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ardupilot/ArduCopter/motors.pde

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/// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
#define ARM_DELAY 20 // called at 10hz so 2 seconds
#define DISARM_DELAY 20 // called at 10hz so 2 seconds
#define AUTO_TRIM_DELAY 100 // called at 10hz so 10 seconds
#define AUTO_DISARMING_DELAY 25 // called at 1hz so 25 seconds
// arm_motors_check - checks for pilot input to arm or disarm the copter
// called at 10hz
static void arm_motors_check()
{
static int16_t arming_counter;
// ensure throttle is down
if (g.rc_3.control_in > 0) {
arming_counter = 0;
return;
}
// ensure we are in Stabilize, Acro or TOY mode
if ((control_mode > ACRO) && ((control_mode != TOY_A) && (control_mode != TOY_M))) {
arming_counter = 0;
return;
}
#if FRAME_CONFIG == HELI_FRAME
if ((motors.rsc_mode > 0) && (g.rc_8.control_in >= 10)){
arming_counter = 0;
return;
}
#endif // HELI_FRAME
#if TOY_EDF == ENABLED
int16_t tmp = g.rc_1.control_in;
#else
int16_t tmp = g.rc_4.control_in;
#endif
// full right
if (tmp > 4000) {
// increase the arming counter to a maximum of 1 beyond the auto trim counter
if( arming_counter <= AUTO_TRIM_DELAY ) {
arming_counter++;
}
// arm the motors and configure for flight
if (arming_counter == ARM_DELAY && !motors.armed()) {
// run pre-arm-checks and display failures
pre_arm_checks(true);
if(ap.pre_arm_check) {
init_arm_motors();
}else{
// reset arming counter if pre-arm checks fail
arming_counter = 0;
}
}
// arm the motors and configure for flight
if (arming_counter == AUTO_TRIM_DELAY && motors.armed()) {
auto_trim_counter = 250;
}
// full left
}else if (tmp < -4000) {
// increase the counter to a maximum of 1 beyond the disarm delay
if( arming_counter <= DISARM_DELAY ) {
arming_counter++;
}
// disarm the motors
if (arming_counter == DISARM_DELAY && motors.armed()) {
init_disarm_motors();
}
// Yaw is centered so reset arming counter
}else{
arming_counter = 0;
}
}
// auto_disarm_check - disarms the copter if it has been sitting on the ground in manual mode with throttle low for at least 25 seconds
// called at 1hz
static void auto_disarm_check()
{
static uint8_t auto_disarming_counter;
if((control_mode <= ACRO) && (g.rc_3.control_in == 0) && motors.armed()) {
auto_disarming_counter++;
if(auto_disarming_counter == AUTO_DISARMING_DELAY) {
init_disarm_motors();
}else if (auto_disarming_counter > AUTO_DISARMING_DELAY) {
auto_disarming_counter = AUTO_DISARMING_DELAY + 1;
}
}else{
auto_disarming_counter = 0;
}
}
// init_arm_motors - performs arming process including initialisation of barometer and gyros
static void init_arm_motors()
{
// arming marker
// Flag used to track if we have armed the motors the first time.
// This is used to decide if we should run the ground_start routine
// which calibrates the IMU
static bool did_ground_start = false;
// disable cpu failsafe because initialising everything takes a while
failsafe_disable();
#if LOGGING_ENABLED == ENABLED
// start dataflash
start_logging();
#endif
#if HIL_MODE != HIL_MODE_DISABLED || CONFIG_HAL_BOARD == HAL_BOARD_AVR_SITL
gcs_send_text_P(SEVERITY_HIGH, PSTR("ARMING MOTORS"));
#endif
// we don't want writes to the serial port to cause us to pause
// mid-flight, so set the serial ports non-blocking once we arm
// the motors
hal.uartA->set_blocking_writes(false);
if (gcs3.initialised) {
hal.uartC->set_blocking_writes(false);
}
#if COPTER_LEDS == ENABLED
piezo_beep_twice();
#endif
// Remember Orientation
// --------------------
init_simple_bearing();
initial_armed_bearing = ahrs.yaw_sensor;
// Reset home position
// -------------------
if(ap.home_is_set)
init_home();
// all I terms are invalid
// -----------------------
reset_I_all();
if(did_ground_start == false) {
did_ground_start = true;
startup_ground();
}
#if HIL_MODE != HIL_MODE_ATTITUDE
// read Baro pressure at ground -
// this resets Baro for more accuracy
//-----------------------------------
init_barometer();
#endif
// go back to normal AHRS gains
ahrs.set_fast_gains(false);
#if SECONDARY_DMP_ENABLED == ENABLED
ahrs2.set_fast_gains(false);
#endif
// enable gps velocity based centrefugal force compensation
ahrs.set_correct_centrifugal(true);
// set hover throttle
motors.set_mid_throttle(g.throttle_mid);
// update leds on board
update_arming_light();
#if COPTER_LEDS == ENABLED
piezo_beep_twice();
#endif
// enable output to motors
output_min();
// finally actually arm the motors
motors.armed(true);
// log arming to dataflash
Log_Write_Event(DATA_ARMED);
// reenable failsafe
failsafe_enable();
}
// perform pre-arm checks and set ap.pre_arm_check flag
static void pre_arm_checks(bool display_failure)
{
// exit immediately if we've already successfully performed the pre-arm check
if( ap.pre_arm_check ) {
return;
}
// succeed if pre arm checks are disabled
if(!g.arming_check_enabled) {
ap.pre_arm_check = true;
return;
}
// pre-arm rc checks a prerequisite
pre_arm_rc_checks();
if(!ap.pre_arm_rc_check) {
if (display_failure) {
gcs_send_text_P(SEVERITY_HIGH,PSTR("PreArm: RC not calibrated"));
}
return;
}
// check accelerometers have been calibrated
if(!ins.calibrated()) {
if (display_failure) {
gcs_send_text_P(SEVERITY_HIGH,PSTR("PreArm: INS not calibrated"));
}
return;
}
// check the compass is healthy
if(!compass.healthy) {
if (display_failure) {
gcs_send_text_P(SEVERITY_HIGH,PSTR("PreArm: Compass not healthy"));
}
return;
}
// check compass learning is on or offsets have been set
Vector3f offsets = compass.get_offsets();
if(!compass._learn && offsets.length() == 0) {
if (display_failure) {
gcs_send_text_P(SEVERITY_HIGH,PSTR("PreArm: Compass not calibrated"));
}
return;
}
// check for unreasonable compass offsets
if(offsets.length() > 500) {
if (display_failure) {
gcs_send_text_P(SEVERITY_HIGH,PSTR("PreArm: Compass offsets too high"));
}
return;
}
// check for unreasonable mag field length
float mag_field = pythagorous3(compass.mag_x, compass.mag_y, compass.mag_z);
if (mag_field > COMPASS_MAGFIELD_EXPECTED*1.65 || mag_field < COMPASS_MAGFIELD_EXPECTED*0.35) {
if (display_failure) {
gcs_send_text_P(SEVERITY_HIGH,PSTR("PreArm: Check mag field"));
}
return;
}
// barometer health check
if(!barometer.healthy) {
if (display_failure) {
gcs_send_text_P(SEVERITY_HIGH,PSTR("PreArm: Baro not healthy"));
}
return;
}
#if AC_FENCE == ENABLED
// check fence is initialised
if(!fence.pre_arm_check()) {
if (display_failure) {
gcs_send_text_P(SEVERITY_HIGH,PSTR("PreArm: No GPS Lock"));
}
return;
}
#endif
#if CONFIG_HAL_BOARD != HAL_BOARD_PX4
// check board voltage
if(board_voltage() < BOARD_VOLTAGE_MIN || board_voltage() > BOARD_VOLTAGE_MAX) {
if (display_failure) {
gcs_send_text_P(SEVERITY_HIGH,PSTR("PreArm: Check Board Voltage"));
}
return;
}
#endif
// failsafe parameter checks
if (g.failsafe_throttle) {
// check throttle min is above throttle failsafe trigger and that the trigger is above ppm encoder's loss-of-signal value of 900
if (g.rc_3.radio_min <= g.failsafe_throttle_value+10 || g.failsafe_throttle_value < 910) {
if (display_failure) {
gcs_send_text_P(SEVERITY_HIGH,PSTR("PreArm: Check FS_THR_VALUE"));
}
return;
}
}
// if we've gotten this far then pre arm checks have completed
ap.pre_arm_check = true;
}
// perform pre_arm_rc_checks checks and set ap.pre_arm_rc_check flag
static void pre_arm_rc_checks()
{
// exit immediately if we've already successfully performed the pre-arm rc check
if( ap.pre_arm_rc_check ) {
return;
}
// check if radio has been calibrated
if(!g.rc_3.radio_min.load()) {
return;
}
// check channels 1 & 2 have min <= 1300 and max >= 1700
if (g.rc_1.radio_min > 1300 || g.rc_1.radio_max < 1700 || g.rc_2.radio_min > 1300 || g.rc_2.radio_max < 1700) {
return;
}
// check channels 3 & 4 have min <= 1300 and max >= 1700
if (g.rc_3.radio_min > 1300 || g.rc_3.radio_max < 1700 || g.rc_4.radio_min > 1300 || g.rc_4.radio_max < 1700) {
return;
}
// if we've gotten this far rc is ok
ap.pre_arm_rc_check = true;
}
static void init_disarm_motors()
{
#if HIL_MODE != HIL_MODE_DISABLED || CONFIG_HAL_BOARD == HAL_BOARD_AVR_SITL
gcs_send_text_P(SEVERITY_HIGH, PSTR("DISARMING MOTORS"));
#endif
motors.armed(false);
compass.save_offsets();
g.throttle_cruise.save();
// we are not in the air
set_takeoff_complete(false);
#if COPTER_LEDS == ENABLED
piezo_beep();
#endif
// setup fast AHRS gains to get right attitude
ahrs.set_fast_gains(true);
#if SECONDARY_DMP_ENABLED == ENABLED
ahrs2.set_fast_gains(true);
#endif
// log disarm to the dataflash
Log_Write_Event(DATA_DISARMED);
// disable gps velocity based centrefugal force compensation
ahrs.set_correct_centrifugal(false);
}
/*****************************************
* Set the flight control servos based on the current calculated values
*****************************************/
static void
set_servos_4()
{
#if FRAME_CONFIG == TRI_FRAME
// To-Do: implement improved stability patch for tri so that we do not need to limit throttle input to motors
g.rc_3.servo_out = min(g.rc_3.servo_out, 800);
#endif
motors.output();
}
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