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ardupilot/libraries/AP_Arming/AP_Arming.cpp

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/*
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/>.
*/
#include "AP_Arming.h"
#include <AP_Notify/AP_Notify.h>
#include <GCS_MAVLink/GCS.h>
#define AP_ARMING_COMPASS_MAGFIELD_EXPECTED 530
#define AP_ARMING_COMPASS_MAGFIELD_MIN 185 // 0.35 * 530 milligauss
#define AP_ARMING_COMPASS_MAGFIELD_MAX 875 // 1.65 * 530 milligauss
#define AP_ARMING_BOARD_VOLTAGE_MIN 4.3f
#define AP_ARMING_BOARD_VOLTAGE_MAX 5.8f
#define AP_ARMING_ACCEL_ERROR_THRESHOLD 0.75f
extern const AP_HAL::HAL& hal;
const AP_Param::GroupInfo AP_Arming::var_info[] = {
// @Param: REQUIRE
// @DisplayName: Require Arming Motors
// @Description: Arming disabled until some requirements are met. If 0, there are no requirements (arm immediately). If 1, require rudder stick or GCS arming before arming motors and sends the minimum throttle PWM value to the throttle channel when disarmed. If 2, require rudder stick or GCS arming and send 0 PWM to throttle channel when disarmed. See the ARMING_CHECK_* parameters to see what checks are done before arming. Note, if setting this parameter to 0 a reboot is required to arm the plane. Also note, even with this parameter at 0, if ARMING_CHECK parameter is not also zero the plane may fail to arm throttle at boot due to a pre-arm check failure. This parameter is relevant for ArduPlane only.
// @Values: 0:Disabled,1:THR_MIN PWM when disarmed,2:0 PWM when disarmed
// @User: Advanced
AP_GROUPINFO_FLAGS_FRAME("REQUIRE", 0, AP_Arming, require, 1,
AP_PARAM_NO_SHIFT,
AP_PARAM_FRAME_PLANE | AP_PARAM_FRAME_ROVER),
// @Param: CHECK
// @DisplayName: Arm Checks to Peform (bitmask)
// @Description: Checks prior to arming motor. This is a bitmask of checks that will be performed before allowing arming. The default is no checks, allowing arming at any time. You can select whatever checks you prefer by adding together the values of each check type to set this parameter. For example, to only allow arming when you have GPS lock and no RC failsafe you would set ARMING_CHECK to 72. For most users it is recommended that you set this to 1 to enable all checks.
// @Values: 0:None,1:All,2:Barometer,4:Compass,8:GPS Lock,16:INS(INertial Sensors - accels & gyros),32:Parameters(unused),64:RC Failsafe,128:Board voltage,256:Battery Level,512:Airspeed,1024:LoggingAvailable,2048:Hardware safety switch,4096:GPS configuration
// @Bitmask: 0:All,1:Barometer,2:Compass,3:GPS lock,4:INS,5:Parameters,6:RC,7:Board voltage,8:Battery Level,9:Airspeed,10:Logging Available,11:Hardware safety switch,12:GPS Configuration
// @User: Standard
AP_GROUPINFO("CHECK", 2, AP_Arming, checks_to_perform, ARMING_CHECK_ALL),
// @Param: ACCTHRESH
// @DisplayName: Accelerometer error threshold
// @Description: Accelerometer error threshold used to determine inconsistent accelerometers. Compares this error range to other accelerometers to detect a hardware or calibration error. Lower value means tighter check and harder to pass arming check. Not all accelerometers are created equal.
// @Units: m/s/s
// @Range: 0.25 3.0
// @User: Advanced
AP_GROUPINFO("ACCTHRESH", 3, AP_Arming, accel_error_threshold, AP_ARMING_ACCEL_ERROR_THRESHOLD),
#if !APM_BUILD_TYPE(APM_BUILD_ArduCopter)
// @Param: MIN_VOLT
// @DisplayName: Minimum arming voltage on the first battery
// @Description: The minimum voltage on the first battery to arm, 0 disables the check. This parameter is relevant for ArduPlane only.
// @Units: V
// @Increment: 0.1
// @User: Standard
AP_GROUPINFO("MIN_VOLT", 4, AP_Arming, _min_voltage[0], 0),
// @Param: MIN_VOLT2
// @DisplayName: Minimum arming voltage on the second battery
// @Description: The minimum voltage on the first battery to arm, 0 disables the check. This parameter is relevant for ArduPlane only.
// @Units: V
// @Increment: 0.1
// @User: Standard
AP_GROUPINFO("MIN_VOLT2", 5, AP_Arming, _min_voltage[1], 0),
#endif
AP_GROUPEND
};
//The function point is particularly hacky, hacky, tacky
//but I don't want to reimplement messaging to GCS at the moment:
AP_Arming::AP_Arming(const AP_AHRS &ahrs_ref, const AP_Baro &baro, Compass &compass,
const AP_BattMonitor &battery) :
ahrs(ahrs_ref),
barometer(baro),
_compass(compass),
_battery(battery),
armed(false),
arming_method(NONE)
{
AP_Param::setup_object_defaults(this, var_info);
#if APM_BUILD_TYPE(APM_BUILD_ArduCopter)
// default REQUIRE parameter to 1 (needed for Copter which is missing the parameter declaration above)
require.set_default(YES_MIN_PWM);
#endif
memset(last_accel_pass_ms, 0, sizeof(last_accel_pass_ms));
memset(last_gyro_pass_ms, 0, sizeof(last_gyro_pass_ms));
}
uint16_t AP_Arming::compass_magfield_expected() const
{
return AP_ARMING_COMPASS_MAGFIELD_EXPECTED;
}
bool AP_Arming::is_armed()
{
return require == NONE || armed;
}
uint16_t AP_Arming::get_enabled_checks()
{
return checks_to_perform;
}
bool AP_Arming::barometer_checks(bool report)
{
if ((checks_to_perform & ARMING_CHECK_ALL) ||
(checks_to_perform & ARMING_CHECK_BARO)) {
if (!barometer.all_healthy()) {
if (report) {
GCS_MAVLINK::send_statustext_all(MAV_SEVERITY_CRITICAL, "PreArm: Barometer not healthy");
}
return false;
}
}
return true;
}
bool AP_Arming::airspeed_checks(bool report)
{
if ((checks_to_perform & ARMING_CHECK_ALL) ||
(checks_to_perform & ARMING_CHECK_AIRSPEED)) {
const AP_Airspeed *airspeed = ahrs.get_airspeed();
if (airspeed == nullptr) {
// not an airspeed capable vehicle
return true;
}
if (airspeed->enabled() && airspeed->use() && !airspeed->healthy()) {
if (report) {
GCS_MAVLINK::send_statustext_all(MAV_SEVERITY_CRITICAL, "PreArm: Airspeed not healthy");
}
return false;
}
}
return true;
}
bool AP_Arming::logging_checks(bool report)
{
if ((checks_to_perform & ARMING_CHECK_ALL) ||
(checks_to_perform & ARMING_CHECK_LOGGING)) {
if (DataFlash_Class::instance()->logging_failed()) {
if (report) {
GCS_MAVLINK::send_statustext_all(MAV_SEVERITY_CRITICAL, "PreArm: Logging failed");
}
return false;
}
if (!DataFlash_Class::instance()->CardInserted()) {
if (report) {
GCS_MAVLINK::send_statustext_all(MAV_SEVERITY_CRITICAL, "PreArm: No SD card");
}
return false;
}
}
return true;
}
bool AP_Arming::ins_checks(bool report)
{
if ((checks_to_perform & ARMING_CHECK_ALL) ||
(checks_to_perform & ARMING_CHECK_INS)) {
const AP_InertialSensor &ins = ahrs.get_ins();
if (!ins.get_gyro_health_all()) {
if (report) {
GCS_MAVLINK::send_statustext_all(MAV_SEVERITY_CRITICAL, "PreArm: Gyros not healthy");
}
return false;
}
if (!ins.gyro_calibrated_ok_all()) {
if (report) {
GCS_MAVLINK::send_statustext_all(MAV_SEVERITY_CRITICAL, "PreArm: Gyros not calibrated");
}
return false;
}
if (!ins.get_accel_health_all()) {
if (report) {
GCS_MAVLINK::send_statustext_all(MAV_SEVERITY_CRITICAL, "PreArm: Accels not healthy");
}
return false;
}
if (!ins.accel_calibrated_ok_all()) {
if (report) {
GCS_MAVLINK::send_statustext_all(MAV_SEVERITY_CRITICAL, "PreArm: 3D Accel calibration needed");
}
return false;
}
//check if accelerometers have calibrated and require reboot
if (ins.accel_cal_requires_reboot()) {
if (report) {
GCS_MAVLINK::send_statustext_all(MAV_SEVERITY_CRITICAL, "PreArm: Accels calibrated requires reboot");
}
return false;
}
// check all accelerometers point in roughly same direction
if (ins.get_accel_count() > 1) {
const Vector3f &prime_accel_vec = ins.get_accel();
for(uint8_t i=0; i<ins.get_accel_count(); i++) {
if (!ins.use_accel(i)) {
continue;
}
// get next accel vector
const Vector3f &accel_vec = ins.get_accel(i);
Vector3f vec_diff = accel_vec - prime_accel_vec;
// allow for user-defined difference, typically 0.75 m/s/s. Has to pass in last 10 seconds
float threshold = accel_error_threshold;
if (i >= 2) {
/*
we allow for a higher threshold for IMU3 as it
runs at a different temperature to IMU1/IMU2,
and is not used for accel data in the EKF
*/
threshold *= 3;
}
// EKF is less sensitive to Z-axis error
vec_diff.z *= 0.5f;
if (vec_diff.length() <= threshold) {
last_accel_pass_ms[i] = AP_HAL::millis();
}
if (AP_HAL::millis() - last_accel_pass_ms[i] > 10000) {
if (report) {
GCS_MAVLINK::send_statustext_all(MAV_SEVERITY_CRITICAL, "PreArm: Accels inconsistent");
}
return false;
}
}
}
// check all gyros are giving consistent readings
if (ins.get_gyro_count() > 1) {
const Vector3f &prime_gyro_vec = ins.get_gyro();
for(uint8_t i=0; i<ins.get_gyro_count(); i++) {
if (!ins.use_gyro(i)) {
continue;
}
// get next gyro vector
const Vector3f &gyro_vec = ins.get_gyro(i);
Vector3f vec_diff = gyro_vec - prime_gyro_vec;
// allow for up to 5 degrees/s difference. Pass if it has
// been OK in last 10 seconds
if (vec_diff.length() <= radians(5)) {
last_gyro_pass_ms[i] = AP_HAL::millis();
}
if (AP_HAL::millis() - last_gyro_pass_ms[i] > 10000) {
if (report) {
GCS_MAVLINK::send_statustext_all(MAV_SEVERITY_CRITICAL, "PreArm: Gyros inconsistent");
}
return false;
}
}
}
}
return true;
}
bool AP_Arming::compass_checks(bool report)
{
if ((checks_to_perform) & ARMING_CHECK_ALL ||
(checks_to_perform) & ARMING_CHECK_COMPASS) {
if (!_compass.use_for_yaw()) {
// compass use is disabled
return true;
}
if (!_compass.healthy()) {
if (report) {
GCS_MAVLINK::send_statustext_all(MAV_SEVERITY_CRITICAL, "PreArm: Compass not healthy");
}
return false;
}
// check compass learning is on or offsets have been set
if (!_compass.learn_offsets_enabled() && !_compass.configured()) {
if (report) {
GCS_MAVLINK::send_statustext_all(MAV_SEVERITY_CRITICAL, "PreArm: Compass not calibrated");
}
return false;
}
//check if compass is calibrating
if (_compass.is_calibrating()) {
if (report) {
GCS_MAVLINK::send_statustext_all(MAV_SEVERITY_CRITICAL, "Arm: Compass calibration running");
}
return false;
}
//check if compass has calibrated and requires reboot
if (_compass.compass_cal_requires_reboot()) {
if (report) {
GCS_MAVLINK::send_statustext_all(MAV_SEVERITY_CRITICAL, "PreArm: Compass calibrated requires reboot");
}
return false;
}
// check for unreasonable compass offsets
Vector3f offsets = _compass.get_offsets();
if (offsets.length() > _compass.get_offsets_max()) {
if (report) {
GCS_MAVLINK::send_statustext_all(MAV_SEVERITY_CRITICAL, "PreArm: Compass offsets too high");
}
return false;
}
// check for unreasonable mag field length
float mag_field = _compass.get_field().length();
if (mag_field > AP_ARMING_COMPASS_MAGFIELD_MAX || mag_field < AP_ARMING_COMPASS_MAGFIELD_MIN) {
if (report) {
GCS_MAVLINK::send_statustext_all(MAV_SEVERITY_CRITICAL, "PreArm: Check mag field");
}
return false;
}
// check all compasses point in roughly same direction
if (!_compass.consistent()) {
if (report) {
GCS_MAVLINK::send_statustext_all(MAV_SEVERITY_CRITICAL,"PreArm: Compasses inconsistent");
}
return false;
}
}
return true;
}
bool AP_Arming::gps_checks(bool report)
{
const AP_GPS &gps = ahrs.get_gps();
if ((checks_to_perform & ARMING_CHECK_ALL) || (checks_to_perform & ARMING_CHECK_GPS)) {
//GPS OK?
if (home_status() == HOME_UNSET ||
gps.status() < AP_GPS::GPS_OK_FIX_3D) {
if (report) {
GCS_MAVLINK::send_statustext_all(MAV_SEVERITY_CRITICAL, "PreArm: Bad GPS Position");
}
return false;
}
}
if ((checks_to_perform & ARMING_CHECK_ALL) || (checks_to_perform & ARMING_CHECK_GPS_CONFIG)) {
uint8_t first_unconfigured = gps.first_unconfigured_gps();
if (first_unconfigured != AP_GPS::GPS_ALL_CONFIGURED) {
if (report) {
GCS_MAVLINK::send_statustext_all(MAV_SEVERITY_CRITICAL,
"PreArm: GPS %d failing configuration checks",
first_unconfigured + 1);
gps.broadcast_first_configuration_failure_reason();
}
return false;
}
}
// check GPSs are within 50m of each other and that blending is healthy
if ((checks_to_perform & ARMING_CHECK_ALL) || (checks_to_perform & ARMING_CHECK_GPS_CONFIG)) {
float distance_m;
if (!gps.all_consistent(distance_m)) {
if (report) {
GCS_MAVLINK::send_statustext_all(MAV_SEVERITY_CRITICAL,
"PreArm: GPS positions differ by %4.1fm",
(double)distance_m);
}
return false;
}
if (!gps.blend_health_check()) {
if (report) {
GCS_MAVLINK::send_statustext_all(MAV_SEVERITY_CRITICAL, "PreArm: GPS blending unhealthy");
}
return false;
}
}
return true;
}
bool AP_Arming::battery_checks(bool report)
{
if ((checks_to_perform & ARMING_CHECK_ALL) ||
(checks_to_perform & ARMING_CHECK_BATTERY)) {
if (AP_Notify::flags.failsafe_battery) {
if (report) {
GCS_MAVLINK::send_statustext_all(MAV_SEVERITY_CRITICAL, "PreArm: Battery failsafe on");
}
return false;
}
for (int i = 0; i < _battery.num_instances(); i++) {
if ((_min_voltage[i] > 0.0f) && (_battery.voltage(i) < _min_voltage[i])) {
if (report) {
GCS_MAVLINK::send_statustext_all(MAV_SEVERITY_CRITICAL, "PreArm: Battery %d voltage %.1f below minimum %.1f",
i+1,
(double)_battery.voltage(i),
(double)_min_voltage[i]);
}
return false;
}
}
}
return true;
}
bool AP_Arming::hardware_safety_check(bool report)
{
if ((checks_to_perform & ARMING_CHECK_ALL) ||
(checks_to_perform & ARMING_CHECK_SWITCH)) {
// check if safety switch has been pushed
if (hal.util->safety_switch_state() == AP_HAL::Util::SAFETY_DISARMED) {
if (report) {
GCS_MAVLINK::send_statustext_all(MAV_SEVERITY_CRITICAL, "PreArm: Hardware safety switch");
}
return false;
}
}
return true;
}
bool AP_Arming::manual_transmitter_checks(bool report)
{
if ((checks_to_perform & ARMING_CHECK_ALL) ||
(checks_to_perform & ARMING_CHECK_RC)) {
if (AP_Notify::flags.failsafe_radio) {
if (report) {
GCS_MAVLINK::send_statustext_all(MAV_SEVERITY_CRITICAL, "PreArm: Radio failsafe on");
}
return false;
}
//TODO verify radio calibration
//Requires access to Parameters ... which are implemented a little
//differently for Rover, Plane, and Copter.
}
return true;
}
bool AP_Arming::board_voltage_checks(bool report)
{
// check board voltage
if ((checks_to_perform & ARMING_CHECK_ALL) || (checks_to_perform & ARMING_CHECK_VOLTAGE)) {
if(!is_zero(hal.analogin->board_voltage()) &&
((hal.analogin->board_voltage() < AP_ARMING_BOARD_VOLTAGE_MIN) || (hal.analogin->board_voltage() > AP_ARMING_BOARD_VOLTAGE_MAX))) {
if (report) {
GCS_MAVLINK::send_statustext_all(MAV_SEVERITY_CRITICAL,"PreArm: Check board voltage");
}
return false;
}
}
return true;
}
bool AP_Arming::pre_arm_checks(bool report)
{
#if !APM_BUILD_TYPE(APM_BUILD_ArduCopter)
if (armed || require == NONE) {
// if we are already armed or don't need any arming checks
// then skip the checks
return true;
}
#endif
return hardware_safety_check(report)
& barometer_checks(report)
& ins_checks(report)
& compass_checks(report)
& gps_checks(report)
& battery_checks(report)
& logging_checks(report)
& manual_transmitter_checks(report)
& board_voltage_checks(report);
}
bool AP_Arming::arm_checks(uint8_t method)
{
if ((checks_to_perform & ARMING_CHECK_ALL) ||
(checks_to_perform & ARMING_CHECK_LOGGING)) {
if (!DataFlash_Class::instance()->logging_started()) {
GCS_MAVLINK::send_statustext_all(MAV_SEVERITY_CRITICAL, "Arm: Logging not started");
return false;
}
}
return true;
}
//returns true if arming occurred successfully
bool AP_Arming::arm(uint8_t method)
{
#if APM_BUILD_TYPE(APM_BUILD_ArduCopter)
// Copter should never use this function
return false;
#else
if (armed) { //already armed
return false;
}
//are arming checks disabled?
if (checks_to_perform == ARMING_CHECK_NONE) {
armed = true;
arming_method = NONE;
GCS_MAVLINK::send_statustext_all(MAV_SEVERITY_INFO, "Throttle armed");
return true;
}
if (pre_arm_checks(true) && arm_checks(method)) {
armed = true;
arming_method = method;
GCS_MAVLINK::send_statustext_all(MAV_SEVERITY_INFO, "Throttle armed");
//TODO: Log motor arming to the dataflash
//Can't do this from this class until there is a unified logging library
} else {
armed = false;
arming_method = NONE;
}
return armed;
#endif
}
//returns true if disarming occurred successfully
bool AP_Arming::disarm()
{
#if APM_BUILD_TYPE(APM_BUILD_ArduCopter)
// Copter should never use this function
return false;
#else
if (!armed) { // already disarmed
return false;
}
armed = false;
GCS_MAVLINK::send_statustext_all(MAV_SEVERITY_INFO, "Throttle disarmed");
//TODO: Log motor disarming to the dataflash
//Can't do this from this class until there is a unified logging library.
return true;
#endif
}
AP_Arming::ArmingRequired AP_Arming::arming_required()
{
return (AP_Arming::ArmingRequired)require.get();
}
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