ardupilot/libraries/AC_PrecLand/AC_PrecLand_IRLock.cpp

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/// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
2015-08-28 05:11:52 -03:00
#include <AP_HAL/AP_HAL.h>
#include "AC_PrecLand_IRLock.h"
extern const AP_HAL::HAL& hal;
// this only builds for PX4 so far
#if CONFIG_HAL_BOARD == HAL_BOARD_PX4 || CONFIG_HAL_BOARD == HAL_BOARD_VRBRAIN
// Constructor
AC_PrecLand_IRLock::AC_PrecLand_IRLock(const AC_PrecLand& frontend, AC_PrecLand::precland_state& state)
: AC_PrecLand_Backend(frontend, state),
irlock(),
_have_los_meas(false),
_los_meas_time_ms(0)
{
}
// init - perform initialisation of this backend
void AC_PrecLand_IRLock::init()
{
irlock.init();
}
// update - give chance to driver to get updates from sensor
void AC_PrecLand_IRLock::update()
{
// update health
_state.healthy = irlock.healthy();
// get new sensor data
irlock.update();
if (irlock.num_targets() > 0 && irlock.last_update_ms() != _los_meas_time_ms) {
irlock.get_unit_vector_body(_los_meas_body);
_have_los_meas = true;
_los_meas_time_ms = irlock.last_update_ms();
}
_have_los_meas = _have_los_meas && AP_HAL::millis()-_los_meas_time_ms <= 1000;
}
// provides a unit vector towards the target in body frame
// returns same as have_los_meas()
bool AC_PrecLand_IRLock::get_los_body(Vector3f& ret) {
if (have_los_meas()) {
ret = _los_meas_body;
return true;
}
return false;
}
// returns system time in milliseconds of last los measurement
uint32_t AC_PrecLand_IRLock::los_meas_time_ms() {
return _los_meas_time_ms;
}
// return true if there is a valid los measurement available
bool AC_PrecLand_IRLock::have_los_meas() {
return _have_los_meas;
}
#endif // PX4