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ardupilot/APMrover2/APMrover2.cpp

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/// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
/*
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 <http://www.gnu.org/licenses/>.
*/
/*
This is the APMrover2 firmware. It was originally derived from
ArduPlane by Jean-Louis Naudin (JLN), and then rewritten after the
AP_HAL merge by Andrew Tridgell
Maintainer: Grant Morphett
Authors: Doug Weibel, Jose Julio, Jordi Munoz, Jason Short, Andrew Tridgell, Randy Mackay, Pat Hickey, John Arne Birkeland, Olivier Adler, Jean-Louis Naudin, Grant Morphett
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
APMrover alpha version tester: Franco Borasio, Daniel Chapelat...
Please contribute your ideas! See http://dev.ardupilot.com for details
*/
#include "Rover.h"
const AP_HAL::HAL& hal = AP_HAL::get_HAL();
Rover rover;
#define SCHED_TASK(func, _interval_ticks, _max_time_micros) {\
.function = FUNCTOR_BIND(&rover, &Rover::func, void),\
AP_SCHEDULER_NAME_INITIALIZER(func)\
.interval_ticks = _interval_ticks,\
.max_time_micros = _max_time_micros,\
}
/*
scheduler table - all regular tasks should be listed here, along
with how often they should be called (in 20ms units) and the maximum
time they are expected to take (in microseconds)
*/
const AP_Scheduler::Task Rover::scheduler_tasks[] = {
SCHED_TASK(read_radio, 1, 1000),
SCHED_TASK(ahrs_update, 1, 6400),
SCHED_TASK(read_sonars, 1, 2000),
SCHED_TASK(update_current_mode, 1, 1500),
SCHED_TASK(set_servos, 1, 1500),
SCHED_TASK(update_GPS_50Hz, 1, 2500),
SCHED_TASK(update_GPS_10Hz, 5, 2500),
SCHED_TASK(update_alt, 5, 3400),
SCHED_TASK(navigate, 5, 1600),
SCHED_TASK(update_compass, 5, 2000),
SCHED_TASK(update_commands, 5, 1000),
SCHED_TASK(update_logging1, 5, 1000),
SCHED_TASK(update_logging2, 5, 1000),
SCHED_TASK(gcs_retry_deferred, 1, 1000),
SCHED_TASK(gcs_update, 1, 1700),
SCHED_TASK(gcs_data_stream_send, 1, 3000),
SCHED_TASK(read_control_switch, 7, 1000),
SCHED_TASK(read_trim_switch, 5, 1000),
SCHED_TASK(read_battery, 5, 1000),
SCHED_TASK(read_receiver_rssi, 5, 1000),
SCHED_TASK(update_events, 1, 1000),
SCHED_TASK(check_usb_mux, 15, 1000),
SCHED_TASK(mount_update, 1, 600),
SCHED_TASK(gcs_failsafe_check, 5, 600),
SCHED_TASK(compass_accumulate, 1, 900),
SCHED_TASK(update_notify, 1, 300),
SCHED_TASK(one_second_loop, 50, 3000),
SCHED_TASK(compass_cal_update, 1, 100),
#if FRSKY_TELEM_ENABLED == ENABLED
SCHED_TASK(frsky_telemetry_send, 10, 100),
#endif
SCHED_TASK(dataflash_periodic, 1, 300),
};
/*
setup is called when the sketch starts
*/
void Rover::setup()
{
cliSerial = hal.console;
// load the default values of variables listed in var_info[]
AP_Param::setup_sketch_defaults();
notify.init(false);
AP_Notify::flags.failsafe_battery = false;
rssi.init();
init_ardupilot();
// initialise the main loop scheduler
scheduler.init(&scheduler_tasks[0], ARRAY_SIZE(scheduler_tasks));
}
/*
loop() is called rapidly while the sketch is running
*/
void Rover::loop()
{
// wait for an INS sample
ins.wait_for_sample();
uint32_t timer = AP_HAL::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) - micros();
if (remaining > 19500) {
remaining = 19500;
}
scheduler.run(remaining);
}
// update AHRS system
void Rover::ahrs_update()
{
hal.util->set_soft_armed(arming.is_armed() &&
hal.util->safety_switch_state() != AP_HAL::Util::SAFETY_DISARMED);
#if HIL_MODE != HIL_MODE_DISABLED
// update hil before AHRS update
gcs_update();
#endif
// when in reverse we need to tell AHRS not to assume we are a
// 'fly forward' vehicle, otherwise it will see a large
// discrepancy between the mag and the GPS heading and will try to
// correct for it, leading to a large yaw error
ahrs.set_fly_forward(!in_reverse);
ahrs.update();
// if using the EKF get a speed update now (from accelerometers)
Vector3f velocity;
if (ahrs.get_velocity_NED(velocity)) {
ground_speed = pythagorous2(velocity.x, velocity.y);
}
if (should_log(MASK_LOG_ATTITUDE_FAST))
Log_Write_Attitude();
if (should_log(MASK_LOG_IMU)) {
DataFlash.Log_Write_IMU(ins);
DataFlash.Log_Write_IMUDT(ins);
}
}
/*
update camera mount - 50Hz
*/
void Rover::mount_update(void)
{
#if MOUNT == ENABLED
camera_mount.update();
#endif
#if CAMERA == ENABLED
camera.trigger_pic_cleanup();
#endif
}
void Rover::update_alt()
{
barometer.update();
if (should_log(MASK_LOG_IMU)) {
Log_Write_Baro();
}
}
/*
check for GCS failsafe - 10Hz
*/
void Rover::gcs_failsafe_check(void)
{
if (g.fs_gcs_enabled) {
failsafe_trigger(FAILSAFE_EVENT_GCS, last_heartbeat_ms != 0 && (millis() - last_heartbeat_ms) > 2000);
}
}
/*
if the compass is enabled then try to accumulate a reading
*/
void Rover::compass_accumulate(void)
{
if (g.compass_enabled) {
compass.accumulate();
}
}
/*
check for new compass data - 10Hz
*/
void Rover::update_compass(void)
{
if (g.compass_enabled && compass.read()) {
ahrs.set_compass(&compass);
// update offsets
compass.learn_offsets();
if (should_log(MASK_LOG_COMPASS)) {
DataFlash.Log_Write_Compass(compass);
}
} else {
ahrs.set_compass(NULL);
}
}
/*
log some key data - 10Hz
*/
void Rover::update_logging1(void)
{
if (should_log(MASK_LOG_ATTITUDE_MED) && !should_log(MASK_LOG_ATTITUDE_FAST))
Log_Write_Attitude();
if (should_log(MASK_LOG_CTUN))
Log_Write_Control_Tuning();
if (should_log(MASK_LOG_NTUN))
Log_Write_Nav_Tuning();
}
/*
log some key data - 10Hz
*/
void Rover::update_logging2(void)
{
if (should_log(MASK_LOG_STEERING)) {
if (control_mode == STEERING || control_mode == AUTO || control_mode == RTL || control_mode == GUIDED) {
Log_Write_Steering();
}
}
if (should_log(MASK_LOG_RC))
Log_Write_RC();
}
/*
update aux servo mappings
*/
void Rover::update_aux(void)
{
RC_Channel_aux::enable_aux_servos();
}
/*
once a second events
*/
void Rover::one_second_loop(void)
{
if (should_log(MASK_LOG_CURRENT))
Log_Write_Current();
// send a heartbeat
gcs_send_message(MSG_HEARTBEAT);
// allow orientation change at runtime to aid config
ahrs.set_orientation();
set_control_channels();
// cope with changes to aux functions
update_aux();
// update notify flags
AP_Notify::flags.pre_arm_check = arming.pre_arm_checks(false);
AP_Notify::flags.pre_arm_gps_check = true;
AP_Notify::flags.armed = arming.is_armed() || arming.arming_required() == AP_Arming::NO;
// cope with changes to mavlink system ID
mavlink_system.sysid = g.sysid_this_mav;
static uint8_t counter;
counter++;
// write perf data every 20s
if (counter % 10 == 0) {
if (scheduler.debug() != 0) {
hal.console->printf("G_Dt_max=%lu\n", (unsigned long)G_Dt_max);
}
if (should_log(MASK_LOG_PM))
Log_Write_Performance();
G_Dt_max = 0;
resetPerfData();
}
// save compass offsets once a minute
if (counter >= 60) {
if (g.compass_enabled) {
compass.save_offsets();
}
counter = 0;
}
ins.set_raw_logging(should_log(MASK_LOG_IMU_RAW));
}
void Rover::dataflash_periodic(void)
{
DataFlash.periodic_tasks();
}
void Rover::update_GPS_50Hz(void)
{
static uint32_t last_gps_reading[GPS_MAX_INSTANCES];
gps.update();
for (uint8_t i=0; i<gps.num_sensors(); i++) {
if (gps.last_message_time_ms(i) != last_gps_reading[i]) {
last_gps_reading[i] = gps.last_message_time_ms(i);
if (should_log(MASK_LOG_GPS)) {
DataFlash.Log_Write_GPS(gps, i, current_loc.alt);
}
}
}
}
void Rover::update_GPS_10Hz(void)
{
have_position = ahrs.get_position(current_loc);
if (gps.last_message_time_ms() != last_gps_msg_ms && gps.status() >= AP_GPS::GPS_OK_FIX_3D) {
last_gps_msg_ms = gps.last_message_time_ms();
if (ground_start_count > 1){
ground_start_count--;
} 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 = 20;
} else {
init_home();
// set system clock for log timestamps
hal.util->set_system_clock(gps.time_epoch_usec());
if (g.compass_enabled) {
// Set compass declination automatically
compass.set_initial_location(gps.location().lat, gps.location().lng);
}
ground_start_count = 0;
}
}
Vector3f velocity;
if (ahrs.get_velocity_NED(velocity)) {
ground_speed = pythagorous2(velocity.x, velocity.y);
} else {
ground_speed = gps.ground_speed();
}
#if CAMERA == ENABLED
if (camera.update_location(current_loc) == true) {
do_take_picture();
}
#endif
if (!hal.util->get_soft_armed()) {
update_home();
}
}
}
void Rover::update_current_mode(void)
{
switch (control_mode){
case AUTO:
case RTL:
set_reverse(false);
calc_lateral_acceleration();
calc_nav_steer();
calc_throttle(g.speed_cruise);
break;
case GUIDED:
set_reverse(false);
if (rtl_complete || verify_RTL()) {
// we have reached destination so stop where we are
channel_throttle->servo_out = g.throttle_min.get();
channel_steer->servo_out = 0;
lateral_acceleration = 0;
} else {
calc_lateral_acceleration();
calc_nav_steer();
calc_throttle(g.speed_cruise);
}
break;
case STEERING: {
/*
in steering mode we control lateral acceleration
directly. We first calculate the maximum lateral
acceleration at full steering lock for this speed. That is
V^2/R where R is the radius of turn. We get the radius of
turn from half the STEER2SRV_P.
*/
float max_g_force = ground_speed * ground_speed / steerController.get_turn_radius();
// constrain to user set TURN_MAX_G
max_g_force = constrain_float(max_g_force, 0.1f, g.turn_max_g * GRAVITY_MSS);
lateral_acceleration = max_g_force * (channel_steer->pwm_to_angle()/4500.0f);
calc_nav_steer();
// and throttle gives speed in proportion to cruise speed, up
// to 50% throttle, then uses nudging above that.
float target_speed = channel_throttle->pwm_to_angle() * 0.01f * 2 * g.speed_cruise;
set_reverse(target_speed < 0);
if (in_reverse) {
target_speed = constrain_float(target_speed, -g.speed_cruise, 0);
} else {
target_speed = constrain_float(target_speed, 0, g.speed_cruise);
}
calc_throttle(target_speed);
break;
}
case LEARNING:
case MANUAL:
/*
in both MANUAL and LEARNING we pass through the
controls. Setting servo_out here actually doesn't matter, as
we set the exact value in set_servos(), but it helps for
logging
*/
channel_throttle->servo_out = channel_throttle->control_in;
channel_steer->servo_out = channel_steer->pwm_to_angle();
// mark us as in_reverse when using a negative throttle to
// stop AHRS getting off
set_reverse(channel_throttle->servo_out < 0);
break;
case HOLD:
// hold position - stop motors and center steering
channel_throttle->servo_out = 0;
channel_steer->servo_out = 0;
set_reverse(false);
break;
case INITIALISING:
break;
}
}
void Rover::update_navigation()
{
switch (control_mode) {
case MANUAL:
case HOLD:
case LEARNING:
case STEERING:
case INITIALISING:
break;
case AUTO:
mission.update();
break;
case RTL:
// no loitering around the wp with the rover, goes direct to the wp position
calc_lateral_acceleration();
calc_nav_steer();
if (verify_RTL()) {
channel_throttle->servo_out = g.throttle_min.get();
set_mode(HOLD);
}
break;
case GUIDED:
// no loitering around the wp with the rover, goes direct to the wp position
calc_lateral_acceleration();
calc_nav_steer();
if (rtl_complete || verify_RTL()) {
// we have reached destination so stop where we are
channel_throttle->servo_out = g.throttle_min.get();
channel_steer->servo_out = 0;
lateral_acceleration = 0;
}
break;
}
}
AP_HAL_MAIN_CALLBACKS(&rover);
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