ardupilot/libraries/AP_Notify/ToneAlarm_PX4.cpp

91 lines
2.6 KiB
C++

/*
ToneAlarm PX4 driver
*/
/*
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_HAL.h>
#if CONFIG_HAL_BOARD == HAL_BOARD_PX4
#include "ToneAlarm_PX4.h"
#include "AP_Notify.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <drivers/drv_tone_alarm.h>
#include <stdio.h>
#include <errno.h>
extern const AP_HAL::HAL& hal;
bool ToneAlarm_PX4::init()
{
// open the tone alarm device
_tonealarm_fd = open(TONEALARM_DEVICE_PATH, 0);
if (_tonealarm_fd == -1) {
hal.console->printf("Unable to open " TONEALARM_DEVICE_PATH);
return false;
}
// set initial boot states. This prevents us issueing a arming
// warning in plane and rover on every boot
flags.armed = AP_Notify::flags.armed;
flags.failsafe_battery = AP_Notify::flags.failsafe_battery;
return true;
}
// play_tune - play one of the pre-defined tunes
bool ToneAlarm_PX4::play_tune(const uint8_t tune_number)
{
int ret = ioctl(_tonealarm_fd, TONE_SET_ALARM, tune_number);
return (ret == 0);
}
// update - updates led according to timed_updated. Should be called at 50Hz
void ToneAlarm_PX4::update()
{
// exit immediately if we haven't initialised successfully
if (_tonealarm_fd == -1) {
return;
}
// check if arming status has changed
if (flags.armed != AP_Notify::flags.armed) {
flags.armed = AP_Notify::flags.armed;
if (flags.armed) {
// arming tune
play_tune(TONE_ARMING_WARNING_TUNE);
}else{
// disarming tune
play_tune(TONE_NOTIFY_NEUTRAL_TUNE);
}
}
// check if battery status has changed
if (flags.failsafe_battery != AP_Notify::flags.failsafe_battery) {
flags.failsafe_battery = AP_Notify::flags.failsafe_battery;
if (flags.failsafe_battery) {
// low battery warning tune
play_tune(TONE_BATTERY_WARNING_FAST_TUNE);
}
}
}
#endif // CONFIG_HAL_BOARD == HAL_BOARD_PX4