until scheduler.tick() is called again uint32_t remaining = (timer + 20000) - hal.scheduler->micros(); if (remaining > 19500) { remaining = 19500; } scheduler.run(remaining); } // update AHRS system static void ahrs_update() { #if HIL_MODE != HIL_MODE_DISABLED // update hil before AHRS update gcs_update(); #endif ahrs.update(); if (g.log_bitmask & MASK_LOG_ATTITUDE_FAST) Log_Write_Attitude(); if (g.log_bitmask & MASK_LOG_IMU) Log_Write_IMU(); // calculate a scaled roll limit based on current pitch roll_limit_cd = g.roll_limit_cd * cosf(ahrs.pitch); pitch_limit_min_cd = aparm.pitch_limit_min_cd * fabsf(cosf(ahrs.roll)); } /* update 50Hz speed/height controller */ static void update_speed_height(void) { if (auto_throttle_mode) { // Call TECS 50Hz update. Note that we call this regardless of // throttle suppressed, as this needs to be running for // takeoff detection SpdHgt_Controller->update_50hz(relative_altitude()); } } /* update camera mount */ static void update_mount(void) { #if MOUNT == ENABLED camera_mount.update_mount_position(); #endif #if MOUNT2 == ENABLED camera_mount2.update_mount_position(); #endif #if CAMERA == ENABLED camera.trigger_pic_cleanup(); #endif } /* read and update compass */ static void update_compass(void) { if (g.compass_enabled && compass.read()) { ahrs.set_compass(&compass); compass.null_offsets(); if (g.log_bitmask & MASK_LOG_COMPASS) { Log_Write_Compass(); } } else { ahrs.set_compass(NULL); } } /* if the compass is enabled then try to accumulate a reading */ static void compass_accumulate(void) { if (g.compass_enabled) { compass.accumulate(); } } /* try to accumulate a baro reading */ static void barometer_accumulate(void) { barometer.accumulate(); } /* do 10Hz logging */ static void update_logging(void) { if ((g.log_bitmask & MASK_LOG_ATTITUDE_MED) && !(g.log_bitmask & MASK_LOG_ATTITUDE_FAST)) Log_Write_Attitude(); if ((g.log_bitmask & MASK_LOG_ATTITUDE_MED) && !(g.log_bitmask & MASK_LOG_IMU)) Log_Write_IMU(); if (g.log_bitmask & MASK_LOG_CTUN) Log_Write_Control_Tuning(); if (g.log_bitmask & MASK_LOG_NTUN) Log_Write_Nav_Tuning(); if (g.log_bitmask & MASK_LOG_RC) Log_Write_RC(); } /* check for OBC failsafe check */ static void obc_fs_check(void) { #if OBC_FAILSAFE == ENABLED // perform OBC failsafe checks obc.check(OBC_MODE(control_mode), failsafe.last_heartbeat_ms, g_gps ? g_gps->last_fix_time : 0); #endif } /* update aux servo mappings */ static void update_aux(void) { #if CONFIG_HAL_BOARD == HAL_BOARD_PX4 update_aux_servo_function(&g.rc_5, &g.rc_6, &g.rc_7, &g.rc_8, &g.rc_9, &g.rc_10, &g.rc_11, &g.rc_12); #elif CONFIG_HAL_BOARD == HAL_BOARD_APM2 update_aux_servo_function(&g.rc_5, &g.rc_6, &g.rc_7, &g.rc_8, &g.rc_10, &g.rc_11); #else update_aux_servo_function(&g.rc_5, &g.rc_6, &g.rc_7, &g.rc_8); #endif enable_aux_servos(); #if MOUNT == ENABLED camera_mount.update_mount_type(); #endif #if MOUNT2 == ENABLED camera_mount2.update_mount_type(); #endif } static void one_second_loop() { if (g.log_bitmask & MASK_LOG_CURRENT) Log_Write_Current(); // send a heartbeat gcs_send_message(MSG_HEARTBEAT); // make it possible to change control channel ordering at runtime set_control_channels(); // make it possible to change orientation at runtime ahrs.set_orientation(); // sync MAVLink system ID mavlink_system.sysid = g.sysid_this_mav; update_aux(); } static void log_perf_info() { if (scheduler.debug() != 0) { hal.console->printf_P(PSTR("G_Dt_max=%lu\n"), (unsigned long)G_Dt_max); } if (g.log_bitmask & MASK_LOG_PM) Log_Write_Performance(); G_Dt_max = 0; resetPerfData(); } static void compass_save() { if (g.compass_enabled) { compass.save_offsets(); } } /* once a second update the airspeed calibration ratio */ static void airspeed_ratio_update(void) { if (!airspeed.enabled() || g_gps->status() < GPS::GPS_OK_FIX_3D || g_gps->ground_speed_cm < 400 || airspeed.get_airspeed() < aparm.airspeed_min) { // don't calibrate when not moving return; } if (abs(ahrs.roll_sensor) > roll_limit_cd || ahrs.pitch_sensor > aparm.pitch_limit_max_cd || ahrs.pitch_sensor < pitch_limit_min_cd) { // don't calibrate when going beyond normal flight envelope return; } Vector3f vg = g_gps->velocity_vector(); airspeed.update_calibration(vg); gcs_send_airspeed_calibration(vg); } /* read the GPS and update position */ static void update_GPS(void) { static uint32_t last_gps_reading; g_gps->update(); if (g_gps->last_message_time_ms() != last_gps_reading) { last_gps_reading = g_gps->last_message_time_ms(); if (g.log_bitmask & MASK_LOG_GPS) { Log_Write_GPS(); } } // get position from AHRS have_position = ahrs.get_projected_position(current_loc); if (g_gps->new_data && g_gps->status() >= GPS::GPS_OK_FIX_3D) { g_gps->new_data = false; // for performance // --------------- gps_fix_count++; if(ground_start_count > 1) { ground_start_count--; ground_start_avg += g_gps->ground_speed_cm; } else if (ground_start_count == 1) { // We countdown N number of good GPS fixes // so that the altitude is more accurate // ------------------------------------- if (current_loc.lat == 0) { ground_start_count = 5; } else { init_home(); // set system clock for log timestamps hal.util->set_system_clock(g_gps->time_epoch_usec()); if (g.compass_enabled) { // Set compass declination automatically compass.set_initial_location(g_gps->latitude, g_gps->longitude); } ground_start_count = 0; } } // see if we've breached the geo-fence geofence_check(false); #if CAMERA == ENABLED if (camera.update_location(current_loc) == true) { do_take_picture(); } #endif if (!arming.is_armed() || hal.util->safety_switch_state() == AP_HAL::Util::SAFETY_DISARMED) { update_home(); } } calc_gndspeed_undershoot(); } /* main handling for AUTO mode */ static void handle_auto_mode(void) { switch(nav_command_ID) { case MAV_CMD_NAV_TAKEOFF: if (steer_state.hold_course_cd == -1) { // we don't yet have a heading to hold - just level // the wings until we get up enough speed to get a GPS heading nav_roll_cd = 0; } else { calc_nav_roll(); // during takeoff use the level flight roll limit to // prevent large course corrections nav_roll_cd = constrain_int32(nav_roll_cd, -g.level_roll_limit*100UL, g.level_roll_limit*100UL); } if (airspeed.use()) { calc_nav_pitch(); if (nav_pitch_cd < takeoff_pitch_cd) nav_pitch_cd = takeoff_pitch_cd; } else { nav_pitch_cd = (g_gps->ground_speed_cm / (float)g.airspeed_cruise_cm) * takeoff_pitch_cd; nav_pitch_cd = constrain_int32(nav_pitch_cd, 500, takeoff_pitch_cd); } // max throttle for takeoff channel_throttle->servo_out = aparm.throttle_max; break; case MAV_CMD_NAV_LAND: calc_nav_roll(); if (land_complete) { // during final approach constrain roll to the range // allowed for level flight nav_roll_cd = constrain_int32(nav_roll_cd, -g.level_roll_limit*100UL, g.level_roll_limit*100UL); // hold pitch constant in final approach nav_pitch_cd = g.land_pitch_cd; } else { calc_nav_pitch(); if (!airspeed.use()) { // when not under airspeed control, don't allow // down pitch in landing nav_pitch_cd = constrain_int32(nav_pitch_cd, 0, nav_pitch_cd); } } calc_throttle(); if (land_complete) { // we are in the final stage of a landing - force // zero throttle channel_throttle->servo_out = 0; } break; default: // we are doing normal AUTO flight, the special cases // are for takeoff and landing steer_state.hold_course_cd = -1; land_complete = false; calc_nav_roll(); calc_nav_pitch(); calc_throttle(); break; } } /* main flight mode dependent update code */ static void update_flight_mode(void) { enum FlightMode effective_mode = control_mode; if (control_mode == AUTO && g.auto_fbw_steer) { effective_mode = FLY_BY_WIRE_A; } if (effective_mode != AUTO) { // hold_course is only used in takeoff and landing steer_state.hold_course_cd = -1; } switch (effective_mode) { case AUTO: handle_auto_mode(); break; case RTL: case LOITER: case GUIDED: calc_nav_roll(); calc_nav_pitch(); calc_throttle(); break; case TRAINING: { training_manual_roll = false; training_manual_pitch = false; // if the roll is past the set roll limit, then // we set target roll to the limit if (ahrs.roll_sensor >= roll_limit_cd) { nav_roll_cd = roll_limit_cd; } else if (ahrs.roll_sensor <= -roll_limit_cd) { nav_roll_cd = -roll_limit_cd; } else { training_manual_roll = true; nav_roll_cd = 0; } // if the pitch is past the set pitch limits, then // we set target pitch to the limit if (ahrs.pitch_sensor >= aparm.pitch_limit_max_cd) { nav_pitch_cd = aparm.pitch_limit_max_cd; } else if (ahrs.pitch_sensor <= pitch_limit_min_cd) { nav_pitch_cd = pitch_limit_min_cd; } else { training_manual_pitch = true; nav_pitch_cd = 0; } if (inverted_flight) { nav_pitch_cd = -nav_pitch_cd; } break; } case ACRO: { // handle locked/unlocked control if (acro_state.locked_roll) { nav_roll_cd = acro_state.locked_roll_err; } else { nav_roll_cd = ahrs.roll_sensor; } if (acro_state.locked_pitch) { nav_pitch_cd = acro_state.locked_pitch_cd; } else { nav_pitch_cd = ahrs.pitch_sensor; } break; } case FLY_BY_WIRE_A: { // set nav_roll and nav_pitch using sticks nav_roll_cd = channel_roll->norm_input() * roll_limit_cd; nav_roll_cd = constrain_int32(nav_roll_cd, -roll_limit_cd, roll_limit_cd); float pitch_input = channel_pitch->norm_input(); if (pitch_input > 0) { nav_pitch_cd = pitch_input * aparm.pitch_limit_max_cd; } else { nav_pitch_cd = -(pitch_input * pitch_limit_min_cd); } nav_pitch_cd = constrain_int32(nav_pitch_cd, pitch_limit_min_cd, aparm.pitch_limit_max_cd.get()); if (inverted_flight) { nav_pitch_cd = -nav_pitch_cd; } if (failsafe.ch3_failsafe && g.short_fs_action == 2) { // FBWA failsafe glide nav_roll_cd = 0; nav_pitch_cd = 0; } break; } case FLY_BY_WIRE_B: // Thanks to Yury MonZon for the altitude limit code! nav_roll_cd = channel_roll->norm_input() * roll_limit_cd; update_fbwb_speed_height(); break; case CRUISE: /* in CRUISE mode we use the navigation code to control roll when heading is locked. Heading becomes unlocked on any aileron or rudder input */ if ((channel_roll->control_in != 0 || channel_rudder->control_in != 0)) { cruise_state.locked_heading = false; cruise_state.lock_timer_ms = 0; } if (!cruise_state.locked_heading) { nav_roll_cd = channel_roll->norm_input() * roll_limit_cd; } else { calc_nav_roll(); } update_fbwb_speed_height(); break; case STABILIZE: nav_roll_cd = 0; nav_pitch_cd = 0; // throttle is passthrough break; case CIRCLE: // we have no GPS installed and have lost radio contact // or we just want to fly around in a gentle circle w/o GPS, // holding altitude at the altitude we set when we // switched into the mode nav_roll_cd = roll_limit_cd / 3; calc_nav_pitch(); calc_throttle(); break; case MANUAL: // servo_out is for Sim control only // --------------------------------- channel_roll->servo_out = channel_roll->pwm_to_angle(); channel_pitch->servo_out = channel_pitch->pwm_to_angle(); channel_rudder->servo_out = channel_rudder->pwm_to_angle(); break; //roll: -13788.000, pitch: -13698.000, thr: 0.000, rud: -13742.000 case INITIALISING: // handled elsewhere break; } } static void update_navigation() { // wp_distance is in ACTUAL meters, not the *100 meters we get from the GPS // ------------------------------------------------------------------------ // distance and bearing calcs only switch(control_mode) { case AUTO: verify_commands(); break; case LOITER: case RTL: case GUIDED: // allow loiter direction to be changed in flight if (g.loiter_radius < 0) { loiter.direction = -1; } else { loiter.direction = 1; } update_loiter(); break; case CRUISE: update_cruise(); break; case MANUAL: case STABILIZE: case TRAINING: case INITIALISING: case ACRO: case FLY_BY_WIRE_A: case FLY_BY_WIRE_B: case CIRCLE: // nothing to do break; } } static void update_alt() { // this function is in place to potentially add a sonar sensor in the future //altitude_sensor = BARO; if (barometer.healthy) { // alt_MSL centimeters (centimeters) current_loc.alt = (1 - g.altitude_mix) * g_gps->altitude_cm; current_loc.alt += g.altitude_mix * (read_barometer() + home.alt); } else if (g_gps->status() >= GPS::GPS_OK_FIX_3D) { // alt_MSL centimeters (centimeters) current_loc.alt = g_gps->altitude_cm; } geofence_check(true); // Update the speed & height controller states if (auto_throttle_mode && !throttle_suppressed) { AP_SpdHgtControl::FlightStage flight_stage = AP_SpdHgtControl::FLIGHT_NORMAL; if (control_mode==AUTO) { if (takeoff_complete == false) { flight_stage = AP_SpdHgtControl::FLIGHT_TAKEOFF; } else if (nav_command_ID == MAV_CMD_NAV_LAND && land_complete == true) { flight_stage = AP_SpdHgtControl::FLIGHT_LAND_FINAL; } else if (nav_command_ID == MAV_CMD_NAV_LAND) { flight_stage = AP_SpdHgtControl::FLIGHT_LAND_APPROACH; } } SpdHgt_Controller->update_pitch_throttle(target_altitude_cm - home.alt + (int32_t(g.alt_offset)*100), target_airspeed_cm, flight_stage, takeoff_pitch_cd, throttle_nudge, relative_altitude()); if (g.log_bitmask & MASK_LOG_TECS) { Log_Write_TECS_Tuning(); } } // tell AHRS the airspeed to true airspeed ratio airspeed.set_EAS2TAS(barometer.get_EAS2TAS()); } AP_HAL_MAIN();