drv_tone_alarm.h 2.24 KB
/****************************************************************************
 *
 *   Copyright (C) 2012 PX4 Development Team. All rights reserved.
 *
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 *
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/**
 * @file drv_tone_alarm.h
 *
 * Driver for the PX4 audio alarm port.
 *
 */

#pragma once

#include "drv_hrt.h"
#include <lib/tunes/tune_definition.h>
#include <uORB/topics/tune_control.h>

namespace ToneAlarmInterface
{

/**
 * @brief Activates/configures the hardware registers.
 */
void init();

/**
 * @brief Starts playing the note.
 * @return the time the note started played.
 */
hrt_abstime start_note(unsigned frequency);

/**
 * @brief Stops playing the current note and makes the player 'safe'.
 */
void stop_note();

} // ToneAlarmInterface